X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f96aa4d9eb296b3dfc468a351ce013bf92fab983..63166611fb485936c4f320bad2d7b2df58c37616:/src/gtk1/region.cpp

diff --git a/src/gtk1/region.cpp b/src/gtk1/region.cpp
index 5e199e76a0..2c31667721 100644
--- a/src/gtk1/region.cpp
+++ b/src/gtk1/region.cpp
@@ -1,421 +1,776 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        region.cpp
+// Name:        gtk/region.cpp
 // Purpose:
 // Author:      Robert Roebling
+// Modified:    VZ at 05.10.00: use Unshare(), comparison fixed
 // Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling
-// Licence:   	wxWindows licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
+// ============================================================================
+// declarations
+// ============================================================================
 
 #ifdef __GNUG__
-#pragma implementation "region.h"
+    #pragma implementation "region.h"
 #endif
 
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
 #include "wx/region.h"
 
-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
+// Unfortunately the new way of implementing the region iterator
+// doesn't work with GTK+ 2.0 or above (can't access a Region in
+// GdkPrivateRegion)
+#ifdef __WXGTK20__
+#define OLDCODE 1
+#else
+#define OLDCODE 0
+#endif
+
+#include "wx/log.h"
 
-class wxRegionRefData: public wxObjectRefData
+// ----------------------------------------------------------------------------
+// wxRegionRefData: private class containing the information about the region
+// ----------------------------------------------------------------------------
+
+class wxRegionRefData : public wxObjectRefData
 {
-  public:
-  
-    wxRegionRefData(void);
-    ~wxRegionRefData(void);
-  
-  public:    
+public:
+    wxRegionRefData();
+    wxRegionRefData(const wxRegionRefData& refData);
+    virtual ~wxRegionRefData();
 
     GdkRegion  *m_region;
+#if OLDCODE
     wxList      m_rects;
+#endif
 };
 
-wxRegionRefData::wxRegionRefData(void)
+// ----------------------------------------------------------------------------
+// macros
+// ----------------------------------------------------------------------------
+
+#define M_REGIONDATA ((wxRegionRefData *)m_refData)
+#define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))
+
+IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject);
+IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxRegionRefData
+// ----------------------------------------------------------------------------
+
+wxRegionRefData::wxRegionRefData()
 {
-  m_region = (GdkRegion *) NULL;
+    m_region = (GdkRegion *) NULL;
 }
 
-wxRegionRefData::~wxRegionRefData(void)
+wxRegionRefData::wxRegionRefData(const wxRegionRefData& refData)
 {
-  if (m_region) gdk_region_destroy( m_region );
-  
-  wxNode *node = m_rects.First();
-  while (node)
-  {
-    wxRect *r = (wxRect*)node->Data();
-    delete r;
-    node = node->Next();
-  }
+#ifdef __WXGTK20__
+    m_region = gdk_region_copy(refData.m_region);
+#else
+    m_region = gdk_region_new();
+    GdkRegion *regCopy = gdk_regions_union(m_region, refData.m_region);
+    gdk_region_destroy(m_region);
+    m_region = regCopy;
+#endif
+
+#if OLDCODE
+    wxNode *node = refData.m_rects.First();
+    while (node)
+    {
+        wxRect *r = (wxRect*)node->Data();
+        m_rects.Append( (wxObject*) new wxRect(*r) );
+        node = node->Next();
+    }
+#endif
+}
+
+wxRegionRefData::~wxRegionRefData()
+{
+    if (m_region) gdk_region_destroy( m_region );
+
+#if OLDCODE
+    wxNode *node = m_rects.First();
+    while (node)
+    {
+        wxRect *r = (wxRect*)node->Data();
+        delete r;
+        node = node->Next();
+    }
+#endif
 }
 
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxRegion construction
+// ----------------------------------------------------------------------------
 
 #define M_REGIONDATA ((wxRegionRefData *)m_refData)
 
