QGIS API Documentation 3.41.0-Master (d5b93354e9c)
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qgsgradientcolorrampdialog.cpp
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1/***************************************************************************
2 qgsgradientcolorrampdialog.cpp
3 ---------------------
4 begin : November 2009
5 copyright : (C) 2009 by Martin Dobias
6 email : wonder dot sk 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 "qgsgradientcolorrampdialog.h"
17#include "moc_qgsgradientcolorrampdialog.cpp"
18
19#include "qgsdialog.h"
20#include "qgscptcityarchive.h"
21#include "qgssettings.h"
22#include "qgsgui.h"
23
24#include <QColorDialog>
25#include <QHeaderView>
26#include <QInputDialog>
27#include <QPainter>
28#include <QTableWidget>
29#include <QTextEdit>
30
31// QWT Charting widget
32#include <qwt_global.h>
33#include <qwt_plot_canvas.h>
34#include <qwt_plot.h>
35#include <qwt_plot_curve.h>
36#include <qwt_plot_grid.h>
37#include <qwt_plot_marker.h>
38#include <qwt_plot_picker.h>
39#include <qwt_picker_machine.h>
40#include <qwt_plot_layout.h>
41#include <qwt_symbol.h>
42#include <qwt_legend.h>
43#include <qwt_scale_div.h>
44#include <qwt_scale_map.h>
45
46QgsGradientColorRampDialog::QgsGradientColorRampDialog( const QgsGradientColorRamp &ramp, QWidget *parent )
47 : QDialog( parent )
48 , mRamp( ramp )
49 , mCurrentPlotColorComponent( -1 )
50 , mCurrentPlotMarkerIndex( 0 )
51{
52 setupUi( this );
53 QgsGui::enableAutoGeometryRestore( this );
54
55 mColorWidget->setColorModelEditable( false );
56
57 mStopColorSpec->addItem( tr( "RGB" ), static_cast<int>( QColor::Spec::Rgb ) );
58 mStopColorSpec->addItem( tr( "HSV" ), static_cast<int>( QColor::Spec::Hsv ) );
59 mStopColorSpec->addItem( tr( "HSL" ), static_cast<int>( QColor::Spec::Hsl ) );
60 mStopColorSpec->addItem( tr( "CMYK" ), static_cast<int>( QColor::Spec::Cmyk ) );
61 mStopColorSpec->setCurrentIndex( mStopColorSpec->findData( static_cast<int>( ramp.colorSpec() ) ) );
62
63 mStopDirection->addItem( tr( "Clockwise" ), static_cast<int>( Qgis::AngularDirection::Clockwise ) );
64 mStopDirection->addItem( tr( "Counterclockwise" ), static_cast<int>( Qgis::AngularDirection::CounterClockwise ) );
65 mStopDirection->setCurrentIndex( mStopColorSpec->findData( static_cast<int>( ramp.direction() ) ) );
66
67 mStopDirection->setEnabled( hasDirection( static_cast<QColor::Spec>( mStopColorSpec->currentData().toInt() ) ) );
68
69 connect( mStopColorSpec, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, [=] {
70 const QColor::Spec colorSpec = static_cast<QColor::Spec>( mStopColorSpec->currentData().toInt() );
71 mStopDirection->setEnabled( hasDirection( colorSpec ) );
72
73 if ( colorSpec != mColorWidget->color().spec() )
74 {
75 mColorWidget->setColor( mColorWidget->color().convertTo( colorSpec ) );
76 }
77
78 if ( mBlockChanges )
79 return;
80
81 mStopEditor->setSelectedStopColorSpec( colorSpec );
82 } );
83
84 connect( mStopDirection, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, [=] {
85 if ( mBlockChanges )
86 return;
87
88 mStopEditor->setSelectedStopDirection( static_cast<Qgis::AngularDirection>( mStopDirection->currentData().toInt() ) );
89 } );
90
91 connect( cboType, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsGradientColorRampDialog::cboType_currentIndexChanged );
92 connect( btnInformation, &QPushButton::pressed, this, &QgsGradientColorRampDialog::btnInformation_pressed );
93 connect( mPositionSpinBox, static_cast<void ( QDoubleSpinBox::* )( double )>( &QDoubleSpinBox::valueChanged ), this, &QgsGradientColorRampDialog::mPositionSpinBox_valueChanged );
94 connect( mPlotHueCheckbox, &QCheckBox::toggled, this, &QgsGradientColorRampDialog::mPlotHueCheckbox_toggled );
95 connect( mPlotLightnessCheckbox, &QCheckBox::toggled, this, &QgsGradientColorRampDialog::mPlotLightnessCheckbox_toggled );
96 connect( mPlotSaturationCheckbox, &QCheckBox::toggled, this, &QgsGradientColorRampDialog::mPlotSaturationCheckbox_toggled );
