src/layoutinformation.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * layoutinformation.cpp
   4  *
   5  * Copyright 2007 Novell, Inc. (http://www.novell.com)
   6  *
   7  * See the LICENSE file included with the distribution for details.
   8  *
   9  */
  10 #include "frameworkelement.h"
  11 #include "geometry.h"
  12 #include "rect.h"
  13 #include "point.h"
  14
  15 Geometry *
  16 LayoutInformation::GetClip (FrameworkElement *item)
  17 {
  18         FrameworkElement *element = item;
  19         Point offset = Point (0,0);
  20         Rect composite (0,0,INFINITY, INFINITY);
  21
  22         do {
  23                 Geometry *clip = GetLayoutClip (element);
  24
  25                 if (clip && clip->Is (Type::RECTANGLEGEOMETRY)) {
  26                         Rect relative = *((RectangleGeometry *)clip)->GetRect ();
  27                         relative.x -= offset.x;
  28                         relative.y -= offset.y;
  29
  30                         composite = composite.Intersection (relative);
  31                 }
  32
  33                 Point *local_offset = GetVisualOffset (element);
  34                 if (local_offset) {
  35                         offset.x += local_offset->x;
  36                         offset.y += local_offset->y;
  37                 }
  38         } while ((element = (FrameworkElement *)element->GetVisualParent ()));
  39
  40         if (isinf (composite.width) || isinf (composite.height))
  41                 return NULL;
  42
  43         RectangleGeometry *geom = new RectangleGeometry ();
  44         geom->SetRect (&composite);
  45
  46         return geom;
  47 }