QGIS API Documentation  3.14.0-Pi (9f7028fd23)
qgscalloutwidget.cpp
Go to the documentation of this file.
1 /***************************************************************************
2  qgscalloutwidget.cpp
3  ---------------------
4  begin : July 2019
5  copyright : (C) 2019 by Nyall Dawson
6  email : nyall dot dawson at gmail dot com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #include "qgscalloutwidget.h"
17 #include "qgsvectorlayer.h"
19 #include "qgsunitselectionwidget.h"
20 #include "qgscallout.h"
23 #include "qgsauxiliarystorage.h"
24 
26 {
27  if ( mContext.expressionContext() )
28  return *mContext.expressionContext();
29 
33  expContext << symbolScope;
34 
35  // additional scopes
36  const auto constAdditionalExpressionContextScopes = mContext.additionalExpressionContextScopes();
37  for ( const QgsExpressionContextScope &scope : constAdditionalExpressionContextScopes )
38  {
39  expContext.appendScope( new QgsExpressionContextScope( scope ) );
40  }
41 
42  //TODO - show actual value
43  expContext.setOriginalValueVariable( QVariant() );
44 
46 
47  return expContext;
48 }
49 
51 {
52  mContext = context;
53  const auto unitSelectionWidgets = findChildren<QgsUnitSelectionWidget *>();
54  for ( QgsUnitSelectionWidget *unitWidget : unitSelectionWidgets )
55  {
56  unitWidget->setMapCanvas( mContext.mapCanvas() );
57  }
58  const auto symbolButtonWidgets = findChildren<QgsSymbolButton *>();
59  for ( QgsSymbolButton *symbolWidget : symbolButtonWidgets )
60  {
61  symbolWidget->setMapCanvas( mContext.mapCanvas() );
62  symbolWidget->setMessageBar( mContext.messageBar() );
63  }
64 }
65 
67 {
68  return mContext;
69 }
70 
72 {
73  button->init( key, callout()->dataDefinedProperties(), QgsCallout::propertyDefinitions(), mVectorLayer, true );
74  connect( button, &QgsPropertyOverrideButton::changed, this, &QgsCalloutWidget::updateDataDefinedProperty );
75  connect( button, &QgsPropertyOverrideButton::createAuxiliaryField, this, &QgsCalloutWidget::createAuxiliaryField );
76 
77  button->registerExpressionContextGenerator( this );
78 }
79 
80 void QgsCalloutWidget::createAuxiliaryField()
81 {
82  // try to create an auxiliary layer if not yet created
83  if ( !mVectorLayer->auxiliaryLayer() )
84  {
85  QgsNewAuxiliaryLayerDialog dlg( mVectorLayer, this );
86  dlg.exec();
87  }
88 
89  // return if still not exists
90  if ( !mVectorLayer->auxiliaryLayer() )
91  return;
92 
93  QgsPropertyOverrideButton *button = qobject_cast<QgsPropertyOverrideButton *>( sender() );
94  QgsCallout::Property key = static_cast< QgsCallout::Property >( button->propertyKey() );
96 
97  // create property in auxiliary storage if necessary
98  if ( !mVectorLayer->auxiliaryLayer()->exists( def ) )
99  {
100  QgsNewAuxiliaryFieldDialog dlg( def, mVectorLayer, true, this );
101  if ( dlg.exec() == QDialog::Accepted )
102  def = dlg.propertyDefinition();
103  }
104 
105  // return if still not exist
106  if ( !mVectorLayer->auxiliaryLayer()->exists( def ) )
107  return;
108 
109  // update property with join field name from auxiliary storage
110  QgsProperty property = button->toProperty();
111  property.setField( QgsAuxiliaryLayer::nameFromProperty( def, true ) );
112  property.setActive( true );
113  button->updateFieldLists();
114  button->setToProperty( property );
115 
116  callout()->dataDefinedProperties().setProperty( key, button->toProperty() );
117 
118  emit changed();
119 }
120 
121 void QgsCalloutWidget::updateDataDefinedProperty()
