void QgsSingleBandPseudoColorRendererWidget::on_mSortButton_clicked()
{
bool inserted = false;
int myCurrentIndex = 0;
int myTopLevelItemCount = mColormapTreeWidget->topLevelItemCount();
QTreeWidgetItem* myCurrentItem;
QList<QgsColorRampShader::ColorRampItem> myColorRampItems;
for ( int i = 0; i < myTopLevelItemCount; ++i )
{
myCurrentItem = mColormapTreeWidget->topLevelItem( i );
//If the item is null or does not have a pixel values set, skip
if ( !myCurrentItem || myCurrentItem->text( 0 ) == "" )
{
continue;
}
//Create a copy of the new Color ramp Item
QgsColorRampShader::ColorRampItem myNewColorRampItem;
myNewColorRampItem.value = myCurrentItem->text( 0 ).toDouble();
myNewColorRampItem.color = myCurrentItem->background( 1 ).color();
myNewColorRampItem.label = myCurrentItem->text( 2 );
//Simple insertion sort - speed is not a huge factor here
inserted = false;
myCurrentIndex = 0;
while ( !inserted )
{
if ( 0 == myColorRampItems.size() || myCurrentIndex == myColorRampItems.size() )
{
myColorRampItems.push_back( myNewColorRampItem );
inserted = true;
}
else if ( myColorRampItems[myCurrentIndex].value > myNewColorRampItem.value )
{
myColorRampItems.insert( myCurrentIndex, myNewColorRampItem );
inserted = true;
}
else if ( myColorRampItems[myCurrentIndex].value <= myNewColorRampItem.value && myCurrentIndex == myColorRampItems.size() - 1 )
{
myColorRampItems.push_back( myNewColorRampItem );
inserted = true;
}
else if ( myColorRampItems[myCurrentIndex].value <= myNewColorRampItem.value && myColorRampItems[myCurrentIndex+1].value > myNewColorRampItem.value )
{
myColorRampItems.insert( myCurrentIndex + 1, myNewColorRampItem );
inserted = true;
}
myCurrentIndex++;
}
}
populateColormapTreeWidget( myColorRampItems );
}
void QgsSingleBandPseudoColorRendererWidget::on_mLoadFromBandButton_clicked()
{
if ( !mRasterLayer )
{
return;
}
QList<QgsColorRampShader::ColorRampItem> colorRampList;
int bandIndex = mBandComboBox->itemData( mBandComboBox->currentIndex() ).toInt();
if ( mRasterLayer->readColorTable( bandIndex, &colorRampList ) )
{
populateColormapTreeWidget( colorRampList );
mColorInterpolationComboBox->setCurrentIndex( mColorInterpolationComboBox->findText( tr( "Linear" ) ) );
}
else
{
QMessageBox::warning( this, tr( "Load Color Map" ), tr( "The color map for band %1 failed to load" ).arg( bandIndex ) );
}
}
void QgsSingleBandPseudoColorRendererWidget::on_mLoadFromBandButton_clicked()
{
if ( !mRasterLayer || !mRasterLayer->dataProvider() )
{
return;
}
int bandIndex = mBandComboBox->itemData( mBandComboBox->currentIndex() ).toInt();
QList<QgsColorRampShader::ColorRampItem> colorRampList = mRasterLayer->dataProvider()->colorTable( bandIndex );
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( bandIndex ) );
}
emit widgetChanged();
}
void QgsSingleBandPseudoColorRendererWidget::on_mLoadFromFileButton_clicked()
{
int lineCounter = 0;
bool importError = false;
QString badLines;
QSettings settings;
QString lastDir = settings.value( "lastColorMapDir", QDir::homePath() ).toString();
QString fileName = QFileDialog::getOpenFileName( this, tr( "Open 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( "INTERPOLATION", Qt::CaseInsensitive ) )
{
inputStringComponents = inputLine.split( ':' );
if ( inputStringComponents.size() == 2 )
{
if ( inputStringComponents[1].trimmed().toUpper().compare( "INTERPOLATED", Qt::CaseInsensitive ) == 0 )
{
mColorInterpolationComboBox->setCurrentIndex( mColorInterpolationComboBox->findData( QgsColorRampShader::INTERPOLATED ) );
}
else if ( inputStringComponents[1].trimmed().toUpper().compare( "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( "lastColorMapDir", fileInfo.absoluteDir().absolutePath() );
if ( importError )
{
QMessageBox::warning( this, tr( "Import Error" ), tr( "The following lines contained errors\n\n" ) + badLines );
}
}
else if ( !fileName.isEmpty() )
{
QMessageBox::warning( this, tr( "Read access denied" ), tr( "Read access denied. Adjust the file permissions and try again.\n\n" ) );
}
emit widgetChanged();
}
