qgstextformatwidget.cpp

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/***************************************************************************
    qgstextformatwidget.h
    ---------------------
    begin                : June 2009
    copyright            : (C) Martin Dobias
    email                : wonder dot sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#include "qgsconfig.h"
#include "qgstextformatwidget.h"
 
#include "qgsauxiliarystorage.h"
#include "qgscharacterselectordialog.h"
#include "qgsexpressioncontextutils.h"
#include "qgsfillsymbol.h"
#include "qgsfontutils.h"
#include "qgsgui.h"
#include "qgshelp.h"
#include "qgsiconutils.h"
#include "qgslogger.h"
#include "qgsmapcanvas.h"
#include "qgsmaplayer.h"
#include "qgsmarkersymbol.h"
#include "qgsmeshlayer.h"
#include "qgsnewauxiliarylayerdialog.h"
#include "qgspainteffect.h"
#include "qgspainteffectregistry.h"
#include "qgspallabeling.h"
#include "qgspathresolver.h"
#include "qgsproject.h"
#include "qgsprojectstylesettings.h"
#include "qgsprojectviewsettings.h"
#include "qgssettings.h"
#include "qgsstylesavedialog.h"
#include "qgssubstitutionlistwidget.h"
#include "qgssvgcache.h"
#include "qgssvgselectorwidget.h"
#include "qgssymbollayerreference.h"
#include "qgssymbollayerutils.h"
#include "qgstabpositionwidget.h"
#include "qgsvectorlayer.h"
 
#include <QButtonGroup>
#include <QMessageBox>
#include <QString>
 
#include "moc_qgstextformatwidget.cpp"
 
using namespace Qt::StringLiterals;
 
QgsTextFormatWidget::QgsTextFormatWidget( const QgsTextFormat &format, QgsMapCanvas *mapCanvas, QWidget *parent, QgsMapLayer *layer )
  : QWidget( parent )
  , mMapCanvas( mapCanvas )
  , mLayer( layer )
{
  initWidget();
  setWidgetMode( Text );
  populateDataDefinedButtons();
  updateWidgetForFormat( format.isValid() ? format : QgsStyle::defaultTextFormatForProject( QgsProject::instance() ) );
}
 
QgsTextFormatWidget::QgsTextFormatWidget( QgsMapCanvas *mapCanvas, QWidget *parent, Mode mode, QgsMapLayer *layer )
  : QWidget( parent )
  , mMapCanvas( mapCanvas )
  , mLayer( layer )
  , mWidgetMode( mode )
{
  initWidget();
  if ( mode == Text )
    populateDataDefinedButtons();
  setWidgetMode( mode );
}
 
void QgsTextFormatWidget::initWidget()
{
  setupUi( this );
 
  mGeometryGeneratorGroupBox->setCollapsed( true );
 
  mTextItem = new QListWidgetItem( tr( "Text" ), mLabelingOptionsListWidget );
  mTextItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/labeltext.svg"_s ) );
  mTextItem->setToolTip( tr( "Text style" ) );
 
  mFormattingItem = new QListWidgetItem( tr( "Formatting" ), mLabelingOptionsListWidget );
  mFormattingItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/labelformatting.svg"_s ) );
  mFormattingItem->setToolTip( tr( "Formatting" ) );
 
  mBufferItem = new QListWidgetItem( tr( "Buffer" ), mLabelingOptionsListWidget );
  mBufferItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/labelbuffer.svg"_s ) );
  mBufferItem->setToolTip( tr( "Buffer" ) );
 
  mMaskItem = new QListWidgetItem( tr( "Mask" ), mLabelingOptionsListWidget );
  mMaskItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/labelmask.svg"_s ) );
  mMaskItem->setToolTip( tr( "Mask" ) );
 
  mBackgroundItem = new QListWidgetItem( tr( "Background" ), mLabelingOptionsListWidget );
  mBackgroundItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/labelbackground.svg"_s ) );
  mBackgroundItem->setToolTip( tr( "Background" ) );
 
  mShadowItem = new QListWidgetItem( tr( "Shadow" ), mLabelingOptionsListWidget );
  mShadowItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/labelshadow.svg"_s ) );
  mShadowItem->setToolTip( tr( "Shadow" ) );
 
  mCalloutItem = new QListWidgetItem( tr( "Callouts" ), mLabelingOptionsListWidget );
  mCalloutItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/labelcallout.svg"_s ) );
  mCalloutItem->setToolTip( tr( "Callouts" ) );
 
  mPlacementItem = new QListWidgetItem( tr( "Placement" ), mLabelingOptionsListWidget );
  mPlacementItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/labelplacement.svg"_s ) );
  mPlacementItem->setToolTip( tr( "Placement" ) );
 
  mRenderingItem = new QListWidgetItem( tr( "Rendering" ), mLabelingOptionsListWidget );
  mRenderingItem->setIcon( QgsApplication::getThemeIcon( u"propertyicons/render.svg"_s ) );
  mRenderingItem->setToolTip( tr( "Rendering" ) );
 
#if ( GEOS_VERSION_MAJOR == 3 && GEOS_VERSION_MINOR < 10 )
  mDuplicatesStackedWidget->setCurrentWidget( mDuplicatesNotAvailableWidget );
  mLabelSpacingStackedWidget->setCurrentWidget( mLabelSpacingNotAvailableWidget );
#endif
 
  mLabelingOptionsListWidget->addItem( mTextItem );
  mLabelingOptionsListWidget->addItem( mFormattingItem );
  mLabelingOptionsListWidget->addItem( mBufferItem );
  mLabelingOptionsListWidget->addItem( mMaskItem );
  mLabelingOptionsListWidget->addItem( mBackgroundItem );
  mLabelingOptionsListWidget->addItem( mShadowItem );
  mLabelingOptionsListWidget->addItem( mCalloutItem );
  mLabelingOptionsListWidget->addItem( mPlacementItem );
  mLabelingOptionsListWidget->addItem( mRenderingItem );
 
  QObject::connect( mOptionsTab, &QTabWidget::currentChanged, this, [this]( int index ) {
    if ( index == mOptionsTab->indexOf( textTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Text );
    else if ( index == mOptionsTab->indexOf( formattingTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Formatting );
    else if ( index == mOptionsTab->indexOf( maskTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Mask );
    else if ( index == mOptionsTab->indexOf( bufferTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Buffer );
    else if ( index == mOptionsTab->indexOf( backgroundTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Background );
    else if ( index == mOptionsTab->indexOf( shadowTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Shadow );
    else if ( index == mOptionsTab->indexOf( calloutsTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Callouts );
    else if ( index == mOptionsTab->indexOf( placementTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Placement );
    else if ( index == mOptionsTab->indexOf( renderingTab ) )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Rendering );
  } );
 
  QObject::connect( mLabelingOptionsListWidget, &QListWidget::currentRowChanged, this, [this]( int ) {
    QListWidgetItem *currentItem = mLabelingOptionsListWidget->currentItem();
    if ( !currentItem )
      return;
    if ( currentItem == mTextItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Text );
    else if ( currentItem == mFormattingItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Formatting );
    else if ( currentItem == mMaskItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Mask );
    else if ( currentItem == mBufferItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Buffer );
    else if ( currentItem == mBackgroundItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Background );
    else if ( currentItem == mShadowItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Shadow );
    else if ( currentItem == mCalloutItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Callouts );
    else if ( currentItem == mPlacementItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Placement );
    else if ( currentItem == mRenderingItem )
      mLabelStackedWidget->setCurrentWidget( mLabelPage_Rendering );
  } );
 
  QObject::connect( mLabelingOptionsListWidget, &QListWidget::currentRowChanged, mLabelStackedWidget, &QStackedWidget::setCurrentIndex );
 
  connect( mShapeSVGPathLineEdit, &QLineEdit::textChanged, this, &QgsTextFormatWidget::mShapeSVGPathLineEdit_textChanged );
  connect( mFontSizeSpinBox, static_cast<void ( QDoubleSpinBox::* )( double )>( &QDoubleSpinBox::valueChanged ), this, &QgsTextFormatWidget::mFontSizeSpinBox_valueChanged );
  connect( mFontFamilyCmbBx, &QFontComboBox::currentFontChanged, this, &QgsTextFormatWidget::mFontFamilyCmbBx_currentFontChanged );
  connect( mFontStyleComboBox, &QComboBox::currentTextChanged, this, &QgsTextFormatWidget::mFontStyleComboBox_currentIndexChanged );
  connect( mFontUnderlineBtn, &QToolButton::toggled, this, &QgsTextFormatWidget::mFontUnderlineBtn_toggled );
  connect( mFontStrikethroughBtn, &QToolButton::toggled, this, &QgsTextFormatWidget::mFontStrikethroughBtn_toggled );
  connect( mFontWordSpacingSpinBox, static_cast<void ( QDoubleSpinBox::* )( double )>( &QDoubleSpinBox::valueChanged ), this, &QgsTextFormatWidget::mFontWordSpacingSpinBox_valueChanged );
  connect( mFontLetterSpacingSpinBox, static_cast<void ( QDoubleSpinBox::* )( double )>( &QDoubleSpinBox::valueChanged ), this, &QgsTextFormatWidget::mFontLetterSpacingSpinBox_valueChanged );
  connect( mFontSizeUnitWidget, &QgsUnitSelectionWidget::changed, this, &QgsTextFormatWidget::mFontSizeUnitWidget_changed );
  connect( mFontMinPixelSpinBox, static_cast<void ( QSpinBox::* )( int )>( &QSpinBox::valueChanged ), this, &QgsTextFormatWidget::mFontMinPixelSpinBox_valueChanged );
  connect( mFontMaxPixelSpinBox, static_cast<void ( QSpinBox::* )( int )>( &QSpinBox::valueChanged ), this, &QgsTextFormatWidget::mFontMaxPixelSpinBox_valueChanged );
  connect( mBufferUnitWidget, &QgsUnitSelectionWidget::changed, this, &QgsTextFormatWidget::mBufferUnitWidget_changed );
  connect( mMaskBufferUnitWidget, &QgsUnitSelectionWidget::changed, this, &QgsTextFormatWidget::mMaskBufferUnitWidget_changed );
  connect( mCoordXDDBtn, &QgsPropertyOverrideButton::changed, this, &QgsTextFormatWidget::mCoordXDDBtn_changed );
  connect( mCoordXDDBtn, &QgsPropertyOverrideButton::activated, this, &QgsTextFormatWidget::mCoordXDDBtn_activated );
  connect( mCoordYDDBtn, &QgsPropertyOverrideButton::changed, this, &QgsTextFormatWidget::mCoordYDDBtn_changed );
  connect( mCoordYDDBtn, &QgsPropertyOverrideButton::activated, this, &QgsTextFormatWidget::mCoordYDDBtn_activated );
  connect( mCoordPointDDBtn, &QgsPropertyOverrideButton::changed, this, &QgsTextFormatWidget::mCoordPointDDBtn_changed );
  connect( mCoordPointDDBtn, &QgsPropertyOverrideButton::activated, this, &QgsTextFormatWidget::mCoordPointDDBtn_activated );
  connect( mShapeTypeCmbBx, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsTextFormatWidget::mShapeTypeCmbBx_currentIndexChanged );
  connect( mShapeRotationCmbBx, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsTextFormatWidget::mShapeRotationCmbBx_currentIndexChanged );
  connect( mShapeSVGParamsBtn, &QPushButton::clicked, this, &QgsTextFormatWidget::mShapeSVGParamsBtn_clicked );
  connect( mShapeSVGSelectorBtn, &QPushButton::clicked, this, &QgsTextFormatWidget::mShapeSVGSelectorBtn_clicked );
  connect( mPreviewTextEdit, &QLineEdit::textChanged, this, &QgsTextFormatWidget::mPreviewTextEdit_textChanged );
  connect( mPreviewTextBtn, &QToolButton::clicked, this, &QgsTextFormatWidget::mPreviewTextBtn_clicked );
  connect( mPreviewBackgroundBtn, &QgsColorButton::colorChanged, this, &QgsTextFormatWidget::mPreviewBackgroundBtn_colorChanged );
  connect( mDirectSymbLeftToolBtn, &QToolButton::clicked, this, &QgsTextFormatWidget::mDirectSymbLeftToolBtn_clicked );
  connect( mDirectSymbRightToolBtn, &QToolButton::clicked, this, &QgsTextFormatWidget::mDirectSymbRightToolBtn_clicked );
  connect( chkLineOrientationDependent, &QCheckBox::toggled, this, &QgsTextFormatWidget::chkLineOrientationDependent_toggled );
  connect( mToolButtonConfigureSubstitutes, &QToolButton::clicked, this, &QgsTextFormatWidget::mToolButtonConfigureSubstitutes_clicked );
  connect( mKerningCheckBox, &QCheckBox::toggled, this, &QgsTextFormatWidget::kerningToggled );
  connect( mComboOverlapHandling, qOverload<int>( &QComboBox::currentIndexChanged ), this, &QgsTextFormatWidget::overlapModeChanged );
  connect( mTabStopsButton, &QToolButton::clicked, this, &QgsTextFormatWidget::configureTabStops );
 
  const int iconSize = QgsGuiUtils::scaleIconSize( 20 );
  mOptionsTab->setIconSize( QSize( iconSize, iconSize ) );
  mLabelingOptionsListWidget->setIconSize( QSize( iconSize, iconSize ) );
  const int iconSize32 = QgsGuiUtils::scaleIconSize( 32 );
  const int iconSize24 = QgsGuiUtils::scaleIconSize( 24 );
  const int iconSize18 = QgsGuiUtils::scaleIconSize( 18 );
  const int iconSize16 = QgsGuiUtils::scaleIconSize( 16 );
 
  mPreviewTextBtn->setIconSize( QSize( iconSize16, iconSize16 ) );
  mPointOffsetAboveLeft->setIconSize( QSize( iconSize32, iconSize18 ) );
  mPointOffsetAbove->setIconSize( QSize( iconSize32, iconSize18 ) );
  mPointOffsetAboveRight->setIconSize( QSize( iconSize32, iconSize18 ) );
  mPointOffsetLeft->setIconSize( QSize( iconSize32, iconSize18 ) );
  mPointOffsetOver->setIconSize( QSize( iconSize32, iconSize18 ) );
  mPointOffsetRight->setIconSize( QSize( iconSize32, iconSize18 ) );
  mPointOffsetBelowLeft->setIconSize( QSize( iconSize32, iconSize18 ) );
  mPointOffsetBelow->setIconSize( QSize( iconSize32, iconSize18 ) );
  mPointOffsetBelowRight->setIconSize( QSize( iconSize32, iconSize18 ) );
  mLabelMinScale->setPixmap( QgsApplication::getThemeIcon( u"/mActionZoomOut.svg"_s ).pixmap( QSize( iconSize24, iconSize24 ) ) );
  mLabelMaxScale->setPixmap( QgsApplication::getThemeIcon( u"/mActionZoomIn.svg"_s ).pixmap( QSize( iconSize24, iconSize24 ) ) );
 
  const int buttonSize = QgsGuiUtils::scaleIconSize( 24 );
  mFontUnderlineBtn->setMinimumSize( buttonSize, buttonSize );
  mFontUnderlineBtn->setMaximumSize( buttonSize, buttonSize );
  mFontStrikethroughBtn->setMinimumSize( buttonSize, buttonSize );
  mFontStrikethroughBtn->setMaximumSize( buttonSize, buttonSize );
  mFontBoldBtn->setMinimumSize( buttonSize, buttonSize );
  mFontBoldBtn->setMaximumSize( buttonSize, buttonSize );
  mFontItalicBtn->setMinimumSize( buttonSize, buttonSize );
  mFontItalicBtn->setMaximumSize( buttonSize, buttonSize );
 
  mPreviewScaleComboBox->setMapCanvas( mMapCanvas );
  mPreviewScaleComboBox->setShowCurrentScaleButton( true );
  connect( mPreviewScaleComboBox, &QgsScaleWidget::scaleChanged, this, &QgsTextFormatWidget::previewScaleChanged );
 