97 connect( mPlotAlphaCheckbox, &QCheckBox::toggled, this, &QgsGradientColorRampDialog::mPlotAlphaCheckbox_toggled );
98#ifdef Q_OS_MAC
99 setWindowModality( Qt::WindowModal );
100#endif
101
102 mPositionSpinBox->setShowClearButton( false );
103 btnColor1->setAllowOpacity( true );
104 btnColor1->setColorDialogTitle( tr( "Select Ramp Color" ) );
105 btnColor1->setContext( QStringLiteral( "symbology" ) );
106 btnColor1->setShowNoColor( true );
107 btnColor1->setNoColorString( tr( "Transparent" ) );
108 btnColor2->setAllowOpacity( true );
109 btnColor2->setColorDialogTitle( tr( "Select Ramp Color" ) );
110 btnColor2->setContext( QStringLiteral( "symbology" ) );
111 btnColor2->setShowNoColor( true );
112 btnColor2->setNoColorString( tr( "Transparent" ) );
113 updateColorButtons();
114 connect( btnColor1, &QgsColorButton::colorChanged, this, &QgsGradientColorRampDialog::setColor1 );
115 connect( btnColor2, &QgsColorButton::colorChanged, this, &QgsGradientColorRampDialog::setColor2 );
116
117 // fill type combobox
118 cboType->blockSignals( true );
119 cboType->addItem( tr( "Discrete" ) );
120 cboType->addItem( tr( "Continuous" ) );
121 if ( mRamp.isDiscrete() )
122 cboType->setCurrentIndex( 0 );
123 else
124 cboType->setCurrentIndex( 1 );
125 cboType->blockSignals( false );
126
127 if ( mRamp.info().isEmpty() )
128 btnInformation->setEnabled( false );
129
130 mStopEditor->setGradientRamp( mRamp );
131 connect( mStopEditor, &QgsGradientStopEditor::changed, this, &QgsGradientColorRampDialog::updateRampFromStopEditor );
132
133 connect( mColorWidget, &QgsCompoundColorWidget::currentColorChanged, this, &QgsGradientColorRampDialog::colorWidgetChanged );
134 connect( mDeleteStopButton, &QAbstractButton::clicked, mStopEditor, &QgsGradientStopEditor::deleteSelectedStop );
135
136 // hide the ugly canvas frame
137 mPlot->setFrameStyle( QFrame::NoFrame );
138 QFrame *plotCanvasFrame = dynamic_cast<QFrame *>( mPlot->canvas() );
139 if ( plotCanvasFrame )
140 plotCanvasFrame->setFrameStyle( QFrame::NoFrame );
141
142 mPlot->setAxisScale( QwtPlot::yLeft, 0.0, 1.0 );
143 mPlot->enableAxis( QwtPlot::yLeft, false );
144
145 // add a grid
146 QwtPlotGrid *grid = new QwtPlotGrid();
147 QwtScaleDiv gridDiv( 0.0, 1.0, QList<double>(), QList<double>(), QList<double>() << 0.2 << 0.4 << 0.6 << 0.8 );
148 grid->setXDiv( gridDiv );
149 grid->setYDiv( gridDiv );
150 grid->setPen( QPen( QColor( 0, 0, 0, 50 ) ) );
151 grid->attach( mPlot );
152
153 mLightnessCurve = new QwtPlotCurve();
154 mLightnessCurve->setTitle( tr( "Lightness" ) );
155 mLightnessCurve->setPen( QPen( QColor( 70, 150, 255 ), 0.0 ) ),
156 mLightnessCurve->setRenderHint( QwtPlotItem::RenderAntialiased, true );
157 mLightnessCurve->attach( mPlot );
158
159 mHueCurve = new QwtPlotCurve();
160 mHueCurve->setTitle( tr( "Hue" ) );
161 mHueCurve->setPen( QPen( QColor( 255, 215, 70 ), 0.0 ) ),
162 mHueCurve->setRenderHint( QwtPlotItem::RenderAntialiased, true );
163 mHueCurve->attach( mPlot );
164
165 mSaturationCurve = new QwtPlotCurve();
166 mSaturationCurve->setTitle( tr( "Saturation" ) );
167 mSaturationCurve->setPen( QPen( QColor( 255, 70, 150 ), 0.0 ) ),
168 mSaturationCurve->setRenderHint( QwtPlotItem::RenderAntialiased, true );
169 mSaturationCurve->attach( mPlot );
170
171 mAlphaCurve = new QwtPlotCurve();
172 mAlphaCurve->setTitle( tr( "Opacity" ) );
173 mAlphaCurve->setPen( QPen( QColor( 50, 50, 50 ), 0.0 ) ),
174 mAlphaCurve->setRenderHint( QwtPlotItem::RenderAntialiased, true );
175 mAlphaCurve->attach( mPlot );
176
177 mPlotFilter = new QgsGradientPlotEventFilter( mPlot );
178 connect( mPlotFilter, &QgsGradientPlotEventFilter::mousePress, this, &QgsGradientColorRampDialog::plotMousePress );
179 connect( mPlotFilter, &QgsGradientPlotEventFilter::mouseRelease, this, &QgsGradientColorRampDialog::plotMouseRelease );
