void QgsLegendLayer::rasterLayerSymbology( QgsRasterLayer* layer )
{
SymbologyList itemList;
QList< QPair< QString, QColor > > rasterItemList = layer->legendSymbologyItems();
QList< QPair< QString, QColor > >::const_iterator itemIt = rasterItemList.constBegin();
#if QT_VERSION >= 0x40700
itemList.reserve( rasterItemList.size() );
#endif
// GetLegendGraphics in case of WMS service... pixmap can return null if GetLegendGraphics
// is not supported by the server
QgsDebugMsg( QString( "layer providertype:: %1" ).arg( layer->providerType() ) );
if ( layer->providerType() == "wms" )
{
double currentScale = legend()->canvas()->scale();
QImage legendGraphic = layer->dataProvider()->getLegendGraphic( currentScale );
if ( !legendGraphic.isNull() )
{
QgsDebugMsg( QString( "downloaded legend with dimension width:" ) + QString::number( legendGraphic.width() ) + QString( " and Height:" ) + QString::number( legendGraphic.height() ) );
#if QT_VERSION >= 0x40700
if ( rasterItemList.size() == 0 ) itemList.reserve( 1 );
#endif
itemList.append( qMakePair( QString( "" ), QPixmap::fromImage( legendGraphic ) ) );
}
}
// Paletted raster may have many colors, for example UInt16 may have 65536 colors
// and it is very slow, so we limit max count
QSize iconSize = treeWidget()->iconSize();
int count = 0;
int max_count = 1000;
for ( ; itemIt != rasterItemList.constEnd(); ++itemIt )
{
QPixmap itemPixmap( iconSize );
itemPixmap.fill( itemIt->second );
// This is very slow, not clear why, it should not be, probably realloc,
// but it seems to be non linear
itemList.append( qMakePair( itemIt->first, itemPixmap ) );
count++;
if ( count == max_count )
{
itemPixmap = QPixmap( iconSize );
itemPixmap.fill( Qt::transparent );
QString label = tr( "following %1 items\nnot displayed" ).arg( rasterItemList.size() - max_count );
itemList.append( qMakePair( label, itemPixmap ) );
break;
}
}
changeSymbologySettings( layer, itemList );
}
void QgsLegendLayer::rasterLayerSymbology( QgsRasterLayer* layer )
{
SymbologyList itemList;
QList< QPair< QString, QColor > > rasterItemList = layer->legendSymbologyItems();
QList< QPair< QString, QColor > >::const_iterator itemIt = rasterItemList.constBegin();
#if QT_VERSION >= 0x40700
itemList.reserve( rasterItemList.size() );
#endif
// Paletted raster may have many colors, for example UInt16 may have 65536 colors
// and it is very slow, so we limit max count
QSize iconSize = treeWidget()->iconSize();
int count = 0;
int max_count = 1000;
for ( ; itemIt != rasterItemList.constEnd(); ++itemIt )
{
QPixmap itemPixmap( iconSize );
itemPixmap.fill( itemIt->second );
// This is very slow, not clear why, it should not be, probably realloc,
// but it seems to be non linear
itemList.append( qMakePair( itemIt->first, itemPixmap ) );
count++;
if ( count == max_count )
{
itemPixmap = QPixmap( iconSize );
itemPixmap.fill( Qt::transparent );
QString label = tr( "following %1 items\nnot displayed" ).arg( rasterItemList.size() - max_count );
itemList.append( qMakePair( label, itemPixmap ) );
break;
}
}
changeSymbologySettings( layer, itemList );
}