void QgsSingleBandPseudoColorRendererWidget::on_mColorRampComboBox_currentIndexChanged( int index )
{
Q_UNUSED( index );
QSettings settings;
settings.setValue( "/Raster/defaultPalette", mColorRampComboBox->currentText() );
QgsVectorColorRampV2* ramp = mColorRampComboBox->currentColorRamp();
if ( !ramp )
return;
bool enableContinuous = ( ramp->count() > 0 );
mClassificationModeComboBox->setEnabled( enableContinuous );
if ( !enableContinuous )
{
mClassificationModeComboBox->setCurrentIndex( mClassificationModeComboBox->findData( EqualInterval ) );
}
}
void QgsSingleBandPseudoColorRendererWidget::on_mClassifyButton_clicked()
{
int bandComboIndex = mBandComboBox->currentIndex();
if ( bandComboIndex == -1 || !mRasterLayer )
{
return;
}
//int bandNr = mBandComboBox->itemData( bandComboIndex ).toInt();
//QgsRasterBandStats myRasterBandStats = mRasterLayer->dataProvider()->bandStatistics( bandNr );
int numberOfEntries = 0;
QList<double> entryValues;
QList<QColor> entryColors;
double min = lineEditValue( mMinLineEdit );
double max = lineEditValue( mMaxLineEdit );
QgsVectorColorRampV2* colorRamp = mColorRampComboBox->currentColorRamp();
if ( mClassificationModeComboBox->itemData( mClassificationModeComboBox->currentIndex() ).toInt() == Continuous )
{
if ( colorRamp )
{
numberOfEntries = colorRamp->count();
entryValues.reserve( colorRamp->count() );
for ( int i = 0; i < colorRamp->count(); ++i )
{
double value = colorRamp->value( i );
entryValues.push_back( min + value * ( max - min ) );
}
}
}
else // EqualInterval
{
numberOfEntries = mNumberOfEntriesSpinBox->value();
//double currentValue = myRasterBandStats.minimumValue;
double currentValue = min;
double intervalDiff;
if ( numberOfEntries > 1 )
{
//because the highest value is also an entry, there are (numberOfEntries - 1)
//intervals
//intervalDiff = ( myRasterBandStats.maximumValue - myRasterBandStats.minimumValue ) /
intervalDiff = ( max - min ) / ( numberOfEntries - 1 );
}
else
{
//intervalDiff = myRasterBandStats.maximumValue - myRasterBandStats.minimumValue;
intervalDiff = max - min;
}
entryValues.reserve( numberOfEntries );
for ( int i = 0; i < numberOfEntries; ++i )
{
entryValues.push_back( currentValue );
currentValue += intervalDiff;
}
}
#if 0
//hard code color range from blue -> red for now. Allow choice of ramps in future
int colorDiff = 0;
if ( numberOfEntries != 0 )
{
colorDiff = ( int )( 255 / numberOfEntries );
}
for ( int i = 0; i < numberOfEntries; ++i )
{
QColor currentColor;
currentColor.setRgb( colorDiff*i, 0, 255 - colorDiff * i );
entryColors.push_back( currentColor );
}
#endif
if ( ! colorRamp )
{
//hard code color range from blue -> red (previous default)
int colorDiff = 0;
if ( numberOfEntries != 0 )
{
colorDiff = ( int )( 255 / numberOfEntries );
}
entryColors.reserve( numberOfEntries );
for ( int i = 0; i < numberOfEntries; ++i )
{
QColor currentColor;
int idx = mInvertCheckBox->isChecked() ? numberOfEntries - i - 1 : i;
currentColor.setRgb( colorDiff*idx, 0, 255 - colorDiff * idx );
entryColors.push_back( currentColor );
}
}
else
{
entryColors.reserve( numberOfEntries );
for ( int i = 0; i < numberOfEntries; ++i )
{
int idx = mInvertCheckBox->isChecked() ? numberOfEntries - i - 1 : i;
entryColors.push_back( colorRamp->color((( double ) idx ) / ( numberOfEntries - 1 ) ) );
}
}
mColormapTreeWidget->clear();
QList<double>::const_iterator value_it = entryValues.begin();
QList<QColor>::const_iterator color_it = entryColors.begin();
for ( ; value_it != entryValues.end(); ++value_it, ++color_it )
{
QTreeWidgetItem* newItem = new QTreeWidgetItem( mColormapTreeWidget );
newItem->setText( 0, QString::number( *value_it, 'f' ) );
newItem->setBackground( 1, QBrush( *color_it ) );
newItem->setText( 2, QString::number( *value_it, 'f' ) );
newItem->setFlags( Qt::ItemIsEnabled | Qt::ItemIsEditable | Qt::ItemIsSelectable );
}
}