implement optionally checking visibility recursively

svn path=/trunk/koffice/; revision=811861

libs/flake/KoShape.cpp

@@ -542,15 +542,24 @@ void KoShape::setVisible(bool on) {
     d->visible = on;
 }
 
-bool KoShape::isVisible() const {
-    return d->visible;
+bool KoShape::isVisible( bool recursive ) const {
+    if( ! recursive )
+        return d->visible;
+    KoShapeContainer * parentShape = parent();
+    while( parentShape )
+    {
+        if( ! parentShape->isVisible() )
+            return false;
+        parentShape = parentShape->parent();
+    }
+    return true;
 }
 
 void KoShape::setPrintable(bool on)
 {
     d->printable = on;
 }
-    
+
 bool KoShape::isPrintable() const
 {
     if (d->visible)

libs/flake/KoShape.h

@@ -351,9 +351,10 @@ public:
      * Returns current visibility state of this shape.
      * Being visible means being painted, as well as being used for
      *   things like guidelines or searches.
+     * @param recursive when true, checks visibility recursively
      * @return current visibility state of this shape.
      */
-    bool isVisible() const;
+    bool isVisible( bool recursive = false ) const;
 
     /**
      * Changes the shape to be printable or not. The default is true.