180 connect( mPlotFilter, &QgsGradientPlotEventFilter::mouseMove, this, &QgsGradientColorRampDialog::plotMouseMove );
181
182 QgsSettings settings;
183 mPlotHueCheckbox->setChecked( settings.value( QStringLiteral( "GradientEditor/plotHue" ), false ).toBool() );
184 mPlotLightnessCheckbox->setChecked( settings.value( QStringLiteral( "GradientEditor/plotLightness" ), true ).toBool() );
185 mPlotSaturationCheckbox->setChecked( settings.value( QStringLiteral( "GradientEditor/plotSaturation" ), false ).toBool() );
186 mPlotAlphaCheckbox->setChecked( settings.value( QStringLiteral( "GradientEditor/plotAlpha" ), false ).toBool() );
187
188 mHueCurve->setVisible( mPlotHueCheckbox->isChecked() );
189 mLightnessCurve->setVisible( mPlotLightnessCheckbox->isChecked() );
190 mSaturationCurve->setVisible( mPlotSaturationCheckbox->isChecked() );
191 mAlphaCurve->setVisible( mPlotAlphaCheckbox->isChecked() );
192
193 connect( mStopEditor, &QgsGradientStopEditor::selectedStopChanged, this, &QgsGradientColorRampDialog::selectedStopChanged );
194 mStopEditor->selectStop( 0 );
195
196 connect( mButtonBox, &QDialogButtonBox::helpRequested, this, &QgsGradientColorRampDialog::showHelp );
197}
198
199QgsGradientColorRampDialog::~QgsGradientColorRampDialog()
200{
201 QgsSettings settings;
202 settings.setValue( QStringLiteral( "GradientEditor/plotHue" ), mPlotHueCheckbox->isChecked() );
203 settings.setValue( QStringLiteral( "GradientEditor/plotLightness" ), mPlotLightnessCheckbox->isChecked() );
204 settings.setValue( QStringLiteral( "GradientEditor/plotSaturation" ), mPlotSaturationCheckbox->isChecked() );
205 settings.setValue( QStringLiteral( "GradientEditor/plotAlpha" ), mPlotAlphaCheckbox->isChecked() );
206}
207
208void QgsGradientColorRampDialog::setRamp( const QgsGradientColorRamp &ramp )
209{
210 mRamp = ramp;
211
212 updateColorButtons();
213 updateStopEditor();
214 updatePlot();
215
216 emit changed();
217}
218
219QDialogButtonBox *QgsGradientColorRampDialog::buttonBox() const
220{
221 return mButtonBox;
222}
223
224void QgsGradientColorRampDialog::cboType_currentIndexChanged( int index )
225{
226 if ( ( index == 0 && mRamp.isDiscrete() ) || ( index == 1 && !mRamp.isDiscrete() ) )
227 return;
228 mRamp.convertToDiscrete( index == 0 );
229 updateColorButtons();
230 updateStopEditor();
231 updatePlot();
232
233 emit changed();
234}
235
236void QgsGradientColorRampDialog::btnInformation_pressed()
237{
238 if ( mRamp.info().isEmpty() )
239 return;
240
241 QgsDialog *dlg = new QgsDialog( this );
242 QLabel *label = nullptr;
243
244 // information table
245 QTableWidget *tableInfo = new QTableWidget( dlg );
246 tableInfo->verticalHeader()->hide();
247 tableInfo->horizontalHeader()->hide();
248 tableInfo->setRowCount( mRamp.info().count() );
249 tableInfo->setColumnCount( 2 );
250 int i = 0;
251 QgsStringMap rampInfo = mRamp.info();
252 for ( QgsStringMap::const_iterator it = rampInfo.constBegin();
253 it != rampInfo.constEnd(); ++it )
254 {
255 if ( it.key().startsWith( QLatin1String( "cpt-city" ) ) )
256 continue;
257 tableInfo->setItem( i, 0, new QTableWidgetItem( it.key() ) );
258 tableInfo->setItem( i, 1, new QTableWidgetItem( it.value() ) );
259 tableInfo->resizeRowToContents( i );
260 i++;
261 }
262 tableInfo->resizeColumnToContents( 0 );
263 tableInfo->horizontalHeader()->setStretchLastSection( true );
264 tableInfo->setRowCount( i );
265 tableInfo->setFixedHeight( tableInfo->rowHeight( 0 ) * i + 5 );
266 dlg->layout()->addWidget( tableInfo );
267 dlg->resize( 600, 250 );
268
269 dlg->layout()->addSpacing( 5 );
270
271 // gradient file
272 QString gradientFile = mRamp.info().value( QStringLiteral( "cpt-city-gradient" ) );
273 if ( !gradientFile.isNull() )
274 {
275 QString fileName = gradientFile;
276 fileName.replace( QLatin1String( "<cpt-city>" ), QgsCptCityArchive::defaultBaseDir() );
277 if ( !QFile::exists( fileName ) )
278 {
279 fileName = gradientFile;
280 fileName.replace( QLatin1String( "<cpt-city>" ), QLatin1String( "http://soliton.vm.bytemark.co.uk/pub/cpt-city" ) );