-IMPLEMENT_DYNAMIC_CLASS(wxRegion,wxGDIObject);
-  
-wxRegion::wxRegion( long x, long y, long w, long h )
+wxRegion::wxRegion()
 {
-  m_refData = new wxRegionRefData();
-  GdkRegion *reg = gdk_region_new();
-  GdkRectangle rect;
-  rect.x = x;
-  rect.y = y;
-  rect.width = w;
-  rect.height = h;
-  M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
-  gdk_region_destroy( reg );
-  M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,w,h) );
+}
+
+wxRegion::wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
+{
+    m_refData = new wxRegionRefData();
+    GdkRegion *reg = gdk_region_new();
+    GdkRectangle rect;
+    rect.x = x;
+    rect.y = y;
+    rect.width = w;
+    rect.height = h;
+#ifdef __WXGTK20__
+    gdk_region_union_with_rect( reg, &rect );
+    M_REGIONDATA->m_region = reg;
+#else
+    M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
+    gdk_region_destroy( reg );
+#endif
+#if OLDCODE
+    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,w,h) );
+#endif
 }
 
 wxRegion::wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
 {
-  m_refData = new wxRegionRefData();
-  GdkRegion *reg = gdk_region_new();
-  GdkRectangle rect;
-  rect.x = topLeft.x;
-  rect.y = topLeft.y;
-  rect.width = bottomRight.x - rect.x;
-  rect.height = bottomRight.y - rect.y;
-  M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
-  gdk_region_destroy( reg );
-  M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(topLeft,bottomRight) );
+    m_refData = new wxRegionRefData();
+    GdkRegion *reg = gdk_region_new();
+    GdkRectangle rect;
+    rect.x = topLeft.x;
+    rect.y = topLeft.y;
+    rect.width = bottomRight.x - rect.x;
+    rect.height = bottomRight.y - rect.y;
+#ifdef __WXGTK20__
+    gdk_region_union_with_rect( reg, &rect );
+    M_REGIONDATA->m_region = reg;
+#else
+    M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
+    gdk_region_destroy( reg );
+#endif
+#if OLDCODE
+    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(topLeft,bottomRight) );
+#endif
 }
 
 wxRegion::wxRegion( const wxRect& rect )
 {
-  m_refData = new wxRegionRefData();
-  GdkRegion *reg = gdk_region_new();
-  GdkRectangle g_rect;
-  g_rect.x = rect.x;
-  g_rect.y = rect.y;
-  g_rect.width = rect.width;
-  g_rect.height = rect.height;
-  M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &g_rect );
-  gdk_region_destroy( reg );
-  
-  wxNode *node = M_REGIONDATA->m_rects.First();
-  while (node)
-  {
-    wxRect *r = (wxRect*)node->Data();
-    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
-    node = node->Next();
-  }
+    m_refData = new wxRegionRefData();
+    GdkRegion *reg = gdk_region_new();
+    GdkRectangle g_rect;
+    g_rect.x = rect.x;
+    g_rect.y = rect.y;
+    g_rect.width = rect.width;
+    g_rect.height = rect.height;
+#ifdef __WXGTK20__
+    gdk_region_union_with_rect( reg, &g_rect );
+    M_REGIONDATA->m_region = reg;
+#else
+    M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &g_rect );
+    gdk_region_destroy( reg );
+#endif
+#if OLDCODE
+    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(rect.x,rect.y,rect.width,rect.height) );
+#endif
+}
+
+wxRegion::~wxRegion()
+{
 }
 
-wxRegion::wxRegion(void)
+bool wxRegion::operator==( const wxRegion& region )
 {
-  m_refData = new wxRegionRefData();
-  M_REGIONDATA->m_region = gdk_region_new();
+    // VZ: compare the regions themselves, not the pointers to ref data!
+    return gdk_region_equal(M_REGIONDATA->m_region,
+                            M_REGIONDATA_OF(region)->m_region);
 }
 