122 {
123  QgsPropertyOverrideButton *button = qobject_cast<QgsPropertyOverrideButton *>( sender() );
124  QgsCallout::Property key = static_cast< QgsCallout::Property >( button->propertyKey() );
125  callout()->dataDefinedProperties().setProperty( key, button->toProperty() );
126  emit changed();
127 }
128 
130 
131 //
132 // QgsSimpleLineCalloutWidget
133 //
134 
135 QgsSimpleLineCalloutWidget::QgsSimpleLineCalloutWidget( QgsVectorLayer *vl, QWidget *parent )
136  : QgsCalloutWidget( parent, vl )
137 {
138  setupUi( this );
139 
140  // Callout options - to move to custom widgets when multiple callout styles exist
141  mCalloutLineStyleButton->setSymbolType( QgsSymbol::Line );
142  mCalloutLineStyleButton->setDialogTitle( tr( "Callout Symbol" ) );
143  mCalloutLineStyleButton->registerExpressionContextGenerator( this );
144 
145  mCalloutLineStyleButton->setLayer( vl );
152 
153  connect( mMinCalloutWidthUnitWidget, &QgsUnitSelectionWidget::changed, this, &QgsSimpleLineCalloutWidget::minimumLengthUnitWidgetChanged );
154  connect( mMinCalloutLengthSpin, static_cast < void ( QDoubleSpinBox::* )( double ) > ( &QDoubleSpinBox::valueChanged ), this, &QgsSimpleLineCalloutWidget::minimumLengthChanged );
155 
156  connect( mOffsetFromAnchorUnitWidget, &QgsUnitSelectionWidget::changed, this, &QgsSimpleLineCalloutWidget::offsetFromAnchorUnitWidgetChanged );
157  connect( mOffsetFromAnchorSpin, static_cast < void ( QDoubleSpinBox::* )( double ) > ( &QDoubleSpinBox::valueChanged ), this, &QgsSimpleLineCalloutWidget::offsetFromAnchorChanged );
158  connect( mOffsetFromLabelUnitWidget, &QgsUnitSelectionWidget::changed, this, &QgsSimpleLineCalloutWidget::offsetFromLabelUnitWidgetChanged );
159  connect( mOffsetFromLabelSpin, static_cast < void ( QDoubleSpinBox::* )( double ) > ( &QDoubleSpinBox::valueChanged ), this, &QgsSimpleLineCalloutWidget::offsetFromLabelChanged );
160 
161  connect( mDrawToAllPartsCheck, &QCheckBox::toggled, this, &QgsSimpleLineCalloutWidget::drawToAllPartsToggled );
162 
163  // Anchor point options
164  mAnchorPointComboBox->addItem( tr( "Pole of Inaccessibility" ), static_cast< int >( QgsCallout::PoleOfInaccessibility ) );
165  mAnchorPointComboBox->addItem( tr( "Point on Exterior" ), static_cast< int >( QgsCallout::PointOnExterior ) );
166  mAnchorPointComboBox->addItem( tr( "Point on Surface" ), static_cast< int >( QgsCallout::PointOnSurface ) );
167  mAnchorPointComboBox->addItem( tr( "Centroid" ), static_cast< int >( QgsCallout::Centroid ) );
168  connect( mAnchorPointComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsSimpleLineCalloutWidget::mAnchorPointComboBox_currentIndexChanged );
169 
170  mLabelAnchorPointComboBox->addItem( tr( "Closest Point" ), static_cast< int >( QgsCallout::LabelPointOnExterior ) );
171  mLabelAnchorPointComboBox->addItem( tr( "Centroid" ), static_cast< int >( QgsCallout::LabelCentroid ) );
172  mLabelAnchorPointComboBox->addItem( tr( "Top Left" ), static_cast< int >( QgsCallout::LabelTopLeft ) );
173  mLabelAnchorPointComboBox->addItem( tr( "Top Center" ), static_cast< int >( QgsCallout::LabelTopMiddle ) );
174  mLabelAnchorPointComboBox->addItem( tr( "Top Right" ), static_cast< int >( QgsCallout::LabelTopRight ) );
175  mLabelAnchorPointComboBox->addItem( tr( "Left Middle" ), static_cast< int >( QgsCallout::LabelMiddleLeft ) );
176  mLabelAnchorPointComboBox->addItem( tr( "Right Middle" ), static_cast< int >( QgsCallout::LabelMiddleRight ) );
