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qgsmultibandcolorrendererwidget.cpp
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qgsmultibandcolorrendererwidget.cpp
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/***************************************************************************
qgsmultibandcolorrendererwidget.cpp
-----------------------------------
begin : February 2012
copyright : (C) 2012 by Marco Hugentobler
email : marco at sourcepole dot ch
***************************************************************************/
/***************************************************************************
* *
* 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 "qgsmultibandcolorrendererwidget.h"
#include "qgsmultibandcolorrenderer.h"
#include "qgsrasterlayer.h"
QgsMultiBandColorRendererWidget::QgsMultiBandColorRendererWidget( QgsRasterLayer* layer, const QgsRectangle &extent )
: QgsRasterRendererWidget( layer, extent )
, mMinMaxWidget( nullptr )
{
setupUi( this );
createValidators();
if ( mRasterLayer )
{
QgsRasterDataProvider* provider = mRasterLayer->dataProvider();
if ( !provider )
{
return;
}
mMinMaxWidget = new QgsRasterMinMaxWidget( layer, this );
mMinMaxWidget->setExtent( extent );
mMinMaxWidget->setMapCanvas( mCanvas );
layout()->addWidget( mMinMaxWidget );
connect( mMinMaxWidget, SIGNAL( load( int, double, double, int ) ),
this, SLOT( loadMinMax( int, double, double, int ) ) );
connect( mRedBandComboBox, SIGNAL( currentIndexChanged( int ) ),
this, SLOT( onBandChanged( int ) ) );
connect( mGreenBandComboBox, SIGNAL( currentIndexChanged( int ) ),
this, SLOT( onBandChanged( int ) ) );
connect( mBlueBandComboBox, SIGNAL( currentIndexChanged( int ) ),
this, SLOT( onBandChanged( int ) ) );
//fill available bands into combo boxes
mRedBandComboBox->addItem( tr( "Not set" ), -1 );
mGreenBandComboBox->addItem( tr( "Not set" ), -1 );
mBlueBandComboBox->addItem( tr( "Not set" ), -1 );
//contrast enhancement algorithms
mContrastEnhancementAlgorithmComboBox->addItem( tr( "No enhancement" ), 0 );
mContrastEnhancementAlgorithmComboBox->addItem( tr( "Stretch to MinMax" ), 1 );
mContrastEnhancementAlgorithmComboBox->addItem( tr( "Stretch and clip to MinMax" ), 2 );
mContrastEnhancementAlgorithmComboBox->addItem( tr( "Clip to MinMax" ), 3 );
int nBands = provider->bandCount();
for ( int i = 1; i <= nBands; ++i ) //band numbering seem to start at 1
{
QString bandName = displayBandName( i );
mRedBandComboBox->addItem( bandName, i );
mGreenBandComboBox->addItem( bandName, i );
mBlueBandComboBox->addItem( bandName, i );
}
setFromRenderer( mRasterLayer->renderer() );
onBandChanged( 0 ); // reset mMinMaxWidget bands
connect( mRedMinLineEdit, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
connect( mRedMaxLineEdit, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
connect( mGreenMaxLineEdit, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
connect( mGreenMinLineEdit, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
connect( mBlueMaxLineEdit, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
connect( mBlueMinLineEdit, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
}
}
QgsMultiBandColorRendererWidget::~QgsMultiBandColorRendererWidget()
{
}
QgsRasterRenderer* QgsMultiBandColorRendererWidget::renderer()
{
if ( !mRasterLayer )
{
return nullptr;
}
QgsRasterDataProvider* provider = mRasterLayer->dataProvider();
if ( !provider )
{
return nullptr;
}
int redBand = mRedBandComboBox->itemData( mRedBandComboBox->currentIndex() ).toInt();
int greenBand = mGreenBandComboBox->itemData( mGreenBandComboBox->currentIndex() ).toInt();
int blueBand = mBlueBandComboBox->itemData( mBlueBandComboBox->currentIndex() ).toInt();
QgsMultiBandColorRenderer* r = new QgsMultiBandColorRenderer( provider, redBand, greenBand, blueBand );
setCustomMinMaxValues( r, provider, redBand, greenBand, blueBand );
return r;
}
void QgsMultiBandColorRendererWidget::setMapCanvas( QgsMapCanvas* canvas )
