16#include <QIntValidator>
21#include <QRegularExpression>
40 , TRSTRING_NOT_SET( tr(
"Not Set" ) )
41 , mRasterLayer( layer )
42 , mMapCanvas( canvas )
45 connect( pbnAddValuesFromDisplay, &QToolButton::clicked,
this, &QgsRasterTransparencyWidget::pbnAddValuesFromDisplay_clicked );
46 connect( pbnAddValuesManually, &QToolButton::clicked,
this, &QgsRasterTransparencyWidget::pbnAddValuesManually_clicked );
47 connect( pbnDefaultValues, &QToolButton::clicked,
this, &QgsRasterTransparencyWidget::pbnDefaultValues_clicked );
48 connect( pbnExportTransparentPixelValues, &QToolButton::clicked,
this, &QgsRasterTransparencyWidget::pbnExportTransparentPixelValues_clicked );
49 connect( pbnImportTransparentPixelValues, &QToolButton::clicked,
this, &QgsRasterTransparencyWidget::pbnImportTransparentPixelValues_clicked );
50 connect( pbnRemoveSelectedRow, &QToolButton::clicked,
this, &QgsRasterTransparencyWidget::pbnRemoveSelectedRow_clicked );
52 mNodataColorButton->setShowNoColor(
true );
53 mNodataColorButton->setColorDialogTitle( tr(
"Select NoData Color" ) );
60 leNoDataValue->setValidator(
new QgsDoubleValidator( std::numeric_limits<double>::lowest(), std::numeric_limits<double>::max(),
this ) );
63 mPixelSelectorTool =
nullptr;
71 pbnAddValuesFromDisplay->setEnabled(
false );
88 expContext = canvas->createExpressionContext();
120 gboxNoDataValue->setEnabled(
false );
121 gboxCustomTransparency->setEnabled(
false );
124 cboxTransparencyBand->setShowNotSetOption(
true, tr(
"None" ) );
125 cboxTransparencyBand->setLayer( mRasterLayer );
132 lblSrcNoDataValue->setText( tr(
"not defined" ) );
139 mSrcNoDataValueCheckBox->setEnabled( enableSrcNoData );
140 lblSrcNoDataValue->setEnabled( enableSrcNoData );
146 mNodataColorButton->setColor( renderer->
nodataColor() );
148 mNodataColorButton->setToNull();
150 mOpacityWidget->setOpacity( renderer->
opacity() );
152 cboxTransparencyBand->setBand( renderer->
alphaBand() );
158 QgsDebugMsgLevel( QStringLiteral(
"noDataRangeList.size = %1" ).arg( noDataRangeList.size() ), 2 );
159 if ( !noDataRangeList.isEmpty() )
162 leNoDataValue->setText( QLocale().toString( v,
'g', 20 ) );
166 leNoDataValue->setText( QString() );
171 leNoDataValue->setText( QString() );
177 populateTransparencyTable( mRasterLayer->
renderer() );
180void QgsRasterTransparencyWidget::transparencyCellTextEdited(
const QString &text )
185 switch ( mCurrentMode )
187 case Mode::SingleBand:
189 QLineEdit *lineEdit = qobject_cast<QLineEdit *>( sender() );
194 for (
int r = 0; r < tableTransparency->rowCount(); r++ )
196 for (
int c = 0;
c < tableTransparency->columnCount();
c++ )
198 if ( tableTransparency->cellWidget( r,
c ) == sender() )
208 QgsDebugMsgLevel( QStringLiteral(
"row = %1 column =%2" ).arg( row ).arg( column ), 2 );
210 if ( column ==
static_cast< int >( SingleBandTableColumns::From ) )
212 QLineEdit *toLineEdit =
dynamic_cast<QLineEdit *
>( tableTransparency->cellWidget( row,
static_cast< int >( SingleBandTableColumns::To ) ) );
216 const bool toChanged = mTransparencyToEdited.value( row );
220 toLineEdit->setText( lineEdit->text() );
223 else if ( column ==
static_cast< int >( SingleBandTableColumns::To ) )
225 setTransparencyToEdited( row );
237void QgsRasterTransparencyWidget::pbnAddValuesFromDisplay_clicked()
239 if ( mMapCanvas && mPixelSelectorTool )
245void QgsRasterTransparencyWidget::pbnAddValuesManually_clicked()
253 tableTransparency->insertRow( tableTransparency->rowCount() );
256 switch ( mCurrentMode )
258 case Mode::SingleBand:
267 for (
int i = 0; i < n; i++ )
269 setTransparencyCell( tableTransparency->rowCount() - 1, i, std::numeric_limits<double>::quiet_NaN() );
272 switch ( mCurrentMode )
274 case Mode::SingleBand:
275 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( SingleBandTableColumns::Opacity ), 100 );
279 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Opacity ), 100 );
287void QgsRasterTransparencyWidget::pbnDefaultValues_clicked()
295 const int nBands = r->
usesBands().size();
297 setupTransparencyTable( nBands );
304void QgsRasterTransparencyWidget::pbnExportTransparentPixelValues_clicked()
307 const QString myLastDir = myQSettings.