281 }
282 label = new QLabel( tr( "Gradient file : %1" ).arg( fileName ), dlg );
283 label->setTextInteractionFlags( Qt::TextBrowserInteraction );
284 dlg->layout()->addSpacing( 5 );
285 dlg->layout()->addWidget( label );
286 }
287
288 // license file
289 QString licenseFile = mRamp.info().value( QStringLiteral( "cpt-city-license" ) );
290 if ( !licenseFile.isNull() )
291 {
292 QString fileName = licenseFile;
293 fileName.replace( QLatin1String( "<cpt-city>" ), QgsCptCityArchive::defaultBaseDir() );
294 if ( !QFile::exists( fileName ) )
295 {
296 fileName = licenseFile;
297 fileName.replace( QLatin1String( "<cpt-city>" ), QLatin1String( "http://soliton.vm.bytemark.co.uk/pub/cpt-city" ) );
298 }
299 label = new QLabel( tr( "License file : %1" ).arg( fileName ), dlg );
300 label->setTextInteractionFlags( Qt::TextBrowserInteraction );
301 dlg->layout()->addSpacing( 5 );
302 dlg->layout()->addWidget( label );
303 if ( QFile::exists( fileName ) )
304 {
305 QTextEdit *textEdit = new QTextEdit( dlg );
306 textEdit->setReadOnly( true );
307 QFile file( fileName );
308 if ( file.open( QIODevice::ReadOnly | QIODevice::Text ) )
309 {
310 textEdit->setText( file.readAll() );
311 file.close();
312 dlg->layout()->addSpacing( 5 );
313 dlg->layout()->addWidget( textEdit );
314 dlg->resize( 600, 500 );
315 }
316 }
317 }
318
319 dlg->show(); //non modal
320}
321
322void QgsGradientColorRampDialog::updateColorButtons()
323{
324 btnColor1->blockSignals( true );
325 btnColor1->setColor( mRamp.color1() );
326 btnColor1->blockSignals( false );
327 btnColor2->blockSignals( true );
328 btnColor2->setColor( mRamp.color2() );
329 btnColor2->blockSignals( false );
330}
331
332void QgsGradientColorRampDialog::updateStopEditor()
333{
334 mStopEditor->blockSignals( true );
335 mStopEditor->setGradientRamp( mRamp );
336 mStopEditor->blockSignals( false );
337}
338
339void QgsGradientColorRampDialog::selectedStopChanged( const QgsGradientStop &stop )
340{
341 mBlockChanges++;
342 mColorWidget->blockSignals( true );
343 mColorWidget->setColor( stop.color );
344 mColorWidget->blockSignals( false );
345 mPositionSpinBox->blockSignals( true );
346 mPositionSpinBox->setValue( stop.offset * 100 );
347 mPositionSpinBox->blockSignals( false );
348
349 mStopColorSpec->setCurrentIndex( mStopColorSpec->findData( static_cast<int>( mStopEditor->selectedStop().colorSpec() ) ) );
350 mStopDirection->setCurrentIndex( mStopDirection->findData( static_cast<int>( mStopEditor->selectedStop().direction() ) ) );
351 mBlockChanges--;
352
353 if ( ( stop.offset == 0 && stop.color == mRamp.color1() ) || ( stop.offset == 1.0 && stop.color == mRamp.color2() ) )
354 {
355 //first/last stop can't be repositioned
356 mPositionSpinBox->setDisabled( true );
357 mDeleteStopButton->setDisabled( true );
358 }
359 else
360 {
361 mPositionSpinBox->setDisabled( false );
362 mDeleteStopButton->setDisabled( false );
363 }
364
365 // first stop cannot have color spec or direction set
366 mStopColorSpec->setEnabled( !( stop.offset == 0 && stop.color == mRamp.color1() ) );
367 mStopDirection->setEnabled( !( stop.offset == 0 && stop.color == mRamp.color1() ) && hasDirection( mStopEditor->selectedStop().colorSpec() ) );
368
369 updatePlot();
370}
371
372void QgsGradientColorRampDialog::colorWidgetChanged( const QColor &color )
373{
374 mStopEditor->setSelectedStopColor( color );
375}
376
377void QgsGradientColorRampDialog::mPositionSpinBox_valueChanged( double val )
378{
379 mStopEditor->setSelectedStopOffset( val / 100.0 );
380}
381
382void QgsGradientColorRampDialog::mPlotHueCheckbox_toggled( bool checked )
383{
384 mHueCurve->setVisible( checked );
385 updatePlot();
386}
387
388void QgsGradientColorRampDialog::mPlotLightnessCheckbox_toggled( bool checked )
389{
390 mLightnessCurve->setVisible( checked );
391 updatePlot();
392}
393
394void QgsGradientColorRampDialog::mPlotSaturationCheckbox_toggled( bool checked )
