void QgsLegendLayer::changeSymbologySettings( const QgsMapLayer* theMapLayer,
const SymbologyList& newSymbologyItems )
{
if ( !theMapLayer )
{
return;
}
QgsLegendSymbologyItem* theSymbologyItem = 0;
//remove the symbology items under the legend layer
for ( int i = childCount(); i >= 0; --i )
{
theSymbologyItem = dynamic_cast<QgsLegendSymbologyItem *>( child( i ) );
if ( theSymbologyItem )
{
delete takeChild( i );
}
}
//add the new symbology items
int childposition = 0; //position to insert the items
for ( SymbologyList::const_iterator it = newSymbologyItems.begin(); it != newSymbologyItems.end(); ++it )
{
QgsLegendSymbologyItem* theItem = new QgsLegendSymbologyItem( it->second.width(), it->second.height() );
theItem->setText( 0, it->first );
theItem->setIcon( 0, QIcon( it->second ) );
insertChild( childposition, theItem );
++childposition;
}
}
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 );
}
void QgsLegendLayer::rasterLayerSymbology( QgsRasterLayer* layer )
{
SymbologyList itemList;
QPixmap legendpixmap = layer->legendAsPixmap( true ).scaled( 20, 20, Qt::KeepAspectRatio );
itemList.append( qMakePair( QString(), legendpixmap ) );
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();
for ( ; itemIt != rasterItemList.constEnd(); ++itemIt )
{
QPixmap itemPixmap( treeWidget()->iconSize() );
itemPixmap.fill( itemIt->second );
itemList.append( qMakePair( itemIt->first, itemPixmap ) );
}
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
// 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::vectorLayerSymbology( QgsVectorLayer* layer, double widthScale )
{
if ( !layer )
{
return;
}
SymbologyList itemList;
if ( layer->hasGeometryType() )
{
//add the new items
QString lw, uv, label;
const QgsRenderer* renderer = layer->renderer();
const QList<QgsSymbol*> sym = renderer->symbols();
//create an item for each classification field (only one for most renderers)
QSettings settings;
if ( settings.value( "/qgis/showLegendClassifiers", false ).toBool() )
{
if ( renderer->needsAttributes() )
{
QgsAttributeList classfieldlist = renderer->classificationAttributes();
const QgsFieldMap& fields = layer->pendingFields();
for ( QgsAttributeList::iterator it = classfieldlist.begin(); it != classfieldlist.end(); ++it )
{
QString classfieldname = layer->attributeAlias( *it );
if ( classfieldname.isEmpty() )
{
classfieldname = fields[*it].name();
}
itemList.append( qMakePair( classfieldname, QPixmap() ) );
}
}
}
QMap< QgsSymbol*, int > featureCountMap;
if ( mShowFeatureCount )
{
updateItemListCount( layer, sym, featureCountMap );
}
for ( QList<QgsSymbol*>::const_iterator it = sym.begin(); it != sym.end(); ++it )
{
QImage img;
if (( *it )->type() == QGis::Point )
{
img = ( *it )->getPointSymbolAsImage( widthScale );
}
else if (( *it )->type() == QGis::Line )
{
img = ( *it )->getLineSymbolAsImage();
}
else if (( *it )->type() == QGis::Polygon )
{
img = ( *it )->getPolygonSymbolAsImage();
}
else
{
// must be a layer without geometry then
}
QString values;
lw = ( *it )->lowerValue();
if ( !lw.isEmpty() )
{
values += lw;
}
uv = ( *it )->upperValue();
if ( !uv.isEmpty() && lw != uv )
{
values += " - ";
values += uv;
}
label = ( *it )->label();
if ( !label.isEmpty() )
{
values += " ";
values += label;
}
if ( mShowFeatureCount )
{
int fCount = featureCountMap[*it];
if ( fCount >= 0 )
{
values += ( " [" + QString::number( fCount ) + "]" );
}
}
QPixmap pix = QPixmap::fromImage( img ); // convert to pixmap
itemList.append( qMakePair( values, pix ) );
}
}
changeSymbologySettings( layer, itemList );
}