177  mLabelAnchorPointComboBox->addItem( tr( "Bottom Left" ), static_cast< int >( QgsCallout::LabelBottomLeft ) );
178  mLabelAnchorPointComboBox->addItem( tr( "Bottom Center" ), static_cast< int >( QgsCallout::LabelBottomMiddle ) );
179  mLabelAnchorPointComboBox->addItem( tr( "Bottom Right" ), static_cast< int >( QgsCallout::LabelBottomRight ) );
180  connect( mLabelAnchorPointComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsSimpleLineCalloutWidget::mLabelAnchorPointComboBox_currentIndexChanged );
181 
182  connect( mCalloutLineStyleButton, &QgsSymbolButton::changed, this, &QgsSimpleLineCalloutWidget::lineSymbolChanged );
183 }
184 
185 void QgsSimpleLineCalloutWidget::setCallout( QgsCallout *callout )
186 {
187  if ( !callout )
188  return;
189 
190  mCallout.reset( dynamic_cast<QgsSimpleLineCallout *>( callout->clone() ) );
191  if ( !mCallout )
192  return;
193 
194  mMinCalloutWidthUnitWidget->blockSignals( true );
195  mMinCalloutWidthUnitWidget->setUnit( mCallout->minimumLengthUnit() );
196  mMinCalloutWidthUnitWidget->setMapUnitScale( mCallout->minimumLengthMapUnitScale() );
197  mMinCalloutWidthUnitWidget->blockSignals( false );
198 
199  whileBlocking( mMinCalloutLengthSpin )->setValue( mCallout->minimumLength() );
200 
201  mOffsetFromAnchorUnitWidget->blockSignals( true );
202  mOffsetFromAnchorUnitWidget->setUnit( mCallout->offsetFromAnchorUnit() );
203  mOffsetFromAnchorUnitWidget->setMapUnitScale( mCallout->offsetFromAnchorMapUnitScale() );
204  mOffsetFromAnchorUnitWidget->blockSignals( false );
205  mOffsetFromLabelUnitWidget->blockSignals( true );
206  mOffsetFromLabelUnitWidget->setUnit( mCallout->offsetFromLabelUnit() );
207  mOffsetFromLabelUnitWidget->setMapUnitScale( mCallout->offsetFromLabelMapUnitScale() );
208  mOffsetFromLabelUnitWidget->blockSignals( false );
209  whileBlocking( mOffsetFromAnchorSpin )->setValue( mCallout->offsetFromAnchor() );
210  whileBlocking( mOffsetFromLabelSpin )->setValue( mCallout->offsetFromLabel() );
211 
212  whileBlocking( mCalloutLineStyleButton )->setSymbol( mCallout->lineSymbol()->clone() );
213 
214  whileBlocking( mDrawToAllPartsCheck )->setChecked( mCallout->drawCalloutToAllParts() );
215 
216  whileBlocking( mAnchorPointComboBox )->setCurrentIndex( mAnchorPointComboBox->findData( static_cast< int >( callout->anchorPoint() ) ) );
217  whileBlocking( mLabelAnchorPointComboBox )->setCurrentIndex( mLabelAnchorPointComboBox->findData( static_cast< int >( callout->labelAnchorPoint() ) ) );
218 
219  registerDataDefinedButton( mMinCalloutLengthDDBtn, QgsCallout::MinimumCalloutLength );
220  registerDataDefinedButton( mOffsetFromAnchorDDBtn, QgsCallout::OffsetFromAnchor );
221  registerDataDefinedButton( mOffsetFromLabelDDBtn, QgsCallout::OffsetFromLabel );
222  registerDataDefinedButton( mDrawToAllPartsDDBtn, QgsCallout::DrawCalloutToAllParts );
223  registerDataDefinedButton( mAnchorPointDDBtn, QgsCallout::AnchorPointPosition );
224  registerDataDefinedButton( mLabelAnchorPointDDBtn, QgsCallout::LabelAnchorPointPosition );
225 }
226 
227 void QgsSimpleLineCalloutWidget::setGeometryType( QgsWkbTypes::GeometryType type )
228 {
229  bool isPolygon = type == QgsWkbTypes::PolygonGeometry;
230  mAnchorPointLbl->setEnabled( isPolygon );
231  mAnchorPointLbl->setVisible( isPolygon );
232  mAnchorPointComboBox->setEnabled( isPolygon );
233  mAnchorPointComboBox->setVisible( isPolygon );
234  mAnchorPointDDBtn->setEnabled( isPolygon );
235  mAnchorPointDDBtn->setVisible( isPolygon );
236 }
237 
