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qgscolorrampshaderwidget.cpp
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qgscolorrampshaderwidget.cpp
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/***************************************************************************
qgscolorrampshaderwidget.cpp
----------------------------
begin : Jun 2018
copyright : (C) 2018 by Peter Petrik
email : zilolv 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 "qgsrasterdataprovider.h"
#include "qgscolorrampshaderwidget.h"
#include "qgssinglebandpseudocolorrenderer.h"
#include "qgsrasterlayer.h"
#include "qgsrasterdataprovider.h"
#include "qgsrastershader.h"
#include "qgsrasterminmaxwidget.h"
#include "qgstreewidgetitem.h"
#include "qgssettings.h"
#include "qgsstyle.h"
#include "qgscolorramp.h"
#include "qgscolorrampbutton.h"
#include "qgscolordialog.h"
#include <QCursor>
#include <QPushButton>
#include <QInputDialog>
#include <QFileDialog>
#include <QMenu>
#include <QMessageBox>
#include <QTextStream>
#include <QTreeView>
QgsColorRampShaderWidget::QgsColorRampShaderWidget( QWidget *parent )
: QWidget( parent )
{
QgsSettings settings;
setupUi( this );
mLoadFromBandButton->setVisible( false ); // only for raster version
connect( mAddEntryButton, &QPushButton::clicked, this, &QgsColorRampShaderWidget::mAddEntryButton_clicked );
connect( mDeleteEntryButton, &QPushButton::clicked, this, &QgsColorRampShaderWidget::mDeleteEntryButton_clicked );
connect( mLoadFromBandButton, &QPushButton::clicked, this, &QgsColorRampShaderWidget::mLoadFromBandButton_clicked );
connect( mLoadFromFileButton, &QPushButton::clicked, this, &QgsColorRampShaderWidget::mLoadFromFileButton_clicked );
connect( mExportToFileButton, &QPushButton::clicked, this, &QgsColorRampShaderWidget::mExportToFileButton_clicked );
connect( mUnitLineEdit, &QLineEdit::textEdited, this, &QgsColorRampShaderWidget::mUnitLineEdit_textEdited );
connect( mColormapTreeWidget, &QTreeWidget::itemDoubleClicked, this, &QgsColorRampShaderWidget::mColormapTreeWidget_itemDoubleClicked );
connect( mColorInterpolationComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsColorRampShaderWidget::mColorInterpolationComboBox_currentIndexChanged );
connect( mClassificationModeComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsColorRampShaderWidget::mClassificationModeComboBox_currentIndexChanged );
contextMenu = new QMenu( tr( "Options" ), this );
contextMenu->addAction( tr( "Change Color…" ), this, SLOT( changeColor() ) );
contextMenu->addAction( tr( "Change Opacity…" ), this, SLOT( changeOpacity() ) );
mColormapTreeWidget->setColumnWidth( ColorColumn, 50 );
mColormapTreeWidget->setContextMenuPolicy( Qt::CustomContextMenu );
mColormapTreeWidget->setSelectionMode( QAbstractItemView::ExtendedSelection );
connect( mColormapTreeWidget, &QTreeView::customContextMenuRequested, this, [ = ]( QPoint ) { contextMenu->exec( QCursor::pos() ); }
);
QString defaultPalette = settings.value( QStringLiteral( "Raster/defaultPalette" ), "" ).toString();
btnColorRamp->setColorRampFromName( defaultPalette );
mColorInterpolationComboBox->addItem( tr( "Discrete" ), QgsColorRampShader::Discrete );