value( QStringLiteral(
"lastRasterFileFilterDir" ), QDir::homePath() ).toString();
308 QString myFileName = QFileDialog::getSaveFileName(
this, tr(
"Save Pixel Values as File" ), myLastDir, tr(
"Textfile" ) +
" (*.txt)" );
309 if ( !myFileName.isEmpty() )
311 if ( !myFileName.endsWith( QLatin1String(
".txt" ), Qt::CaseInsensitive ) )
313 myFileName = myFileName +
".txt";
316 QFile myOutputFile( myFileName );
317 if ( myOutputFile.open( QFile::WriteOnly | QIODevice::Truncate ) )
319 QTextStream myOutputStream( &myOutputFile );
320 myOutputStream <<
"# " << tr(
"QGIS Generated Transparent Pixel Value Export File" ) <<
'\n';
321 switch ( mCurrentMode )
325 myOutputStream <<
"#\n#\n# " << tr(
"Red" ) <<
"\t" << tr(
"Green" ) <<
"\t" << tr(
"Blue" ) <<
"\t" << tr(
"Percent Transparent" );
326 for (
int myTableRunner = 0; myTableRunner < tableTransparency->rowCount(); myTableRunner++ )
328 myOutputStream << '\n' << QString::number( transparencyCellValue( myTableRunner, static_cast< int >( RgbBandTableColumns::Red ) ) ) <<
"\t"
329 << QString::number( transparencyCellValue( myTableRunner,
static_cast< int >( RgbBandTableColumns::Green ) ) ) <<
"\t"
330 << QString::number( transparencyCellValue( myTableRunner,
static_cast< int >( RgbBandTableColumns::Blue ) ) ) <<
"\t"
331 << QString::number( transparencyCellValue( myTableRunner,
static_cast< int >( RgbBandTableColumns::Opacity ) ) );
335 case Mode::SingleBand:
337 myOutputStream <<
"#\n#\n# " << tr(
"Value" ) <<
"\t" << tr(
"Percent Transparent" );
339 for (
int myTableRunner = 0; myTableRunner < tableTransparency->rowCount(); myTableRunner++ )
341 myOutputStream << '\n' << QString::number( transparencyCellValue( myTableRunner, static_cast< int >( SingleBandTableColumns::From ) ) ) <<
"\t"
342 << QString::number( transparencyCellValue( myTableRunner,
static_cast< int >( SingleBandTableColumns::To ) ) ) <<
"\t"
343 << QString::number( transparencyCellValue( myTableRunner,
static_cast< int >( SingleBandTableColumns::Opacity ) ) );
351 QMessageBox::warning(
this, tr(
"Save Pixel Values as File" ), tr(
"Write access denied. Adjust the file permissions and try again.\n\n" ) );
356void QgsRasterTransparencyWidget::pbnImportTransparentPixelValues_clicked()
358 int myLineCounter = 0;
359 bool myImportError =
false;
362 const QString myLastDir = myQSettings.