238 QgsCallout *QgsSimpleLineCalloutWidget::callout()
239 {
240  return mCallout.get();
241 }
242 
243 void QgsSimpleLineCalloutWidget::minimumLengthChanged()
244 {
245  mCallout->setMinimumLength( mMinCalloutLengthSpin->value() );
246  emit changed();
247 }
248 
249 void QgsSimpleLineCalloutWidget::minimumLengthUnitWidgetChanged()
250 {
251  mCallout->setMinimumLengthUnit( mMinCalloutWidthUnitWidget->unit() );
252  mCallout->setMinimumLengthMapUnitScale( mMinCalloutWidthUnitWidget->getMapUnitScale() );
253  emit changed();
254 }
255 
256 void QgsSimpleLineCalloutWidget::offsetFromAnchorUnitWidgetChanged()
257 {
258  mCallout->setOffsetFromAnchorUnit( mOffsetFromAnchorUnitWidget->unit() );
259  mCallout->setOffsetFromAnchorMapUnitScale( mOffsetFromAnchorUnitWidget->getMapUnitScale() );
260  emit changed();
261 }
262 
263 void QgsSimpleLineCalloutWidget::offsetFromAnchorChanged()
264 {
265  mCallout->setOffsetFromAnchor( mOffsetFromAnchorSpin->value() );
266  emit changed();
267 }
268 
269 void QgsSimpleLineCalloutWidget::offsetFromLabelUnitWidgetChanged()
270 {
271  mCallout->setOffsetFromLabelUnit( mOffsetFromLabelUnitWidget->unit() );
272  mCallout->setOffsetFromLabelMapUnitScale( mOffsetFromLabelUnitWidget->getMapUnitScale() );
273  emit changed();
274 }
275 
276 void QgsSimpleLineCalloutWidget::offsetFromLabelChanged()
277 {
278  mCallout->setOffsetFromLabel( mOffsetFromLabelSpin->value() );
279  emit changed();
280 }
281 
282 void QgsSimpleLineCalloutWidget::lineSymbolChanged()
283 {
284  mCallout->setLineSymbol( mCalloutLineStyleButton->clonedSymbol< QgsLineSymbol >() );
285  emit changed();
286 }
287 
288 void QgsSimpleLineCalloutWidget::mAnchorPointComboBox_currentIndexChanged( int index )
289 {
290  mCallout->setAnchorPoint( static_cast<QgsCallout::AnchorPoint>( mAnchorPointComboBox->itemData( index ).toInt() ) );
291  emit changed();
292 }
293 
294 void QgsSimpleLineCalloutWidget::mLabelAnchorPointComboBox_currentIndexChanged( int index )
295 {
296  mCallout->setLabelAnchorPoint( static_cast<QgsCallout::LabelAnchorPoint>( mLabelAnchorPointComboBox->itemData( index ).toInt() ) );
297  emit changed();
298 }
299 
300 void QgsSimpleLineCalloutWidget::drawToAllPartsToggled( bool active )
301 {
302  mCallout->setDrawCalloutToAllParts( active );
303  emit changed();
304 }
305 
306 
307 //
308 // QgsManhattanLineCalloutWidget
309 //
310 
311 QgsManhattanLineCalloutWidget::QgsManhattanLineCalloutWidget( QgsVectorLayer *vl, QWidget *parent )
312  : QgsSimpleLineCalloutWidget( vl, parent )
313 {
314 
315 }
316 
317 
319 
QgsSymbolWidgetContext::globalProjectAtlasMapLayerScopes
QList< QgsExpressionContextScope * > globalProjectAtlasMapLayerScopes(const QgsMapLayer *layer) const
Returns list of scopes: global, project, atlas, map, layer.
Definition: qgssymbolwidgetcontext.cpp:92
QgsCallout::LabelPointOnExterior
@ LabelPointOnExterior
The point on the label's boundary closest to the feature.
Definition: qgscallout.h:101
QgsExpressionContext
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
Definition: qgsexpressioncontext.h:369
qgsexpressioncontextutils.h
QgsSymbolWidgetContext::mapCanvas
QgsMapCanvas * mapCanvas() const
Returns the map canvas associated with the widget.
Definition: qgssymbolwidgetcontext.cpp:54
QgsUnitTypes::RenderInches
@ RenderInches
Inches.
Definition: qgsunittypes.h:173
QgsCalloutWidget
Definition: qgscalloutwidget.h:34
QgsSymbolButton::changed
void changed()
Emitted when the symbol's settings are changed.
