Make sure a hidden shape is never selected (by user interaction)

Add a 'isSelectable' boolean to every shape to allow certain objects
 in the flake hierarchy to be unselectable. Probably usefull for things
like a shape that is a page in KPresenter. Or a shape that is a layer in
Krita.

svn path=/trunk/koffice/; revision=604246

libs/flake/KoInteractionStrategy.cpp

@@ -86,7 +86,7 @@ KoInteractionStrategy* KoInteractionStrategy::createStrategy(KoPointerEvent *eve
             return new KoShapeMoveStrategy(parent, canvas, event->point);
     }
 
-    KoShape * object( shapeManager->shapeAt( event->point ) );
+    KoShape * object( shapeManager->shapeAt( event->point, (event->modifiers() & Qt::ShiftButton) ? KoFlake::NextUnselected : KoFlake::ShapeOnTop, true  ) );
     if( !object && handle == KoFlake::NoHandle) {
         if ( ( event->modifiers() & Qt::ControlModifier ) == 0 )
         {

libs/flake/KoSelection.cpp

@@ -68,6 +68,8 @@ void KoSelection::select(KoShape * object)
 {
     Q_ASSERT(object != this);
     Q_ASSERT(object);
+    if(! object->isSelectable())
+        return;
     if(!m_selectedObjects.contains(object))
         m_selectedObjects << object;
 

libs/flake/KoShape.cpp

@@ -48,6 +48,7 @@ KoShape::KoShape()
 , m_visible( true )
 , m_locked( false )
 , m_keepAspect( false )
+, m_selectable( true )
 , m_userData(0)
 {
     recalcMatrix();

libs/flake/KoShape.h

@@ -292,6 +292,18 @@ public:
      */
     bool isVisible() const { return m_visible; }
 
+    /**
+     * Makes it possible for the user to select this shape.
+     * This parameter defaults to true.
+     * @param locked when true; set the shape to be selectable.
+     */
+    void setSelectable(bool selectable) { m_selectable = selectable; }
+    /**
+     * Returns wheather this shape can be selected by the user.
+     * @return true only when the object is selectable.
+     */
+    bool isSelectable() const { return m_selectable; }
+
     /**
      * Changes the Shape to be locked in place.
      * Being locked means the shape can no longer change shape or position.
@@ -527,7 +539,7 @@ private:
     int m_zIndex;
     KoShapeContainer *m_parent;
 
-    bool m_visible, m_locked, m_keepAspect;
+    bool m_visible, m_locked, m_keepAspect, m_selectable;
 
 
     QSet<KoShapeManager *> m_shapeManagers;

libs/flake/KoShapeRubberSelectStrategy.cpp

@@ -103,6 +103,8 @@ void KoShapeRubberSelectStrategy::finishInteraction( Qt::KeyboardModifiers modif
     QList<KoShape *> shapes( m_canvas->shapeManager()->shapesAt( m_selectRect ) );
     foreach ( KoShape * shape, shapes )
     {
+        if(! (shape->isSelectable() && shape->isVisible()))
+            continue;
         selection->select( shape );
     }
     m_parent->repaintDecorations();