-wxRegion::~wxRegion(void)
+bool wxRegion::operator != ( const wxRegion& region )
 {
+    return !(*this == region);
 }
 
-void wxRegion::Clear(void)
+void wxRegion::Unshare()
 {
-  UnRef();
-  m_refData = new wxRegionRefData();
-  M_REGIONDATA->m_region = gdk_region_new();
+    if ( !m_refData )
+    {
+        m_refData = new wxRegionRefData;
+        M_REGIONDATA->m_region = gdk_region_new();
+    }
+    else if ( m_refData->GetRefCount() > 1 )
+    {
+        wxRegionRefData *refData = new wxRegionRefData(*M_REGIONDATA);
+        UnRef();
+        m_refData = refData;
+    }
+    //else: we're not shared
 }
 
-bool wxRegion::Union( long x, long y, long width, long height )
+// ----------------------------------------------------------------------------
+// wxRegion operations
+// ----------------------------------------------------------------------------
+
+void wxRegion::Clear()
 {
-  GdkRectangle rect;
-  rect.x = x;
-  rect.y = y;
-  rect.width = width;
-  rect.height = height;
-  GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
-  gdk_region_destroy( M_REGIONDATA->m_region );
-  M_REGIONDATA->m_region = reg;
-  M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,width,height) );
-  return TRUE;
+    UnRef();
+}
+
+bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
+{
+    GdkRectangle rect;
+    rect.x = x;
+    rect.y = y;
+    rect.width = width;
+    rect.height = height;
+    if (!m_refData)
+    {
+        m_refData = new wxRegionRefData();
+        GdkRegion *reg = gdk_region_new();
+#ifdef __WXGTK20__
+        gdk_region_union_with_rect( reg, &rect );
+        M_REGIONDATA->m_region = reg;
+#else
+        M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
+        gdk_region_destroy( reg );
+#endif
+    }
+    else
+    {
+        Unshare();
+
+#ifdef __WXGTK20__
+        gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
+#else
+        GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
+        gdk_region_destroy( M_REGIONDATA->m_region );
+        M_REGIONDATA->m_region = reg;
+#endif
+    }
+
+#if OLDCODE
+    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,width,height) );
+#endif
+
+    return TRUE;
 }
 
 bool wxRegion::Union( const wxRect& rect )
 {
-  GdkRectangle g_rect;
-  g_rect.x = rect.x;
-  g_rect.y = rect.y;
-  g_rect.width = rect.width;
-  g_rect.height = rect.height;
-  GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &g_rect );
-  gdk_region_destroy( M_REGIONDATA->m_region );
-  M_REGIONDATA->m_region = reg;
-  M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(rect.x,rect.y,rect.width,rect.height) );
-  return TRUE;
+    return Union( rect.x, rect.y, rect.width, rect.height );
 }
 
 bool wxRegion::Union( const wxRegion& region )
 {
-  GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
-  gdk_region_destroy( M_REGIONDATA->m_region );
-  M_REGIONDATA->m_region = reg;
-  
-  wxNode *node = region.GetRectList()->First();
-  while (node)
-  {
-    wxRect *r = (wxRect*)node->Data();
-    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
-    node = node->Next();
-  }
-  
-  return TRUE;
+    if (region.IsNull())
+        return FALSE;
+
+    Unshare();
+
+#ifdef __WXGTK20__
+    gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
+#else
+    GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
+    gdk_region_destroy( M_REGIONDATA->m_region );
+    M_REGIONDATA->m_region = reg;
+#endif
+
+#if OLDCODE
+    wxNode *node = region.GetRectList()->First();
+    while (node)
+    {
+        wxRect *r = (wxRect*)node->Data();
+        M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
+        node = node->Next();
+    }
+#endif
+
+    return TRUE;
 }
 