395{
396 mSaturationCurve->setVisible( checked );
397 updatePlot();
398}
399
400void QgsGradientColorRampDialog::mPlotAlphaCheckbox_toggled( bool checked )
401{
402 mAlphaCurve->setVisible( checked );
403 updatePlot();
404}
405
406void QgsGradientColorRampDialog::plotMousePress( QPointF point )
407{
408 //find closest part
409
410 double minDist = 1;
411 mCurrentPlotColorComponent = -1;
412 mCurrentPlotMarkerIndex = -1;
413 // first color
414
415 for ( int i = 0; i < mRamp.count(); ++i )
416 {
417 QColor currentCol;
418 double currentOff = 0.0;
419 if ( i == 0 )
420 {
421 currentOff = 0.0;
422 currentCol = mRamp.color1();
423 }
424 else if ( i == mRamp.count() - 1 )
425 {
426 currentOff = 1.0;
427 currentCol = mRamp.color2();
428 }
429 else
430 {
431 currentOff = mRamp.stops().at( i - 1 ).offset;
432 currentCol = mRamp.stops().at( i - 1 ).color;
433 }
434
435 double currentDist;
436 if ( mPlotHueCheckbox->isChecked() )
437 {
438 currentDist = std::pow( point.x() - currentOff, 2.0 ) + std::pow( point.y() - currentCol.hslHueF(), 2.0 );
439 if ( currentDist < minDist )
440 {
441 minDist = currentDist;
442 mCurrentPlotColorComponent = 0;
443 mCurrentPlotMarkerIndex = i;
444 }
445 }
446 if ( mPlotLightnessCheckbox->isChecked() )
447 {
448 currentDist = std::pow( point.x() - currentOff, 2.0 ) + std::pow( point.y() - currentCol.lightnessF(), 2.0 );
449 if ( currentDist < minDist )
450 {
451 minDist = currentDist;
452 mCurrentPlotColorComponent = 1;
453 mCurrentPlotMarkerIndex = i;
454 }
455 }
456 if ( mPlotSaturationCheckbox->isChecked() )
457 {
458 currentDist = std::pow( point.x() - currentOff, 2.0 ) + std::pow( point.y() - currentCol.hslSaturationF(), 2.0 );
459 if ( currentDist < minDist )
460 {
461 minDist = currentDist;
462 mCurrentPlotColorComponent = 2;
463 mCurrentPlotMarkerIndex = i;
464 }
465 }
466 if ( mPlotAlphaCheckbox->isChecked() )
467 {
468 currentDist = std::pow( point.x() - currentOff, 2.0 ) + std::pow( point.y() - currentCol.alphaF(), 2.0 );
469 if ( currentDist < minDist )
470 {
471 minDist = currentDist;
472 mCurrentPlotColorComponent = 3;
473 mCurrentPlotMarkerIndex = i;
474 }
475 }
476 }
477
478 // watch out - selected stop index may differ if stops in editor are out of order!!!
479 if ( mCurrentPlotMarkerIndex >= 0 )
480 mStopEditor->selectStop( mCurrentPlotMarkerIndex );
481}
482
483void QgsGradientColorRampDialog::plotMouseRelease( QPointF )
484{
485 mCurrentPlotColorComponent = -1;
486}
487
488void QgsGradientColorRampDialog::plotMouseMove( QPointF point )
489{
490 QColor newColor = mStopEditor->selectedStop().color;
491
492 if ( mCurrentPlotColorComponent == 0 )
493 newColor = QColor::fromHslF( std::clamp( point.y(), qreal( 0.0 ), qreal( 1.0 ) ), newColor.hslSaturationF(), newColor.lightnessF(), newColor.alphaF() );
494 else if ( mCurrentPlotColorComponent == 1 )
495 newColor = QColor::fromHslF( newColor.hslHueF(), newColor.hslSaturationF(), std::clamp( point.y(), qreal( 0.0 ), qreal( 1.0 ) ), newColor.alphaF() );
496 else if ( mCurrentPlotColorComponent == 2 )
497 newColor = QColor::fromHslF( newColor.hslHueF(), std::clamp( point.y(), qreal( 0.0 ), qreal( 1.0 ) ), newColor.lightnessF(), newColor.alphaF() );
498 else if ( mCurrentPlotColorComponent == 3 )
499 newColor = QColor::fromHslF( newColor.hslHueF(), newColor.hslSaturationF(), newColor.lightnessF(), std::clamp( point.y(), qreal( 0.0 ), qreal( 1.0 ) ) );
500
501 mStopEditor->setSelectedStopDetails( newColor, std::clamp( point.x(), qreal( 0.0 ), qreal( 1.0 ) ) );
502}
503
504bool byX( QPointF p1, QPointF p2 )
505{
506 return p1.x() < p2.x();
507}
508
509void QgsGradientColorRampDialog::addPlotMarker( double x, double y, const QColor &color, bool isSelected )
510{
511 QColor borderColor = color.darker( 200 );
512 borderColor.setAlpha( 255 );
513
514 QColor brushColor = color;
515 brushColor.setAlpha( 255 );
516
517 QwtPlotMarker *marker = new QwtPlotMarker();