{
QgsRasterRendererWidget::setMapCanvas( canvas );
mMinMaxWidget->setMapCanvas( canvas );
}
void QgsMultiBandColorRendererWidget::createValidators()
{
mRedMinLineEdit->setValidator( new QDoubleValidator( mRedMinLineEdit ) );
mRedMaxLineEdit->setValidator( new QDoubleValidator( mRedMinLineEdit ) );
mGreenMinLineEdit->setValidator( new QDoubleValidator( mGreenMinLineEdit ) );
mGreenMaxLineEdit->setValidator( new QDoubleValidator( mGreenMinLineEdit ) );
mBlueMinLineEdit->setValidator( new QDoubleValidator( mBlueMinLineEdit ) );
mBlueMaxLineEdit->setValidator( new QDoubleValidator( mBlueMinLineEdit ) );
}
void QgsMultiBandColorRendererWidget::setCustomMinMaxValues( QgsMultiBandColorRenderer* r,
const QgsRasterDataProvider* provider,
int redBand, int greenBand, int blueBand )
{
if ( !r || !provider )
{
return;
}
if ( mContrastEnhancementAlgorithmComboBox->itemData( mContrastEnhancementAlgorithmComboBox->currentIndex() ).toInt() ==
QgsContrastEnhancement::NoEnhancement )
{
r->setRedContrastEnhancement( nullptr );
r->setGreenContrastEnhancement( nullptr );
r->setBlueContrastEnhancement( nullptr );
return;
}
QgsContrastEnhancement* redEnhancement = nullptr;
QgsContrastEnhancement* greenEnhancement = nullptr;
QgsContrastEnhancement* blueEnhancement = nullptr;
bool redMinOk, redMaxOk;
double redMin = mRedMinLineEdit->text().toDouble( &redMinOk );
double redMax = mRedMaxLineEdit->text().toDouble( &redMaxOk );
if ( redMinOk && redMaxOk && redBand != -1 )
{
redEnhancement = new QgsContrastEnhancement(( QGis::DataType )(
provider->dataType( redBand ) ) );
redEnhancement->setMinimumValue( redMin );
redEnhancement->setMaximumValue( redMax );
}
bool greenMinOk, greenMaxOk;
double greenMin = mGreenMinLineEdit->text().toDouble( &greenMinOk );
double greenMax = mGreenMaxLineEdit->text().toDouble( &greenMaxOk );
if ( greenMinOk && greenMaxOk && greenBand != -1 )
{
greenEnhancement = new QgsContrastEnhancement(( QGis::DataType )(
provider->dataType( greenBand ) ) );
greenEnhancement->setMinimumValue( greenMin );
greenEnhancement->setMaximumValue( greenMax );
}
bool blueMinOk, blueMaxOk;
double blueMin = mBlueMinLineEdit->text().toDouble( &blueMinOk );
double blueMax = mBlueMaxLineEdit->text().toDouble( &blueMaxOk );
if ( blueMinOk && blueMaxOk && blueBand != -1 )
{
blueEnhancement = new QgsContrastEnhancement(( QGis::DataType )(
provider->dataType( blueBand ) ) );
blueEnhancement->setMinimumValue( blueMin );
blueEnhancement->setMaximumValue( blueMax );
}
if ( redEnhancement )
{
redEnhancement->setContrastEnhancementAlgorithm(( QgsContrastEnhancement::ContrastEnhancementAlgorithm )
( mContrastEnhancementAlgorithmComboBox->itemData( mContrastEnhancementAlgorithmComboBox->currentIndex() ).toInt() ) );
}
if ( greenEnhancement )
{
greenEnhancement->setContrastEnhancementAlgorithm(( QgsContrastEnhancement::ContrastEnhancementAlgorithm )
( mContrastEnhancementAlgorithmComboBox->itemData( mContrastEnhancementAlgorithmComboBox->currentIndex() ).toInt() ) );
}
if ( blueEnhancement )
{
blueEnhancement->setContrastEnhancementAlgorithm(( QgsContrastEnhancement::ContrastEnhancementAlgorithm )
( mContrastEnhancementAlgorithmComboBox->itemData( mContrastEnhancementAlgorithmComboBox->currentIndex() ).toInt() ) );
}
r->setRedContrastEnhancement( redEnhancement );
r->setGreenContrastEnhancement( greenEnhancement );
r->setBlueContrastEnhancement( blueEnhancement );
}
void QgsMultiBandColorRendererWidget::onBandChanged( int index )
{
Q_UNUSED( index );
QList<int> myBands;
myBands.append( mRedBandComboBox->itemData( mRedBandComboBox->currentIndex() ).toInt() );
myBands.append( mGreenBandComboBox->itemData( mGreenBandComboBox->currentIndex() ).toInt() );
myBands.append( mBlueBandComboBox->itemData( mBlueBandComboBox->currentIndex() ).toInt() );
mMinMaxWidget->setBands( myBands );
emit widgetChanged();
}
void QgsMultiBandColorRendererWidget::loadMinMax( int theBandNo, double theMin, double theMax, int theOrigin )