  const auto unitWidgets = findChildren<QgsUnitSelectionWidget *>();
  for ( QgsUnitSelectionWidget *unitWidget : unitWidgets )
  {
    unitWidget->setMapCanvas( mMapCanvas );
  }
  mFontSizeUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Points << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Inches
  );
  mBufferUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList()
    << Qgis::RenderUnit::Millimeters
    << Qgis::RenderUnit::MetersInMapUnits
    << Qgis::RenderUnit::MapUnits
    << Qgis::RenderUnit::Pixels
    << Qgis::RenderUnit::Points
    << Qgis::RenderUnit::Inches
    << Qgis::RenderUnit::Percentage
  );
  mMaskBufferUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList()
    << Qgis::RenderUnit::Millimeters
    << Qgis::RenderUnit::MetersInMapUnits
    << Qgis::RenderUnit::MapUnits
    << Qgis::RenderUnit::Pixels
    << Qgis::RenderUnit::Points
    << Qgis::RenderUnit::Inches
    << Qgis::RenderUnit::Percentage
  );
  mShapeSizeUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mShapeOffsetUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mShapeRadiusUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList()
    << Qgis::RenderUnit::Millimeters
    << Qgis::RenderUnit::MetersInMapUnits
    << Qgis::RenderUnit::MapUnits
    << Qgis::RenderUnit::Pixels
    << Qgis::RenderUnit::Percentage
    << Qgis::RenderUnit::Points
    << Qgis::RenderUnit::Inches
  );
  mShapeStrokeWidthUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mShadowOffsetUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList()
    << Qgis::RenderUnit::Millimeters
    << Qgis::RenderUnit::MetersInMapUnits
    << Qgis::RenderUnit::MapUnits
    << Qgis::RenderUnit::Pixels
    << Qgis::RenderUnit::Points
    << Qgis::RenderUnit::Inches
    << Qgis::RenderUnit::Percentage
  );
  mShadowRadiusUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList()
    << Qgis::RenderUnit::Millimeters
    << Qgis::RenderUnit::MetersInMapUnits
    << Qgis::RenderUnit::MapUnits
    << Qgis::RenderUnit::Pixels
    << Qgis::RenderUnit::Points
    << Qgis::RenderUnit::Inches
    << Qgis::RenderUnit::Percentage
  );
  mPointOffsetUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mLineDistanceUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mMaximumDistanceUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mRepeatDistanceUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mOverrunDistanceUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mLabelMarginUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::MetersInMapUnits << Qgis::RenderUnit::MapUnits << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mLineHeightUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Percentage << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mTabDistanceUnitWidget->setUnits(
    QgsUnitTypes::RenderUnitList() << Qgis::RenderUnit::Percentage << Qgis::RenderUnit::Millimeters << Qgis::RenderUnit::Pixels << Qgis::RenderUnit::Points << Qgis::RenderUnit::Inches
  );
  mFontLineHeightSpinBox->setClearValue( 100.0 );
  mShapeRotationDblSpnBx->setClearValue( 0.0 );
  mShapeOffsetXSpnBx->setClearValue( 0.0 );
  mShapeOffsetYSpnBx->setClearValue( 0.0 );
  mPointOffsetXSpinBox->setClearValue( 0.0 );
  mPointOffsetYSpinBox->setClearValue( 0.0 );
  mPointAngleSpinBox->setClearValue( 0.0 );
  mFontLetterSpacingSpinBox->setClearValue( 0.0 );
  mFontWordSpacingSpinBox->setClearValue( 0.0 );
  mZIndexSpinBox->setClearValue( 0.0 );
  mLineDistanceSpnBx->setClearValue( 0.0 );
  mMaximumDistanceSpnBx->setMinimum( 0 );
  mMaximumDistanceSpnBx->setClearValue( 0.0, tr( "Not set" ) );
  mSpinStretch->setClearValue( 100 );
  mTabStopDistanceSpin->setMinimum( 0 );
 
  connect( mLineHeightUnitWidget, &QgsUnitSelectionWidget::changed, this, [this] {
    if ( mLineHeightUnitWidget->unit() == Qgis::RenderUnit::Percentage )
      mFontLineHeightSpinBox->setClearValue( 100.0 );
    else
      mFontLineHeightSpinBox->setClearValue( 10.0 );
  } );
 
  mOffsetTypeComboBox->addItem( tr( "From Point" ), static_cast<int>( Qgis::LabelOffsetType::FromPoint ) );
  mOffsetTypeComboBox->addItem( tr( "From Symbol Bounds" ), static_cast<int>( Qgis::LabelOffsetType::FromSymbolBounds ) );
 
  mShapeTypeCmbBx->addItem( tr( "Rectangle" ), QgsTextBackgroundSettings::ShapeRectangle );
  mShapeTypeCmbBx->addItem( tr( "Square" ), QgsTextBackgroundSettings::ShapeSquare );
  mShapeTypeCmbBx->addItem( tr( "Ellipse" ), QgsTextBackgroundSettings::ShapeEllipse );
  mShapeTypeCmbBx->addItem( tr( "Circle" ), QgsTextBackgroundSettings::ShapeCircle );
  mShapeTypeCmbBx->addItem( tr( "SVG" ), QgsTextBackgroundSettings::ShapeSVG );
  mShapeTypeCmbBx->addItem( tr( "Marker Symbol" ), QgsTextBackgroundSettings::ShapeMarkerSymbol );
 
  mComboOverlapHandling->addItem( tr( "Never Overlap" ), static_cast<int>( Qgis::LabelOverlapHandling::PreventOverlap ) );
  mComboOverlapHandling->addItem( tr( "Allow Overlaps if Required" ), static_cast<int>( Qgis::LabelOverlapHandling::AllowOverlapIfRequired ) );
  mComboOverlapHandling->addItem( tr( "Allow Overlaps without Penalty" ), static_cast<int>( Qgis::LabelOverlapHandling::AllowOverlapAtNoCost ) );
 
  mPrioritizationComboBox->addItem( tr( "Prefer Closer Labels" ), QVariant::fromValue( Qgis::LabelPrioritization::PreferCloser ) );
  mPrioritizationComboBox->addItem( tr( "Prefer Position Ordering" ), QVariant::fromValue( Qgis::LabelPrioritization::PreferPositionOrdering ) );
 
  mComboCurvedLabelMode->addItem( tr( "Default" ), QVariant::fromValue( Qgis::CurvedLabelMode::Default ) );
  mComboCurvedLabelMode->addItem( tr( "Stretch Word Spacing" ), QVariant::fromValue( Qgis::CurvedLabelMode::StretchWordSpacingToFitLine ) );
  mComboCurvedLabelMode->addItem( tr( "Stretch Character Spacing" ), QVariant::fromValue( Qgis::CurvedLabelMode::StretchCharacterSpacingToFitLine ) );
  mComboCurvedLabelMode->addItem( tr( "Characters at Vertices" ), QVariant::fromValue( Qgis::CurvedLabelMode::PlaceCharactersAtVertices ) );
  connect( mComboCurvedLabelMode, qOverload<int>( &QComboBox::currentIndexChanged ), this, &QgsTextFormatWidget::updateCurvedLabelDescription );
  QFont font = mCurvedModeDescriptionLabel->font();
  font.setItalic( true );
  mCurvedModeDescriptionLabel->setFont( font );
  updateCurvedLabelDescription();
 
  mComboMultipartBehavior->addItem( tr( "Label Largest Part Only" ), QVariant::fromValue( Qgis::MultiPartLabelingBehavior::LabelLargestPartOnly ) );
  mComboMultipartBehavior->addItem( tr( "Label Every Part with Entire Label" ), QVariant::fromValue( Qgis::MultiPartLabelingBehavior::LabelEveryPartWithEntireLabel ) );
  mComboMultipartBehavior->addItem( tr( "Split Label Text Lines over Parts" ), QVariant::fromValue( Qgis::MultiPartLabelingBehavior::SplitLabelTextLinesOverParts ) );
 
  updateAvailableShadowPositions();
 
  mBackgroundMarkerSymbolButton->setSymbolType( Qgis::SymbolType::Marker );
  mBackgroundMarkerSymbolButton->setDialogTitle( tr( "Background Symbol" ) );
  mBackgroundMarkerSymbolButton->registerExpressionContextGenerator( this );
  mBackgroundMarkerSymbolButton->setMapCanvas( mMapCanvas );
  mBackgroundFillSymbolButton->setSymbolType( Qgis::SymbolType::Fill );
  mBackgroundFillSymbolButton->setDialogTitle( tr( "Background Symbol" ) );
  mBackgroundFillSymbolButton->registerExpressionContextGenerator( this );
  mBackgroundFillSymbolButton->setMapCanvas( mMapCanvas );
 
  mCharDlg = new QgsCharacterSelectorDialog( this );
 
  mRefFont = lblFontPreview->font();
 
  // internal connections
  connect( mShadowOffsetAngleDial, &QAbstractSlider::valueChanged, mShadowOffsetAngleSpnBx, &QSpinBox::setValue );
  connect( mShadowOffsetAngleSpnBx, static_cast<void ( QSpinBox::* )( int )>( &QSpinBox::valueChanged ), mShadowOffsetAngleDial, &QAbstractSlider::setValue );
  connect( mLimitLabelChkBox, &QAbstractButton::toggled, mLimitLabelSpinBox, &QWidget::setEnabled );
  connect( mCheckBoxSubstituteText, &QAbstractButton::toggled, mToolButtonConfigureSubstitutes, &QWidget::setEnabled );
 
  //connections to prevent users removing all line placement positions
  connect( chkLineAbove, &QAbstractButton::toggled, this, &QgsTextFormatWidget::updateLinePlacementOptions );
  connect( chkLineBelow, &QAbstractButton::toggled, this, &QgsTextFormatWidget::updateLinePlacementOptions );
  connect( chkLineOn, &QAbstractButton::toggled, this, &QgsTextFormatWidget::updateLinePlacementOptions );
 
  mTextOrientationComboBox->addItem( tr( "Horizontal" ), static_cast<int>( Qgis::TextOrientation::Horizontal ) );
  mTextOrientationComboBox->addItem( tr( "Vertical" ), static_cast<int>( Qgis::TextOrientation::Vertical ) );
 
  populateFontCapitalsComboBox();
 
  // color buttons
  mPreviewBackgroundBtn->setColorDialogTitle( tr( "Select Fill Color" ) );
  mPreviewBackgroundBtn->setContext( u"labeling"_s );
  mPreviewBackgroundBtn->setColor( QColor( 255, 255, 255 ) );
  btnTextColor->setColorDialogTitle( tr( "Select Text Color" ) );
  btnTextColor->setContext( u"labeling"_s );
  btnTextColor->setDefaultColor( Qt::black );
  btnBufferColor->setColorDialogTitle( tr( "Select Buffer Color" ) );
  btnBufferColor->setContext( u"labeling"_s );
  btnBufferColor->setDefaultColor( Qt::white );
  mShapeStrokeColorBtn->setColorDialogTitle( tr( "Select Stroke Color" ) );
  mShapeStrokeColorBtn->setContext( u"labeling"_s );
  mShapeFillColorBtn->setColorDialogTitle( tr( "Select Fill Color" ) );
  mShapeFillColorBtn->setContext( u"labeling"_s );
  mShadowColorBtn->setColorDialogTitle( tr( "Select Shadow Color" ) );
  mShadowColorBtn->setContext( u"labeling"_s );
  mShadowColorBtn->setDefaultColor( Qt::black );
 
  mFontColorDDBtn->registerLinkedWidget( btnTextColor );
  mBufferColorDDBtn->registerLinkedWidget( btnBufferColor );
  mShapeStrokeColorDDBtn->registerLinkedWidget( mShapeStrokeColorBtn );
  mShapeFillColorDDBtn->registerLinkedWidget( mShapeFillColorBtn );
  mShadowColorDDBtn->registerLinkedWidget( mShadowColorBtn );
 
  // set up quadrant offset button group
  mQuadrantBtnGrp = new QButtonGroup( this );
  mQuadrantBtnGrp->addButton( mPointOffsetAboveLeft, static_cast<int>( Qgis::LabelQuadrantPosition::AboveLeft ) );
  mQuadrantBtnGrp->addButton( mPointOffsetAbove, static_cast<int>( Qgis::LabelQuadrantPosition::Above ) );
  mQuadrantBtnGrp->addButton( mPointOffsetAboveRight, static_cast<int>( Qgis::LabelQuadrantPosition::AboveRight ) );
  mQuadrantBtnGrp->addButton( mPointOffsetLeft, static_cast<int>( Qgis::LabelQuadrantPosition::Left ) );
  mQuadrantBtnGrp->addButton( mPointOffsetOver, static_cast<int>( Qgis::LabelQuadrantPosition::Over ) );
  mQuadrantBtnGrp->addButton( mPointOffsetRight, static_cast<int>( Qgis::LabelQuadrantPosition::Right ) );
  mQuadrantBtnGrp->addButton( mPointOffsetBelowLeft, static_cast<int>( Qgis::LabelQuadrantPosition::BelowLeft ) );
  mQuadrantBtnGrp->addButton( mPointOffsetBelow, static_cast<int>( Qgis::LabelQuadrantPosition::Below ) );
  mQuadrantBtnGrp->addButton( mPointOffsetBelowRight, static_cast<int>( Qgis::LabelQuadrantPosition::BelowRight ) );
  mQuadrantBtnGrp->setExclusive( true );
 
  // setup direction symbol(s) button group
  mDirectSymbBtnGrp = new QButtonGroup( this );
  mDirectSymbBtnGrp->addButton( mDirectSymbRadioBtnLR, static_cast<int>( QgsLabelLineSettings::DirectionSymbolPlacement::SymbolLeftRight ) );
  mDirectSymbBtnGrp->addButton( mDirectSymbRadioBtnAbove, static_cast<int>( QgsLabelLineSettings::DirectionSymbolPlacement::SymbolAbove ) );
  mDirectSymbBtnGrp->addButton( mDirectSymbRadioBtnBelow, static_cast<int>( QgsLabelLineSettings::DirectionSymbolPlacement::SymbolBelow ) );
  mDirectSymbBtnGrp->setExclusive( true );
 
  // upside-down labels button group
  mUpsidedownBtnGrp = new QButtonGroup( this );
  mUpsidedownBtnGrp->addButton( mUpsidedownRadioOff, static_cast<int>( Qgis::UpsideDownLabelHandling::FlipUpsideDownLabels ) );
  mUpsidedownBtnGrp->addButton( mUpsidedownRadioDefined, static_cast<int>( Qgis::UpsideDownLabelHandling::AllowUpsideDownWhenRotationIsDefined ) );
  mUpsidedownBtnGrp->addButton( mUpsidedownRadioAll, static_cast<int>( Qgis::UpsideDownLabelHandling::AlwaysAllowUpsideDown ) );
  mUpsidedownBtnGrp->setExclusive( true );
 
  //mShapeCollisionsChkBx->setVisible( false ); // until implemented
 
  // post updatePlacementWidgets() connections
  connect( chkLineAbove, &QAbstractButton::toggled, this, &QgsTextFormatWidget::updatePlacementWidgets );
  connect( chkLineBelow, &QAbstractButton::toggled, this, &QgsTextFormatWidget::updatePlacementWidgets );
  connect( mCheckAllowLabelsOutsidePolygons, &QAbstractButton::toggled, this, &QgsTextFormatWidget::updatePlacementWidgets );
  connect( mAllowOutsidePolygonsDDBtn, &QgsPropertyOverrideButton::changed, this, &QgsTextFormatWidget::updatePlacementWidgets );
 
  connect( mPlacementModeComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsTextFormatWidget::updatePlacementWidgets );
 
  // Global settings group for groupboxes' saved/restored collapsed state
  // maintains state across different dialogs
  const auto groupBoxes = findChildren<QgsCollapsibleGroupBox *>();
  for ( QgsCollapsibleGroupBox *grpbox : groupBoxes )
  {
    grpbox->setSettingGroup( u"mAdvLabelingDlg"_s );
  }
 
  connect( groupBox_mPreview, &QgsCollapsibleGroupBoxBasic::collapsedStateChanged, this, &QgsTextFormatWidget::collapseSample );
 
  // get rid of annoying outer focus rect on Mac
  mLabelingOptionsListWidget->setAttribute( Qt::WA_MacShowFocusRect, false );
 
  const QgsSettings settings;
 
  // reset horiz stretch of left side of options splitter (set to 1 for previewing in Qt Designer)
  QSizePolicy policy( mLabelingOptionsListFrame->sizePolicy() );
  policy.setHorizontalStretch( 0 );
  mLabelingOptionsListFrame->setSizePolicy( policy );
  if ( !settings.contains( u"/Windows/Labeling/OptionsSplitState"_s ) )
  {
    // set left list widget width on initial showing
    QList<int> splitsizes;
    splitsizes << 115;
    mLabelingOptionsSplitter->setSizes( splitsizes );
  }
 
  // set up reverse connection from stack to list
  connect( mLabelStackedWidget, &QStackedWidget::currentChanged, this, &QgsTextFormatWidget::optionsStackedWidget_CurrentChanged );
 
  // restore dialog, splitters and current tab
  mFontPreviewSplitter->restoreState( settings.value( u"Windows/Labeling/FontPreviewSplitState"_s ).toByteArray() );
  mLabelingOptionsSplitter->restoreState( settings.value( u"Windows/Labeling/OptionsSplitState"_s ).toByteArray() );
 
  mLabelingOptionsListWidget->setCurrentRow( settings.value( u"Windows/Labeling/Tab"_s, 0 ).toInt() );
 
  mBufferEffect.reset( QgsPaintEffectRegistry::defaultStack() );
  connect( mBufferEffectWidget, &QgsEffectStackCompactWidget::changed, this, &QgsTextFormatWidget::updatePreview );
  mBufferEffectWidget->setPaintEffect( mBufferEffect.get() );
 
  mMaskEffect.reset( QgsPaintEffectRegistry::defaultStack() );
  connect( mMaskEffectWidget, &QgsEffectStackCompactWidget::changed, this, &QgsTextFormatWidget::updatePreview );
  mMaskEffectWidget->setPaintEffect( mMaskEffect.get() );
 
  mBackgroundEffect.reset( QgsPaintEffectRegistry::defaultStack() );
  connect( mBackgroundEffectWidget, &QgsEffectStackCompactWidget::changed, this, &QgsTextFormatWidget::updatePreview );
  mBackgroundEffectWidget->setPaintEffect( mBackgroundEffect.get() );
 
  overlapModeChanged();
 
  setDockMode( false );
 