518 marker->setSymbol( new QwtSymbol( QwtSymbol::Ellipse, QBrush( brushColor ), QPen( borderColor, isSelected ? 2 : 1 ), QSize( 8, 8 ) ) );
519 marker->setValue( x, y );
520 marker->attach( mPlot );
521 marker->setRenderHint( QwtPlotItem::RenderAntialiased, true );
522 mMarkers << marker;
523}
524
525void QgsGradientColorRampDialog::addMarkersForColor( double x, const QColor &color, bool isSelected )
526{
527 if ( mPlotHueCheckbox->isChecked() )
528 addPlotMarker( x, color.hslHueF(), color, isSelected && mCurrentPlotColorComponent == 0 );
529 if ( mPlotLightnessCheckbox->isChecked() )
530 addPlotMarker( x, color.lightnessF(), color, isSelected && mCurrentPlotColorComponent == 1 );
531 if ( mPlotSaturationCheckbox->isChecked() )
532 addPlotMarker( x, color.hslSaturationF(), color, isSelected && mCurrentPlotColorComponent == 2 );
533 if ( mPlotAlphaCheckbox->isChecked() )
534 addPlotMarker( x, color.alphaF(), color, isSelected && mCurrentPlotColorComponent == 3 );
535}
536
537bool QgsGradientColorRampDialog::hasDirection( QColor::Spec colorSpec )
538{
539 switch ( colorSpec )
540 {
541 case QColor::Spec::Rgb:
542 case QColor::Spec::ExtendedRgb:
543 case QColor::Spec::Cmyk:
544 case QColor::Spec::Invalid:
545 return false;
546
547 case QColor::Spec::Hsv:
548 case QColor::Spec::Hsl:
549 return true;
550 }
551
552 BUILTIN_UNREACHABLE
553}
554
555void QgsGradientColorRampDialog::updatePlot()
556{
557 // remove existing markers
558 const auto constMMarkers = mMarkers;
559 for ( QwtPlotMarker *marker : constMMarkers )
560 {
561 marker->detach();
562 delete marker;
563 }
564 mMarkers.clear();
565
566 QPolygonF lightnessPoints;
567 QPolygonF huePoints;
568 QPolygonF saturationPoints;
569 QPolygonF alphaPoints;
570 lightnessPoints << QPointF( 0.0, mRamp.color1().lightnessF() );
571 huePoints << QPointF( 0.0, mRamp.color1().hslHueF() );
572 saturationPoints << QPointF( 0.0, mRamp.color1().hslSaturationF() );
573 alphaPoints << QPointF( 0.0, mRamp.color1().alphaF() );
574 addMarkersForColor( 0, mRamp.color1(), mCurrentPlotMarkerIndex == 0 );
575
576 int i = 1;
577 const auto constStops = mRamp.stops();
578 for ( const QgsGradientStop &stop : constStops )
579 {
580 lightnessPoints << QPointF( stop.offset, stop.color.lightnessF() );
581 huePoints << QPointF( stop.offset, stop.color.hslHueF() );
582 saturationPoints << QPointF( stop.offset, stop.color.hslSaturationF() );
583 alphaPoints << QPointF( stop.offset, stop.color.alphaF() );
584
585 addMarkersForColor( stop.offset, stop.color, mCurrentPlotMarkerIndex == i );
586 i++;
587 }
588
589 //add extra intermediate points
590 for ( double p = 0.001; p < 1.0; p += 0.001 )
591 {
592 QColor c = mRamp.color( p );
593 lightnessPoints << QPointF( p, c.lightnessF() );
594 huePoints << QPointF( p, c.hslHueF() );
595 saturationPoints << QPointF( p, c.hslSaturationF() );
596 alphaPoints << QPointF( p, c.alphaF() );
597 }
598
599 lightnessPoints << QPointF( 1.0, mRamp.color2().lightnessF() );
600 huePoints << QPointF( 1.0, mRamp.color2().hslHueF() );
601 saturationPoints << QPointF( 1.0, mRamp.color2().hslSaturationF() );
602 alphaPoints << QPointF( 1.0, mRamp.color2().alphaF() );
603 addMarkersForColor( 1.0, mRamp.color2(), mCurrentPlotMarkerIndex == i );
604
605 std::sort( lightnessPoints.begin(), lightnessPoints.end(), byX );
606 std::sort( huePoints.begin(), huePoints.end(), byX );
607 std::sort( saturationPoints.begin(), saturationPoints.end(), byX );
608 std::sort( alphaPoints.begin(), alphaPoints.end(), byX );
609
610 mLightnessCurve->setSamples( lightnessPoints );
611 mHueCurve->setSamples( huePoints );
612 mSaturationCurve->setSamples( saturationPoints );
613 mAlphaCurve->setSamples( alphaPoints );
614 mPlot->replot();
615}
616
617void QgsGradientColorRampDialog::updateRampFromStopEditor()
618{
619 mRamp = mStopEditor->gradientRamp();
620
621 mBlockChanges++;
622 mPositionSpinBox->blockSignals( true );
