Fixed #2379 - hang on line width set to zero (division by zero)

git-svn-id: http://svn.osgeo.org/qgis/trunk@12803 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

src/core/symbology-ng/qgslinesymbollayerv2.cpp

@@ -56,13 +56,12 @@ QString QgsSimpleLineSymbolLayerV2::layerType() const
   return "SimpleLine";
 }
 
-
 void QgsSimpleLineSymbolLayerV2::startRender( QgsSymbolV2RenderContext& context )
 {
   mPen.setColor( mColor );
   double scaledWidth = context.outputLineWidth( mWidth );
   mPen.setWidthF( scaledWidth );
-  if ( mUseCustomDashPattern )
+  if ( mUseCustomDashPattern && scaledWidth != 0 )
   {
     mPen.setStyle( Qt::CustomDashLine );
 
@@ -116,14 +115,7 @@ QgsStringMap QgsSimpleLineSymbolLayerV2::properties() const
   map["joinstyle"] = QgsSymbolLayerV2Utils::encodePenJoinStyle( mPenJoinStyle );
   map["capstyle"] = QgsSymbolLayerV2Utils::encodePenCapStyle( mPenCapStyle );
   map["offset"] = QString::number( mOffset );
-  if ( mUseCustomDashPattern )
-  {
-    map["use_custom_dash"] = "1";
-  }
-  else
-  {
-    map["use_custom_dash"] = "0";
-  }
+  map["use_custom_dash"] = ( mUseCustomDashPattern ? "1" : "0" );
   map["customdash"] = QgsSymbolLayerV2Utils::encodeRealVector( mCustomDashVector );
   return map;
 }

src/gui/symbology-ng/qgssymbollayerv2widget.cpp

@@ -59,14 +59,7 @@ void QgsSimpleLineSymbolLayerV2Widget::setSymbolLayer( QgsSymbolLayerV2* layer )
   label_3->setEnabled( !useCustomDashPattern );
   cboPenStyle->setEnabled( !useCustomDashPattern );
   mCustomCheckBox->blockSignals( true );
-  if ( useCustomDashPattern )
-  {
-    mCustomCheckBox->setCheckState( Qt::Checked );
-  }
-  else
-  {
-    mCustomCheckBox->setCheckState( Qt::Unchecked );
-  }
+  mCustomCheckBox->setCheckState( useCustomDashPattern ? Qt::Checked : Qt::Unchecked );
   mCustomCheckBox->blockSignals( false );
   updatePatternIcon();
 }