QgsCallout::OffsetFromAnchor
@ OffsetFromAnchor
Distance to offset lines from anchor points.
Definition: qgscallout.h:72
QgsProperty
A store for object properties.
Definition: qgsproperty.h:231
QgsCalloutWidget::createExpressionContext
QgsExpressionContext createExpressionContext() const override
This method needs to be reimplemented in all classes which implement this interface and return an exp...
Definition: qgscalloutwidget.cpp:25
QgsExpressionContext::EXPR_ORIGINAL_VALUE
static const QString EXPR_ORIGINAL_VALUE
Inbuilt variable name for value original value variable.
Definition: qgsexpressioncontext.h:721
QgsCallout::AnchorPoint
AnchorPoint
Feature's anchor point position.
Definition: qgscallout.h:87
QgsCallout
Abstract base class for callout renderers.
Definition: qgscallout.h:46
QgsExpressionContextScope::addVariable
void addVariable(const QgsExpressionContextScope::StaticVariable &variable)
Adds a variable into the context scope.
Definition: qgsexpressioncontext.cpp:93
QgsPropertyOverrideButton::changed
void changed()
Emitted when property definition changes.
QgsAuxiliaryLayer::exists
bool exists(const QgsPropertyDefinition &definition) const
Returns true if the property is stored in the layer already, false otherwise.
Definition: qgsauxiliarystorage.cpp:135
QgsUnitTypes::RenderPoints
@ RenderPoints
Points (e.g., for font sizes)
Definition: qgsunittypes.h:172
QgsExpressionContext::setOriginalValueVariable
void setOriginalValueVariable(const QVariant &value)
Sets the original value variable value for the context.
Definition: qgsexpressioncontext.cpp:566
QgsCallout::propertyDefinitions
static QgsPropertiesDefinition propertyDefinitions()
Returns the definitions for data defined properties available for use in callouts.
Definition: qgscallout.cpp:150
QgsSymbolWidgetContext
Definition: qgssymbolwidgetcontext.h:35
qgsnewauxiliaryfielddialog.h
QgsVectorLayer::auxiliaryLayer
QgsAuxiliaryLayer * auxiliaryLayer()
Returns the current auxiliary layer.
Definition: qgsvectorlayer.cpp:5269
QgsCallout::anchorPoint
AnchorPoint anchorPoint() const
Returns the feature's anchor point position.
Definition: qgscallout.h:289
QgsUnitTypes::RenderMillimeters
@ RenderMillimeters
Millimeters.
Definition: qgsunittypes.h:168
QgsPropertyOverrideButton::createAuxiliaryField
void createAuxiliaryField()
Emitted when creating a new auxiliary field.
QgsPropertyOverrideButton::propertyKey
int propertyKey() const
Returns the property key linked to the button.
Definition: qgspropertyoverridebutton.h:123
QgsCallout::LabelCentroid
@ LabelCentroid
The labe's centroid.
Definition: qgscallout.h:102
QgsCallout::PoleOfInaccessibility
@ PoleOfInaccessibility
The surface's pole of inaccessibility used as anchor for polygon geometries.
Definition: qgscallout.h:89
QgsCallout::LabelBottomMiddle
@ LabelBottomMiddle
Bottom middle of the label's boundary.
Definition: qgscallout.h:109
QgsCalloutWidget::setContext
virtual void setContext(const QgsSymbolWidgetContext &context)
Sets the context in which the symbol widget is shown, e.g., the associated map canvas and expression ...
Definition: qgscalloutwidget.cpp:50
QgsExpressionContext::EXPR_SYMBOL_COLOR
static const QString EXPR_SYMBOL_COLOR
Inbuilt variable name for symbol color variable.
Definition: qgsexpressioncontext.h:723
QgsCallout::AnchorPointPosition
@ AnchorPointPosition
Feature's anchor point position.
Definition: qgscallout.h:75
QgsWkbTypes::PolygonGeometry
@ PolygonGeometry
Definition: qgswkbtypes.h:143
QgsSymbolButton
Definition: qgssymbolbutton.h:41
QgsCallout::PointOnExterior
@ PointOnExterior
A point on the surface's outline closest to the label is used as anchor for polygon geometries.
Definition: qgscallout.h:90
QgsPropertyOverrideButton::setToProperty
void setToProperty(const QgsProperty &property)
Sets the widget to reflect the current state of a QgsProperty.