mColorInterpolationComboBox->addItem( tr( "Linear" ), QgsColorRampShader::Interpolated );
mColorInterpolationComboBox->addItem( tr( "Exact" ), QgsColorRampShader::Exact );
mColorInterpolationComboBox->setCurrentIndex( mColorInterpolationComboBox->findData( QgsColorRampShader::Interpolated ) );
mClassificationModeComboBox->addItem( tr( "Continuous" ), QgsColorRampShader::Continuous );
mClassificationModeComboBox->addItem( tr( "Equal Interval" ), QgsColorRampShader::EqualInterval );
// Quantile added only on demand
mClassificationModeComboBox->setCurrentIndex( mClassificationModeComboBox->findData( QgsColorRampShader::Continuous ) );
mNumberOfEntriesSpinBox->setValue( 5 ); // some default
mClassificationModeComboBox_currentIndexChanged( 0 );
resetClassifyButton();
connect( mClassificationModeComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsColorRampShaderWidget::classify );
connect( mClassifyButton, &QPushButton::clicked, this, &QgsColorRampShaderWidget::applyColorRamp );
connect( btnColorRamp, &QgsColorRampButton::colorRampChanged, this, &QgsColorRampShaderWidget::applyColorRamp );
connect( mNumberOfEntriesSpinBox, static_cast < void ( QSpinBox::* )( int ) > ( &QSpinBox::valueChanged ), this, &QgsColorRampShaderWidget::classify );
connect( mClipCheckBox, &QAbstractButton::toggled, this, &QgsColorRampShaderWidget::widgetChanged );
}
void QgsColorRampShaderWidget::initializeForUseWithRasterLayer()
{
Q_ASSERT( mClassificationModeComboBox->findData( QgsColorRampShader::Quantile < 0 ) );
mClassificationModeComboBox->addItem( tr( "Quantile" ), QgsColorRampShader::Quantile );
}
void QgsColorRampShaderWidget::setRasterDataProvider( QgsRasterDataProvider *dp )
{
mRasterDataProvider = dp;
mLoadFromBandButton->setVisible( bool( mRasterDataProvider ) ); // only for raster version
}
void QgsColorRampShaderWidget::setRasterBand( int band )
{
mBand = band;
}
void QgsColorRampShaderWidget::setExtent( const QgsRectangle &extent )
{
mExtent = extent;
}
QgsColorRampShader QgsColorRampShaderWidget::shader() const
{
QgsColorRampShader colorRampShader( mMin, mMax );
colorRampShader.setColorRampType( static_cast< QgsColorRampShader::Type >( mColorInterpolationComboBox->currentData().toInt() ) );
colorRampShader.setClassificationMode( static_cast< QgsColorRampShader::ClassificationMode >( mClassificationModeComboBox->currentData().toInt() ) );
colorRampShader.setClip( mClipCheckBox->isChecked() );
//iterate through mColormapTreeWidget and set colormap info of layer
QList<QgsColorRampShader::ColorRampItem> colorRampItems;
int topLevelItemCount = mColormapTreeWidget->topLevelItemCount();
QTreeWidgetItem *currentItem = nullptr;
for ( int i = 0; i < topLevelItemCount; ++i )
{
currentItem = mColormapTreeWidget->topLevelItem( i );
if ( !currentItem )
{
continue;
}
QgsColorRampShader::ColorRampItem newColorRampItem;
newColorRampItem.value = currentItem->text( ValueColumn ).toDouble();
newColorRampItem.color = currentItem->background( ColorColumn ).color();
newColorRampItem.label = currentItem->text( LabelColumn );
colorRampItems.append( newColorRampItem );
}
// sort the shader items
std::sort( colorRampItems.begin(), colorRampItems.end() );
colorRampShader.setColorRampItemList( colorRampItems );
