From: ouv <ouv@opencascade.com>
Date: Fri, 15 Jul 2011 13:48:29 +0000 (+0000)
Subject: 1) Small improvement of the highlight mechanism
X-Git-Tag: CTH_V17a~27
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=d43aa2cde8459851668ac0db3b49a049ce567209;p=modules%2Fgui.git

1) Small improvement of the highlight mechanism
2) Introduced possibility of handling mouse events by objects
---

diff --git a/src/GraphicsView/GraphicsView_Object.cxx b/src/GraphicsView/GraphicsView_Object.cxx
index a884e1bbf..33200c30d 100644
--- a/src/GraphicsView/GraphicsView_Object.cxx
+++ b/src/GraphicsView/GraphicsView_Object.cxx
@@ -31,6 +31,7 @@
 GraphicsView_Object::GraphicsView_Object( QGraphicsItem* theParent )
 : QGraphicsItemGroup( theParent ),
   myPriority( 0 ),
+  myIsOnTop( false ),
   myIsHighlighted( false ),
   myIsSelected( false )
 {
diff --git a/src/GraphicsView/GraphicsView_Object.h b/src/GraphicsView/GraphicsView_Object.h
index c1e06cdfb..5fd908c34 100644
--- a/src/GraphicsView/GraphicsView_Object.h
+++ b/src/GraphicsView/GraphicsView_Object.h
@@ -44,6 +44,9 @@ public:
 
   virtual int                getPriority() const { return myPriority; }
 
+  virtual bool               isOnTop() const { return myIsOnTop; }
+  virtual void               setIsOnTop( bool theIsOnTop ) { myIsOnTop = theIsOnTop; }
+
   virtual bool               isSelectable() const { return true; }
   virtual bool               isMovable() const { return true; }
 
@@ -72,6 +75,10 @@ public:
   virtual void               finishPulling() {}
   virtual bool               isPulling() { return false; }
 
+  virtual bool               handleMousePress( QGraphicsSceneMouseEvent* ) { return false; }
+  virtual bool               handleMouseMove( QGraphicsSceneMouseEvent* ) { return false; }
+  virtual bool               handleMouseRelease( QGraphicsSceneMouseEvent* ) { return false; }
+
 protected:
   virtual bool               checkHighlight( double theX, double theY ) const;
 
@@ -79,6 +86,7 @@ protected:
   QString                    myName;
 
   int                        myPriority;
+  bool                       myIsOnTop;
 
   bool                       myIsHighlighted;
   bool                       myIsSelected;
diff --git a/src/GraphicsView/GraphicsView_ViewPort.cxx b/src/GraphicsView/GraphicsView_ViewPort.cxx
index 8d5641b35..a92833b6b 100644
--- a/src/GraphicsView/GraphicsView_ViewPort.cxx
+++ b/src/GraphicsView/GraphicsView_ViewPort.cxx
@@ -281,6 +281,7 @@ GraphicsView_ObjectList GraphicsView_ViewPort::getObjects( bool theIsSortSelecte
   // to append selected objects after their non-selected siblings with similar priority
   int aCurrentPriority = -1;
   GraphicsView_ObjectList aSelectedObjects;
+  GraphicsView_ObjectList aTopmostObjects;
 
   GraphicsView_ObjectList aList;
   GraphicsView_ObjectListIterator anIter( myObjects );
@@ -288,6 +289,12 @@ GraphicsView_ObjectList GraphicsView_ViewPort::getObjects( bool theIsSortSelecte
   {
     if( GraphicsView_Object* anObject = anIter.next() )
     {
+      if( anObject->isOnTop() )
+      {
+        aTopmostObjects.append( anObject );
+        continue;
+      }
+
       int aPriority = anObject->getPriority();
       if( aPriority > aCurrentPriority  )
       {
@@ -314,6 +321,8 @@ GraphicsView_ObjectList GraphicsView_ViewPort::getObjects( bool theIsSortSelecte
     aSelectedObjects.clear();
   }
 
+  aList.append( aTopmostObjects );
+
   return aList;
 }
 
@@ -1364,30 +1373,46 @@ void GraphicsView_ViewPort::onMouseEvent( QGraphicsSceneMouseEvent* e )
 {
   emit vpMouseEvent( e );
 
+  bool anIsHandled = false;
   switch( e->type() )
   {
     case QEvent::GraphicsSceneMousePress:
     {
-      if( testInteractionFlags( Dragging ) )
+      if( nbSelected() )
+        for( initSelected(); moreSelected() && !anIsHandled; nextSelected() )
+          if( GraphicsView_Object* anObject = selectedObject() )
+            anIsHandled = anObject->handleMousePress( e );
+
+      if( !anIsHandled && testInteractionFlags( Dragging ) )
       {
         bool anAccel = e->modifiers() & GraphicsView_ViewTransformer::accelKey();
         if( ( getHighlightedObject() &&
               getHighlightedObject()->isMovable() &&
               !( anAccel || e->button() == Qt::RightButton ) ) ||
             ( nbSelected() && !anAccel && e->button() == Qt::MidButton ) )
-          myIsDragging = true;
+        myIsDragging = true;
       }
       break;
     }
     case QEvent::GraphicsSceneMouseMove:
     {
-      if( !isPulling() && myIsDragging )
+      if( nbSelected() )
+        for( initSelected(); moreSelected() && !anIsHandled; nextSelected() )
+          if( GraphicsView_Object* anObject = selectedObject() )
+            anIsHandled = anObject->handleMousePress( e );
+
+      if( !anIsHandled && !isPulling() && myIsDragging )
         dragObjects( e );
       break;
     }
     case QEvent::GraphicsSceneMouseRelease:
     {
-      if( !isPulling() && myIsDragging )
+      if( nbSelected() )
+        for( initSelected(); moreSelected() && !anIsHandled; nextSelected() )
+          if( GraphicsView_Object* anObject = selectedObject() )
+            anIsHandled = anObject->handleMousePress( e );
+
+      if( !anIsHandled && !isPulling() && myIsDragging )
       {
         emit vpObjectBeforeMoving();