Definition: qgspropertyoverridebutton.cpp:286
QgsCallout::LabelMiddleRight
@ LabelMiddleRight
Middle right of the label's boundary.
Definition: qgscallout.h:107
QgsPropertyOverrideButton
Definition: qgspropertyoverridebutton.h:50
QgsCallout::LabelTopLeft
@ LabelTopLeft
Top left corner of the label's boundary.
Definition: qgscallout.h:103
qgsauxiliarystorage.h
qgsnewauxiliarylayerdialog.h
QgsCalloutWidget::vectorLayer
const QgsVectorLayer * vectorLayer() const
Returns the vector layer associated with the widget.
Definition: qgscalloutwidget.h:79
QgsCallout::LabelAnchorPointPosition
@ LabelAnchorPointPosition
Label's anchor point position.
Definition: qgscallout.h:76
QgsProperty::setField
void setField(const QString &field)
Sets the field name the property references.
Definition: qgsproperty.cpp:292
whileBlocking
QgsSignalBlocker< Object > whileBlocking(Object *object)
Temporarily blocks signals from a QObject while calling a single method from the object.
Definition: qgis.h:262
QgsPropertyOverrideButton::updateFieldLists
void updateFieldLists()
Updates list of fields.
Definition: qgspropertyoverridebutton.cpp:152
QgsCalloutWidget::callout
virtual QgsCallout * callout()=0
Returns the callout defined by the current settings in the widget.
QgsCallout::labelAnchorPoint
LabelAnchorPoint labelAnchorPoint() const
Returns the label's anchor point position.
Definition: qgscallout.h:322
QgsNewAuxiliaryFieldDialog
A dialog to create a new auxiliary field.
Definition: qgsnewauxiliaryfielddialog.h:33
qgsunitselectionwidget.h
QgsLineSymbol
Definition: qgssymbol.h:1117
QgsCallout::DrawCalloutToAllParts
@ DrawCalloutToAllParts
Whether callout lines should be drawn to all feature parts.
Definition: qgscallout.h:74
QgsCalloutWidget::registerDataDefinedButton
void registerDataDefinedButton(QgsPropertyOverrideButton *button, QgsCallout::Property key)
Registers a data defined override button.
Definition: qgscalloutwidget.cpp:71
QgsPropertyOverrideButton::toProperty
QgsProperty toProperty() const
Returns a QgsProperty object encapsulating the current state of the widget.
Definition: qgspropertyoverridebutton.cpp:210
QgsPropertyDefinition
Definition for a property.
Definition: qgsproperty.h:47
QgsCallout::Centroid
@ Centroid
The surface's centroid is used as anchor for polygon geometries.
Definition: qgscallout.h:92
QgsUnitSelectionWidget::changed
void changed()
QgsSymbolWidgetContext::expressionContext
QgsExpressionContext * expressionContext() const
Returns the expression context used for the widget, if set.
Definition: qgssymbolwidgetcontext.cpp:77
QgsSimpleLineCallout
A simple direct line callout style.
Definition: qgscallout.h:401
QgsPropertyOverrideButton::init
void init(int propertyKey, const QgsProperty &property, const QgsPropertiesDefinition &definitions, const QgsVectorLayer *layer=nullptr, bool auxiliaryStorageEnabled=false)
Initialize a newly constructed property button (useful if button was included in a UI layout).
Definition: qgspropertyoverridebutton.cpp:96
QgsExpressionContextScope
Single scope for storing variables and functions for use within a QgsExpressionContext....
Definition: qgsexpressioncontext.h:111
QgsUnitTypes::RenderPixels
@ RenderPixels
Pixels.
Definition: qgsunittypes.h:170
QgsExpressionContext::appendScope
void appendScope(QgsExpressionContextScope *scope)
Appends a scope to the end of the context.
Definition: qgsexpressioncontext.cpp:490
qgsvectorlayer.h
QgsCallout::LabelBottomLeft
@ LabelBottomLeft
Bottom left corner of the label's boundary.
Definition: qgscallout.h:108
qgscallout.h
qgscalloutwidget.h
QgsExpressionContextUtils::updateSymbolScope
static QgsExpressionContextScope * updateSymbolScope(const QgsSymbol *symbol, QgsExpressionContextScope *symbolScope=nullptr)
Updates a symbol scope related to a QgsSymbol to an expression context.
