Enable composition mode for advanced drawing (#6009)

* Enable composition mode for advanced drawing Makes the lines pop off the map more and not get lost in the background. Also adjusts the line size up to 1 as .7 it really small.
qgis · Jan 8, 2018 · 617459d · 617459d
1 parent 3d36653
commit 617459d
Showing 1 changed file with 7 additions and 6 deletions.
diff --git a/src/gui/qgsadvanceddigitizingcanvasitem.cpp b/src/gui/qgsadvanceddigitizingcanvasitem.cpp
@@ -22,12 +22,12 @@
 
 QgsAdvancedDigitizingCanvasItem::QgsAdvancedDigitizingCanvasItem( QgsMapCanvas *canvas, QgsAdvancedDigitizingDockWidget *cadDockWidget )
   : QgsMapCanvasItem( canvas )
-  , mLockedPen( QPen( QColor( 100, 100, 255, 255 ), .7, Qt::DashLine ) )
-  , mConstruction1Pen( QPen( QColor( 100, 255, 100, 150 ), .7, Qt::DashLine ) )
-  , mConstruction2Pen( QPen( QColor( 100, 255, 100, 255 ), .7, Qt::DashLine ) )
-  , mSnapPen( QPen( QColor( 255, 175, 100, 150 ), 7 ) )
-  , mSnapLinePen( QPen( QColor( 200, 100, 50, 150 ), .7, Qt::DashLine ) )
-  , mCursorPen( QPen( QColor( 100, 255, 100, 255 ), .7 ) )
+  , mLockedPen( QPen( QColor( 0, 127, 0, 255 ), 1, Qt::DashLine ) )
+  , mConstruction1Pen( QPen( QColor( 127, 127, 127, 150 ), 1, Qt::DashLine ) )
+  , mConstruction2Pen( QPen( QColor( 127, 127, 127, 255 ), 1, Qt::DashLine ) )
+  , mSnapPen( QPen( QColor( 127, 0, 0, 150 ), 1 ) )
+  , mSnapLinePen( QPen( QColor( 127, 0, 0, 150 ), 1, Qt::DashLine ) )
+  , mCursorPen( QPen( QColor( 127, 127, 127, 255 ), 1 ) )
   , mAdvancedDigitizingDockWidget( cadDockWidget )
 {
 }
@@ -80,6 +80,7 @@ void QgsAdvancedDigitizingCanvasItem::paint( QPainter *painter )
   }
 
   painter->setRenderHints( QPainter::Antialiasing );
+  painter->setCompositionMode( QPainter::CompositionMode_Difference );
 
   // Draw point snap
   if ( curPointExist && snappedToVertex )