if ( !btnColorRamp->isNull() )
{
colorRampShader.setSourceColorRamp( btnColorRamp->colorRamp() );
}
return colorRampShader;
}
void QgsColorRampShaderWidget::autoLabel()
{
QgsColorRampShader::Type interpolation = static_cast< QgsColorRampShader::Type >( mColorInterpolationComboBox->currentData().toInt() );
bool discrete = interpolation == QgsColorRampShader::Discrete;
QString unit = mUnitLineEdit->text();
QString label;
int topLevelItemCount = mColormapTreeWidget->topLevelItemCount();
QTreeWidgetItem *currentItem = nullptr;
for ( int i = 0; i < topLevelItemCount; ++i )
{
currentItem = mColormapTreeWidget->topLevelItem( i );
//If the item is null or does not have a pixel values set, skip
if ( !currentItem || currentItem->text( ValueColumn ).isEmpty() )
{
continue;
}
if ( discrete )
{
if ( i == 0 )
{
label = "<= " + currentItem->text( ValueColumn ) + unit;
}
else if ( currentItem->text( ValueColumn ).toDouble() == std::numeric_limits<double>::infinity() )
{
label = "> " + mColormapTreeWidget->topLevelItem( i - 1 )->text( ValueColumn ) + unit;
}
else
{
label = mColormapTreeWidget->topLevelItem( i - 1 )->text( ValueColumn ) + " - " + currentItem->text( ValueColumn ) + unit;
}
}
else
{
label = currentItem->text( ValueColumn ) + unit;
}
if ( currentItem->text( LabelColumn ).isEmpty() || currentItem->text( LabelColumn ) == label || currentItem->foreground( LabelColumn ).color() == QColor( Qt::gray ) )
{
currentItem->setText( LabelColumn, label );
currentItem->setForeground( LabelColumn, QBrush( QColor( Qt::gray ) ) );
}
}
}
void QgsColorRampShaderWidget::setUnitFromLabels()
{
QgsColorRampShader::Type interpolation = static_cast< QgsColorRampShader::Type >( mColorInterpolationComboBox->currentData().toInt() );
bool discrete = interpolation == QgsColorRampShader::Discrete;
QStringList allSuffixes;
QString label;
int topLevelItemCount = mColormapTreeWidget->topLevelItemCount();
QTreeWidgetItem *currentItem = nullptr;
for ( int i = 0; i < topLevelItemCount; ++i )
{
currentItem = mColormapTreeWidget->topLevelItem( i );
//If the item is null or does not have a pixel values set, skip
if ( !currentItem || currentItem->text( ValueColumn ).isEmpty() )
{
continue;
}
if ( discrete )
{
if ( i == 0 )
{
label = "<= " + currentItem->text( ValueColumn );
}
else if ( currentItem->text( ValueColumn ).toDouble() == std::numeric_limits<double>::infinity() )
{
label = "> " + mColormapTreeWidget->topLevelItem( i - 1 )->text( ValueColumn );
}
else
{
label = mColormapTreeWidget->topLevelItem( i - 1 )->text( ValueColumn ) + " - " + currentItem->text( ValueColumn );
}
}
else
{
label = currentItem->text( ValueColumn );
}
if ( currentItem->text( LabelColumn ).startsWith( label ) )
{
allSuffixes.append( currentItem->text( LabelColumn ).mid( label.length() ) );
}
}
// find most common suffix
QStringList suffixes = QStringList( allSuffixes );
suffixes.removeDuplicates();
int max = 0;
QString unit;
for ( int i = 0; i < suffixes.count(); ++i )
{
int n = allSuffixes.count( suffixes[i] );
if ( n > max )
{
max = n;
unit = suffixes[i];
}
}
// Set this suffix as unit if at least used twice
if ( max >= 2 )
{
mUnitLineEdit->setText( unit );
}
autoLabel();
}
void QgsColorRampShaderWidget::mAddEntryButton_clicked()