623 mPositionSpinBox->setValue( mStopEditor->selectedStop().offset * 100 );
624 mPositionSpinBox->blockSignals( false );
625 mColorWidget->blockSignals( true );
626 mColorWidget->setColor( mStopEditor->selectedStop().color );
627 mColorWidget->blockSignals( false );
628
629 mStopColorSpec->setCurrentIndex( mStopColorSpec->findData( static_cast<int>( mStopEditor->selectedStop().colorSpec() ) ) );
630 mStopDirection->setCurrentIndex( mStopDirection->findData( static_cast<int>( mStopEditor->selectedStop().direction() ) ) );
631 mBlockChanges--;
632
633 // first stop cannot have color spec or direction set
634 mStopColorSpec->setEnabled( !( mStopEditor->selectedStop().offset == 0 && mStopEditor->selectedStop().color == mRamp.color1() ) );
635 mStopDirection->setEnabled( !( mStopEditor->selectedStop().offset == 0 && mStopEditor->selectedStop().color == mRamp.color1() ) && hasDirection( mStopEditor->selectedStop().colorSpec() ) );
636
637 updateColorButtons();
638 updatePlot();
639
640 emit changed();
641}
642
643void QgsGradientColorRampDialog::setColor1( const QColor &color )
644{
645 mStopEditor->setColor1( color );
646 updateColorButtons();
647}
648
649void QgsGradientColorRampDialog::setColor2( const QColor &color )
650{
651 mStopEditor->setColor2( color );
652 updateColorButtons();
653}
654
655void QgsGradientColorRampDialog::showHelp()
656{
657 QgsHelp::openHelp( QStringLiteral( "style_library/style_manager.html#setting-a-color-ramp" ) );
658}
659
660
662
663QgsGradientPlotEventFilter::QgsGradientPlotEventFilter( QwtPlot *plot )
664 : QObject( plot )
665 , mPlot( plot )
666{
667 mPlot->canvas()->installEventFilter( this );
668}
669
670bool QgsGradientPlotEventFilter::eventFilter( QObject *object, QEvent *event )
671{
672 if ( !mPlot->isEnabled() )
673 return QObject::eventFilter( object, event );
674
675 switch ( event->type() )
676 {
677 case QEvent::MouseButtonPress:
678 {
679 const QMouseEvent *mouseEvent = static_cast<QMouseEvent *>( event );
680 if ( mouseEvent->button() == Qt::LeftButton )
681 {
682 emit mousePress( mapPoint( mouseEvent->pos() ) );
683 }
684 break;
685 }
686 case QEvent::MouseMove:
687 {
688 const QMouseEvent *mouseEvent = static_cast<QMouseEvent *>( event );
689 if ( mouseEvent->buttons() & Qt::LeftButton )
690 {
691 // only emit when button pressed
692 emit mouseMove( mapPoint( mouseEvent->pos() ) );
693 }
694 break;
695 }
696 case QEvent::MouseButtonRelease:
697 {
698 const QMouseEvent *mouseEvent = static_cast<QMouseEvent *>( event );
699 if ( mouseEvent->button() == Qt::LeftButton )
700 {
701 emit mouseRelease( mapPoint( mouseEvent->pos() ) );
702 }
703 break;
704 }
705 default:
706 break;
707 }
708
709 return QObject::eventFilter( object, event );
710}
711
712QPointF QgsGradientPlotEventFilter::mapPoint( QPointF point ) const
713{
714 if ( !mPlot )
715 return QPointF();
716
717 return QPointF( mPlot->canvasMap( QwtPlot::xBottom ).invTransform( point.x() ), mPlot->canvasMap( QwtPlot::yLeft ).invTransform( point.y() ) );
718}
719
Qgis::AngularDirection
AngularDirection
Angular directions.
Definition qgis.h:3228
Qgis::AngularDirection::CounterClockwise
@ CounterClockwise
Counter-clockwise direction.
Qgis::AngularDirection::Clockwise
@ Clockwise
Clockwise direction.
QgsColorButton::colorChanged
void colorChanged(const QColor &color)
Emitted whenever a new color is set for the button.
QgsCompoundColorWidget::currentColorChanged
void currentColorChanged(const QColor &color)
Emitted when the dialog's color changes.
QgsCptCityArchive::defaultBaseDir
static QString defaultBaseDir()
Definition qgscptcityarchive.cpp:132
QgsDialog
A generic dialog with layout and button box.
Definition qgsdialog.h:34
QgsDialog::layout
QVBoxLayout * layout()
Returns the central layout. Widgets added to it must have this dialog as parent.
Definition qgsdialog.h:43
QgsGradientColorRampDialog::buttonBox
QDialogButtonBox * buttonBox() const
Returns a reference to the dialog's button box.