value( QStringLiteral(
"lastRasterFileFilterDir" ), QDir::homePath() ).toString();
363 const QString myFileName = QFileDialog::getOpenFileName(
this, tr(
"Load Pixel Values from File" ), myLastDir, tr(
"Textfile" ) +
" (*.txt)" );
364 QFile myInputFile( myFileName );
366 const thread_local QRegularExpression sRxWhitespace(
"\\s+" );
368 if ( myInputFile.open( QFile::ReadOnly ) )
370 QTextStream myInputStream( &myInputFile );
372 switch ( mCurrentMode )
376 for (
int myTableRunner = tableTransparency->rowCount() - 1; myTableRunner >= 0; myTableRunner-- )
378 tableTransparency->removeRow( myTableRunner );
381 while ( !myInputStream.atEnd() )
384 myInputLine = myInputStream.readLine();
385 if ( !myInputLine.isEmpty() )
387 if ( !myInputLine.simplified().startsWith(
'#' ) )
389 QStringList myTokens = myInputLine.split( sRxWhitespace, Qt::SkipEmptyParts );
390 if ( myTokens.count() != 4 )
392 myImportError =
true;
393 myBadLines = myBadLines + QString::number( myLineCounter ) +
":\t[" + myInputLine +
"]\n";
397 tableTransparency->insertRow( tableTransparency->rowCount() );
398 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Red ), myTokens[0].toDouble() );
399 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Green ), myTokens[1].toDouble() );
400 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Blue ), myTokens[2].toDouble() );
401 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Tolerance ), 0 );
402 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Opacity ), myTokens[3].toDouble() );
409 case Mode::SingleBand:
411 for (
int myTableRunner = tableTransparency->rowCount() - 1; myTableRunner >= 0; myTableRunner-- )
413 tableTransparency->removeRow( myTableRunner );
416 while ( !myInputStream.atEnd() )
419 myInputLine = myInputStream.readLine();
420 if ( !myInputLine.isEmpty() )
422 if ( !myInputLine.simplified().startsWith(
'#' ) )
424 QStringList myTokens = myInputLine.split( sRxWhitespace, Qt::SkipEmptyParts );
425 if ( myTokens.count() != 3 && myTokens.count() != 2 )
427 myImportError =
true;
428 myBadLines = myBadLines + QString::number( myLineCounter ) +
":\t[" + myInputLine +
"]\n";
432 if ( myTokens.count() == 2 )
434 myTokens.insert( 1, myTokens[0] );
436 tableTransparency->insertRow( tableTransparency->rowCount() );
438 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( SingleBandTableColumns::From ), myTokens[0].toDouble() );
439 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( SingleBandTableColumns::To ), myTokens[1].toDouble() );
440 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( SingleBandTableColumns::Opacity ), myTokens[2].toDouble() );
451 QMessageBox::warning(
this, tr(
"Load Pixel Values from File" ), tr(
"The following lines contained errors\n\n%1" ).arg( myBadLines ) );
454 else if ( !myFileName.isEmpty() )
456 QMessageBox::warning(
this, tr(
"Load Pixel Values from File" ), tr(
"Read access denied. Adjust the file permissions and try again.\n\n" ) );
463void QgsRasterTransparencyWidget::pbnRemoveSelectedRow_clicked()
465 if ( 0 < tableTransparency->rowCount() )
467 tableTransparency->removeRow( tableTransparency->currentRow() );
483 if ( !leNoDataValue->text().isEmpty() )
485 bool myDoubleOk =
false;
489 const QgsRasterRange myNoDataRange( myNoDataValue, myNoDataValue );
490 myNoDataRangeList << myNoDataRange;
495 for (
int bandNo = 1; bandNo <= provider->
bandCount(); bandNo++ )
505 if ( rasterRenderer )
507 rasterRenderer->
setAlphaBand( cboxTransparencyBand->currentBand() );
512 switch ( mCurrentMode )
516 QVector<QgsRasterTransparency::TransparentThreeValuePixel> myTransparentThreeValuePixelList;
517 myTransparentThreeValuePixelList.reserve( tableTransparency->rowCount() );
518 for (
int myListRunner = 0; myListRunner < tableTransparency->rowCount(); myListRunner++ )
520 const double red = transparencyCellValue( myListRunner,
static_cast< int >( RgbBandTableColumns::Red ) );
521 const double green = transparencyCellValue( myListRunner,
static_cast< int >( RgbBandTableColumns::Green ) );
522 const double blue = transparencyCellValue( myListRunner,
static_cast< int >( RgbBandTableColumns::Blue ) );
523 const double opacity = 1.0 - transparencyCellValue( myListRunner,
static_cast< int >( RgbBandTableColumns::Opacity ) ) / 100.0;
524 const double tolerance = transparencyCellValue( myListRunner,
static_cast< int >( RgbBandTableColumns::Tolerance ) );
525 myTransparentThreeValuePixelList.append(
527 !