{
QgsTreeWidgetItemObject *newItem = new QgsTreeWidgetItemObject( mColormapTreeWidget );
newItem->setText( ValueColumn, QStringLiteral( "0" ) );
newItem->setBackground( ColorColumn, QBrush( QColor( Qt::magenta ) ) );
newItem->setText( LabelColumn, QString() );
newItem->setFlags( Qt::ItemIsEnabled | Qt::ItemIsEditable | Qt::ItemIsSelectable );
connect( newItem, &QgsTreeWidgetItemObject::itemEdited,
this, &QgsColorRampShaderWidget::mColormapTreeWidget_itemEdited );
mColormapTreeWidget->sortItems( ValueColumn, Qt::AscendingOrder );
autoLabel();
loadMinimumMaximumFromTree();
emit widgetChanged();
}
void QgsColorRampShaderWidget::mDeleteEntryButton_clicked()
{
QList<QTreeWidgetItem *> itemList;
itemList = mColormapTreeWidget->selectedItems();
if ( itemList.isEmpty() )
{
return;
}
Q_FOREACH ( QTreeWidgetItem *item, itemList )
{
delete item;
}
loadMinimumMaximumFromTree();
emit widgetChanged();
}
void QgsColorRampShaderWidget::classify()
{
std::unique_ptr< QgsColorRamp > ramp( btnColorRamp->colorRamp() );
if ( !ramp || std::isnan( mMin ) || std::isnan( mMax ) )
{
return;
}
std::unique_ptr< QgsColorRampShader > colorRampShader( new QgsColorRampShader(
mMin, mMax,
ramp.release(),
static_cast< QgsColorRampShader::Type >( mColorInterpolationComboBox->currentData().toInt() ),
static_cast< QgsColorRampShader::ClassificationMode >( mClassificationModeComboBox->currentData().toInt() ) )
);
// only for Quantile we need band and provider and extent
colorRampShader->classifyColorRamp( mNumberOfEntriesSpinBox->value(),
mBand,
mExtent,
mRasterDataProvider );
colorRampShader->setClip( mClipCheckBox->isChecked() );
mColormapTreeWidget->clear();
const QList<QgsColorRampShader::ColorRampItem> colorRampItemList = colorRampShader->colorRampItemList();
QList<QgsColorRampShader::ColorRampItem>::const_iterator it = colorRampItemList.constBegin();
for ( ; it != colorRampItemList.end(); ++it )
{
QgsTreeWidgetItemObject *newItem = new QgsTreeWidgetItemObject( mColormapTreeWidget );
newItem->setText( ValueColumn, QString::number( it->value, 'g', 15 ) );
newItem->setBackground( ColorColumn, QBrush( it->color ) );
newItem->setText( LabelColumn, it->label );
newItem->setFlags( Qt::ItemIsEnabled | Qt::ItemIsEditable | Qt::ItemIsSelectable );
connect( newItem, &QgsTreeWidgetItemObject::itemEdited,
this, &QgsColorRampShaderWidget::mColormapTreeWidget_itemEdited );
}
mClipCheckBox->setChecked( colorRampShader->clip() );
autoLabel();
emit widgetChanged();
}
void QgsColorRampShaderWidget::mClassificationModeComboBox_currentIndexChanged( int index )
{
QgsColorRampShader::ClassificationMode mode = static_cast< QgsColorRampShader::ClassificationMode >( mClassificationModeComboBox->itemData( index ).toInt() );
mNumberOfEntriesSpinBox->setEnabled( mode != QgsColorRampShader::Continuous );
emit classificationModeChanged( mode );
}
void QgsColorRampShaderWidget::applyColorRamp()
{
std::unique_ptr< QgsColorRamp > ramp( btnColorRamp->colorRamp() );
if ( !ramp )
{
return;
}
if ( !btnColorRamp->colorRampName().isEmpty() )
{
// Remember last used color ramp
QgsSettings settings;
settings.setValue( QStringLiteral( "Raster/defaultPalette" ), btnColorRamp->colorRampName() );