  QList<QWidget *> widgets;
  widgets
    << btnBufferColor
    << btnTextColor
    << mComboMultipartBehavior
    << chkLineAbove
    << chkLineBelow
    << chkLineOn
    << chkLineOrientationDependent
    << chkMergeLines
    << chkPreserveRotation
    << comboBlendMode
    << comboBufferBlendMode
    << mBufferDrawChkBx
    << mBufferJoinStyleComboBox
    << mBufferTranspFillChbx
    << mBufferOpacityWidget
    << mCentroidInsideCheckBox
    << mChkNoObstacle
    << mCoordRotationUnitComboBox
    << mDirectSymbChkBx
    << mDirectSymbLeftLineEdit
    << mDirectSymbRevChkBx
    << mDirectSymbRightLineEdit
    << mFitInsidePolygonCheckBox
    << mFontCapitalsComboBox
    << mFontLetterSpacingSpinBox
    << mFontLimitPixelChkBox
    << mFontLineHeightSpinBox
    << mLineHeightUnitWidget
    << mFontMaxPixelSpinBox
    << mFontMinPixelSpinBox
    << mFontMultiLineAlignComboBox
    << mFontSizeSpinBox
    << mFontStyleComboBox
    << mTextOrientationComboBox
    << mTextOpacityWidget
    << mSpinStretch
    << mFontWordSpacingSpinBox
    << mFormatNumChkBx
    << mFormatNumDecimalsSpnBx
    << mFormatNumPlusSignChkBx
    << mLimitLabelChkBox
    << mLimitLabelSpinBox
    << mLineDistanceSpnBx
    << mLineDistanceUnitWidget
    << mMaximumDistanceSpnBx
    << mMaximumDistanceUnitWidget
    << mMaxCharAngleInDSpinBox
    << mMaxCharAngleOutDSpinBox
    << mMinSizeSpinBox
    << mOffsetTypeComboBox
    << mCheckAllowDegradedPlacement
    << mComboOverlapHandling
    << mPointAngleSpinBox
    << mPointOffsetUnitWidget
    << mPointOffsetXSpinBox
    << mPointOffsetYSpinBox
    << mPreviewBackgroundBtn
    << mPreviewTextEdit
    << mPrioritySlider
    << mRepeatDistanceSpinBox
    << mRepeatDistanceUnitWidget
    << mOverrunDistanceSpinBox
    << mOverrunDistanceUnitWidget
    << mLabelMarginSpinBox
    << mLabelMarginUnitWidget
    << mScaleBasedVisibilityChkBx
    << mMaxScaleWidget
    << mMinScaleWidget
    << mShadowBlendCmbBx
    << mShadowColorBtn
    << mShadowDrawChkBx
    << mShadowOffsetAngleSpnBx
    << mShadowOffsetGlobalChkBx
    << mShadowOffsetSpnBx
    << mShadowOffsetUnitWidget
    << mShadowRadiusAlphaChkBx
    << mShadowRadiusDblSpnBx
    << mShadowRadiusUnitWidget
    << mShadowScaleSpnBx
    << mShadowOpacityWidget
    << mShadowUnderCmbBx
    << mShapeBlendCmbBx
    << mShapeStrokeColorBtn
    << mShapeStrokeWidthSpnBx
    << mShapeStrokeWidthUnitWidget
    << mShapeDrawChkBx
    << mShapeFillColorBtn
    << mShapeOffsetXSpnBx
    << mShapeOffsetYSpnBx
    << mShapeOffsetUnitWidget
    << mShapeRadiusXDbSpnBx
    << mShapeRadiusYDbSpnBx
    << mShapeRotationCmbBx
    << mShapeRotationDblSpnBx
    << mShapeRadiusUnitWidget
    << mShapeSVGPathLineEdit
    << mShapeSizeCmbBx
    << mShapeSizeUnitWidget
    << mShapeSizeXSpnBx
    << mShapeSizeYSpnBx
    << mBackgroundOpacityWidget
    << mShapeTypeCmbBx
    << mZIndexSpinBox
    << spinBufferSize
    << wrapCharacterEdit
    << mAutoWrapLengthSpinBox
    << mAutoWrapTypeComboBox
    << mCentroidRadioVisible
    << mCentroidRadioWhole
    << mDirectSymbRadioBtnAbove
    << mDirectSymbRadioBtnBelow
    << mDirectSymbRadioBtnLR
    << mUpsidedownRadioAll
    << mUpsidedownRadioDefined
    << mUpsidedownRadioOff
    << mPlacementModeComboBox
    << mFieldExpressionWidget
    << mCheckBoxSubstituteText
    << mGeometryGeneratorGroupBox
    << mGeometryGenerator
    << mGeometryGeneratorType
    << mBackgroundMarkerSymbolButton
    << mBackgroundFillSymbolButton
    << mCalloutsDrawCheckBox
    << mCalloutStyleComboBox
    << mKerningCheckBox
    << mEnableMaskChkBx
    << mMaskJoinStyleComboBox
    << mMaskBufferSizeSpinBox
    << mMaskOpacityWidget
    << mCheckAllowLabelsOutsidePolygons
    << mHtmlFormattingCheckBox
    << mPrioritizationComboBox
    << mComboCurvedLabelMode
    << mTabDistanceUnitWidget
    << mTabStopDistanceSpin
    << mChkNoDuplicates
    << mCheckWhitespaceIsNotACollision;
 
  connectValueChanged( widgets );
 
  connect( mQuadrantBtnGrp, qOverload<QAbstractButton *>( &QButtonGroup::buttonClicked ), this, &QgsTextFormatWidget::updatePreview );
 
  connect( mBufferDrawDDBtn, &QgsPropertyOverrideButton::activated, this, &QgsTextFormatWidget::updateBufferFrameStatus );
  connect( mBufferDrawChkBx, &QCheckBox::stateChanged, this, [this]( int ) { updateBufferFrameStatus(); } );
  connect( mShapeDrawDDBtn, &QgsPropertyOverrideButton::activated, this, &QgsTextFormatWidget::updateShapeFrameStatus );
  connect( mShapeDrawChkBx, &QCheckBox::stateChanged, this, [this]( int ) { updateShapeFrameStatus(); } );
  connect( mShadowDrawDDBtn, &QgsPropertyOverrideButton::activated, this, &QgsTextFormatWidget::updateShadowFrameStatus );
  connect( mShadowDrawChkBx, &QCheckBox::stateChanged, this, [this]( int ) { updateShadowFrameStatus(); } );
  connect( mCalloutDrawDDBtn, &QgsPropertyOverrideButton::changed, this, &QgsTextFormatWidget::updateCalloutFrameStatus );
  connect( mCalloutsDrawCheckBox, &QCheckBox::stateChanged, this, [this]( int ) { updateCalloutFrameStatus(); } );
 
  mGeometryGeneratorType->addItem( QgsIconUtils::iconForWkbType( Qgis::WkbType::Polygon ), tr( "Polygon / MultiPolygon" ), static_cast<int>( Qgis::GeometryType::Polygon ) );
  mGeometryGeneratorType->addItem( QgsIconUtils::iconForWkbType( Qgis::WkbType::LineString ), tr( "LineString / MultiLineString" ), static_cast<int>( Qgis::GeometryType::Line ) );
  mGeometryGeneratorType->addItem( QgsIconUtils::iconForWkbType( Qgis::WkbType::Point ), tr( "Point / MultiPoint" ), static_cast<int>( Qgis::GeometryType::Point ) );
 
  // set correct initial tab to match displayed setting page
  whileBlocking( mOptionsTab )->setCurrentIndex( mLabelStackedWidget->currentIndex() );
  mOptionsTab->tabBar()->setUsesScrollButtons( true );
 
 
  if ( mMapCanvas )
  {
    lblFontPreview->setMapUnits( mMapCanvas->mapSettings().mapUnits() );
    mPreviewScaleComboBox->setScale( mMapCanvas->mapSettings().scale() );
  }
 
  mTextFormatsListWidget->setStyle( QgsStyle::defaultStyle() );
  mTextFormatsListWidget->setEntityType( QgsStyle::TextFormatEntity );
  connect( mTextFormatsListWidget, &QgsStyleItemsListWidget::selectionChangedWithStylePath, this, &QgsTextFormatWidget::setFormatFromStyle );
  connect( mTextFormatsListWidget, &QgsStyleItemsListWidget::saveEntity, this, &QgsTextFormatWidget::saveFormat );
}
 
void QgsTextFormatWidget::setWidgetMode( QgsTextFormatWidget::Mode mode )
{
  mWidgetMode = mode;
  switch ( mode )
  {
    case Labeling:
      setPropertyOverrideButtonsVisible( true );
      mTextFormatsListWidget->setEntityTypes( QList<QgsStyle::StyleEntity>() << QgsStyle::TextFormatEntity << QgsStyle::LabelSettingsEntity );
      mTextOrientationComboBox->addItem( tr( "Rotation-based" ), static_cast<int>( Qgis::TextOrientation::RotationBased ) );
      break;
 
    case Text:
    {
      const int prevIndex = mOptionsTab->currentIndex();
      setPropertyOverrideButtonsVisible( true );
      delete mRenderingItem;
      mRenderingItem = nullptr;
      delete mPlacementItem;
      mPlacementItem = nullptr;
      delete mCalloutItem;
      mCalloutItem = nullptr;
      delete mMaskItem;
      mMaskItem = nullptr;
      mOptionsTab->removeTab( mOptionsTab->indexOf( renderingTab ) );
      mOptionsTab->removeTab( mOptionsTab->indexOf( placementTab ) );
      mOptionsTab->removeTab( mOptionsTab->indexOf( calloutsTab ) );
      mOptionsTab->removeTab( mOptionsTab->indexOf( maskTab ) );
      mLabelStackedWidget->removeWidget( mLabelPage_Rendering );
      mLabelStackedWidget->removeWidget( mLabelPage_Callouts );
      mLabelStackedWidget->removeWidget( mLabelPage_Mask );
      mLabelStackedWidget->removeWidget( mLabelPage_Placement );
      switch ( prevIndex )
      {
        case 0:
        case 1:
        case 2:
          break;
 
        case 4: // background - account for removed mask tab
        case 5: // shadow
          mLabelStackedWidget->setCurrentIndex( prevIndex - 1 );
          mOptionsTab->setCurrentIndex( prevIndex - 1 );
          break;
 
        case 3: // mask
        case 6: // callouts
        case 7: // placement
        case 8: // rendering
          mLabelStackedWidget->setCurrentIndex( 0 );
          mOptionsTab->setCurrentIndex( 0 );
          break;
      }
 
      mStackedWidgetLabelWith->hide();
      mDirectSymbolsFrame->hide();
      mFormatNumFrame->hide();
      mFormatNumChkBx->hide();
      mFormatNumDDBtn->hide();
      mCheckBoxSubstituteText->hide();
      mToolButtonConfigureSubstitutes->hide();
      mLabelWrapOnCharacter->hide();
      wrapCharacterEdit->hide();
      mWrapCharDDBtn->hide();
      mLabelWrapLinesTo->hide();
      mAutoWrapLengthSpinBox->hide();
      mAutoWrapLengthDDBtn->hide();
      mAutoWrapTypeComboBox->hide();
      mFontMultiLineLabel->hide();
      mFontMultiLineAlignComboBox->hide();
      mFontMultiLineAlignDDBtn->hide();
 
      mTextOrientationComboBox->removeItem( mTextOrientationComboBox->findData( static_cast<int>( Qgis::TextOrientation::RotationBased ) ) );
      break;
    }
  }
}
 
void QgsTextFormatWidget::setPropertyOverrideButtonsVisible( bool visible )
{
  const QList<QgsPropertyOverrideButton *> buttons = findChildren<QgsPropertyOverrideButton *>();
  for ( QgsPropertyOverrideButton *button : buttons )
  {
    button->setVisible( visible );
  }
}
 
void QgsTextFormatWidget::setDockMode( bool enabled )
{
  mOptionsTab->setVisible( enabled );
  if ( int tabIndex = mOptionsTab->indexOf( textTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Text" ) );
  if ( int tabIndex = mOptionsTab->indexOf( formattingTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Formatting" ) );
  if ( int tabIndex = mOptionsTab->indexOf( bufferTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Buffer" ) );
  if ( int tabIndex = mOptionsTab->indexOf( maskTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Mask" ) );
  if ( int tabIndex = mOptionsTab->indexOf( backgroundTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Background" ) );
  if ( int tabIndex = mOptionsTab->indexOf( shadowTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Shadow" ) );
  if ( int tabIndex = mOptionsTab->indexOf( calloutsTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Callouts" ) );
  if ( int tabIndex = mOptionsTab->indexOf( placementTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Placement" ) );
  if ( int tabIndex = mOptionsTab->indexOf( renderingTab ); tabIndex >= 0 )
    mOptionsTab->setTabToolTip( tabIndex, tr( "Rendering" ) );
 
  mLabelingOptionsListFrame->setVisible( !enabled );
  groupBox_mPreview->setVisible( !enabled );
  mDockMode = enabled;
}
 
void QgsTextFormatWidget::connectValueChanged( const QList<QWidget *> &widgets )
{
  const auto constWidgets = widgets;
  for ( QWidget *widget : constWidgets )
  {
    if ( QgsSymbolButton *w = qobject_cast<QgsSymbolButton *>( widget ) )
    {
      connect( w, &QgsSymbolButton::changed, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QgsFieldExpressionWidget *w = qobject_cast<QgsFieldExpressionWidget *>( widget ) )
    {
      connect( w, qOverload<const QString &>( &QgsFieldExpressionWidget::fieldChanged ), this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QgsOpacityWidget *w = qobject_cast<QgsOpacityWidget *>( widget ) )
    {
      connect( w, &QgsOpacityWidget::opacityChanged, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QgsScaleWidget *w = qobject_cast<QgsScaleWidget *>( widget ) )
    {
      connect( w, &QgsScaleWidget::scaleChanged, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QgsUnitSelectionWidget *w = qobject_cast<QgsUnitSelectionWidget *>( widget ) )
    {
      connect( w, &QgsUnitSelectionWidget::changed, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QComboBox *w = qobject_cast<QComboBox *>( widget ) )
    {
      connect( w, qOverload<int>( &QComboBox::currentIndexChanged ), this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QSpinBox *w = qobject_cast<QSpinBox *>( widget ) )
    {
      connect( w, qOverload<int>( &QSpinBox::valueChanged ), this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QDoubleSpinBox *w = qobject_cast<QDoubleSpinBox *>( widget ) )
    {
      connect( w, qOverload<double>( &QDoubleSpinBox::valueChanged ), this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QgsColorButton *w = qobject_cast<QgsColorButton *>( widget ) )
    {
      connect( w, &QgsColorButton::colorChanged, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QCheckBox *w = qobject_cast<QCheckBox *>( widget ) )
    {
      connect( w, &QCheckBox::toggled, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QRadioButton *w = qobject_cast<QRadioButton *>( widget ) )
    {
      connect( w, &QRadioButton::toggled, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QLineEdit *w = qobject_cast<QLineEdit *>( widget ) )
    {
      connect( w, &QLineEdit::textEdited, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QSlider *w = qobject_cast<QSlider *>( widget ) )
    {
      connect( w, &QSlider::valueChanged, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QGroupBox *w = qobject_cast<QGroupBox *>( widget ) )
    {
      connect( w, &QGroupBox::toggled, this, &QgsTextFormatWidget::updatePreview );
    }
    else if ( QgsCodeEditorExpression *w = qobject_cast<QgsCodeEditorExpression *>( widget ) )
    {
      connect( w, &QgsCodeEditorExpression::textChanged, this, &QgsTextFormatWidget::updatePreview );
    }
    else
    {
      QgsLogger::warning( u"Could not create connection for widget %1"_s.arg( widget->objectName() ) );
    }
  }
}
 
void QgsTextFormatWidget::populateDataDefinedButtons()
{
  // text style
  registerDataDefinedButton( mFontDDBtn, QgsPalLayerSettings::Property::Family );
  registerDataDefinedButton( mFontStyleDDBtn, QgsPalLayerSettings::Property::FontStyle );
  registerDataDefinedButton( mFontUnderlineDDBtn, QgsPalLayerSettings::Property::Underline );
  registerDataDefinedButton( mFontStrikeoutDDBtn, QgsPalLayerSettings::Property::Strikeout );
  registerDataDefinedButton( mFontBoldDDBtn, QgsPalLayerSettings::Property::Bold );
  registerDataDefinedButton( mFontItalicDDBtn, QgsPalLayerSettings::Property::Italic );
  registerDataDefinedButton( mFontSizeDDBtn, QgsPalLayerSettings::Property::Size );
  registerDataDefinedButton( mFontUnitsDDBtn, QgsPalLayerSettings::Property::FontSizeUnit );
  registerDataDefinedButton( mFontColorDDBtn, QgsPalLayerSettings::Property::Color );
  registerDataDefinedButton( mFontOpacityDDBtn, QgsPalLayerSettings::Property::FontOpacity );
  registerDataDefinedButton( mFontCaseDDBtn, QgsPalLayerSettings::Property::FontCase );
  registerDataDefinedButton( mFontLetterSpacingDDBtn, QgsPalLayerSettings::Property::FontLetterSpacing );
  registerDataDefinedButton( mFontWordSpacingDDBtn, QgsPalLayerSettings::Property::FontWordSpacing );
  registerDataDefinedButton( mFontBlendModeDDBtn, QgsPalLayerSettings::Property::FontBlendMode );
  registerDataDefinedButton( mFontStretchDDBtn, QgsPalLayerSettings::Property::FontStretchFactor );
  registerDataDefinedButton( mTabDistanceDDBtn, QgsPalLayerSettings::Property::TabStopDistance );
 