-bool wxRegion::Intersect( long x, long y, long width, long height )
+bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 {
-  wxRegion reg( x, y, width, height );
-  Intersect( reg );
-  return TRUE;
+    wxRegion reg( x, y, width, height );
+
+    return Intersect( reg );
 }
 
 bool wxRegion::Intersect( const wxRect& rect )
 {
-  wxRegion reg( rect );
-  Intersect( reg );
-  return TRUE;
+    wxRegion reg( rect );
+    return Intersect( reg );
+}
+
+// this helper function just computes the region intersection without updating
+// the list of rectangles each region maintaints: this allows us to call it
+// from Intersect() itself without going into infinite recursion as we would
+// if we called Intersect() itself recursively
+bool wxRegion::IntersectRegionOnly(const wxRegion& region)
+{
+    Unshare();
+
+#ifdef __WXGTK20__
+    gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
+#else
+    GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
+    gdk_region_destroy( M_REGIONDATA->m_region );
+    M_REGIONDATA->m_region = reg;
+#endif
+
+    return TRUE;
 }
 
 bool wxRegion::Intersect( const wxRegion& region )
 {
-  GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
-  gdk_region_destroy( M_REGIONDATA->m_region );
-  M_REGIONDATA->m_region = reg;
-  return TRUE;
+    if (region.IsNull())
+        return FALSE;
+
+    if (!m_refData)
+    {
+        m_refData = new wxRegionRefData();
+        M_REGIONDATA->m_region = gdk_region_new();
+        return TRUE;
+    }
+
+    if ( !IntersectRegionOnly(region) )
+    {
+        GetRectList()->Clear();
+
+        return FALSE;
+    }
+
+    // we need to update the rect list as well
+#if OLDCODE
+    wxList& list = *GetRectList();
+    wxNode *node = list.First();
+    while (node)
+    {
+        wxRect *r = (wxRect*)node->Data();
+
+        wxRegion regCopy = region;
+        if ( regCopy.IntersectRegionOnly(*r) )
+        {
+            // replace the node with the intersection
+            *r = regCopy.GetBox();
+        }
+        else
+        {
+            // TODO remove the rect from the list
+            r->width = 0;
+            r->height = 0;
+        }
+
+        node = node->Next();
+    }
+#endif
+    return TRUE;
 }
 
-bool wxRegion::Subtract( long x, long y, long width, long height )
+bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 {
-  wxRegion reg( x, y, width, height );
-  Subtract( reg );
-  return TRUE;
+    wxRegion reg( x, y, width, height );
+    return Subtract( reg );
 }
 
 bool wxRegion::Subtract( const wxRect& rect )
 {
-  wxRegion reg( rect );
-  Subtract( reg );
-  return TRUE;
+    wxRegion reg( rect );
+    return Subtract( reg );
 }
 
 bool wxRegion::Subtract( const wxRegion& region )
 {
-  GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
-  gdk_region_destroy( M_REGIONDATA->m_region );
-  M_REGIONDATA->m_region = reg;
-  return TRUE;
+    if (region.IsNull())
+        return FALSE;
+
+    if (!m_refData)
+    {
+        m_refData = new wxRegionRefData();
+        M_REGIONDATA->m_region = gdk_region_new();
+    }
+
+    Unshare();
+
+#ifdef __WXGTK20__
+    gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
+#else
+    GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
+    gdk_region_destroy( M_REGIONDATA->m_region );
+    M_REGIONDATA->m_region = reg;
+#endif
+
+    return TRUE;
 }
 
-bool wxRegion::Xor( long x, long y, long width, long height )
+bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 {
-  wxRegion reg( x, y, width, height );
-  Xor( reg );
-  return TRUE;
+    wxRegion reg( x, y, width, height );
+    return Xor( reg );
 }
 
 bool wxRegion::Xor( const wxRect& rect )
 {
-  wxRegion reg( rect );
-  Xor( reg );
-  return TRUE;
+    wxRegion reg( rect );
+    return Xor( reg );
 }
 