}
bool enableContinuous = ( ramp->count() > 0 );
mClassificationModeComboBox->setEnabled( enableContinuous );
if ( !enableContinuous )
{
mClassificationModeComboBox->setCurrentIndex( mClassificationModeComboBox->findData( QgsColorRampShader::EqualInterval ) );
}
classify();
}
void QgsColorRampShaderWidget::populateColormapTreeWidget( const QList<QgsColorRampShader::ColorRampItem> &colorRampItems )
{
mColormapTreeWidget->clear();
QList<QgsColorRampShader::ColorRampItem>::const_iterator it = colorRampItems.constBegin();
for ( ; it != colorRampItems.constEnd(); ++it )
{
QgsTreeWidgetItemObject *newItem = new QgsTreeWidgetItemObject( mColormapTreeWidget );
newItem->setText( ValueColumn, QString::number( it->value, 'g', 15 ) );
newItem->setBackground( ColorColumn, QBrush( it->color ) );
newItem->setText( LabelColumn, it->label );
newItem->setFlags( Qt::ItemIsEnabled | Qt::ItemIsEditable | Qt::ItemIsSelectable );
connect( newItem, &QgsTreeWidgetItemObject::itemEdited,
this, &QgsColorRampShaderWidget::mColormapTreeWidget_itemEdited );
}
setUnitFromLabels();
autoLabel();
emit widgetChanged();
}
void QgsColorRampShaderWidget::mLoadFromBandButton_clicked()
{
if ( !mRasterDataProvider )
return;
QList<QgsColorRampShader::ColorRampItem> colorRampList = mRasterDataProvider->colorTable( mBand );
if ( !colorRampList.isEmpty() )
{
populateColormapTreeWidget( colorRampList );
mColorInterpolationComboBox->setCurrentIndex( mColorInterpolationComboBox->findData( QgsColorRampShader::Interpolated ) );
}
else
{
QMessageBox::warning( this, tr( "Load Color Map" ), tr( "The color map for band %1 has no entries." ).arg( mBand ) );
}
loadMinimumMaximumFromTree();
emit widgetChanged();
}
void QgsColorRampShaderWidget::mLoadFromFileButton_clicked()
{
int lineCounter = 0;
bool importError = false;
QString badLines;
QgsSettings settings;
QString lastDir = settings.value( QStringLiteral( "lastColorMapDir" ), QDir::homePath() ).toString();
QString fileName = QFileDialog::getOpenFileName( this, tr( "Load Color Map from File" ), lastDir, tr( "Textfile (*.txt)" ) );
QFile inputFile( fileName );
if ( inputFile.open( QFile::ReadOnly ) )
{
//clear the current tree
mColormapTreeWidget->clear();
QTextStream inputStream( &inputFile );
QString inputLine;
QStringList inputStringComponents;
QList<QgsColorRampShader::ColorRampItem> colorRampItems;
//read through the input looking for valid data
while ( !inputStream.atEnd() )
{
lineCounter++;
inputLine = inputStream.readLine();
if ( !inputLine.isEmpty() )
{
if ( !inputLine.simplified().startsWith( '#' ) )
{
if ( inputLine.contains( QLatin1String( "INTERPOLATION" ), Qt::CaseInsensitive ) )
{
inputStringComponents = inputLine.split( ':' );
if ( inputStringComponents.size() == 2 )
{
if ( inputStringComponents[1].trimmed().toUpper().compare( QLatin1String( "INTERPOLATED" ), Qt::CaseInsensitive ) == 0 )
{
mColorInterpolationComboBox->setCurrentIndex( mColorInterpolationComboBox->findData( QgsColorRampShader::Interpolated ) );
}
else if ( inputStringComponents[1].trimmed().toUpper().compare( QLatin1String( "DISCRETE" ), Qt::CaseInsensitive ) == 0 )
{
mColorInterpolationComboBox->setCurrentIndex( mColorInterpolationComboBox->findData( QgsColorRampShader::Discrete ) );