  // text formatting
  registerDataDefinedButton( mWrapCharDDBtn, QgsPalLayerSettings::Property::MultiLineWrapChar );
  registerDataDefinedButton( mAutoWrapLengthDDBtn, QgsPalLayerSettings::Property::AutoWrapLength );
  registerDataDefinedButton( mFontLineHeightDDBtn, QgsPalLayerSettings::Property::MultiLineHeight );
  registerDataDefinedButton( mFontMultiLineAlignDDBtn, QgsPalLayerSettings::Property::MultiLineAlignment );
  registerDataDefinedButton( mTextOrientationDDBtn, QgsPalLayerSettings::Property::TextOrientation );
 
  registerDataDefinedButton( mDirectSymbDDBtn, QgsPalLayerSettings::Property::DirSymbDraw );
  mDirectSymbDDBtn->registerCheckedWidget( mDirectSymbChkBx );
  registerDataDefinedButton( mDirectSymbLeftDDBtn, QgsPalLayerSettings::Property::DirSymbLeft );
  registerDataDefinedButton( mDirectSymbRightDDBtn, QgsPalLayerSettings::Property::DirSymbRight );
 
  registerDataDefinedButton( mDirectSymbPlacementDDBtn, QgsPalLayerSettings::Property::DirSymbPlacement );
  registerDataDefinedButton( mDirectSymbRevDDBtn, QgsPalLayerSettings::Property::DirSymbReverse );
 
  registerDataDefinedButton( mFormatNumDDBtn, QgsPalLayerSettings::Property::NumFormat );
  mFormatNumDDBtn->registerCheckedWidget( mFormatNumChkBx );
  registerDataDefinedButton( mFormatNumDecimalsDDBtn, QgsPalLayerSettings::Property::NumDecimals );
  registerDataDefinedButton( mFormatNumPlusSignDDBtn, QgsPalLayerSettings::Property::NumPlusSign );
 
  // text buffer
  registerDataDefinedButton( mBufferDrawDDBtn, QgsPalLayerSettings::Property::BufferDraw );
  registerDataDefinedButton( mBufferSizeDDBtn, QgsPalLayerSettings::Property::BufferSize );
  registerDataDefinedButton( mBufferUnitsDDBtn, QgsPalLayerSettings::Property::BufferUnit );
  registerDataDefinedButton( mBufferColorDDBtn, QgsPalLayerSettings::Property::BufferColor );
  registerDataDefinedButton( mBufferOpacityDDBtn, QgsPalLayerSettings::Property::BufferOpacity );
  registerDataDefinedButton( mBufferJoinStyleDDBtn, QgsPalLayerSettings::Property::BufferJoinStyle );
  registerDataDefinedButton( mBufferBlendModeDDBtn, QgsPalLayerSettings::Property::BufferBlendMode );
 
  // mask
  registerDataDefinedButton( mEnableMaskDDBtn, QgsPalLayerSettings::Property::MaskEnabled );
  mEnableMaskDDBtn->registerCheckedWidget( mEnableMaskChkBx );
  registerDataDefinedButton( mMaskBufferSizeDDBtn, QgsPalLayerSettings::Property::MaskBufferSize );
  registerDataDefinedButton( mMaskBufferUnitsDDBtn, QgsPalLayerSettings::Property::MaskBufferUnit );
  registerDataDefinedButton( mMaskOpacityDDBtn, QgsPalLayerSettings::Property::MaskOpacity );
  registerDataDefinedButton( mMaskJoinStyleDDBtn, QgsPalLayerSettings::Property::MaskJoinStyle );
 
  // background
  registerDataDefinedButton( mShapeDrawDDBtn, QgsPalLayerSettings::Property::ShapeDraw );
  mShapeDrawDDBtn->registerCheckedWidget( mShapeDrawChkBx );
  registerDataDefinedButton( mShapeTypeDDBtn, QgsPalLayerSettings::Property::ShapeKind );
  registerDataDefinedButton( mShapeSVGPathDDBtn, QgsPalLayerSettings::Property::ShapeSVGFile );
  registerDataDefinedButton( mShapeSizeTypeDDBtn, QgsPalLayerSettings::Property::ShapeSizeType );
  registerDataDefinedButton( mShapeSizeXDDBtn, QgsPalLayerSettings::Property::ShapeSizeX );
  registerDataDefinedButton( mShapeSizeYDDBtn, QgsPalLayerSettings::Property::ShapeSizeY );
  registerDataDefinedButton( mShapeSizeUnitsDDBtn, QgsPalLayerSettings::Property::ShapeSizeUnits );
  registerDataDefinedButton( mShapeRotationTypeDDBtn, QgsPalLayerSettings::Property::ShapeRotationType );
  registerDataDefinedButton( mShapeRotationDDBtn, QgsPalLayerSettings::Property::ShapeRotation );
  registerDataDefinedButton( mShapeOffsetDDBtn, QgsPalLayerSettings::Property::ShapeOffset );
  registerDataDefinedButton( mShapeOffsetUnitsDDBtn, QgsPalLayerSettings::Property::ShapeOffsetUnits );
  registerDataDefinedButton( mShapeRadiusDDBtn, QgsPalLayerSettings::Property::ShapeRadii );
  registerDataDefinedButton( mShapeRadiusUnitsDDBtn, QgsPalLayerSettings::Property::ShapeRadiiUnits );
  registerDataDefinedButton( mShapeOpacityDDBtn, QgsPalLayerSettings::Property::ShapeOpacity );
  registerDataDefinedButton( mShapeBlendModeDDBtn, QgsPalLayerSettings::Property::ShapeBlendMode );
  registerDataDefinedButton( mShapeFillColorDDBtn, QgsPalLayerSettings::Property::ShapeFillColor );
  registerDataDefinedButton( mShapeStrokeColorDDBtn, QgsPalLayerSettings::Property::ShapeStrokeColor );
  registerDataDefinedButton( mShapeStrokeWidthDDBtn, QgsPalLayerSettings::Property::ShapeStrokeWidth );
  registerDataDefinedButton( mShapeStrokeUnitsDDBtn, QgsPalLayerSettings::Property::ShapeStrokeWidthUnits );
 
  // drop shadows
  registerDataDefinedButton( mShadowDrawDDBtn, QgsPalLayerSettings::Property::ShadowDraw );
  mShadowDrawDDBtn->registerCheckedWidget( mShadowDrawChkBx );
  registerDataDefinedButton( mShadowUnderDDBtn, QgsPalLayerSettings::Property::ShadowUnder );
  registerDataDefinedButton( mShadowOffsetAngleDDBtn, QgsPalLayerSettings::Property::ShadowOffsetAngle );
  registerDataDefinedButton( mShadowOffsetDDBtn, QgsPalLayerSettings::Property::ShadowOffsetDist );
  registerDataDefinedButton( mShadowOffsetUnitsDDBtn, QgsPalLayerSettings::Property::ShadowOffsetUnits );
  registerDataDefinedButton( mShadowRadiusDDBtn, QgsPalLayerSettings::Property::ShadowRadius );
  registerDataDefinedButton( mShadowRadiusUnitsDDBtn, QgsPalLayerSettings::Property::ShadowRadiusUnits );
  registerDataDefinedButton( mShadowOpacityDDBtn, QgsPalLayerSettings::Property::ShadowOpacity );
  registerDataDefinedButton( mShadowScaleDDBtn, QgsPalLayerSettings::Property::ShadowScale );
  registerDataDefinedButton( mShadowColorDDBtn, QgsPalLayerSettings::Property::ShadowColor );
  registerDataDefinedButton( mShadowBlendDDBtn, QgsPalLayerSettings::Property::ShadowBlendMode );
 
  // placement
  registerDataDefinedButton( mCentroidDDBtn, QgsPalLayerSettings::Property::CentroidWhole );
  registerDataDefinedButton( mPointQuadOffsetDDBtn, QgsPalLayerSettings::Property::OffsetQuad );
  registerDataDefinedButton( mPointPositionOrderDDBtn, QgsPalLayerSettings::Property::PredefinedPositionOrder );
  registerDataDefinedButton( mLinePlacementFlagsDDBtn, QgsPalLayerSettings::Property::LinePlacementOptions );
  registerDataDefinedButton( mPointOffsetDDBtn, QgsPalLayerSettings::Property::OffsetXY );
  registerDataDefinedButton( mPointOffsetUnitsDDBtn, QgsPalLayerSettings::Property::OffsetUnits );
  registerDataDefinedButton( mLineDistanceDDBtn, QgsPalLayerSettings::Property::LabelDistance );
  registerDataDefinedButton( mLineDistanceUnitDDBtn, QgsPalLayerSettings::Property::DistanceUnits );
  registerDataDefinedButton( mMaximumDistanceDDBtn, QgsPalLayerSettings::Property::MaximumDistance );
  registerDataDefinedButton( mPriorityDDBtn, QgsPalLayerSettings::Property::Priority );
  registerDataDefinedButton( mAllowOutsidePolygonsDDBtn, QgsPalLayerSettings::Property::PolygonLabelOutside );
  registerDataDefinedButton( mAllowInferiorPlacementDBtn, QgsPalLayerSettings::Property::AllowDegradedPlacement );
  registerDataDefinedButton( mOverlapHandlingDBtn, QgsPalLayerSettings::Property::OverlapHandling );
  registerDataDefinedButton( mCurvedLabelModeDDBtn, QgsPalLayerSettings::Property::CurvedLabelMode );
  registerDataDefinedButton( mWhitespaceDDBtn, QgsPalLayerSettings::Property::WhitespaceCollisionHandling );
 
  // TODO: is this necessary? maybe just use the data defined-only rotation?
  //mPointAngleDDBtn, QgsPalLayerSettings::OffsetRotation,
  //                        QgsPropertyOverrideButton::AnyType, QgsPropertyOverrideButton::double180RotDesc() );
  registerDataDefinedButton( mMaxCharAngleDDBtn, QgsPalLayerSettings::Property::CurvedCharAngleInOut );
  registerDataDefinedButton( mRepeatDistanceDDBtn, QgsPalLayerSettings::Property::RepeatDistance );
  registerDataDefinedButton( mRepeatDistanceUnitDDBtn, QgsPalLayerSettings::Property::RepeatDistanceUnit );
  registerDataDefinedButton( mOverrunDistanceDDBtn, QgsPalLayerSettings::Property::OverrunDistance );
 
  registerDataDefinedButton( mLabelMarginDDBtn, QgsPalLayerSettings::Property::LabelMarginDistance );
 
  // data defined-only
  registerDataDefinedButton( mCoordXDDBtn, QgsPalLayerSettings::Property::PositionX );
  registerDataDefinedButton( mCoordYDDBtn, QgsPalLayerSettings::Property::PositionY );
  registerDataDefinedButton( mCoordPointDDBtn, QgsPalLayerSettings::Property::PositionPoint );
  registerDataDefinedButton( mCoordAlignmentHDDBtn, QgsPalLayerSettings::Property::Hali );
  registerDataDefinedButton( mCoordAlignmentVDDBtn, QgsPalLayerSettings::Property::Vali );
  registerDataDefinedButton( mCoordRotationDDBtn, QgsPalLayerSettings::Property::LabelRotation );
 
  updateDataDefinedAlignment();
 
  // rendering
  const QString ddScaleVisInfo = tr(
    "Value &lt; 0 represents a scale closer than 1:1, e.g. -10 = 10:1<br>"
    "Value of 0 disables the specific limit."
  );
  registerDataDefinedButton( mScaleBasedVisibilityDDBtn, QgsPalLayerSettings::Property::ScaleVisibility );
  mScaleBasedVisibilityDDBtn->registerCheckedWidget( mScaleBasedVisibilityChkBx );
  registerDataDefinedButton( mScaleBasedVisibilityMinDDBtn, QgsPalLayerSettings::Property::MinimumScale );
  mScaleBasedVisibilityMinDDBtn->setUsageInfo( ddScaleVisInfo );
  registerDataDefinedButton( mScaleBasedVisibilityMaxDDBtn, QgsPalLayerSettings::Property::MaximumScale );
  mScaleBasedVisibilityMaxDDBtn->setUsageInfo( ddScaleVisInfo );
 
  // use either global scales or project scales
  if ( QgsProject::instance()->viewSettings()->useProjectScales() )
  {
    const QVector<double> scales = QgsProject::instance()->viewSettings()->mapScales();
    mMinScaleWidget->setPredefinedScales( scales );
    mMaxScaleWidget->setPredefinedScales( scales );
  }
  else
  {
    // use global scales
    mMinScaleWidget->updateScales();
    mMaxScaleWidget->updateScales();
  }
 
  registerDataDefinedButton( mFontLimitPixelDDBtn, QgsPalLayerSettings::Property::FontLimitPixel );
  mFontLimitPixelDDBtn->registerCheckedWidget( mFontLimitPixelChkBox );
  registerDataDefinedButton( mFontMinPixelDDBtn, QgsPalLayerSettings::Property::FontMinPixel );
  registerDataDefinedButton( mFontMaxPixelDDBtn, QgsPalLayerSettings::Property::FontMaxPixel );
 
  registerDataDefinedButton( mShowLabelDDBtn, QgsPalLayerSettings::Property::Show );
 
  registerDataDefinedButton( mAlwaysShowDDBtn, QgsPalLayerSettings::Property::AlwaysShow );
 
  registerDataDefinedButton( mIsObstacleDDBtn, QgsPalLayerSettings::Property::IsObstacle );
  registerDataDefinedButton( mZIndexDDBtn, QgsPalLayerSettings::Property::ZIndex );
 
  registerDataDefinedButton( mCalloutDrawDDBtn, QgsPalLayerSettings::Property::CalloutDraw );
 
  registerDataDefinedButton( mLabelAllPartsDDBtn, QgsPalLayerSettings::Property::LabelAllParts );
 
  registerDataDefinedButton( mNoDuplicatesDDBtn, QgsPalLayerSettings::Property::RemoveDuplicateLabels );
}
 
void QgsTextFormatWidget::registerDataDefinedButton( QgsPropertyOverrideButton *button, QgsPalLayerSettings::Property key )
{
  QgsVectorLayer *vLayer = qobject_cast<QgsVectorLayer *>( mLayer );
 
  button->init( static_cast<int>( key ), mDataDefinedProperties, QgsPalLayerSettings::propertyDefinitions(), vLayer, true );
  if ( !mButtons.contains( key ) )
  {
    connect( button, &QgsPropertyOverrideButton::changed, this, &QgsTextFormatWidget::updateProperty );
    connect( button, &QgsPropertyOverrideButton::createAuxiliaryField, this, &QgsTextFormatWidget::createAuxiliaryField );
    button->registerExpressionContextGenerator( this );
    mButtons[key] = button;
  }
}
 
void QgsTextFormatWidget::updateWidgetForFormat( const QgsTextFormat &format )
{
  const QgsTextBufferSettings buffer = format.buffer();
  const QgsTextMaskSettings mask = format.mask();
  const QgsTextBackgroundSettings background = format.background();
  const QgsTextShadowSettings shadow = format.shadow();
 
  if ( mWidgetMode != Labeling )
  {
    mDataDefinedProperties = format.dataDefinedProperties();
  }
 
  mTabPositions = format.tabPositions();
  mTabStopDistanceSpin->setEnabled( mTabPositions.empty() );
 
