Read optional legend parameters from GetLegendGraphic request (extens…

…ion to WMS)
qgis · Jan 14, 2012 · e800caa · e800caa
1 parent 5618608
commit e800caa
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Showing 2 changed files with 88 additions and 13 deletions.
diff --git a/src/mapserver/qgswmsserver.cpp b/src/mapserver/qgswmsserver.cpp
@@ -309,23 +309,16 @@ QImage* QgsWMSServer::getLegendGraphics()
     return 0;
   }
   double mmToPixelFactor = theImage->dotsPerMeterX() / 1000;
-
-  //get icon size, spaces between legend items and font from config parser
-  double boxSpace, layerSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight;
-  boxSpace = mConfigParser->legendBoxSpace() * mmToPixelFactor;
-  layerSpace = mConfigParser->legendLayerSpace() * mmToPixelFactor;
-  symbolSpace = mConfigParser->legendSymbolSpace() * mmToPixelFactor;
-  iconLabelSpace = mConfigParser->legendIconLabelSpace() * mmToPixelFactor;
-  symbolWidth = mConfigParser->legendSymbolWidth() * mmToPixelFactor;
-  symbolHeight = mConfigParser->legendSymbolHeight() * mmToPixelFactor;
   double maxTextWidth = 0;
   double maxSymbolWidth = 0;
   double currentY = 0;
   double fontOversamplingFactor = 10.0;
-  QFont layerFont = mConfigParser->legendLayerFont();
-  layerFont.setPixelSize( layerFont.pointSizeF() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
-  QFont itemFont = mConfigParser->legendItemFont();
-  itemFont.setPixelSize( itemFont.pointSizeF() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
+
+  //get icon size, spaces between legend items and font from config parser
+  double boxSpace, layerSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight;
+  QFont layerFont, itemFont;
+  legendParameters( mmToPixelFactor, fontOversamplingFactor, boxSpace, layerSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight,
+                    layerFont, itemFont );
 
   //first find out image dimensions without painting
   QStandardItem* rootItem = legendModel.invisibleRootItem();
@@ -376,6 +369,84 @@ QImage* QgsWMSServer::getLegendGraphics()
   return paintImage;
 }
 