 bool wxRegion::Xor( const wxRegion& region )
 {
-  GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
-  gdk_region_destroy( M_REGIONDATA->m_region );
-  M_REGIONDATA->m_region = reg;
-  
-  wxNode *node = region.GetRectList()->First();
-  while (node)
-  {
-    wxRect *r = (wxRect*)node->Data();
-    M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
-    node = node->Next();
-  }
-  
-  return TRUE;
+    if (region.IsNull())
+        return FALSE;
+
+    if (!m_refData)
+    {
+        m_refData = new wxRegionRefData();
+        M_REGIONDATA->m_region = gdk_region_new();
+    }
+    else
+    {
+        Unshare();
+    }
+
+#ifdef __WXGTK20__
+    gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
+#else
+    GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
+    gdk_region_destroy( M_REGIONDATA->m_region );
+    M_REGIONDATA->m_region = reg;
+#endif
+
+#if OLDCODE
+    wxNode *node = region.GetRectList()->First();
+    while (node)
+    {
+        wxRect *r = (wxRect*)node->Data();
+        M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
+        node = node->Next();
+    }
+#endif
+
+    return TRUE;
 }
 
-void wxRegion::GetBox( long& x, long& y, long&w, long &h ) const
+// ----------------------------------------------------------------------------
+// wxRegion tests
+// ----------------------------------------------------------------------------
+
+void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
 {
-  x = 0;
-  y = 0;
-  w = -1;
-  h = -1;
-  wxNode *node = GetRectList()->First();
-  while (node)
-  {
-    wxRect *r = (wxRect*)node->Data();
-    if (node == GetRectList()->First())
+    if ( m_refData )
     {
-      x = r->x;
-      y = r->y;
-      w = r->width;
-      h = r->height;
+        GdkRectangle rect;
+        gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
+        x = rect.x;
+        y = rect.y;
+        w = rect.width;
+        h = rect.height;
     }
     else
     {
-      if (r->x < x)
-      {
-        x = r->x;
-        w += x - r->x;
-      }
-      if (r->y < y) 
-      {
-        y = r->y;
-        h += y - r->y;
-      }
-      if (r->width+r->x > x+w) 
-      {
-        w = r->x + r->width - x;
-      }
-      if (r->height+r->y > y+h) 
-      {
-        h = r->y + r->height - y;
-      }
+        x = 0;
+        y = 0;
+        w = -1;
+        h = -1;
     }
-    node = node->Next();
-  }
 }
 
-wxRect wxRegion::GetBox(void) const
+wxRect wxRegion::GetBox() const
 {
-  long x = 0;
-  long y = 0;
-  long w = -1;
-  long h = -1;
-  GetBox( x, y, w, h );
-  return wxRect( x, y, w, h );
+    wxCoord x, y, w, h;
+    GetBox( x, y, w, h );
+    return wxRect( x, y, w, h );
 }
 
-bool wxRegion::Empty(void) const
+bool wxRegion::Empty() const
 {
-  return gdk_region_empty( M_REGIONDATA->m_region );
+    if (!m_refData)
+        return TRUE;
+
+    return gdk_region_empty( M_REGIONDATA->m_region );
 }
 
-wxRegionContain wxRegion::Contains( long x, long y ) const
+wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
 {
-  if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
-    return wxInRegion;
-  else
-    return wxOutRegion;
+    if (!m_refData)
+        return wxOutRegion;
+
+    if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
+        return wxInRegion;
+    else
+        return wxOutRegion;
 }
 
-wxRegionContain wxRegion::Contains( long x, long y, long w, long h ) const
+wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
 {
-  GdkRectangle rect;
-  rect.x = x;
-  rect.y = y;
-  rect.width = w;
-  rect.height = h;
-  GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
-  switch (res)
-  {
-   case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
-   case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
-   case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
-  }
-  return wxOutRegion;
+    if (!m_refData)
+        return wxOutRegion;
+
+    GdkRectangle rect;
+    rect.x = x;
+    rect.y = y;
+    rect.width = w;
+    rect.height = h;
+    GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
+    switch (res)
+    {
+        case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
+        case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
+        case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
+    }
+    return wxOutRegion;
 }
 