  // buffer
  mBufferDrawChkBx->setChecked( buffer.enabled() );
  mBufferFrame->setEnabled( buffer.enabled() );
  spinBufferSize->setValue( buffer.size() );
  mBufferUnitWidget->setUnit( buffer.sizeUnit() );
  mBufferUnitWidget->setMapUnitScale( buffer.sizeMapUnitScale() );
  btnBufferColor->setColor( buffer.color() );
  mBufferOpacityWidget->setOpacity( buffer.opacity() );
  mBufferJoinStyleComboBox->setPenJoinStyle( buffer.joinStyle() );
  mBufferTranspFillChbx->setChecked( buffer.fillBufferInterior() );
  comboBufferBlendMode->setBlendMode( buffer.blendMode() );
  if ( auto *lPaintEffect = buffer.paintEffect() )
    mBufferEffect.reset( lPaintEffect->clone() );
  else
  {
    mBufferEffect.reset( QgsPaintEffectRegistry::defaultStack() );
    mBufferEffect->setEnabled( false );
  }
  mBufferEffectWidget->setPaintEffect( mBufferEffect.get() );
 
  // mask
  mMaskedSymbolLayers = mask.maskedSymbolLayers();
  mEnableMaskChkBx->setChecked( mask.enabled() );
  mMaskBufferSizeSpinBox->setValue( mask.size() );
  mMaskBufferUnitWidget->setUnit( mask.sizeUnit() );
  mMaskBufferUnitWidget->setMapUnitScale( mask.sizeMapUnitScale() );
  mMaskOpacityWidget->setOpacity( mask.opacity() );
  mMaskJoinStyleComboBox->setPenJoinStyle( mask.joinStyle() );
  if ( auto *lPaintEffect = mask.paintEffect() )
    mMaskEffect.reset( lPaintEffect->clone() );
  else
  {
    mMaskEffect.reset( QgsPaintEffectRegistry::defaultStack() );
    mMaskEffect->setEnabled( false );
  }
  mMaskEffectWidget->setPaintEffect( mMaskEffect.get() );
 
  mFontSizeUnitWidget->setUnit( format.sizeUnit() );
  mFontSizeUnitWidget->setMapUnitScale( format.sizeMapUnitScale() );
  mRefFont = format.font();
  mFontSizeSpinBox->setValue( format.size() );
  btnTextColor->setColor( format.color() );
  whileBlocking( mSpinStretch )->setValue( format.stretchFactor() );
  mTextOpacityWidget->setOpacity( format.opacity() );
  comboBlendMode->setBlendMode( format.blendMode() );
  mTextOrientationComboBox->setCurrentIndex( mTextOrientationComboBox->findData( static_cast<int>( format.orientation() ) ) );
  mHtmlFormattingCheckBox->setChecked( format.allowHtmlFormatting() );
 
  mFontWordSpacingSpinBox->setValue( format.font().wordSpacing() );
  mFontLetterSpacingSpinBox->setValue( format.font().letterSpacing() );
  whileBlocking( mKerningCheckBox )->setChecked( format.font().kerning() );
 
  mTabDistanceUnitWidget->setUnit( format.tabStopDistanceUnit() );
  mTabDistanceUnitWidget->setMapUnitScale( format.tabStopDistanceMapUnitScale() );
  whileBlocking( mTabStopDistanceSpin )->setValue( format.tabStopDistanceUnit() == Qgis::RenderUnit::Percentage ? ( format.tabStopDistance() * 100 ) : format.tabStopDistance() );
 
  whileBlocking( mFontCapitalsComboBox )->setCurrentIndex( mFontCapitalsComboBox->findData( static_cast<int>( format.capitalization() ) ) );
  QgsFontUtils::updateFontViaStyle( mRefFont, format.namedStyle() );
  updateFont( mRefFont );
 
  // show 'font not found' if substitution has occurred (should come after updateFont())
  mFontMissingLabel->setVisible( !format.fontFound() );
  if ( !format.fontFound() )
  {
    const QString missingTxt = tr( "%1 not found. Default substituted." );
    QString txtPrepend = tr( "Chosen font" );
    if ( !format.resolvedFontFamily().isEmpty() )
    {
      txtPrepend = u"'%1'"_s.arg( format.resolvedFontFamily() );
    }
    mFontMissingLabel->setText( missingTxt.arg( txtPrepend ) );
 
    // ensure user is sent to 'Text style' section to see notice
    mLabelingOptionsListWidget->setCurrentItem( mTextItem );
    whileBlocking( mOptionsTab )->setCurrentIndex( mOptionsTab->indexOf( textTab ) );
  }
  mFontLineHeightSpinBox->setValue( format.lineHeightUnit() == Qgis::RenderUnit::Percentage ? ( format.lineHeight() * 100 ) : format.lineHeight() );
  mLineHeightUnitWidget->setUnit( format.lineHeightUnit() );
 
  // shape background
  mShapeDrawChkBx->setChecked( background.enabled() );
  mShapeFrame->setEnabled( background.enabled() );
  mShapeTypeCmbBx->blockSignals( true );
  mShapeTypeCmbBx->setCurrentIndex( mShapeTypeCmbBx->findData( background.type() ) );
  mShapeTypeCmbBx->blockSignals( false );
  updateAvailableShadowPositions();
  mShapeSVGPathLineEdit->setText( background.svgFile() );
 
  mShapeSizeCmbBx->setCurrentIndex( background.sizeType() );
  mShapeSizeXSpnBx->setValue( background.size().width() );
  mShapeSizeYSpnBx->setValue( background.size().height() );
  mShapeSizeUnitWidget->setUnit( background.sizeUnit() );
  mShapeSizeUnitWidget->setMapUnitScale( background.sizeMapUnitScale() );
  mShapeRotationCmbBx->setCurrentIndex( background.rotationType() );
  mShapeRotationDblSpnBx->setEnabled( background.rotationType() != QgsTextBackgroundSettings::RotationSync );
  mShapeRotationDDBtn->setEnabled( background.rotationType() != QgsTextBackgroundSettings::RotationSync );
  mShapeRotationDblSpnBx->setValue( background.rotation() );
  mShapeOffsetXSpnBx->setValue( background.offset().x() );
  mShapeOffsetYSpnBx->setValue( background.offset().y() );
  mShapeOffsetUnitWidget->setUnit( background.offsetUnit() );
  mShapeOffsetUnitWidget->setMapUnitScale( background.offsetMapUnitScale() );
  mShapeRadiusXDbSpnBx->setValue( background.radii().width() );
  mShapeRadiusYDbSpnBx->setValue( background.radii().height() );
  mShapeRadiusUnitWidget->setUnit( background.radiiUnit() );
  mShapeRadiusUnitWidget->setMapUnitScale( background.radiiMapUnitScale() );
 
  mShapeFillColorBtn->setColor( background.fillColor() );
  mShapeStrokeColorBtn->setColor( background.strokeColor() );
  mShapeStrokeWidthSpnBx->setValue( background.strokeWidth() );
  mShapeStrokeWidthUnitWidget->setUnit( background.strokeWidthUnit() );
  mShapeStrokeWidthUnitWidget->setMapUnitScale( background.strokeWidthMapUnitScale() );
 
  mBackgroundOpacityWidget->setOpacity( background.opacity() );
  mShapeBlendCmbBx->setBlendMode( background.blendMode() );
 
  mLoadSvgParams = false;
  mShapeTypeCmbBx_currentIndexChanged( background.type() ); // force update of shape background gui
 
  if ( auto *lPaintEffect = background.paintEffect() )
    mBackgroundEffect.reset( lPaintEffect->clone() );
  else
  {
    mBackgroundEffect.reset( QgsPaintEffectRegistry::defaultStack() );
    mBackgroundEffect->setEnabled( false );
  }
  mBackgroundEffectWidget->setPaintEffect( mBackgroundEffect.get() );
 
  mBackgroundMarkerSymbolButton->setSymbol( background.markerSymbol() ? background.markerSymbol()->clone() : QgsSymbol::defaultSymbol( Qgis::GeometryType::Point ) );
  mBackgroundFillSymbolButton->setSymbol( background.fillSymbol() ? background.fillSymbol()->clone() : QgsSymbol::defaultSymbol( Qgis::GeometryType::Polygon ) );
 
  // drop shadow
  mShadowDrawChkBx->setChecked( shadow.enabled() );
  mShadowFrame->setEnabled( shadow.enabled() );
  mShadowUnderCmbBx->setCurrentIndex( mShadowUnderCmbBx->findData( shadow.shadowPlacement() ) );
  mShadowOffsetAngleSpnBx->setValue( shadow.offsetAngle() );
  mShadowOffsetSpnBx->setValue( shadow.offsetDistance() );
  mShadowOffsetUnitWidget->setUnit( shadow.offsetUnit() );
  mShadowOffsetUnitWidget->setMapUnitScale( shadow.offsetMapUnitScale() );
  mShadowOffsetGlobalChkBx->setChecked( shadow.offsetGlobal() );
 
  mShadowRadiusDblSpnBx->setValue( shadow.blurRadius() );
  mShadowRadiusUnitWidget->setUnit( shadow.blurRadiusUnit() );
  mShadowRadiusUnitWidget->setMapUnitScale( shadow.blurRadiusMapUnitScale() );
  mShadowRadiusAlphaChkBx->setChecked( shadow.blurAlphaOnly() );
  mShadowOpacityWidget->setOpacity( shadow.opacity() );
  mShadowScaleSpnBx->setValue( shadow.scale() );
 
  mShadowColorBtn->setColor( shadow.color() );
  mShadowBlendCmbBx->setBlendMode( shadow.blendMode() );
 
  mPreviewBackgroundBtn->setColor( format.previewBackgroundColor() );
  mPreviewBackgroundBtn->setDefaultColor( format.previewBackgroundColor() );
  setPreviewBackground( format.previewBackgroundColor() );
 
  populateDataDefinedButtons();
}
 
QgsTextFormatWidget::~QgsTextFormatWidget()
{
  QgsSettings settings;
  settings.setValue( u"Windows/Labeling/FontPreviewSplitState"_s, mFontPreviewSplitter->saveState() );
  settings.setValue( u"Windows/Labeling/OptionsSplitState"_s, mLabelingOptionsSplitter->saveState() );
 
  int prevIndex = mLabelingOptionsListWidget->currentRow();
  if ( mWidgetMode == Text )
  {
    switch ( prevIndex )
    {
      case 3: // background - account for removed mask tab
      case 4: // shadow - account for removed mask tab
        prevIndex++;
        break;
    }
  }
 
  settings.setValue( u"Windows/Labeling/Tab"_s, prevIndex );
}
 
QgsTextFormat QgsTextFormatWidget::format( bool includeDataDefinedProperties ) const
{
  QgsTextFormat format;
  format.setColor( btnTextColor->color() );
  format.setFont( mRefFont );
  format.setSize( mFontSizeSpinBox->value() );
  format.setNamedStyle( mFontStyleComboBox->currentText() );
  format.setOpacity( mTextOpacityWidget->opacity() );
  format.setStretchFactor( mSpinStretch->value() );
  format.setBlendMode( comboBlendMode->blendMode() );
  format.setSizeUnit( mFontSizeUnitWidget->unit() );
  format.setSizeMapUnitScale( mFontSizeUnitWidget->getMapUnitScale() );
  format.setLineHeight( mLineHeightUnitWidget->unit() == Qgis::RenderUnit::Percentage ? ( mFontLineHeightSpinBox->value() / 100 ) : mFontLineHeightSpinBox->value() );
  format.setLineHeightUnit( mLineHeightUnitWidget->unit() );
  format.setPreviewBackgroundColor( mPreviewBackgroundColor );
  format.setOrientation( static_cast<Qgis::TextOrientation>( mTextOrientationComboBox->currentData().toInt() ) );
  format.setAllowHtmlFormatting( mHtmlFormattingCheckBox->isChecked() );
  format.setCapitalization( static_cast<Qgis::Capitalization>( mFontCapitalsComboBox->currentData().toInt() ) );
  format.setTabStopDistance( mTabDistanceUnitWidget->unit() == Qgis::RenderUnit::Percentage ? ( mTabStopDistanceSpin->value() / 100 ) : mTabStopDistanceSpin->value() );
  format.setTabStopDistanceUnit( mTabDistanceUnitWidget->unit() );
  format.setTabStopDistanceMapUnitScale( mTabDistanceUnitWidget->getMapUnitScale() );
  format.setTabPositions( mTabPositions );
 
  // buffer
  QgsTextBufferSettings buffer;
  buffer.setEnabled( mBufferDrawChkBx->isChecked() );
  buffer.setSize( spinBufferSize->value() );
  buffer.setColor( btnBufferColor->color() );
  buffer.setOpacity( mBufferOpacityWidget->opacity() );
  buffer.setSizeUnit( mBufferUnitWidget->unit() );
  buffer.setSizeMapUnitScale( mBufferUnitWidget->getMapUnitScale() );
  buffer.setJoinStyle( mBufferJoinStyleComboBox->penJoinStyle() );
  buffer.setFillBufferInterior( mBufferTranspFillChbx->isChecked() );
  buffer.setBlendMode( comboBufferBlendMode->blendMode() );
  if ( mBufferEffect && ( !QgsPaintEffectRegistry::isDefaultStack( mBufferEffect.get() ) || mBufferEffect->enabled() ) )
    buffer.setPaintEffect( mBufferEffect->clone() );
  else
    buffer.setPaintEffect( nullptr );
  format.setBuffer( buffer );
 
  // mask
  QgsTextMaskSettings mask;
  mask.setEnabled( mEnableMaskChkBx->isChecked() );
  mask.setSize( mMaskBufferSizeSpinBox->value() );
  mask.setOpacity( mMaskOpacityWidget->opacity() );
  mask.setSizeUnit( mMaskBufferUnitWidget->unit() );
  mask.setSizeMapUnitScale( mMaskBufferUnitWidget->getMapUnitScale() );
  mask.setJoinStyle( mMaskJoinStyleComboBox->penJoinStyle() );
  if ( mMaskEffect && ( !QgsPaintEffectRegistry::isDefaultStack( mMaskEffect.get() ) || mMaskEffect->enabled() ) )
    mask.setPaintEffect( mMaskEffect->clone() );
  else
    mask.setPaintEffect( nullptr );
  mask.setMaskedSymbolLayers( mMaskedSymbolLayers );
  format.setMask( mask );
 
  // shape background
  QgsTextBackgroundSettings background;
  background.setEnabled( mShapeDrawChkBx->isChecked() );
  background.setType( static_cast<QgsTextBackgroundSettings::ShapeType>( mShapeTypeCmbBx->currentData().toInt() ) );
  background.setSvgFile( mShapeSVGPathLineEdit->text() );
  background.setSizeType( static_cast<QgsTextBackgroundSettings::SizeType>( mShapeSizeCmbBx->currentIndex() ) );
  background.setSize( QSizeF( mShapeSizeXSpnBx->value(), mShapeSizeYSpnBx->value() ) );
  background.setSizeUnit( mShapeSizeUnitWidget->unit() );
  background.setSizeMapUnitScale( mShapeSizeUnitWidget->getMapUnitScale() );
  background.setRotationType( static_cast<QgsTextBackgroundSettings::RotationType>( mShapeRotationCmbBx->currentIndex() ) );
  background.setRotation( mShapeRotationDblSpnBx->value() );
  background.setOffset( QPointF( mShapeOffsetXSpnBx->value(), mShapeOffsetYSpnBx->value() ) );
  background.setOffsetUnit( mShapeOffsetUnitWidget->unit() );
  background.setOffsetMapUnitScale( mShapeOffsetUnitWidget->getMapUnitScale() );
  background.setRadii( QSizeF( mShapeRadiusXDbSpnBx->value(), mShapeRadiusYDbSpnBx->value() ) );
  background.setRadiiUnit( mShapeRadiusUnitWidget->unit() );
  background.setRadiiMapUnitScale( mShapeRadiusUnitWidget->getMapUnitScale() );
 
  background.setFillColor( mShapeFillColorBtn->color() );
  background.setStrokeColor( mShapeStrokeColorBtn->color() );
  background.setStrokeWidth( mShapeStrokeWidthSpnBx->value() );
  background.setStrokeWidthUnit( mShapeStrokeWidthUnitWidget->unit() );
  background.setStrokeWidthMapUnitScale( mShapeStrokeWidthUnitWidget->getMapUnitScale() );
  background.setOpacity( mBackgroundOpacityWidget->opacity() );
  background.setBlendMode( mShapeBlendCmbBx->blendMode() );
  if ( mBackgroundEffect && ( !QgsPaintEffectRegistry::isDefaultStack( mBackgroundEffect.get() ) || mBackgroundEffect->enabled() ) )
    background.setPaintEffect( mBackgroundEffect->clone() );
  else
    background.setPaintEffect( nullptr );
  background.setMarkerSymbol( mBackgroundMarkerSymbolButton->clonedSymbol<QgsMarkerSymbol>() );
  background.setFillSymbol( mBackgroundFillSymbolButton->clonedSymbol<QgsFillSymbol>() );
  format.setBackground( background );
 