qgsDoubleNear( tolerance, 0 ) ? tolerance : 4 * std::numeric_limits<double>::epsilon(),
528 !
qgsDoubleNear( tolerance, 0 ) ? tolerance : 4 * std::numeric_limits<double>::epsilon(),
529 !
qgsDoubleNear( tolerance, 0 ) ? tolerance : 4 * std::numeric_limits<double>::epsilon() )
535 case Mode::SingleBand:
537 QVector<QgsRasterTransparency::TransparentSingleValuePixel> myTransparentSingleValuePixelList;
538 myTransparentSingleValuePixelList.reserve( tableTransparency->rowCount() );
539 for (
int myListRunner = 0; myListRunner < tableTransparency->rowCount(); myListRunner++ )
541 const double min = transparencyCellValue( myListRunner,
static_cast< int >( SingleBandTableColumns::From ) );
542 const double max = transparencyCellValue( myListRunner,
static_cast< int >( SingleBandTableColumns::To ) );
543 const double opacity = 1.0 - transparencyCellValue( myListRunner,
static_cast< int >( SingleBandTableColumns::Opacity ) ) / 100.0;
545 myTransparentSingleValuePixelList.append(
557 rasterRenderer->
setOpacity( mOpacityWidget->opacity() );
563 button->blockSignals(
true );
567 button->blockSignals(
false );
572 const auto propertyOverrideButtons { findChildren< QgsPropertyOverrideButton * >() };
591void QgsRasterTransparencyWidget::updateProperty()
599void QgsRasterTransparencyWidget::pixelSelected(
const QgsPointXY &canvasPoint )
608 if ( mMapCanvas && mPixelSelectorTool && mRasterLayer->
dataProvider() )
617 const int myWidth =
static_cast< int >( mMapCanvas->
extent().
width() / mapUnitsPerPixel );
618 const int myHeight =
static_cast< int >( mMapCanvas->
extent().
height() / mapUnitsPerPixel );
622 const QList<int> bands = renderer->
usesBands();
624 QList<double> values;
625 for (
int i = 0; i < bands.size(); ++i )
627 const int bandNo = bands.value( i );
628 if ( myPixelMap.count( bandNo ) == 1 )
634 const double value = myPixelMap.value( bandNo ).toDouble();
635 QgsDebugMsgLevel( QStringLiteral(
"value = %1" ).arg( value, 0,
'g', 17 ), 2 );
636 values.append( value );
640 tableTransparency->insertRow( tableTransparency->rowCount() );
642 switch ( mCurrentMode )
644 case Mode::SingleBand:
645 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( SingleBandTableColumns::From ), values.value( 0 ) );
646 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( SingleBandTableColumns::To ), values.value( 0 ) );
647 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( SingleBandTableColumns::Opacity ), 100 );
650 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Red ), values.value( 0 ) );
651 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Green ), values.value( 1 ) );
652 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Blue ), values.value( 2 ) );
653 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Tolerance ), 0 );
654 setTransparencyCell( tableTransparency->rowCount() - 1,
static_cast< int >( RgbBandTableColumns::Opacity ), 100 );
663void QgsRasterTransparencyWidget::populateTransparencyTable(
QgsRasterRenderer *renderer )
675 const int nBands = renderer->
usesBands().size();
676 setupTransparencyTable( nBands );
679 if ( !rasterTransparency )
684 switch ( mCurrentMode )
686 case Mode::SingleBand:
689 for (
int i = 0; i < pixelList.size(); ++i )
691 tableTransparency->insertRow( i );
692 setTransparencyCell( i,
static_cast< int >( SingleBandTableColumns::From ), pixelList[i].min );
693 setTransparencyCell( i,
static_cast< int >( SingleBandTableColumns::To ), pixelList[i].max );
694 setTransparencyCell( i,
static_cast< int >( SingleBandTableColumns::Opacity ), 100 * ( 1 - pixelList[i].opacity ) );
696 if ( pixelList[i].min != pixelList[i].max )
698 setTransparencyToEdited( i );
706 for (
int i = 0; i < pixelList.size(); ++i )
708 tableTransparency->insertRow( i );
709 setTransparencyCell( i,
static_cast< int >( RgbBandTableColumns::Red ), pixelList[i].red );
710 setTransparencyCell( i,
static_cast< int >( RgbBandTableColumns::Green ), pixelList[i].green );
711 setTransparencyCell( i,
static_cast< int >( RgbBandTableColumns::Blue ), pixelList[i].blue );
712 setTransparencyCell( i,
static_cast< int >( RgbBandTableColumns::Opacity ), 100 * ( 1 - pixelList[i].opacity ) );
715 setTransparencyCell( i,
static_cast< int >( RgbBandTableColumns::Tolerance ), !