{
Q_UNUSED( theOrigin );
QgsDebugMsg( QString( "theBandNo = %1 theMin = %2 theMax = %3" ).arg( theBandNo ).arg( theMin ).arg( theMax ) );
QLineEdit *myMinLineEdit, *myMaxLineEdit;
if ( mRedBandComboBox->itemData( mRedBandComboBox->currentIndex() ).toInt() == theBandNo )
{
myMinLineEdit = mRedMinLineEdit;
myMaxLineEdit = mRedMaxLineEdit;
}
else if ( mGreenBandComboBox->itemData( mGreenBandComboBox->currentIndex() ).toInt() == theBandNo )
{
myMinLineEdit = mGreenMinLineEdit;
myMaxLineEdit = mGreenMaxLineEdit;
}
else if ( mBlueBandComboBox->itemData( mBlueBandComboBox->currentIndex() ).toInt() == theBandNo )
{
myMinLineEdit = mBlueMinLineEdit;
myMaxLineEdit = mBlueMaxLineEdit;
}
else // should not happen
{
QgsDebugMsg( "Band not found" );
return;
}
if ( qIsNaN( theMin ) )
{
myMinLineEdit->clear();
}
else
{
myMinLineEdit->setText( QString::number( theMin ) );
}
if ( qIsNaN( theMax ) )
{
myMaxLineEdit->clear();
}
else
{
myMaxLineEdit->setText( QString::number( theMax ) );
}
}
void QgsMultiBandColorRendererWidget::setMinMaxValue( const QgsContrastEnhancement* ce, QLineEdit* minEdit, QLineEdit* maxEdit )
{
if ( !minEdit || !maxEdit )
{
return;
}
if ( !ce )
{
minEdit->clear();
maxEdit->clear();
return;
}
minEdit->setText( QString::number( ce->minimumValue() ) );
maxEdit->setText( QString::number( ce->maximumValue() ) );
// QgsMultiBandColorRenderer is using individual contrast enhancements for each
// band, but this widget GUI has one for all
mContrastEnhancementAlgorithmComboBox->setCurrentIndex( mContrastEnhancementAlgorithmComboBox->findData(
( int )( ce->contrastEnhancementAlgorithm() ) ) );
}
void QgsMultiBandColorRendererWidget::setFromRenderer( const QgsRasterRenderer* r )
{
const QgsMultiBandColorRenderer* mbcr = dynamic_cast<const QgsMultiBandColorRenderer*>( r );
if ( mbcr )
{
mRedBandComboBox->setCurrentIndex( mRedBandComboBox->findData( mbcr->redBand() ) );
mGreenBandComboBox->setCurrentIndex( mGreenBandComboBox->findData( mbcr->greenBand() ) );
mBlueBandComboBox->setCurrentIndex( mBlueBandComboBox->findData( mbcr->blueBand() ) );
setMinMaxValue( mbcr->redContrastEnhancement(), mRedMinLineEdit, mRedMaxLineEdit );
setMinMaxValue( mbcr->greenContrastEnhancement(), mGreenMinLineEdit, mGreenMaxLineEdit );
setMinMaxValue( mbcr->blueContrastEnhancement(), mBlueMinLineEdit, mBlueMaxLineEdit );
}
else
{
mRedBandComboBox->setCurrentIndex( mRedBandComboBox->findText( tr( "Red" ) ) );
mGreenBandComboBox->setCurrentIndex( mGreenBandComboBox->findText( tr( "Green" ) ) );
mBlueBandComboBox->setCurrentIndex( mBlueBandComboBox->findText( tr( "Blue" ) ) );
}
}
QString QgsMultiBandColorRendererWidget::min( int index )
{
switch ( index )
{
case 0:
return mRedMinLineEdit->text();
case 1:
return mGreenMinLineEdit->text();
case 2:
return mBlueMinLineEdit->text();
default:
break;
}
return QString();
}
QString QgsMultiBandColorRendererWidget::max( int index )
{
switch ( index )
{
case 0:
return mRedMaxLineEdit->text();
case 1:
return mGreenMaxLineEdit->text();
case 2:
return mBlueMaxLineEdit->text();
default:
break;
}
return QString();
}
void QgsMultiBandColorRendererWidget::setMin( const QString& value, int index )
{
switch ( index )
{
case 0:
mRedMinLineEdit->setText( value );
break;
case 1:
mGreenMinLineEdit->setText( value );
break;
case 2:
mBlueMinLineEdit->setText( value );
break;
default:
break;
}
}
void QgsMultiBandColorRendererWidget::setMax( const QString& value, int index )
{
switch ( index )
{
case 0:
mRedMaxLineEdit->setText( value );
break;
case 1:
mGreenMaxLineEdit->setText( value );
break;
case 2:
mBlueMaxLineEdit->setText( value );
break;
default:
break;
}
}
int QgsMultiBandColorRendererWidget::selectedBand( int index )
{
switch ( index )
{
case 0:
return mRedBandComboBox->currentIndex();
case 1:
return mGreenBandComboBox->currentIndex();
case 2:
return mBlueBandComboBox->currentIndex();
default:
break;
}
return -1;
}