// 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
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
#ifdef __GNUG__
-#pragma implementation "region.h"
+ #pragma implementation "region.h"
#endif
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
#include "wx/region.h"
#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
-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+#include "wx/log.h"
-class wxRegionRefData: public wxObjectRefData
+// ----------------------------------------------------------------------------
+// wxRegionRefData: private class containing the information about the region
+// ----------------------------------------------------------------------------
+
+class wxRegionRefData : public wxObjectRefData
{
public:
wxRegionRefData();
- ~wxRegionRefData();
+ wxRegionRefData(const wxRegionRefData& refData);
+ virtual ~wxRegionRefData();
GdkRegion *m_region;
#if OLDCODE
#endif
};
+// ----------------------------------------------------------------------------
+// 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;
}
+wxRegionRefData::wxRegionRefData(const wxRegionRefData& refData)
+{
+#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 );
#endif
}
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxRegion construction
+// ----------------------------------------------------------------------------
#define M_REGIONDATA ((wxRegionRefData *)m_refData)
-IMPLEMENT_DYNAMIC_CLASS(wxRegion,wxGDIObject);
+wxRegion::wxRegion()
+{
+}
wxRegion::wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
{
#endif
}
-wxRegion::wxRegion()
+wxRegion::~wxRegion()
{
}
-wxRegion::~wxRegion()
+bool wxRegion::operator==( const wxRegion& region )
{
+ // 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);
}
-bool wxRegion::operator == ( const wxRegion& region )
+bool wxRegion::operator != ( const wxRegion& region )
{
- return m_refData == region.m_refData;
+ return !(*this == region);
}
-bool wxRegion::operator != ( const wxRegion& region )
+void wxRegion::Unshare()
{
- return m_refData != region.m_refData;
+ 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
}
+// ----------------------------------------------------------------------------
+// wxRegion operations
+// ----------------------------------------------------------------------------
+
void wxRegion::Clear()
{
UnRef();
}
else
{
+ Unshare();
+
#ifdef __WXGTK20__
gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
#else
M_REGIONDATA->m_region = reg;
#endif
}
-
+
#if OLDCODE
M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,width,height) );
#endif
if (region.IsNull())
return FALSE;
- if (!m_refData)
- {
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
- }
+ Unshare();
#ifdef __WXGTK20__
gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
- if (!m_refData)
- {
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
- }
-
wxRegion reg( x, y, width, height );
- Intersect( reg );
- return TRUE;
+
+ return Intersect( reg );
}
bool wxRegion::Intersect( const wxRect& rect )
{
- if (!m_refData)
- {
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
- }
-
wxRegion reg( rect );
- Intersect( reg );
- return TRUE;
+ return Intersect( reg );
}
-bool wxRegion::Intersect( const wxRegion& region )
+// 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)
{
- if (region.IsNull())
- return FALSE;
+ Unshare();
- if (!m_refData)
- {
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
- return TRUE;
- }
-
#ifdef __WXGTK20__
gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
#else
gdk_region_destroy( M_REGIONDATA->m_region );
M_REGIONDATA->m_region = reg;
#endif
+
return TRUE;
}
-bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
+bool wxRegion::Intersect( const wxRegion& region )
{
+ if (region.IsNull())
+ return FALSE;
+
if (!m_refData)
{
m_refData = new wxRegionRefData();
M_REGIONDATA->m_region = gdk_region_new();
+ return TRUE;
}
- wxRegion reg( x, y, width, height );
- Subtract( reg );
+ 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( const wxRect& rect )
+bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
- if (!m_refData)
- {
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
- }
+ wxRegion reg( x, y, width, height );
+ return Subtract( reg );
+}
+bool wxRegion::Subtract( const wxRect& rect )
+{
wxRegion reg( rect );
- Subtract( reg );
- return TRUE;
+ return Subtract( reg );
}
bool wxRegion::Subtract( const wxRegion& region )
M_REGIONDATA->m_region = gdk_region_new();
}
+ Unshare();
+
#ifdef __WXGTK20__
gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
#else
gdk_region_destroy( M_REGIONDATA->m_region );
M_REGIONDATA->m_region = reg;
#endif
+
return TRUE;
}
bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
- if (!m_refData)
- {
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
- }
-
wxRegion reg( x, y, width, height );
- Xor( reg );
- return TRUE;
+ return Xor( reg );
}
bool wxRegion::Xor( const wxRect& rect )
{
- if (!m_refData)
- {
- m_refData = new wxRegionRefData();
- M_REGIONDATA->m_region = gdk_region_new();
- }
-
wxRegion reg( rect );
- Xor( reg );
- return TRUE;
+ return Xor( reg );
}
bool wxRegion::Xor( const wxRegion& region )
m_refData = new wxRegionRefData();
M_REGIONDATA->m_region = gdk_region_new();
}
+ else
+ {
+ Unshare();
+ }
#ifdef __WXGTK20__
gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
return TRUE;
}
+// ----------------------------------------------------------------------------
+// wxRegion tests
+// ----------------------------------------------------------------------------
+
void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
{
- x = 0;
- y = 0;
- w = -1;
- h = -1;
- if (!m_refData)
- return;
-
- GdkRectangle rect;
- gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
- x = rect.x;
- y = rect.y;
- w = rect.width;
- h = rect.height;
+ if ( m_refData )
+ {
+ GdkRectangle rect;
+ gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
+ x = rect.x;
+ y = rect.y;
+ w = rect.width;
+ h = rect.height;
+ }
+ else
+ {
+ x = 0;
+ y = 0;
+ w = -1;
+ h = -1;
+ }
}
wxRect wxRegion::GetBox() const
{
- wxCoord x = 0;
- wxCoord y = 0;
- wxCoord w = -1;
- wxCoord h = -1;
+ wxCoord x, y, w, h;
GetBox( x, y, w, h );
return wxRect( x, y, w, h );
}
#endif
}
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
// wxRegionIterator
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
#if OLDCODE
-IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
-
wxRegionIterator::wxRegionIterator()
{
Reset();
struct _XBox {
short x1, x2, y1, y2;
};
-
+
struct _XRegion {
long size , numRects;
_XBox *rects, extents;
}
}
-IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
-
wxRegionIterator::wxRegionIterator()
{
m_refData = new wxRIRefData();
return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
}
+wxRect wxRegionIterator::GetRect() const
+{
+ wxRect r;
+ wxNode *node = m_region.GetRectList()->Nth( m_current );
+
+ if (node)
+ r = *((wxRect*)node->Data());
+
+ return r;
+}
+
#endif
projects / wxWidgets.git / blobdiff