Definition qgsgradientcolorrampdialog.cpp:219
QgsGradientColorRampDialog::setColor2
void setColor2(const QColor &color)
Sets the end color for the gradient ramp.
Definition qgsgradientcolorrampdialog.cpp:649
QgsGradientColorRampDialog::setRamp
void setRamp(const QgsGradientColorRamp &ramp)
Sets the color ramp to show in the dialog.
Definition qgsgradientcolorrampdialog.cpp:208
QgsGradientColorRampDialog::QgsGradientColorRampDialog
QgsGradientColorRampDialog(const QgsGradientColorRamp &ramp, QWidget *parent=nullptr)
Constructor for QgsGradientColorRampDialog.
Definition qgsgradientcolorrampdialog.cpp:46
QgsGradientColorRampDialog::setColor1
void setColor1(const QColor &color)
Sets the start color for the gradient ramp.
Definition qgsgradientcolorrampdialog.cpp:643
QgsGradientColorRampDialog::changed
void changed()
Emitted when the dialog settings change.
QgsGradientColorRamp
Gradient color ramp, which smoothly interpolates between two colors and also supports optional extra ...
Definition qgscolorrampimpl.h:135
QgsGradientColorRamp::isDiscrete
bool isDiscrete() const
Returns true if the gradient is using discrete interpolation, rather than smoothly interpolating betw...
Definition qgscolorrampimpl.h:205
QgsGradientColorRamp::count
int count() const override
Returns number of defined colors, or -1 if undefined.
Definition qgscolorrampimpl.h:154
QgsGradientColorRamp::info
QgsStringMap info() const
Returns any additional info attached to the gradient ramp (e.g., authorship notes)
Definition qgscolorrampimpl.h:244
QgsGradientColorRamp::convertToDiscrete
void convertToDiscrete(bool discrete)
Converts a gradient with existing color stops to or from discrete interpolation.
Definition qgscolorrampimpl.cpp:517
QgsGradientColorRamp::colorSpec
QColor::Spec colorSpec() const
Returns the color specification in which the color component interpolation will occur.
Definition qgscolorrampimpl.h:270
QgsGradientColorRamp::color
QColor color(double value) const override
Returns the color corresponding to a specified value.
Definition qgscolorrampimpl.cpp:348
QgsGradientColorRamp::color1
QColor color1() const
Returns the gradient start color.
Definition qgscolorrampimpl.h:175
QgsGradientColorRamp::direction
Qgis::AngularDirection direction() const
Returns the direction to traverse the color wheel using when interpolating hue-based color specificat...
Definition qgscolorrampimpl.h:295
QgsGradientColorRamp::stops
QgsGradientStopsList stops() const
Returns the list of intermediate gradient stops for the ramp.
Definition qgscolorrampimpl.h:238
QgsGradientColorRamp::color2
QColor color2() const
Returns the gradient end color.
Definition qgscolorrampimpl.h:182
QgsGradientStopEditor::changed
void changed()
Emitted when the gradient ramp is changed by a user.
QgsGradientStopEditor::deleteSelectedStop
void deleteSelectedStop()
Deletes the current selected stop.
Definition qgsgradientstopeditor.cpp:264
QgsGradientStopEditor::selectedStopChanged
void selectedStopChanged(const QgsGradientStop &stop)
Emitted when the current selected stop changes.
QgsGradientStop
Represents a color stop within a QgsGradientColorRamp color ramp.
Definition qgscolorrampimpl.h:38
QgsGradientStop::offset
double offset
Relative positional offset, between 0 and 1.
Definition qgscolorrampimpl.h:49
QgsGradientStop::color
QColor color
Gradient color at stop.
Definition qgscolorrampimpl.h:51
QgsGui::enableAutoGeometryRestore
static void enableAutoGeometryRestore(QWidget *widget, const QString &key=QString())
Register the widget to allow its position to be automatically saved and restored when open and closed...
Definition qgsgui.cpp:210
QgsHelp::openHelp
static void openHelp(const QString &key)
Opens help topic for the given help key using default system web browser.
Definition qgshelp.cpp:39
QgsSettings
This class is a composition of two QSettings instances:
Definition qgssettings.h:64
QgsSettings::value
QVariant value(const QString &key, const QVariant &defaultValue=QVariant(), Section section=NoSection) const
Returns the value for setting key.
Definition qgssettings.cpp:175
QgsSettings::setValue
void setValue(const QString &key, const QVariant &value, QgsSettings::Section section=QgsSettings::NoSection)
Sets the value of setting key to value.
Definition qgssettings.cpp:304
c
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into c
Definition porting_processing.dox:1
BUILTIN_UNREACHABLE
#define BUILTIN_UNREACHABLE
Definition qgis.h:6678
QgsStringMap
QMap< QString, QString > QgsStringMap
Definition qgis.h:6562
byX
bool byX(QPointF p1, QPointF p2)
Definition qgsgradientcolorrampdialog.cpp:504
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