  // drop shadow
  QgsTextShadowSettings shadow;
  shadow.setEnabled( mShadowDrawChkBx->isChecked() );
  shadow.setShadowPlacement( static_cast<QgsTextShadowSettings::ShadowPlacement>( mShadowUnderCmbBx->currentData().toInt() ) );
  shadow.setOffsetAngle( mShadowOffsetAngleSpnBx->value() );
  shadow.setOffsetDistance( mShadowOffsetSpnBx->value() );
  shadow.setOffsetUnit( mShadowOffsetUnitWidget->unit() );
  shadow.setOffsetMapUnitScale( mShadowOffsetUnitWidget->getMapUnitScale() );
  shadow.setOffsetGlobal( mShadowOffsetGlobalChkBx->isChecked() );
  shadow.setBlurRadius( mShadowRadiusDblSpnBx->value() );
  shadow.setBlurRadiusUnit( mShadowRadiusUnitWidget->unit() );
  shadow.setBlurRadiusMapUnitScale( mShadowRadiusUnitWidget->getMapUnitScale() );
  shadow.setBlurAlphaOnly( mShadowRadiusAlphaChkBx->isChecked() );
  shadow.setOpacity( mShadowOpacityWidget->opacity() );
  shadow.setScale( mShadowScaleSpnBx->value() );
  shadow.setColor( mShadowColorBtn->color() );
  shadow.setBlendMode( mShadowBlendCmbBx->blendMode() );
  format.setShadow( shadow );
 
  if ( includeDataDefinedProperties )
    format.setDataDefinedProperties( mDataDefinedProperties );
 
  return format;
}
 
void QgsTextFormatWidget::setFormat( const QgsTextFormat &format )
{
  if ( mWidgetMode != Labeling )
  {
    // we need to combine any data defined properties from the text format with existing ones from the label settings
    const QgsPropertyCollection formatProps = format.dataDefinedProperties();
    for ( const int key : formatProps.propertyKeys() )
    {
      if ( formatProps.isActive( key ) )
      {
        mDataDefinedProperties.setProperty( key, formatProps.property( key ) );
      }
    }
  }
 
  updateWidgetForFormat( format );
}
 
QgsSymbolWidgetContext QgsTextFormatWidget::context() const
{
  return mContext;
}
 
void QgsTextFormatWidget::deactivateField( QgsPalLayerSettings::Property key )
{
  if ( mButtons.contains( key ) )
  {
    QgsPropertyOverrideButton *button = mButtons[key];
    button->updateFieldLists();
    button->setToProperty( QgsProperty() );
    mDataDefinedProperties.setProperty( key, QgsProperty() );
  }
}
 
void QgsTextFormatWidget::optionsStackedWidget_CurrentChanged( int )
{
  mLabelingOptionsListWidget->blockSignals( true );
  QWidget *currentPage = mLabelStackedWidget->currentWidget();
  if ( currentPage == mLabelPage_Text )
    mLabelingOptionsListWidget->setCurrentItem( mTextItem );
  else if ( currentPage == mLabelPage_Formatting )
    mLabelingOptionsListWidget->setCurrentItem( mFormattingItem );
  else if ( currentPage == mLabelPage_Mask )
    mLabelingOptionsListWidget->setCurrentItem( mMaskItem );
  if ( currentPage == mLabelPage_Buffer )
    mLabelingOptionsListWidget->setCurrentItem( mBufferItem );
  if ( currentPage == mLabelPage_Background )
    mLabelingOptionsListWidget->setCurrentItem( mBackgroundItem );
  if ( currentPage == mLabelPage_Shadow )
    mLabelingOptionsListWidget->setCurrentItem( mShadowItem );
  if ( currentPage == mLabelPage_Callouts )
    mLabelingOptionsListWidget->setCurrentItem( mCalloutItem );
  if ( currentPage == mLabelPage_Rendering )
    mLabelingOptionsListWidget->setCurrentItem( mRenderingItem );
  if ( currentPage == mLabelPage_Placement )
    mLabelingOptionsListWidget->setCurrentItem( mPlacementItem );
  mLabelingOptionsListWidget->blockSignals( false );
}
 
void QgsTextFormatWidget::setContext( const QgsSymbolWidgetContext &context )
{
  mContext = context;
 
  if ( auto *lExpressionContext = mContext.expressionContext() )
  {
    mPreviewExpressionContext = *lExpressionContext;
    if ( mLayer )
      mPreviewExpressionContext.appendScope( QgsExpressionContextUtils::layerScope( mLayer ) );
  }
 
  const auto symbolButtonWidgets = findChildren<QgsSymbolButton *>();
  for ( QgsSymbolButton *symbolWidget : symbolButtonWidgets )
  {
    symbolWidget->setMapCanvas( mContext.mapCanvas() );
    symbolWidget->setMessageBar( mContext.messageBar() );
  }
}
 
void QgsTextFormatWidget::collapseSample( bool collapse )
{
  if ( collapse )
  {
    QList<int> splitSizes = mFontPreviewSplitter->sizes();
    if ( splitSizes[0] > groupBox_mPreview->height() )
    {
      const int delta = splitSizes[0] - groupBox_mPreview->height();
      splitSizes[0] -= delta;
      splitSizes[1] += delta;
      mFontPreviewSplitter->setSizes( splitSizes );
    }
  }
}
 
void QgsTextFormatWidget::changeTextColor( const QColor &color )
{
  Q_UNUSED( color )
  updatePreview();
}
 
void QgsTextFormatWidget::updateFont( const QFont &newFont )
{
  // update background reference font
  if ( newFont != mRefFont )
  {
    mRefFont = newFont;
  }
 
  // test if font is actually available
  // NOTE: QgsFontUtils::fontMatchOnSystem may fail here, just crosscheck family
  mFontMissingLabel->setVisible( !QgsFontUtils::fontFamilyMatchOnSystem( mRefFont.family() ) );
 
  QFont symbolFont = mRefFont;
  symbolFont.setPointSize( font().pointSize() );
  mDirectSymbLeftLineEdit->setFont( symbolFont );
  mDirectSymbRightLineEdit->setFont( symbolFont );
 
  blockFontChangeSignals( true );
  mFontFamilyCmbBx->setCurrentFont( symbolFont );
  populateFontStyleComboBox();
  mFontUnderlineBtn->setChecked( mRefFont.underline() );
  mFontStrikethroughBtn->setChecked( mRefFont.strikeOut() );
  mKerningCheckBox->setChecked( mRefFont.kerning() );
  blockFontChangeSignals( false );
 
  // update font name with font face
  //  font.setPixelSize( 24 );
 
  updatePreview();
}
 
void QgsTextFormatWidget::blockFontChangeSignals( bool blk )
{
  mFontFamilyCmbBx->blockSignals( blk );
  mFontStyleComboBox->blockSignals( blk );
  mFontCapitalsComboBox->blockSignals( blk );
  mFontUnderlineBtn->blockSignals( blk );
  mFontStrikethroughBtn->blockSignals( blk );
  mFontWordSpacingSpinBox->blockSignals( blk );
  mFontLetterSpacingSpinBox->blockSignals( blk );
  mKerningCheckBox->blockSignals( blk );
}
 
void QgsTextFormatWidget::updatePreview()
{
  // In dock mode we don't have a preview we
  // just let stuff know we have changed because
  // there might be live updates connected.
  if ( mDockMode )
  {
    emit widgetChanged();
    return;
  }
 
  scrollPreview();
  lblFontPreview->setFormat( format() );
}
 
void QgsTextFormatWidget::scrollPreview()
{
  scrollArea_mPreview->ensureVisible( 0, 0, 0, 0 );
}
 
void QgsTextFormatWidget::setPreviewBackground( const QColor &color )
{
  mPreviewBackgroundColor = color;
 
  scrollArea_mPreview->widget()->setStyleSheet( u"background: rgb(%1, %2, %3);"_s.arg( QString::number( color.red() ), QString::number( color.green() ), QString::number( color.blue() ) ) );
}
 
void QgsTextFormatWidget::changeBufferColor( const QColor &color )
{
  Q_UNUSED( color )
  updatePreview();
}
 
void QgsTextFormatWidget::updatePlacementWidgets()
{
  const Qgis::GeometryType currentGeometryType = labelGeometryType();
  bool showLineFrame = false;
  bool showCentroidFrame = false;
  bool showQuadrantFrame = false;
  bool showFixedQuadrantFrame = false;
  bool showPlacementPriorityFrame = false;
  bool showOffsetTypeFrame = false;
  bool showOffsetFrame = false;
  bool showDistanceFrame = false;
  bool showMaximumDistanceFrame = false;
  bool showPrioritizationFrame = false;
  bool showRotationFrame = false;
  bool showMaxCharAngleFrame = false;
  bool showCurvedLabelModeFrame = false;
  bool showWhitespaceCollisionFrame = false;
 
  const Qgis::LabelPlacement currentPlacement = static_cast<Qgis::LabelPlacement>( mPlacementModeComboBox->currentData().toInt() );
  const bool showPolygonPlacementOptions
    = ( currentGeometryType == Qgis::GeometryType::Polygon && currentPlacement != Qgis::LabelPlacement::Line && currentPlacement != Qgis::LabelPlacement::PerimeterCurved && currentPlacement != Qgis::LabelPlacement::OutsidePolygons );
 
  bool enableMultiLinesFrame = true;
 
  if ( currentPlacement == Qgis::LabelPlacement::AroundPoint && ( currentGeometryType == Qgis::GeometryType::Point || currentGeometryType == Qgis::GeometryType::Polygon ) )
  {
    showCentroidFrame = currentGeometryType == Qgis::GeometryType::Polygon;
    showDistanceFrame = true;
    mPlacementDistanceFrame->setEnabled( true );
    showMaximumDistanceFrame = true;
    //showRotationFrame = true; // TODO: uncomment when supported
    showQuadrantFrame = currentGeometryType == Qgis::GeometryType::Point;
  }
  else if ( currentPlacement == Qgis::LabelPlacement::OverPoint && ( currentGeometryType == Qgis::GeometryType::Point || currentGeometryType == Qgis::GeometryType::Polygon ) )
  {
    showCentroidFrame = currentGeometryType == Qgis::GeometryType::Polygon;
    showQuadrantFrame = true;
    showFixedQuadrantFrame = true;
    showOffsetFrame = true;
    showRotationFrame = true;
  }
  else if ( currentGeometryType == Qgis::GeometryType::Point && currentPlacement == Qgis::LabelPlacement::OrderedPositionsAroundPoint )
  {
    showDistanceFrame = true;
    showMaximumDistanceFrame = true;
    showPlacementPriorityFrame = true;
    showPrioritizationFrame = true;
    showOffsetTypeFrame = true;
  }
  else if ( ( currentGeometryType == Qgis::GeometryType::Line && currentPlacement == Qgis::LabelPlacement::Line )
            || ( currentGeometryType == Qgis::GeometryType::Polygon && currentPlacement == Qgis::LabelPlacement::Line )
            || ( currentGeometryType == Qgis::GeometryType::Line && currentPlacement == Qgis::LabelPlacement::Curved )
            || ( currentGeometryType == Qgis::GeometryType::Polygon && currentPlacement == Qgis::LabelPlacement::PerimeterCurved ) )
  {
    showLineFrame = true;
    showDistanceFrame = true;
    showCurvedLabelModeFrame = currentPlacement == Qgis::LabelPlacement::Curved || currentPlacement == Qgis::LabelPlacement::PerimeterCurved;
    showWhitespaceCollisionFrame = currentPlacement == Qgis::LabelPlacement::Curved || currentPlacement == Qgis::LabelPlacement::PerimeterCurved;
    //showRotationFrame = true; // TODO: uncomment when supported
 
    const bool offline = chkLineAbove->isChecked() || chkLineBelow->isChecked();
    chkLineOrientationDependent->setEnabled( offline );
    mPlacementDistanceFrame->setEnabled( offline );
 
    const bool isCurved = ( currentGeometryType == Qgis::GeometryType::Line && currentPlacement == Qgis::LabelPlacement::Curved )
                          || ( currentGeometryType == Qgis::GeometryType::Polygon && currentPlacement == Qgis::LabelPlacement::PerimeterCurved );
    showMaxCharAngleFrame = isCurved;
    // TODO: enable mMultiLinesFrame when supported for curved labels
    enableMultiLinesFrame = !isCurved;
  }
  else if ( currentGeometryType == Qgis::GeometryType::Polygon
            && ( currentPlacement == Qgis::LabelPlacement::OutsidePolygons || mCheckAllowLabelsOutsidePolygons->isChecked() || mAllowOutsidePolygonsDDBtn->isActive() ) )
  {
    showDistanceFrame = true;
    mPlacementDistanceFrame->setEnabled( true );
  }
 
  mPlacementLineFrame->setVisible( showLineFrame );
  mPlacementPolygonFrame->setVisible( showPolygonPlacementOptions );
  mPlacementCentroidFrame->setVisible( showCentroidFrame );
  mPlacementQuadrantFrame->setVisible( showQuadrantFrame );
  mPlacementFixedQuadrantFrame->setVisible( showFixedQuadrantFrame );
  mPlacementCartographicFrame->setVisible( showPlacementPriorityFrame );
  mPlacementOffsetFrame->setVisible( showOffsetFrame );
  mPlacementDistanceFrame->setVisible( showDistanceFrame );
  mPlacementMaximumDistanceFrame->setVisible( showMaximumDistanceFrame );
  mPlacementPrioritizationFrame->setVisible( showPrioritizationFrame );
  mPlacementOffsetTypeFrame->setVisible( showOffsetTypeFrame );
  mWhitespaceCollisionFrame->setVisible( showWhitespaceCollisionFrame );
  mPlacementRotationFrame->setVisible( showRotationFrame );
  mPlacementRepeatGroupBox->setVisible(
    currentGeometryType == Qgis::GeometryType::Line
    || ( currentGeometryType == Qgis::GeometryType::Polygon && ( currentPlacement == Qgis::LabelPlacement::Line || currentPlacement == Qgis::LabelPlacement::PerimeterCurved ) )
  );
  mPlacementOverrunGroupBox->setVisible( currentGeometryType == Qgis::GeometryType::Line && currentPlacement != Qgis::LabelPlacement::Horizontal );
  mLineAnchorGroupBox->setVisible( currentGeometryType == Qgis::GeometryType::Line || currentPlacement == Qgis::LabelPlacement::Line || currentPlacement == Qgis::LabelPlacement::PerimeterCurved );
  mPlacementMaxCharAngleFrame->setVisible( showMaxCharAngleFrame );
  mCurvedLabelModeFrame->setVisible( showCurvedLabelModeFrame );
 
  mMultiLinesFrame->setEnabled( enableMultiLinesFrame );
 
 
  QString helperText;
  switch ( currentPlacement )
  {
    case Qgis::LabelPlacement::AroundPoint:
      if ( currentGeometryType == Qgis::GeometryType::Point )
        helperText = tr( "Arranges label candidates in a clockwise circle around the feature, preferring placements to the top-right of the feature." );
      else if ( currentGeometryType == Qgis::GeometryType::Polygon )
        helperText = tr( "Arranges label candidates in a cluster around the feature's centroid, preferring placements directly over the centroid." );
      break;
    case Qgis::LabelPlacement::OverPoint:
      if ( currentGeometryType == Qgis::GeometryType::Point )
        helperText = tr( "Arranges label candidates directly over the feature or at a preset offset from the feature." );
      else if ( currentGeometryType == Qgis::GeometryType::Polygon )
        helperText = tr( "Arranges label candidates directly over the feature's centroid, or at a preset offset from the centroid." );
      break;
    case Qgis::LabelPlacement::Line:
      if ( currentGeometryType == Qgis::GeometryType::Line )
        helperText = tr( "Arranges label candidates parallel to a generalised line representing the feature. Placements which fall over straighter portions of the line are preferred." );
      else if ( currentGeometryType == Qgis::GeometryType::Polygon )
        helperText = tr( "Arranges label candidates parallel to a generalised line representing the polygon's perimeter. Placements which fall over straighter portions of the perimeter are preferred." );
      break;
    case Qgis::LabelPlacement::Curved:
      if ( currentGeometryType == Qgis::GeometryType::Line )
        helperText = tr( "Arranges candidates following the curvature of a line feature. Placements which fall over straighter portions of the line are preferred." );
      break;
    case Qgis::LabelPlacement::Horizontal:
      if ( currentGeometryType == Qgis::GeometryType::Polygon )
        helperText = tr( "Arranges label candidates scattered throughout the polygon. Labels will always be placed horizontally, with placements further from the edges of the polygon preferred." );
      else if ( currentGeometryType == Qgis::GeometryType::Line )
        helperText = tr( "Label candidates are arranged horizontally along the length of the feature." );
      break;
    case Qgis::LabelPlacement::Free:
      if ( currentGeometryType == Qgis::GeometryType::Polygon )
        helperText = tr(
          "Arranges label candidates scattered throughout the polygon. Labels are rotated to respect the polygon's orientation, with placements further from the edges of the polygon preferred."
        );
      break;
    case Qgis::LabelPlacement::OrderedPositionsAroundPoint:
      if ( currentGeometryType == Qgis::GeometryType::Point )
        helperText
          = tr( "Label candidates are placed in predefined positions around the features. Preference is given to positions with greatest cartographic appeal, e.g., top right and bottom right of the feature." );
      break;
    case Qgis::LabelPlacement::PerimeterCurved:
      if ( currentGeometryType == Qgis::GeometryType::Polygon )
        helperText = tr( "Arranges candidates following the curvature of the feature's perimeter. Placements which fall over straighter portions of the perimeter are preferred." );
      break;
    case Qgis::LabelPlacement::OutsidePolygons:
      if ( currentGeometryType == Qgis::GeometryType::Polygon )
        helperText = tr( "Label candidates are placed outside of the features, preferring placements which give greatest visual association between the label and the feature." );
      break;
  }
  mPlacementModeDescriptionLabel->setText( u"<i>%1</i>"_s.arg( helperText ) );
}
 
void QgsTextFormatWidget::populateFontCapitalsComboBox()
{
  mFontCapitalsComboBox->addItem( tr( "No Change" ), static_cast<int>( Qgis::Capitalization::MixedCase ) );
  mFontCapitalsComboBox->addItem( tr( "All Uppercase" ), static_cast<int>( Qgis::Capitalization::AllUppercase ) );
  mFontCapitalsComboBox->addItem( tr( "All Lowercase" ), static_cast<int>( Qgis::Capitalization::AllLowercase ) );
  mFontCapitalsComboBox->addItem( tr( "Small Caps" ), static_cast<int>( Qgis::Capitalization::SmallCaps ) );
  mFontCapitalsComboBox->addItem( tr( "All Small Caps" ), static_cast<int>( Qgis::Capitalization::AllSmallCaps ) );
  mFontCapitalsComboBox->addItem( tr( "Title Case" ), static_cast<int>( Qgis::Capitalization::TitleCase ) );
  mFontCapitalsComboBox->addItem( tr( "Force First Letter to Capital" ), static_cast<int>( Qgis::Capitalization::ForceFirstLetterToCapital ) );
}
 
void QgsTextFormatWidget::populateFontStyleComboBox()
{
  mFontStyleComboBox->clear();
  const QStringList styles = mFontDB.styles( mRefFont.family() );
  const auto constStyles = styles;
  for ( const QString &style : constStyles )
  {
    mFontStyleComboBox->addItem( style );
  }
 