 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 {
-  return Contains( pt.x, pt.y );
+    return Contains( pt.x, pt.y );
 }
 
 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 {
-  return Contains( rect.x, rect.y, rect.width, rect.height );
+    return Contains( rect.x, rect.y, rect.width, rect.height );
 }
 
-GdkRegion *wxRegion::GetRegion(void) const
+GdkRegion *wxRegion::GetRegion() const
 {
-  return M_REGIONDATA->m_region;
+    if (!m_refData)
+        return (GdkRegion*) NULL;
+
+    return M_REGIONDATA->m_region;
 }
 
 wxList *wxRegion::GetRectList() const
 {
-  return &(M_REGIONDATA->m_rects);
+#if OLDCODE
+    if (!m_refData)
+        return (wxList*) NULL;
+
+    return &(M_REGIONDATA->m_rects);
+#else
+    return (wxList*) NULL;
+#endif
 }
 
-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxRegionIterator
+// ----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
-  
-wxRegionIterator::wxRegionIterator(void)
+#if OLDCODE
+
+wxRegionIterator::wxRegionIterator()
+{
+    Reset();
+}
+
+wxRegionIterator::wxRegionIterator( const wxRegion& region )
+{
+    Reset(region);
+}
+
+void wxRegionIterator::Reset( const wxRegion& region )
+{
+    m_region = region;
+    Reset();
+}
+
+wxRegionIterator::operator bool () const
+{
+    return m_region.GetRectList() && m_current < (size_t)m_region.GetRectList()->Number();
+}
+
+bool wxRegionIterator::HaveRects() const
+{
+    return m_region.GetRectList() && m_current < (size_t)m_region.GetRectList()->Number();
+}
+
+void wxRegionIterator::operator ++ ()
+{
+    if (HaveRects()) ++m_current;
+}
+
+void wxRegionIterator::operator ++ (int)
+{
+    if (HaveRects()) ++m_current;
+}
+
+wxCoord wxRegionIterator::GetX() const
+{
+    wxNode *node = m_region.GetRectList()->Nth( m_current );
+    if (!node) return 0;
+    wxRect *r = (wxRect*)node->Data();
+    return r->x;
+}
+
+wxCoord wxRegionIterator::GetY() const
+{
+    wxNode *node = m_region.GetRectList()->Nth( m_current );
+    if (!node) return 0;
+    wxRect *r = (wxRect*)node->Data();
+    return r->y;
+}
+
+wxCoord wxRegionIterator::GetW() const
+{
+    wxNode *node = m_region.GetRectList()->Nth( m_current );
+    if (!node) return 0;
+    wxRect *r = (wxRect*)node->Data();
+    return r->width;
+}
+
+wxCoord wxRegionIterator::GetH() const
 {
-  m_current = 0;
+    wxNode *node = m_region.GetRectList()->Nth( m_current );
+    if (!node) return 0;
+    wxRect *r = (wxRect*)node->Data();
+    return r->height;
+}
+
+#else
+
+// the following structures must match the private structures
+// in X11 region code ( xc/lib/X11/region.h )
+
+// this makes the Region type transparent
+// and we have access to the region rectangles
+
+struct _XBox {
+    short x1, x2, y1, y2;
+};
+
+struct _XRegion {
+    long   size , numRects;
+    _XBox *rects, extents;
+};
+
+class wxRIRefData: public wxObjectRefData
+{
+public:
+
+    wxRIRefData() : m_rects(0), m_numRects(0){}
+   ~wxRIRefData();
+
+    wxRect *m_rects;
+    size_t  m_numRects;
+
+    void CreateRects( const wxRegion& r );
+};
+
+wxRIRefData::~wxRIRefData()
+{
+    delete m_rects;
+}
+
+#include <gdk/gdkprivate.h>
+
+void wxRIRefData::CreateRects( const wxRegion& region )
+{
+  if( m_rects )
+    delete m_rects;
+  m_rects   = 0;
+  m_numRects= 0;
+  GdkRegion *gdkregion= region.GetRegion();
+  if( gdkregion ){
+    Region r= ((GdkRegionPrivate *)gdkregion)->xregion;
+    if( r ){
+      m_numRects= r->numRects;
+      if( m_numRects )
+      {
+        m_rects= new wxRect[m_numRects];
+        for( size_t i=0; i<m_numRects; ++i )
+        {
+          _XBox &xr= r->rects[i];
+          wxRect&wr= m_rects[i];
+          wr.x     = xr.x1;
+          wr.y     = xr.y1;
+          wr.width = xr.x2-xr.x1;
+          wr.height= xr.y2-xr.y1;
+        }
+      }
+    }
+  }
+}
+
+wxRegionIterator::wxRegionIterator()
+{
+    m_refData = new wxRIRefData();
+    Reset();
 }
 