}
else
{
mColorInterpolationComboBox->setCurrentIndex( mColorInterpolationComboBox->findData( QgsColorRampShader::Exact ) );
}
}
else
{
importError = true;
badLines = badLines + QString::number( lineCounter ) + ":\t[" + inputLine + "]\n";
}
}
else
{
inputStringComponents = inputLine.split( ',' );
if ( inputStringComponents.size() == 6 )
{
QgsColorRampShader::ColorRampItem currentItem( inputStringComponents[0].toDouble(),
QColor::fromRgb( inputStringComponents[1].toInt(), inputStringComponents[2].toInt(),
inputStringComponents[3].toInt(), inputStringComponents[4].toInt() ),
inputStringComponents[5] );
colorRampItems.push_back( currentItem );
}
else
{
importError = true;
badLines = badLines + QString::number( lineCounter ) + ":\t[" + inputLine + "]\n";
}
}
}
}
lineCounter++;
}
populateColormapTreeWidget( colorRampItems );
QFileInfo fileInfo( fileName );
settings.setValue( QStringLiteral( "lastColorMapDir" ), fileInfo.absoluteDir().absolutePath() );
if ( importError )
{
QMessageBox::warning( this, tr( "Load Color Map from File" ), tr( "The following lines contained errors\n\n" ) + badLines );
}
}
else if ( !fileName.isEmpty() )
{
QMessageBox::warning( this, tr( "Load Color Map from File" ), tr( "Read access denied. Adjust the file permissions and try again.\n\n" ) );
}
loadMinimumMaximumFromTree();
emit widgetChanged();
}
void QgsColorRampShaderWidget::mExportToFileButton_clicked()
{
QgsSettings settings;
QString lastDir = settings.value( QStringLiteral( "lastColorMapDir" ), QDir::homePath() ).toString();
QString fileName = QFileDialog::getSaveFileName( this, tr( "Save Color Map as File" ), lastDir, tr( "Textfile (*.txt)" ) );
if ( !fileName.isEmpty() )
{
if ( !fileName.endsWith( QLatin1String( ".txt" ), Qt::CaseInsensitive ) )
{
fileName = fileName + ".txt";
}
QFile outputFile( fileName );
if ( outputFile.open( QFile::WriteOnly | QIODevice::Truncate ) )
{
QTextStream outputStream( &outputFile );
outputStream << "# " << tr( "QGIS Generated Color Map Export File" ) << '\n';
outputStream << "INTERPOLATION:";
QgsColorRampShader::Type interpolation = static_cast< QgsColorRampShader::Type >( mColorInterpolationComboBox->currentData().toInt() );
switch ( interpolation )
{
case QgsColorRampShader::Interpolated:
outputStream << "INTERPOLATED\n";
break;
case QgsColorRampShader::Discrete:
outputStream << "DISCRETE\n";
break;
case QgsColorRampShader::Exact:
outputStream << "EXACT\n";
break;
}
int topLevelItemCount = mColormapTreeWidget->topLevelItemCount();
QTreeWidgetItem *currentItem = nullptr;
QColor color;
for ( int i = 0; i < topLevelItemCount; ++i )
{
currentItem = mColormapTreeWidget->topLevelItem( i );
if ( !currentItem )
{
continue;
}
color = currentItem->background( ColorColumn ).color();
outputStream << currentItem->text( ValueColumn ).toDouble() << ',';
outputStream << color.red() << ',' << color.green() << ',' << color.blue() << ',' << color.alpha() << ',';
if ( currentItem->text( LabelColumn ).isEmpty() )
{
outputStream << "Color entry " << i + 1 << '\n';
}
else
{
outputStream << currentItem->text( LabelColumn ) << '\n';
}
}
outputStream.flush();
outputFile.close();
QFileInfo fileInfo( fileName );