qgsDoubleNear( pixelList[i].fuzzyToleranceRed, 0 ) ? pixelList[i].fuzzyToleranceRed : 0 );
721 tableTransparency->resizeColumnsToContents();
722 tableTransparency->resizeRowsToContents();
726void QgsRasterTransparencyWidget::setupTransparencyTable(
int nBands )
728 tableTransparency->clear();
729 tableTransparency->setColumnCount( 0 );
730 tableTransparency->setRowCount( 0 );
731 mTransparencyToEdited.clear();
735 mCurrentMode = Mode::RgbBands;
736 tableTransparency->setColumnCount(
static_cast< int >( RgbBandTableColumns::ColumnCount ) );
737 tableTransparency->setHorizontalHeaderItem(
static_cast< int >( RgbBandTableColumns::Red ),
new QTableWidgetItem( tr(
"Red" ) ) );
738 tableTransparency->setHorizontalHeaderItem(
static_cast< int >( RgbBandTableColumns::Green ),
new QTableWidgetItem( tr(
"Green" ) ) );
739 tableTransparency->setHorizontalHeaderItem(
static_cast< int >( RgbBandTableColumns::Blue ),
new QTableWidgetItem( tr(
"Blue" ) ) );
740 tableTransparency->setHorizontalHeaderItem(
static_cast< int >( RgbBandTableColumns::Tolerance ),
new QTableWidgetItem( tr(
"Tolerance" ) ) );
741 tableTransparency->setHorizontalHeaderItem(
static_cast< int >( RgbBandTableColumns::Opacity ),
new QTableWidgetItem( tr(
"Percent Transparent" ) ) );
745 mCurrentMode = Mode::SingleBand;
746 tableTransparency->setColumnCount(
static_cast< int >( SingleBandTableColumns::ColumnCount ) );
747 tableTransparency->setHorizontalHeaderItem(
static_cast< int >( SingleBandTableColumns::From ),
new QTableWidgetItem( tr(
"From" ) ) );
748 tableTransparency->setHorizontalHeaderItem(
static_cast< int >( SingleBandTableColumns::To ),
new QTableWidgetItem( tr(
"To" ) ) );
749 tableTransparency->setHorizontalHeaderItem(
static_cast< int >( SingleBandTableColumns::Opacity ),
new QTableWidgetItem( tr(
"Percent Transparent" ) ) );
753void QgsRasterTransparencyWidget::setTransparencyCell(
int row,
int column,
double value )
755 QgsDebugMsgLevel( QStringLiteral(
"value = %1" ).arg( value, 0,
'g', 17 ), 2 );
760 QLineEdit *lineEdit =
new QLineEdit();
761 lineEdit->setFrame(
false );
763 lineEdit->setContentsMargins( 1, 1, 1, 1 );
765 if ( column == tableTransparency->columnCount() - 1 )
769 lineEdit->setValidator(
new QIntValidator(
nullptr ) );
770 lineEdit->setText( QString::number(
static_cast<int>( value ) ) );
782 if ( !std::isnan( value ) )
785 valueString = QLocale().toString( v );
789 lineEdit->setValidator(
new QIntValidator(
nullptr ) );
790 if ( !std::isnan( value ) )
792 valueString = QString::number(
static_cast<int>( value ) );
796 lineEdit->setText( valueString );
799 tableTransparency->setCellWidget( row, column, lineEdit );
800 adjustTransparencyCellWidth( row, column );
802 if ( mCurrentMode == Mode::SingleBand && ( column ==
static_cast< int >( SingleBandTableColumns::From ) || column ==
static_cast< int >( SingleBandTableColumns::To ) ) )
804 connect( lineEdit, &QLineEdit::textEdited,
this, &QgsRasterTransparencyWidget::transparencyCellTextEdited );
810void QgsRasterTransparencyWidget::adjustTransparencyCellWidth(
int row,
int column )
812 QLineEdit *lineEdit =
dynamic_cast<QLineEdit *
>( tableTransparency->cellWidget( row, column ) );
816 int width = std::max( lineEdit->fontMetrics().boundingRect( lineEdit->text() ).width() + 10, 100 );
817 width = std::max( width, tableTransparency->columnWidth( column ) );
819 lineEdit->setFixedWidth( width );
