Anti aliasing is now enable/disable able at run time :-)

git-svn-id: http://svn.osgeo.org/qgis/trunk@4664 c8812cc2-4d05-0410-92ff-de0c093fc19c
qgis · Jan 12, 2006 · a676689 · a676689
1 parent 9c6133e
commit a676689
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Showing 4 changed files with 21 additions and 4 deletions.
diff --git a/src/gui/qgisapp.cpp b/src/gui/qgisapp.cpp
@@ -270,6 +270,8 @@ static void setTitleBarText_( QWidget & qgisApp )
   mQgisInterface = new QgisIface(this);
   // set the legend control for the map canvas
   mMapCanvas->setLegend(mMapLegend);
+  QSettings mySettings;
+  mMapCanvas->enableAntiAliasing(mySettings.value("/qgis/enable_anti_aliasing").toBool());
 
 
   //
@@ -4558,6 +4560,8 @@ void QgisApp::options()
     setupToolbarPopups(optionsDialog->theme());
     // set the visible flag for new layers
     mAddedLayersHidden = optionsDialog->newVisible();
+    QSettings mySettings;
+    mMapCanvas->enableAntiAliasing(mySettings.value("/qgis/enable_anti_aliasing").toBool());
   }
 }
 

diff --git a/src/gui/qgsmapcanvas.cpp b/src/gui/qgsmapcanvas.cpp
@@ -143,6 +143,10 @@ QgsMapCanvas::~QgsMapCanvas()
   // CanvasProperties struct has its own dtor for freeing resources
 } // dtor
 
+void QgsMapCanvas::enableAntiAliasing(bool theFlag)
+{
+  mCanvasProperties->mAntiAliasFlag= theFlag;
+} // anti aliasing
 
 
 void QgsMapCanvas::setLegend(QgsLegend * legend)
@@ -555,7 +559,10 @@ void QgsMapCanvas::render(QPaintDevice * theQPaintDevice)
       {
         mCanvasProperties->pmCanvas->fill(mCanvasProperties->bgColor);
         paint->begin(mCanvasProperties->pmCanvas);
-        paint->setRenderHint(QPainter::Antialiasing);
+        if (mCanvasProperties->mAntiAliasFlag)
+        {
+          paint->setRenderHint(QPainter::Antialiasing);
+        }
         myHeight=height();
         myWidth=width();
       }
@@ -576,7 +583,10 @@ void QgsMapCanvas::render(QPaintDevice * theQPaintDevice)
         }
         //initialise the painter
         paint->begin(theQPaintDevice);
-        paint->setRenderHint(QPainter::Antialiasing);
+        if (mCanvasProperties->mAntiAliasFlag)
+        {
+          paint->setRenderHint(QPainter::Antialiasing);
+        }
       }
       // hardwire the current extent for projection testing
       //     mCanvasProperties->currentExtent.setXmin(-156.00);

diff --git a/src/gui/qgsmapcanvas.h b/src/gui/qgsmapcanvas.h
@@ -185,7 +185,8 @@ class QgsMapCanvas : public QWidget
     //! true if canvas currently drawing
     bool isDrawing();
 
-
+    //used to determine if anti-aliasing is enabled or not
+    void enableAntiAliasing(bool theFlag);
 public slots:
 
     /*! Adds a layer to the map canvas.

diff --git a/src/gui/qgsmapcanvasproperties.h b/src/gui/qgsmapcanvasproperties.h
@@ -251,7 +251,9 @@ class QgsMapCanvas::CanvasProperties
 
   //! Map scale of the canvas at its current zool level
              double mScale;
-
+
+  //! Whether to anti-alias map line drawing
+  bool mAntiAliasFlag;
   private:
 
   /** not copyable