+void QgsWMSServer::legendParameters( double mmToPixelFactor, double fontOversamplingFactor, double& boxSpace, double& layerSpace, double& symbolSpace, double& iconLabelSpace, double& symbolWidth, double& symbolHeight,
+                                     QFont& layerFont, QFont& itemFont )
+{
+  //spaces between legend elements
+  QMap<QString, QString>::const_iterator boxSpaceIt = mParameterMap.find( "BOXSPACE" );
+  boxSpace = ( boxSpaceIt == mParameterMap.constEnd() ) ? mConfigParser->legendBoxSpace() * mmToPixelFactor :
+             boxSpaceIt.value().toDouble() * mmToPixelFactor;
+  QMap<QString, QString>::const_iterator layerSpaceIt = mParameterMap.find( "LAYERSPACE" );
+  layerSpace = ( layerSpaceIt == mParameterMap.constEnd() ) ? mConfigParser->legendLayerSpace() * mmToPixelFactor :
+               layerSpaceIt.value().toDouble() * mmToPixelFactor;
+  QMap<QString, QString>::const_iterator symbolSpaceIt = mParameterMap.find( "SYMBOLSPACE" );
+  symbolSpace = ( symbolSpaceIt == mParameterMap.constEnd() ) ? mConfigParser->legendSymbolSpace() * mmToPixelFactor :
+                symbolSpaceIt.value().toDouble() * mmToPixelFactor;
+  QMap<QString, QString>::const_iterator iconLabelSpaceIt = mParameterMap.find( "ICONLABELSPACE" );
+  iconLabelSpace = ( iconLabelSpaceIt == mParameterMap.constEnd() ) ? mConfigParser->legendIconLabelSpace() * mmToPixelFactor :
+                   iconLabelSpaceIt.value().toDouble() * mmToPixelFactor;
+  QMap<QString, QString>::const_iterator symbolWidthIt = mParameterMap.find( "SYMBOLWIDTH" );
+  symbolWidth = ( symbolWidthIt == mParameterMap.constEnd() ) ? mConfigParser->legendSymbolWidth() * mmToPixelFactor :
+                symbolWidthIt.value().toDouble() * mmToPixelFactor;
+  QMap<QString, QString>::const_iterator symbolHeightIt = mParameterMap.find( "SYMBOLHEIGHT" );
+  symbolHeight = ( symbolHeightIt == mParameterMap.constEnd() ) ? mConfigParser->legendSymbolHeight() * mmToPixelFactor :
+                 symbolHeightIt.value().toDouble() * mmToPixelFactor;
+
+  //font properties
+  layerFont = mConfigParser->legendLayerFont();
+  QMap<QString, QString>::const_iterator layerFontFamilyIt = mParameterMap.find( "LAYERFONTFAMILY" );
+  if ( layerFontFamilyIt != mParameterMap.constEnd() )
+  {
+    layerFont.setFamily( layerFontFamilyIt.value() );
+  }
+  QMap<QString, QString>::const_iterator layerFontBoldIt = mParameterMap.find( "LAYERFONTBOLD" );
+  if ( layerFontBoldIt != mParameterMap.constEnd() )
+  {
+    layerFont.setBold( layerFontBoldIt.value().compare( "TRUE" , Qt::CaseInsensitive ) == 0 );
+  }
+  QMap<QString, QString>::const_iterator layerFontItalicIt = mParameterMap.find( "LAYERFONTITALIC" );
+  if ( layerFontItalicIt != mParameterMap.constEnd() )
+  {
+    layerFont.setItalic( layerFontItalicIt.value().compare( "TRUE", Qt::CaseInsensitive ) == 0 );
+  }
+  QMap<QString, QString>::const_iterator layerFontSizeIt = mParameterMap.find( "LAYERFONTSIZE" );
+  if ( layerFontSizeIt != mParameterMap.constEnd() )
+  {
+    layerFont.setPixelSize( layerFontSizeIt.value().toDouble() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
+  }
+  else
+  {
+    layerFont.setPixelSize( layerFont.pointSizeF() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
+  }
+
+
+  itemFont = mConfigParser->legendItemFont();
+  QMap<QString, QString>::const_iterator itemFontFamilyIt = mParameterMap.find( "ITEMFONTFAMILY" );
+  if ( itemFontFamilyIt != mParameterMap.constEnd() )
+  {
+    itemFont.setFamily( itemFontFamilyIt.value() );
+  }
+  QMap<QString, QString>::const_iterator itemFontBoldIt = mParameterMap.find( "ITEMFONTBOLD" );
+  if ( itemFontBoldIt != mParameterMap.constEnd() )
+  {
+    itemFont.setBold( itemFontBoldIt.value().compare( "TRUE" , Qt::CaseInsensitive ) == 0 );
+  }
+  QMap<QString, QString>::const_iterator itemFontItalicIt = mParameterMap.find( "ITEMFONTITALIC" );
+  if ( itemFontItalicIt != mParameterMap.constEnd() )
+  {
+    itemFont.setItalic( itemFontItalicIt.value().compare( "TRUE", Qt::CaseInsensitive ) == 0 );
+  }
+  QMap<QString, QString>::const_iterator itemFontSizeIt = mParameterMap.find( "ITEMFONTSIZE" );
+  if ( itemFontSizeIt != mParameterMap.constEnd() )
+  {
+    itemFont.setPixelSize( itemFontSizeIt.value().toDouble() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
+  }
+  else
+  {
+    itemFont.setPixelSize( itemFont.pointSizeF() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
+  }
+}
+
 QDomDocument QgsWMSServer::getStyle()
 {
   QDomDocument doc;

diff --git a/src/mapserver/qgswmsserver.h b/src/mapserver/qgswmsserver.h
@@ -138,6 +138,10 @@ class QgsWMSServer
     void drawLegendSymbolV2( QgsComposerLegendItem* item, QPainter* p, double boxSpace, double currentY, double& symbolWidth, double& symbolHeight, double dpi, double yDownShift ) const;
     void drawRasterSymbol( QgsComposerLegendItem* item, QPainter* p, double boxSpace, double currentY, double symbolWidth, double symbolHeight, double yDownShift ) const;
 
+    /**Read legend parameter from the request or from the first print composer in the project*/
+    void legendParameters( double mmToPixelFactor, double fontOversamplingFactor, double& boxSpace, double& layerSpace, double& symbolSpace, double& iconLabelSpace, double& symbolWidth, double& symbolHeight,
+                           QFont& layerFont, QFont& itemFont );
+
     QImage* printCompositionToImage( QgsComposition* c ) const;
 
     /**Apply filter (subset) strings from the request to the layers. Example: '&FILTER=<layer1>:"AND property > 100",<layer2>:"AND bla = 'hallo!'" '