822void QgsRasterTransparencyWidget::setTransparencyToEdited(
int row )
824 if ( row >= mTransparencyToEdited.size() )
826 mTransparencyToEdited.resize( row + 1 );
828 mTransparencyToEdited[row] =
true;
831double QgsRasterTransparencyWidget::transparencyCellValue(
int row,
int column )
833 QLineEdit *lineEdit =
dynamic_cast<QLineEdit *
>( tableTransparency->cellWidget( row, column ) );
834 if ( !lineEdit || lineEdit->text().isEmpty() )
836 return std::numeric_limits<double>::quiet_NaN();
843 return mPixelSelectorTool;
@ Float32
Thirty two bit floating point (float)
@ ARGB32_Premultiplied
Color, alpha, red, green, blue, 4 bytes the same as QImage::Format_ARGB32_Premultiplied.
@ ARGB32
Color, alpha, red, green, blue, 4 bytes the same as QImage::Format_ARGB32.
@ Float64
Sixty four bit floating point (double)
@ Value
Numerical pixel value.
QgsDoubleValidator is a QLineEdit Validator that combines QDoubleValidator and QRegularExpressionVali...
static double toDouble(const QString &input, bool *ok)
Converts input string to double value.
Single scope for storing variables and functions for use within a QgsExpressionContext.
static QgsExpressionContextScope * projectScope(const QgsProject *project)
Creates a new scope which contains variables and functions relating to a QGIS project.
static QgsExpressionContextScope * atlasScope(const QgsLayoutAtlas *atlas)
Creates a new scope which contains variables and functions relating to a QgsLayoutAtlas.
static QgsExpressionContextScope * mapSettingsScope(const QgsMapSettings &mapSettings)
Creates a new scope which contains variables and functions relating to a QgsMapSettings object.
static QgsExpressionContextScope * layerScope(const QgsMapLayer *layer)
Creates a new scope which contains variables and functions relating to a QgsMapLayer.
static QgsExpressionContextScope * globalScope()
Creates a new scope which contains variables and functions relating to the global QGIS context.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
void appendScope(QgsExpressionContextScope *scope)
Appends a scope to the end of the context.
Map canvas is a class for displaying all GIS data types on a canvas.
void unsetMapTool(QgsMapTool *mapTool)
Unset the current map tool or last non zoom tool.
void setMapTool(QgsMapTool *mapTool, bool clean=false)
Sets the map tool currently being used on the canvas.
double mapUnitsPerPixel() const
Returns the mapUnitsPerPixel (map units per pixel) for the canvas.
const QgsMapSettings & mapSettings() const
Gets access to properties used for map rendering.
QgsRectangle extent() const
Returns the current zoom extent of the map canvas.
The QgsMapSettings class contains configuration for rendering of the map.
QgsPointXY mapToLayerCoordinates(const QgsMapLayer *layer, QgsPointXY point) const
transform point coordinates from output CRS to layer's CRS
A class to represent a 2D point.
static QgsProject * instance()
Returns the QgsProject singleton instance.
void setProperty(int key, const QgsProperty &property)
Adds a property to the collection and takes ownership of it.
QgsProperty property(int key) const final
Returns a matching property from the collection, if one exists.
void bandChanged(int band)
Emitted when the currently selected band changes.
static QString printValue(double value, bool localized=false)
Print double value with all necessary significant digits.