settings.setValue( QStringLiteral( "lastColorMapDir" ), fileInfo.absoluteDir().absolutePath() );
}
else
{
QMessageBox::warning( this, tr( "Save Color Map as File" ), tr( "Write access denied. Adjust the file permissions and try again.\n\n" ) );
}
}
}
void QgsColorRampShaderWidget::mColormapTreeWidget_itemDoubleClicked( QTreeWidgetItem *item, int column )
{
if ( !item )
{
return;
}
if ( column == ColorColumn )
{
item->setFlags( Qt::ItemIsEnabled | Qt::ItemIsSelectable );
QColor newColor = QgsColorDialog::getColor( item->background( column ).color(), this, QStringLiteral( "Change Color" ), true );
if ( newColor.isValid() )
{
item->setBackground( ColorColumn, QBrush( newColor ) );
loadMinimumMaximumFromTree();
emit widgetChanged();
}
}
else
{
if ( column == LabelColumn )
{
// Set text color to default black, which signifies a manually edited label
item->setForeground( LabelColumn, QBrush() );
}
item->setFlags( Qt::ItemIsEnabled | Qt::ItemIsEditable | Qt::ItemIsSelectable );
}
}
void QgsColorRampShaderWidget::mColormapTreeWidget_itemEdited( QTreeWidgetItem *item, int column )
{
Q_UNUSED( item );
if ( column == ValueColumn )
{
mColormapTreeWidget->sortItems( ValueColumn, Qt::AscendingOrder );
autoLabel();
loadMinimumMaximumFromTree();
emit widgetChanged();
}
else if ( column == LabelColumn )
{
// call autoLabel to fill when empty or gray out when same as autoLabel
autoLabel();
emit widgetChanged();
}
}
void QgsColorRampShaderWidget::setFromShader( const QgsColorRampShader &colorRampShader )
{
if ( colorRampShader.sourceColorRamp() )
{
btnColorRamp->setColorRamp( colorRampShader.sourceColorRamp() );
}
else
{
QgsSettings settings;
QString defaultPalette = settings.value( QStringLiteral( "/Raster/defaultPalette" ), "Spectral" ).toString();
btnColorRamp->setColorRampFromName( defaultPalette );
}
mColorInterpolationComboBox->setCurrentIndex( mColorInterpolationComboBox->findData( colorRampShader.colorRampType() ) );
mColormapTreeWidget->clear();
const QList<QgsColorRampShader::ColorRampItem> colorRampItemList = colorRampShader.colorRampItemList();
QList<QgsColorRampShader::ColorRampItem>::const_iterator it = colorRampItemList.constBegin();
for ( ; it != colorRampItemList.end(); ++it )
{
QgsTreeWidgetItemObject *newItem = new QgsTreeWidgetItemObject( mColormapTreeWidget );
newItem->setText( ValueColumn, QString::number( it->value, 'g', 15 ) );
newItem->setBackground( ColorColumn, QBrush( it->color ) );
newItem->setText( LabelColumn, it->label );
newItem->setFlags( Qt::ItemIsEnabled | Qt::ItemIsEditable | Qt::ItemIsSelectable );
connect( newItem, &QgsTreeWidgetItemObject::itemEdited,
this, &QgsColorRampShaderWidget::mColormapTreeWidget_itemEdited );
}
setUnitFromLabels();
mClipCheckBox->setChecked( colorRampShader.clip() );
mClassificationModeComboBox->setCurrentIndex( mClassificationModeComboBox->findData( colorRampShader.classificationMode() ) );
mNumberOfEntriesSpinBox->setValue( colorRampShader.colorRampItemList().count() ); // some default
}
void QgsColorRampShaderWidget::mColorInterpolationComboBox_currentIndexChanged( int index )
{
QgsColorRampShader::Type interpolation = static_cast< QgsColorRampShader::Type >( mColorInterpolationComboBox->itemData( index ).toInt() );