  QString targetStyle = mFontDB.styleString( mRefFont );
  if ( !styles.contains( targetStyle ) )
  {
    const QFont f = QgsFontUtils::createFont( mRefFont.family() );
    targetStyle = QFontInfo( f ).styleName();
    mRefFont.setStyleName( targetStyle );
  }
  int curIndx = 0;
  const int stylIndx = mFontStyleComboBox->findText( targetStyle );
  if ( stylIndx > -1 )
  {
    curIndx = stylIndx;
  }
 
  mFontStyleComboBox->setCurrentIndex( curIndx );
}
 
void QgsTextFormatWidget::mFontSizeSpinBox_valueChanged( double d )
{
  mRefFont.setPointSizeF( d );
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mFontFamilyCmbBx_currentFontChanged( const QFont &f )
{
  QgsFontUtils::setFontFamily( mRefFont, f.family() );
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mFontStyleComboBox_currentIndexChanged( const QString &text )
{
  QgsFontUtils::updateFontViaStyle( mRefFont, text );
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mFontUnderlineBtn_toggled( bool ckd )
{
  mRefFont.setUnderline( ckd );
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mFontStrikethroughBtn_toggled( bool ckd )
{
  mRefFont.setStrikeOut( ckd );
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::kerningToggled( bool checked )
{
  mRefFont.setKerning( checked );
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mFontWordSpacingSpinBox_valueChanged( double spacing )
{
  mRefFont.setWordSpacing( spacing );
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mFontLetterSpacingSpinBox_valueChanged( double spacing )
{
  mRefFont.setLetterSpacing( QFont::AbsoluteSpacing, spacing );
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mFontSizeUnitWidget_changed()
{
  // disable pixel size limiting for labels defined in points
  if ( mFontSizeUnitWidget->unit() != Qgis::RenderUnit::MapUnits )
  {
    mFontLimitPixelChkBox->setChecked( false );
  }
  else if ( mMinPixelLimit == 0 )
  {
    // initial minimum trigger value set, turn on pixel size limiting by default
    // for labels defined in map units (ignored after first settings save)
    mFontLimitPixelChkBox->setChecked( true );
  }
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mFontMinPixelSpinBox_valueChanged( int px )
{
  // ensure max font pixel size for map unit labels can't be lower than min
  mFontMaxPixelSpinBox->setMinimum( px );
  mFontMaxPixelSpinBox->update();
}
 
void QgsTextFormatWidget::mFontMaxPixelSpinBox_valueChanged( int px )
{
  // ensure max font pixel size for map unit labels can't be lower than min
  if ( px < mFontMinPixelSpinBox->value() )
  {
    mFontMaxPixelSpinBox->blockSignals( true );
    mFontMaxPixelSpinBox->setValue( mFontMinPixelSpinBox->value() );
    mFontMaxPixelSpinBox->blockSignals( false );
  }
  mFontMaxPixelSpinBox->setMinimum( mFontMinPixelSpinBox->value() );
}
 
void QgsTextFormatWidget::mBufferUnitWidget_changed()
{
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mMaskBufferUnitWidget_changed()
{
  updateFont( mRefFont );
}
 
void QgsTextFormatWidget::mCoordXDDBtn_changed()
{
  updateDataDefinedAlignment();
}
 
void QgsTextFormatWidget::mCoordXDDBtn_activated( bool isActive )
{
  if ( !isActive )
    return;
 
  mCoordPointDDBtn->setActive( false );
}
 
void QgsTextFormatWidget::mCoordYDDBtn_changed()
{
  updateDataDefinedAlignment();
}
 
void QgsTextFormatWidget::mCoordYDDBtn_activated( bool isActive )
{
  if ( !isActive )
    return;
 
  mCoordPointDDBtn->setActive( false );
}
 
void QgsTextFormatWidget::mCoordPointDDBtn_changed()
{
  updateDataDefinedAlignment();
}
 
void QgsTextFormatWidget::mCoordPointDDBtn_activated( bool isActive )
{
  if ( !isActive )
    return;
 
  mCoordXDDBtn->setActive( false );
  mCoordYDDBtn->setActive( false );
}
 
void QgsTextFormatWidget::mShapeTypeCmbBx_currentIndexChanged( int )
{
  // shape background
  const QgsTextBackgroundSettings::ShapeType type = static_cast<QgsTextBackgroundSettings::ShapeType>( mShapeTypeCmbBx->currentData().toInt() );
  const bool isRect = type == QgsTextBackgroundSettings::ShapeRectangle || type == QgsTextBackgroundSettings::ShapeSquare;
  const bool isSVG = type == QgsTextBackgroundSettings::ShapeSVG;
  const bool isMarker = type == QgsTextBackgroundSettings::ShapeMarkerSymbol;
 
  showBackgroundRadius( isRect );
 
  mShapeSVGPathFrame->setVisible( isSVG );
  mBackgroundMarkerSymbolButton->setVisible( isMarker );
  mBackgroundFillSymbolButton->setVisible( !isSVG && !isMarker );
 
  // symbology SVG and marker renderers only support size^2 scaling,
  // so we only use the x size spinbox
  mShapeSizeYLabel->setVisible( !isSVG && !isMarker );
  mShapeSizeYSpnBx->setVisible( !isSVG && !isMarker );
  mShapeSizeYDDBtn->setVisible( !isSVG && !isMarker );
  mShapeSizeXLabel->setText( tr( "Size%1" ).arg( !isSVG && !isMarker ? tr( " X" ) : QString() ) );
 
  // SVG parameter setting doesn't support color's alpha component yet
  mShapeFillColorBtn->setAllowOpacity( !isSVG );
  mShapeFillColorBtn->setButtonBackground();
  mShapeStrokeColorBtn->setAllowOpacity( !isSVG );
  mShapeStrokeColorBtn->setButtonBackground();
 
  // Hide parameter widgets not used by marker symbol
  mShapeFillColorLabel->setVisible( isSVG );
  mShapeFillColorLabel->setEnabled( isSVG );
  mShapeFillColorBtn->setVisible( isSVG );
  mShapeFillColorBtn->setEnabled( isSVG );
  mShapeFillColorDDBtn->setVisible( isSVG );
  mShapeFillColorDDBtn->setEnabled( isSVG );
  mShapeStrokeColorLabel->setVisible( isSVG );
  mShapeStrokeColorLabel->setEnabled( isSVG );
  mShapeStrokeColorBtn->setVisible( isSVG );
  mShapeStrokeColorBtn->setEnabled( isSVG );
  mShapeStrokeColorDDBtn->setVisible( isSVG );
  mShapeStrokeColorDDBtn->setEnabled( isSVG );
  mShapeStrokeWidthLabel->setVisible( isSVG );
  mShapeStrokeWidthLabel->setEnabled( isSVG );
  mShapeStrokeWidthSpnBx->setVisible( isSVG );
  mShapeStrokeWidthSpnBx->setEnabled( isSVG );
  mShapeStrokeWidthDDBtn->setVisible( isSVG );
  mShapeStrokeWidthDDBtn->setEnabled( isSVG );
 
  // configure SVG parameter widgets
  mShapeSVGParamsBtn->setVisible( isSVG );
  if ( isSVG )
  {
    updateSvgWidgets( mShapeSVGPathLineEdit->text() );
  }
  // TODO: fix overriding SVG symbol's stroke width units in QgsSvgCache
  // currently broken, fall back to symbol units only
  mShapeSVGUnitsLabel->setVisible( isSVG );
  mShapeStrokeWidthUnitWidget->setVisible( false );
  mShapeStrokeUnitsDDBtn->setVisible( false );
  mShapeStrokeUnitsDDBtn->setEnabled( false );
 
  updateAvailableShadowPositions();
}
 
void QgsTextFormatWidget::mShapeSVGPathLineEdit_textChanged( const QString &text )
{
  updateSvgWidgets( text );
}
 
void QgsTextFormatWidget::updateLinePlacementOptions()
{
  const int numOptionsChecked = ( chkLineAbove->isChecked() ? 1 : 0 ) + ( chkLineBelow->isChecked() ? 1 : 0 ) + ( chkLineOn->isChecked() ? 1 : 0 );
 
  if ( numOptionsChecked == 1 )
  {
    //prevent unchecking last option
    chkLineAbove->setEnabled( !chkLineAbove->isChecked() );
    chkLineBelow->setEnabled( !chkLineBelow->isChecked() );
    chkLineOn->setEnabled( !chkLineOn->isChecked() );
  }
  else
  {
    chkLineAbove->setEnabled( true );
    chkLineBelow->setEnabled( true );
    chkLineOn->setEnabled( true );
  }
}
 
void QgsTextFormatWidget::onSubstitutionsChanged( const QgsStringReplacementCollection &substitutions )
{
  mSubstitutions = substitutions;
  emit widgetChanged();
}
 
void QgsTextFormatWidget::previewScaleChanged( double scale )
{
  lblFontPreview->setScale( scale );
}
 
void QgsTextFormatWidget::updateSvgWidgets( const QString &svgPath )
{
  if ( mShapeSVGPathLineEdit->text() != svgPath )
  {
    mShapeSVGPathLineEdit->setText( svgPath );
  }
 
  QString resolvedPath;
  bool validSVG = true;
  if ( !svgPath.startsWith( "base64:"_L1, Qt::CaseInsensitive ) )
  {
    resolvedPath = QgsSymbolLayerUtils::svgSymbolNameToPath( svgPath, QgsProject::instance()->pathResolver() );
    validSVG = QFileInfo::exists( resolvedPath );
  }
  else
  {
    resolvedPath = svgPath;
    validSVG = true;
  }
 
  // draw red text for path field if invalid (path can't be resolved)
  mShapeSVGPathLineEdit->setStyleSheet( !validSVG ? u"QLineEdit{ color: rgb(225, 0, 0); }"_s : QString() );
  mShapeSVGPathLineEdit->setToolTip( !validSVG ? tr( "File not found" ) : resolvedPath );
 
  QColor fill, stroke;
  double strokeWidth = 0.0;
  bool fillParam = false, strokeParam = false, strokeWidthParam = false;
  if ( validSVG )
  {
    QgsApplication::svgCache()->containsParams( resolvedPath, fillParam, fill, strokeParam, stroke, strokeWidthParam, strokeWidth );
  }
 
  mShapeSVGParamsBtn->setEnabled( validSVG && ( fillParam || strokeParam || strokeWidthParam ) );
 
  mShapeFillColorLabel->setEnabled( validSVG && fillParam );
  mShapeFillColorBtn->setEnabled( validSVG && fillParam );
  mShapeFillColorDDBtn->setEnabled( validSVG && fillParam );
  if ( mLoadSvgParams && validSVG && fillParam )
    mShapeFillColorBtn->setColor( fill );
 
  mShapeStrokeColorLabel->setEnabled( validSVG && strokeParam );
  mShapeStrokeColorBtn->setEnabled( validSVG && strokeParam );
  mShapeStrokeColorDDBtn->setEnabled( validSVG && strokeParam );
  if ( mLoadSvgParams && validSVG && strokeParam )
    mShapeStrokeColorBtn->setColor( stroke );
 
  mShapeStrokeWidthLabel->setEnabled( validSVG && strokeWidthParam );
  mShapeStrokeWidthSpnBx->setEnabled( validSVG && strokeWidthParam );
  mShapeStrokeWidthDDBtn->setEnabled( validSVG && strokeWidthParam );
  if ( mLoadSvgParams && validSVG && strokeWidthParam )
    mShapeStrokeWidthSpnBx->setValue( strokeWidth );
 
  // TODO: fix overriding SVG symbol's stroke width units in QgsSvgCache
  // currently broken, fall back to symbol's
  //mShapeStrokeWidthUnitWidget->setEnabled( validSVG && strokeWidthParam );
  //mShapeStrokeUnitsDDBtn->setEnabled( validSVG && strokeWidthParam );
  mShapeSVGUnitsLabel->setEnabled( validSVG && strokeWidthParam );
}
 
void QgsTextFormatWidget::updateAvailableShadowPositions()
{
  if ( mShadowUnderCmbBx->count() == 0
       || ( mShadowUnderCmbBx->findData( QgsTextShadowSettings::ShadowShape ) > -1 && mShapeTypeCmbBx->currentData().toInt() == QgsTextBackgroundSettings::ShapeMarkerSymbol )
       || ( mShadowUnderCmbBx->findData( QgsTextShadowSettings::ShadowShape ) == -1 && mShapeTypeCmbBx->currentData().toInt() != QgsTextBackgroundSettings::ShapeMarkerSymbol ) )
  {
    // showing invalid choices, have to rebuild the list
    const QgsTextShadowSettings::ShadowPlacement currentPlacement = static_cast<QgsTextShadowSettings::ShadowPlacement>( mShadowUnderCmbBx->currentData().toInt() );
    mShadowUnderCmbBx->clear();
 
    mShadowUnderCmbBx->addItem( tr( "Lowest Label Component" ), QgsTextShadowSettings::ShadowLowest );
    mShadowUnderCmbBx->addItem( tr( "Text" ), QgsTextShadowSettings::ShadowText );
    mShadowUnderCmbBx->addItem( tr( "Buffer" ), QgsTextShadowSettings::ShadowBuffer );
    if ( mShapeTypeCmbBx->currentData().toInt() != QgsTextBackgroundSettings::ShapeMarkerSymbol )
      mShadowUnderCmbBx->addItem( tr( "Background" ), QgsTextShadowSettings::ShadowShape ); // not supported for marker symbol background shapes
 
    mShadowUnderCmbBx->setCurrentIndex( mShadowUnderCmbBx->findData( currentPlacement ) );
    if ( mShadowUnderCmbBx->currentIndex() == -1 )
      mShadowUnderCmbBx->setCurrentIndex( 0 );
  }
}
 
void QgsTextFormatWidget::updateProperty()
{
  QgsPropertyOverrideButton *button = qobject_cast<QgsPropertyOverrideButton *>( sender() );
  const QgsPalLayerSettings::Property key = static_cast<QgsPalLayerSettings::Property>( button->propertyKey() );
  mDataDefinedProperties.setProperty( key, button->toProperty() );
  updatePreview();
}
 
void QgsTextFormatWidget::createAuxiliaryField()
{
  if ( !mLayer )
    return;
 
  QgsVectorLayer *vLayer = qobject_cast<QgsVectorLayer *>( mLayer );
 
  if ( !vLayer )
    return;
 
  // try to create an auxiliary layer if not yet created
  if ( !vLayer->auxiliaryLayer() )
  {
    QgsNewAuxiliaryLayerDialog dlg( vLayer, this );
    dlg.exec();
  }
 
  // return if still not exists
  if ( !vLayer->auxiliaryLayer() )
    return;
 