Definition: qgsexpressioncontextutils.cpp:458
QgsWkbTypes::GeometryType
GeometryType
The geometry types are used to group QgsWkbTypes::Type in a coarse way.
Definition: qgswkbtypes.h:139
QgsVectorLayer
Definition: qgsvectorlayer.h:385
QgsPropertyOverrideButton::registerExpressionContextGenerator
void registerExpressionContextGenerator(QgsExpressionContextGenerator *generator)
Register an expression context generator class that will be used to retrieve an expression context fo...
Definition: qgspropertyoverridebutton.cpp:954
QgsCallout::MinimumCalloutLength
@ MinimumCalloutLength
Minimum length of callouts.
Definition: qgscallout.h:71
QgsUnitTypes::RenderMetersInMapUnits
@ RenderMetersInMapUnits
Meters value as Map units.
Definition: qgsunittypes.h:175
QgsSymbol::Line
@ Line
Line symbol.
Definition: qgssymbol.h:88
QgsCallout::LabelMiddleLeft
@ LabelMiddleLeft
Middle left of the label's boundary.
Definition: qgscallout.h:106
QgsAuxiliaryLayer::nameFromProperty
static QString nameFromProperty(const QgsPropertyDefinition &def, bool joined=false)
Returns the name of the auxiliary field for a property definition.
Definition: qgsauxiliarystorage.cpp:366
QgsCallout::LabelBottomRight
@ LabelBottomRight
Bottom right corner of the label's boundary.
Definition: qgscallout.h:110
QgsExpressionContext::setHighlightedVariables
void setHighlightedVariables(const QStringList &variableNames)
Sets the list of variable names within the context intended to be highlighted to the user.
Definition: qgsexpressioncontext.cpp:324
QgsSymbolWidgetContext::messageBar
QgsMessageBar * messageBar() const
Returns the message bar associated with the widget.
Definition: qgssymbolwidgetcontext.cpp:64
QgsCallout::LabelTopMiddle
@ LabelTopMiddle
Top middle of the label's boundary.
Definition: qgscallout.h:104
QgsPropertyCollection::setProperty
void setProperty(int key, const QgsProperty &property)
Adds a property to the collection and takes ownership of it.
Definition: qgspropertycollection.cpp:177
QgsCallout::Property
Property
Data definable properties.
Definition: qgscallout.h:69
QgsUnitTypes::RenderUnitList
QList< QgsUnitTypes::RenderUnit > RenderUnitList
List of render units.
Definition: qgsunittypes.h:239
QgsExpressionContextScope::StaticVariable
Single variable definition for use within a QgsExpressionContextScope.
Definition: qgsexpressioncontext.h:118
QgsCalloutWidget::changed
void changed()
Should be emitted whenever configuration changes happened on this symbol layer configuration.
QgsCallout::clone
virtual QgsCallout * clone() const =0
Duplicates a callout by creating a deep copy of the callout.
QgsCallout::LabelAnchorPoint
LabelAnchorPoint
Label's anchor point position.
Definition: qgscallout.h:99
QgsUnitTypes::RenderMapUnits
@ RenderMapUnits
Map units.
Definition: qgsunittypes.h:169
QgsNewAuxiliaryLayerDialog
A dialog to create a new auxiliary layer.
Definition: qgsnewauxiliarylayerdialog.h:34
QgsCallout::OffsetFromLabel
@ OffsetFromLabel
Distance to offset lines from label area.
Definition: qgscallout.h:73
QgsSymbolWidgetContext::additionalExpressionContextScopes
QList< QgsExpressionContextScope > additionalExpressionContextScopes() const
Returns the list of additional expression context scopes to show as available within the layer.
Definition: qgssymbolwidgetcontext.cpp:87
QgsCallout::dataDefinedProperties
QgsPropertyCollection & dataDefinedProperties()
Returns a reference to the callout's property collection, used for data defined overrides.
Definition: qgscallout.h:259
QgsCalloutWidget::context
QgsSymbolWidgetContext context() const
Returns the context in which the symbol widget is shown, e.g., the associated map canvas and expressi...
Definition: qgscalloutwidget.cpp:66
QgsCallout::PointOnSurface
@ PointOnSurface
A point guaranteed to be on the surface is used as anchor for polygon geometries.
Definition: qgscallout.h:91
QgsCallout::LabelTopRight
@ LabelTopRight
Top right corner of the label's boundary.
Definition: qgscallout.h:105