 wxRegionIterator::wxRegionIterator( const wxRegion& region )
 {
-  m_region = region;
-  m_current = 0;
+    m_refData = new wxRIRefData();
+    Reset(region);
 }
 
 void wxRegionIterator::Reset( const wxRegion& region )
 {
-  m_region = region;
-  m_current = 0;
+    m_region = region;
+    ((wxRIRefData*)m_refData)->CreateRects(region);
+    Reset();
 }
 
-wxRegionIterator::operator bool (void) const 
-{ 
-  return m_current < m_region.GetRectList()->Number(); 
+bool wxRegionIterator::HaveRects() const
+{
+    return m_current < ((wxRIRefData*)m_refData)->m_numRects;
 }
 
-bool wxRegionIterator::HaveRects(void) const 
-{ 
-  return m_current < m_region.GetRectList()->Number(); 
+wxRegionIterator::operator bool () const
+{
+    return HaveRects();
 }
 
-void wxRegionIterator::operator ++ (void)
+void wxRegionIterator::operator ++ ()
 {
-  if (m_current < m_region.GetRectList()->Number()) ++m_current;
+    if (HaveRects()) ++m_current;
 }
 
 void wxRegionIterator::operator ++ (int)
 {
-  if (m_current < m_region.GetRectList()->Number()) ++m_current;
+    if (HaveRects()) ++m_current;
+}
+
+wxCoord wxRegionIterator::GetX() const
+{
+    if( !HaveRects() ) return 0;
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
 }
 
-long wxRegionIterator::GetX(void) const
+wxCoord wxRegionIterator::GetY() const
 {
-  wxNode *node = m_region.GetRectList()->Nth( m_current );
-  if (!node) return 0;
-  wxRect *r = (wxRect*)node->Data();
-  return r->x;
+    if( !HaveRects() ) return 0;
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
 }
 
-long wxRegionIterator::GetY(void) const
+wxCoord wxRegionIterator::GetW() const
 {
-  wxNode *node = m_region.GetRectList()->Nth( m_current );
-  if (!node) return 0;
-  wxRect *r = (wxRect*)node->Data();
-  return r->y;
+    if( !HaveRects() ) return -1;
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
 }
 
-long wxRegionIterator::GetW(void) const
+wxCoord wxRegionIterator::GetH() const
 {
-  wxNode *node = m_region.GetRectList()->Nth( m_current );
-  if (!node) return 0;
-  wxRect *r = (wxRect*)node->Data();
-  return r->width;
+    if( !HaveRects() ) return -1;
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
 }
 
-long wxRegionIterator::GetH(void) const
+wxRect wxRegionIterator::GetRect() const
 {
-  wxNode *node = m_region.GetRectList()->Nth( m_current );
-  if (!node) return 0;
-  wxRect *r = (wxRect*)node->Data();
-  return r->height;
+    wxRect r;
+    if( HaveRects() )
+        r = ((wxRIRefData*)m_refData)->m_rects[m_current];
+
+    return r;
 }
 
+#endif