  QgsPropertyOverrideButton *button = qobject_cast<QgsPropertyOverrideButton *>( sender() );
  const QgsPalLayerSettings::Property key = static_cast<QgsPalLayerSettings::Property>( button->propertyKey() );
  const QgsPropertyDefinition def = QgsPalLayerSettings::propertyDefinitions()[static_cast<int>( key )];
 
  // create property in auxiliary storage if necessary
  if ( !vLayer->auxiliaryLayer()->exists( def ) )
    vLayer->auxiliaryLayer()->addAuxiliaryField( def );
 
  // update property with join field name from auxiliary storage
  QgsProperty property = button->toProperty();
  property.setField( QgsAuxiliaryLayer::nameFromProperty( def, true ) );
  property.setActive( true );
  button->updateFieldLists();
  button->setToProperty( property );
  mDataDefinedProperties.setProperty( key, button->toProperty() );
  updatePreview();
  emit auxiliaryFieldCreated();
}
 
 
void QgsTextFormatWidget::updateShapeFrameStatus()
{
  mShapeFrame->setEnabled( mShapeDrawDDBtn->isActive() || mShapeDrawChkBx->isChecked() );
}
 
void QgsTextFormatWidget::updateBufferFrameStatus()
{
  mBufferFrame->setEnabled( mBufferDrawDDBtn->isActive() || mBufferDrawChkBx->isChecked() );
}
 
void QgsTextFormatWidget::updateShadowFrameStatus()
{
  mShadowFrame->setEnabled( mShadowDrawDDBtn->isActive() || mShadowDrawChkBx->isChecked() );
}
 
void QgsTextFormatWidget::updateCalloutFrameStatus()
{
  mCalloutFrame->setEnabled( mCalloutDrawDDBtn->isActive() || mCalloutsDrawCheckBox->isChecked() );
}
 
void QgsTextFormatWidget::updateDataDefinedAlignment()
{
  // no data defined alignment without data defined position
  mCoordAlignmentFrame->setEnabled( ( mCoordXDDBtn->isActive() && mCoordYDDBtn->isActive() ) || mCoordPointDDBtn->isActive() );
}
 
void QgsTextFormatWidget::overlapModeChanged()
{
  QString description;
  switch ( static_cast<Qgis::LabelOverlapHandling>( mComboOverlapHandling->currentData().toInt() ) )
  {
    case Qgis::LabelOverlapHandling::PreventOverlap:
      description = tr( "Overlapping labels will never be placed for the layer, even if it means some labels will be missing. (To see unplaced labels use the \"Show Unplaced Labels\" toolbar action.)" );
      break;
    case Qgis::LabelOverlapHandling::AllowOverlapIfRequired:
      description = tr( "If a label cannot otherwise be placed for a feature then an overlapping label is permitted." );
      break;
    case Qgis::LabelOverlapHandling::AllowOverlapAtNoCost:
      description = tr( "Labels from this layer may freely overlap other labels or label obstacles without penalty." );
      break;
  }
 
  mOverlapModeDescriptionLabel->setText( u"<i>%1</i>"_s.arg( description ) );
}
 
void QgsTextFormatWidget::updateCurvedLabelDescription()
{
  switch ( mComboCurvedLabelMode->currentData().value< Qgis::CurvedLabelMode >() )
  {
    case Qgis::CurvedLabelMode::Default:
      mCurvedModeDescriptionLabel->hide();
      break;
    case Qgis::CurvedLabelMode::PlaceCharactersAtVertices:
      mCurvedModeDescriptionLabel->setText( tr( "Places individual characters from the label at each corresponding vertex in the line." ) );
      mCurvedModeDescriptionLabel->show();
      break;
    case Qgis::CurvedLabelMode::StretchCharacterSpacingToFitLine:
      mCurvedModeDescriptionLabel->setText( tr( "Stretches (or shrinks) character spacing so that the curved label fits the whole line." ) );
      mCurvedModeDescriptionLabel->show();
      break;
    case Qgis::CurvedLabelMode::StretchWordSpacingToFitLine:
      mCurvedModeDescriptionLabel->setText( tr( "Stretches (or shrinks) word spacing so that the curved label fits the whole line." ) );
      mCurvedModeDescriptionLabel->show();
      break;
  }
}
 
void QgsTextFormatWidget::setFormatFromStyle( const QString &name, QgsStyle::StyleEntity type, const QString &stylePath )
{
  if ( name.isEmpty() )
    return;
 
  QgsStyle *style = QgsProject::instance()->styleSettings()->styleAtPath( stylePath );
 
  if ( !style )
    style = QgsStyle::defaultStyle();
 
  switch ( type )
  {
    case QgsStyle::SymbolEntity:
    case QgsStyle::ColorrampEntity:
    case QgsStyle::TagEntity:
    case QgsStyle::SmartgroupEntity:
    case QgsStyle::LegendPatchShapeEntity:
    case QgsStyle::Symbol3DEntity:
    case QgsStyle::MaterialSettingsEntity:
      return;
 
    case QgsStyle::TextFormatEntity:
    {
      if ( !style->textFormatNames().contains( name ) )
        return;
 
      const QgsTextFormat newFormat = style->textFormat( name );
      setFormat( newFormat );
      break;
    }
 
    case QgsStyle::LabelSettingsEntity:
    {
      if ( !style->labelSettingsNames().contains( name ) )
        return;
 
      const QgsTextFormat newFormat = style->labelSettings( name ).format();
      setFormat( newFormat );
      break;
    }
  }
}
 
void QgsTextFormatWidget::saveFormat()
{
  QgsStyleSaveDialog saveDlg( this, QgsStyle::TextFormatEntity );
  saveDlg.setDefaultTags( mTextFormatsListWidget->currentTagFilter() );
  if ( !saveDlg.exec() )
    return;
 
  if ( saveDlg.name().isEmpty() )
    return;
 
  QgsStyle *style = saveDlg.destinationStyle();
  if ( !style )
    return;
 
  // check if there is no format with same name
  if ( style->textFormatNames().contains( saveDlg.name() ) )
  {
    const int res = QMessageBox::warning( this, tr( "Save Text Format" ), tr( "Format with name '%1' already exists. Overwrite?" ).arg( saveDlg.name() ), QMessageBox::Yes | QMessageBox::No );
    if ( res != QMessageBox::Yes )
    {
      return;
    }
    style->removeTextFormat( saveDlg.name() );
  }
 
  const QStringList symbolTags = saveDlg.tags().split( ',' );
 
  const QgsTextFormat newFormat = format();
  style->addTextFormat( saveDlg.name(), newFormat );
  style->saveTextFormat( saveDlg.name(), newFormat, saveDlg.isFavorite(), symbolTags );
}
 
void QgsTextFormatWidget::mShapeSVGSelectorBtn_clicked()
{
  QgsSvgSelectorDialog svgDlg( this );
  svgDlg.setWindowTitle( tr( "Select SVG file" ) );
  svgDlg.svgSelector()->setSvgPath( mShapeSVGPathLineEdit->text().trimmed() );
 
  if ( svgDlg.exec() == QDialog::Accepted )
  {
    const QString svgPath = svgDlg.svgSelector()->currentSvgPath();
    if ( !svgPath.isEmpty() )
    {
      mShapeSVGPathLineEdit->setText( svgPath );
      updatePreview();
    }
  }
}
 
void QgsTextFormatWidget::mShapeSVGParamsBtn_clicked()
{
  const QString svgPath = mShapeSVGPathLineEdit->text();
  mLoadSvgParams = true;
  updateSvgWidgets( svgPath );
  mLoadSvgParams = false;
}
 
void QgsTextFormatWidget::mShapeRotationCmbBx_currentIndexChanged( int index )
{
  mShapeRotationDblSpnBx->setEnabled( static_cast<QgsTextBackgroundSettings::RotationType>( index ) != QgsTextBackgroundSettings::RotationSync );
  mShapeRotationDDBtn->setEnabled( static_cast<QgsTextBackgroundSettings::RotationType>( index ) != QgsTextBackgroundSettings::RotationSync );
}
 
void QgsTextFormatWidget::mPreviewTextEdit_textChanged( const QString &text )
{
  lblFontPreview->setText( text );
  updatePreview();
}
 
void QgsTextFormatWidget::mPreviewTextBtn_clicked()
{
  mPreviewTextEdit->setText( u"Lorem Ipsum"_s );
  updatePreview();
}
 
void QgsTextFormatWidget::mPreviewBackgroundBtn_colorChanged( const QColor &color )
{
  setPreviewBackground( color );
}
 
void QgsTextFormatWidget::mDirectSymbLeftToolBtn_clicked()
{
  bool gotChar = false;
 
  const QChar initial = !mDirectSymbLeftLineEdit->text().isEmpty() ? mDirectSymbLeftLineEdit->text().at( 0 ) : QChar();
  const QChar dirSymb = mCharDlg->selectCharacter( &gotChar, mRefFont, mFontDB.styleString( mRefFont ), initial );
 
  if ( !gotChar )
    return;
 
  if ( !dirSymb.isNull() )
    mDirectSymbLeftLineEdit->setText( QString( dirSymb ) );
}
 
void QgsTextFormatWidget::mDirectSymbRightToolBtn_clicked()
{
  bool gotChar = false;
  const QChar initial = !mDirectSymbRightLineEdit->text().isEmpty() ? mDirectSymbRightLineEdit->text().at( 0 ) : QChar();
  const QChar dirSymb = mCharDlg->selectCharacter( &gotChar, mRefFont, mFontDB.styleString( mRefFont ), initial );
 
  if ( !gotChar )
    return;
 
  if ( !dirSymb.isNull() )
    mDirectSymbRightLineEdit->setText( QString( dirSymb ) );
}
 
void QgsTextFormatWidget::chkLineOrientationDependent_toggled( bool active )
{
  if ( active )
  {
    chkLineAbove->setText( tr( "Left of line" ) );
    chkLineBelow->setText( tr( "Right of line" ) );
  }
  else
  {
    chkLineAbove->setText( tr( "Above line" ) );
    chkLineBelow->setText( tr( "Below line" ) );
  }
}
 
 
void QgsTextFormatWidget::mToolButtonConfigureSubstitutes_clicked()
{
  QgsPanelWidget *panel = QgsPanelWidget::findParentPanel( this );
  if ( panel && panel->dockMode() )
  {
    QgsSubstitutionListWidget *widget = new QgsSubstitutionListWidget( panel );
    widget->setPanelTitle( tr( "Substitutions" ) );
    widget->setSubstitutions( mSubstitutions );
    connect( widget, &QgsSubstitutionListWidget::substitutionsChanged, this, &QgsTextFormatWidget::onSubstitutionsChanged );
    panel->openPanel( widget );
    return;
  }
 
  QgsSubstitutionListDialog dlg( this );
  dlg.setSubstitutions( mSubstitutions );
  if ( dlg.exec() == QDialog::Accepted )
  {
    mSubstitutions = dlg.substitutions();
    emit widgetChanged();
  }
}
 
void QgsTextFormatWidget::configureTabStops()
{
  QgsPanelWidget *panel = QgsPanelWidget::findParentPanel( this );
  if ( panel && panel->dockMode() )
  {
    QgsTabPositionWidget *widget = new QgsTabPositionWidget( panel );
    widget->setPanelTitle( tr( "Tab Positions" ) );
    widget->setPositions( mTabPositions );
    widget->setUnit( mTabDistanceUnitWidget->unit() );
    connect( widget, &QgsTabPositionWidget::positionsChanged, this, [this]( const QList<QgsTextFormat::Tab> &positions ) {
      mTabPositions = positions;
      mTabStopDistanceSpin->setEnabled( mTabPositions.empty() );
      emit widgetChanged();
    } );
    panel->openPanel( widget );
  }
  else
  {
    QgsTabPositionDialog dlg( this );
    dlg.setPositions( mTabPositions );
    dlg.setUnit( mTabDistanceUnitWidget->unit() );
    if ( dlg.exec() == QDialog::Accepted )
    {
      mTabPositions = dlg.positions();
      mTabStopDistanceSpin->setEnabled( mTabPositions.empty() );
      emit widgetChanged();
    }
  }
}
 
void QgsTextFormatWidget::showBackgroundRadius( bool show )
{
  mShapeRadiusLabel->setVisible( show );
  mShapeRadiusXDbSpnBx->setVisible( show );
 
  mShapeRadiusYDbSpnBx->setVisible( show );
 
  mShapeRadiusUnitWidget->setVisible( show );
 
  mShapeRadiusDDBtn->setVisible( show );
  mShapeRadiusUnitsDDBtn->setVisible( show );
}
 
QgsExpressionContext QgsTextFormatWidget::createExpressionContext() const
{
  if ( auto *lExpressionContext = mContext.expressionContext() )
    return *lExpressionContext;
 
  QgsExpressionContext expContext;
  if ( mMapCanvas )
  {
    expContext = mMapCanvas->createExpressionContext();
  }
  else
  {
    expContext
      << QgsExpressionContextUtils::globalScope()
      << QgsExpressionContextUtils::projectScope( QgsProject::instance() )
      << QgsExpressionContextUtils::atlasScope( nullptr )
      << QgsExpressionContextUtils::mapSettingsScope( QgsMapSettings() );
  }
 
  if ( mLayer )
    expContext << QgsExpressionContextUtils::layerScope( mLayer );
 
  //TODO - show actual value
  expContext.setOriginalValueVariable( QVariant() );
  expContext.setHighlightedVariables( QStringList() << QgsExpressionContext::EXPR_ORIGINAL_VALUE );
 
  return expContext;
}
 
Qgis::GeometryType QgsTextFormatWidget::labelGeometryType() const
{
  if ( mGeometryGeneratorGroupBox->isChecked() )
    return mGeometryGeneratorType->currentData().value<Qgis::GeometryType>();
  else if ( QgsVectorLayer *vLayer = qobject_cast<QgsVectorLayer *>( mLayer ) )
    return vLayer->geometryType();
  else
    return mGeomType;
}
 
 
//
// QgsTextFormatDialog
//
 
QgsTextFormatDialog::QgsTextFormatDialog( const QgsTextFormat &format, QgsMapCanvas *mapCanvas, QWidget *parent, Qt::WindowFlags fl, QgsMapLayer *layer )
  : QDialog( parent, fl )
{
  setWindowTitle( tr( "Text Settings" ) );
 
  mFormatWidget = new QgsTextFormatWidget( format, mapCanvas, this, layer );
  mFormatWidget->layout()->setContentsMargins( 0, 0, 0, 0 );
 
  QVBoxLayout *layout = new QVBoxLayout( this );
  layout->addWidget( mFormatWidget );
 
  mButtonBox = new QDialogButtonBox( QDialogButtonBox::Ok | QDialogButtonBox::Cancel | QDialogButtonBox::Help, Qt::Horizontal, this );
  layout->addWidget( mButtonBox );
 
  setLayout( layout );
  QgsGui::enableAutoGeometryRestore( this );
 
  connect( mButtonBox->button( QDialogButtonBox::Ok ), &QAbstractButton::clicked, this, &QDialog::accept );
  connect( mButtonBox->button( QDialogButtonBox::Cancel ), &QAbstractButton::clicked, this, &QDialog::reject );
  connect( mButtonBox->button( QDialogButtonBox::Help ), &QAbstractButton::clicked, this, &QgsTextFormatDialog::showHelp );
}
 
QgsTextFormat QgsTextFormatDialog::format() const
{
  return mFormatWidget->format();
}
 
void QgsTextFormatDialog::showHelp()
{
  QgsHelp::openHelp( u"style_library/label_settings.html#formatting-the-label-text"_s );
}
 
void QgsTextFormatDialog::setContext( const QgsSymbolWidgetContext &context )
{
  mFormatWidget->setContext( context );
}
 
QDialogButtonBox *QgsTextFormatDialog::buttonBox() const
{
  return mButtonBox;
}
 
QgsTextFormatPanelWidget::QgsTextFormatPanelWidget( const QgsTextFormat &format, QgsMapCanvas *mapCanvas, QWidget *parent, QgsMapLayer *layer )
  : QgsPanelWidgetWrapper( new QgsTextFormatWidget( format, mapCanvas, nullptr, layer ), parent )
{
  mFormatWidget = qobject_cast<QgsTextFormatWidget *>( widget() );
  connect( mFormatWidget, &QgsTextFormatWidget::widgetChanged, this, [this] {
    if ( !mBlockSignals )
      emit widgetChanged();
  } );
}
 
QgsTextFormat QgsTextFormatPanelWidget::format() const
{
  return mFormatWidget->format();
}
 
void QgsTextFormatPanelWidget::setFormat( const QgsTextFormat &format )
{
  mBlockSignals = true;
  mFormatWidget->setFormat( format );
  mBlockSignals = false;
}
 
void QgsTextFormatPanelWidget::setContext( const QgsSymbolWidgetContext &context )
{
  mFormatWidget->setContext( context );
}
 
void QgsTextFormatPanelWidget::setDockMode( bool dockMode )
{
  mFormatWidget->setDockMode( dockMode );
  QgsPanelWidgetWrapper::setDockMode( dockMode );
}