Base class for raster data providers.
virtual bool sourceHasNoDataValue(int bandNo) const
Returns true if source band has no data value.
virtual bool useSourceNoDataValue(int bandNo) const
Returns the source nodata value usage.
Qgis::DataType sourceDataType(int bandNo) const override=0
Returns source data type for the band specified by number, source data type may be shorter than dataT...
virtual void setUseSourceNoDataValue(int bandNo, bool use)
Sets the source nodata value usage.
virtual double sourceNoDataValue(int bandNo) const
Value representing no data value.
Qgis::DataType dataType(int bandNo) const override=0
Returns data type for the band specified by number.
virtual QgsRasterIdentifyResult identify(const QgsPointXY &point, Qgis::RasterIdentifyFormat format, const QgsRectangle &boundingBox=QgsRectangle(), int width=0, int height=0, int dpi=96)
Identify raster value(s) found on the point position.
virtual QgsRasterRangeList userNoDataValues(int bandNo) const
Returns a list of user no data value ranges.
virtual void setUserNoDataValue(int bandNo, const QgsRasterRangeList &noData)
QMap< int, QVariant > results() const
Returns the identify results.
virtual int bandCount() const =0
Gets number of bands.
Represents a raster layer.
QgsRasterPipe * pipe()
Returns the raster pipe.
QgsRasterRenderer * renderer() const
Returns the raster's renderer.
QgsRasterDataProvider * dataProvider() override
Returns the source data provider.
QgsPropertyCollection & dataDefinedProperties()
Returns a reference to the pipe's property collection, used for data defined overrides.
Property
Data definable properties.
@ RendererOpacity
Raster renderer global opacity.
static QgsPropertiesDefinition propertyDefinitions()
Returns the definitions for data defined properties available for use in raster pipes.
void setDataDefinedProperties(const QgsPropertyCollection &collection)
Sets the pipe's property collection, used for data defined overrides.
Raster values range container.
Raster renderer pipe that applies colors to a raster.
QColor nodataColor() const
Returns the color to use for shading nodata pixels.
const QgsRasterTransparency * rasterTransparency() const
double opacity() const
Returns the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1....
virtual QList< int > usesBands() const
Returns a list of band numbers used by the renderer.
void setAlphaBand(int band)
void setOpacity(double opacity)
Sets the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1....
void setRasterTransparency(QgsRasterTransparency *t)
void setNodataColor(const QColor &color)
Sets the color to use for shading nodata pixels.
Defines the list of pixel values to be considered as transparent or semi transparent when rendering r...
void setTransparentSingleValuePixelList(const QVector< QgsRasterTransparency::TransparentSingleValuePixel > &newList)
Sets the transparent single value pixel list, replacing the whole existing list.
QVector< QgsRasterTransparency::TransparentSingleValuePixel > transparentSingleValuePixelList() const
Returns the transparent single value pixel list.
void setTransparentThreeValuePixelList(const QVector< QgsRasterTransparency::TransparentThreeValuePixel > &newList)
Sets the transparent three value pixel list, replacing the whole existing list.
QVector< QgsRasterTransparency::TransparentThreeValuePixel > transparentThreeValuePixelList() const
Returns the transparent three value pixel list.
A rectangle specified with double values.
double width() const
Returns the width of the rectangle.
double height() const
Returns the height of the rectangle.
This class is a composition of two QSettings instances:
QVariant value(const QString &key, const QVariant &defaultValue=QVariant(), Section section=NoSection) const
Returns the value for setting key.
Contains settings which reflect the context in which a symbol (or renderer) widget is shown,...
QList< QgsExpressionContextScope > additionalExpressionContextScopes() const
Returns the list of additional expression context scopes to show as available within the layer.
QgsMapCanvas * mapCanvas() const
Returns the map canvas associated with the widget.
static bool isNull(const QVariant &variant, bool silenceNullWarnings=false)
Returns true if the specified variant should be considered a NULL value.
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
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)
QgsSignalBlocker< Object > whileBlocking(Object *object)
Temporarily blocks signals from a QObject while calling a single method from the object.
#define QgsDebugMsgLevel(str, level)
QList< QgsRasterRange > QgsRasterRangeList
Defines the transparency for a range of single-band pixel values.
Defines the transparency for a RGB pixel value.