mClipCheckBox->setEnabled( interpolation == QgsColorRampShader::Interpolated );
QString valueLabel;
QString valueToolTip;
switch ( interpolation )
{
case QgsColorRampShader::Interpolated:
valueLabel = tr( "Value" );
valueToolTip = tr( "Value for color stop" );
break;
case QgsColorRampShader::Discrete:
valueLabel = tr( "Value <=" );
valueToolTip = tr( "Maximum value for class" );
break;
case QgsColorRampShader::Exact:
valueLabel = tr( "Value =" );
valueToolTip = tr( "Value for color" );
break;
}
QTreeWidgetItem *header = mColormapTreeWidget->headerItem();
header->setText( ValueColumn, valueLabel );
header->setToolTip( ValueColumn, valueToolTip );
autoLabel();
emit widgetChanged();
}
void QgsColorRampShaderWidget::setMinimumMaximumAndClassify( double min, double max )
{
if ( !qgsDoubleNear( mMin, min ) || !qgsDoubleNear( mMax, max ) )
{
setMinimumMaximum( min, max );
classify();
}
}
void QgsColorRampShaderWidget::setMinimumMaximum( double min, double max )
{
mMin = min;
mMax = max;
resetClassifyButton();
}
double QgsColorRampShaderWidget::minimum() const
{
return mMin;
}
double QgsColorRampShaderWidget::maximum() const
{
return mMax;
}
void QgsColorRampShaderWidget::loadMinimumMaximumFromTree()
{
QTreeWidgetItem *item = mColormapTreeWidget->topLevelItem( 0 );
if ( !item )
{
return;
}
double min = item->text( ValueColumn ).toDouble();
item = mColormapTreeWidget->topLevelItem( mColormapTreeWidget->topLevelItemCount() - 1 );
double max = item->text( ValueColumn ).toDouble();
if ( !qgsDoubleNear( mMin, min ) || !qgsDoubleNear( mMax, max ) )
{
mMin = min;
mMax = max;
emit minimumMaximumChangedFromTree( min, max );
}
}
void QgsColorRampShaderWidget::resetClassifyButton()
{
mClassifyButton->setEnabled( true );
if ( std::isnan( mMin ) || std::isnan( mMax ) || mMin >= mMax )
{
mClassifyButton->setEnabled( false );
}
}
void QgsColorRampShaderWidget::changeColor()
{
QList<QTreeWidgetItem *> itemList;
itemList = mColormapTreeWidget->selectedItems();
if ( itemList.isEmpty() )
{
return;
}
QTreeWidgetItem *firstItem = itemList.first();
QColor newColor = QgsColorDialog::getColor( firstItem->background( ColorColumn ).color(), this, QStringLiteral( "Change Color" ), true );
if ( newColor.isValid() )
{
Q_FOREACH ( QTreeWidgetItem *item, itemList )
{
item->setFlags( Qt::ItemIsEnabled | Qt::ItemIsSelectable );
item->setBackground( ColorColumn, QBrush( newColor ) );
}
loadMinimumMaximumFromTree();
emit widgetChanged();
}
}
void QgsColorRampShaderWidget::changeOpacity()
{
QList<QTreeWidgetItem *> itemList;
itemList = mColormapTreeWidget->selectedItems();
if ( itemList.isEmpty() )
{
return;
}
QTreeWidgetItem *firstItem = itemList.first();
bool ok;
double oldOpacity = firstItem->background( ColorColumn ).color().alpha() / 255 * 100;
double opacity = QInputDialog::getDouble( this, tr( "Opacity" ), tr( "Change color opacity [%]" ), oldOpacity, 0.0, 100.0, 0, &ok );
if ( ok )
{
int newOpacity = static_cast<int>( opacity / 100 * 255 );
Q_FOREACH ( QTreeWidgetItem *item, itemList )
{
QColor newColor = item->background( ColorColumn ).color();
newColor.setAlpha( newOpacity );
item->setBackground( ColorColumn, QBrush( newColor ) );
}
loadMinimumMaximumFromTree();
emit widgetChanged();
}
}