X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ff7b1510ea7f7855091df83d75a44415dc1cba18..f8bcb37d996a475f39de36230770a808827e2a0f:/src/gtk1/region.cpp

diff --git a/src/gtk1/region.cpp b/src/gtk1/region.cpp
index 6cea744fa8..acad6e5f64 100644
--- a/src/gtk1/region.cpp
+++ b/src/gtk1/region.cpp
@@ -1,253 +1,508 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        region.cpp
+// Name:        src/gtk1/region.cpp
 // Purpose:
 // Author:      Robert Roebling
-// Created:     01/02/98
-// Id:
-// Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
-// Licence:   	wxWindows licence
+// Modified:    VZ at 05.10.00: use AllocExclusive(), comparison fixed
+// Id:          $Id$
+// Copyright:   (c) 1998 Robert Roebling
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
+// ============================================================================
+// declarations
+// ============================================================================
 
-#ifdef __GNUG__
-#pragma implementation "region.h"
-#endif
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
 
 #include "wx/region.h"
 
-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+#ifndef WX_PRECOMP
+    #include "wx/log.h"
+#endif
+
+#include "wx/gtk1/private.h"
+
+
+// ----------------------------------------------------------------------------
+// wxGdkRegion: creates a new region in ctor and destroys in dtor
+// ----------------------------------------------------------------------------
 
-class wxRegionRefData: public wxObjectRefData
+class wxGdkRegion
 {
-  public:
-  
-    wxRegionRefData(void);
-    ~wxRegionRefData(void);
-  
-  public:    
+public:
+    wxGdkRegion() { m_region = gdk_region_new(); }
+    ~wxGdkRegion() { gdk_region_destroy(m_region); }
+
+    operator GdkRegion *() const { return m_region; }
+
+private:
+    GdkRegion *m_region;
+};
+
+
+// ----------------------------------------------------------------------------
+// wxRegionRefData: private class containing the information about the region
+// ----------------------------------------------------------------------------
+
+class wxRegionRefData : public wxObjectRefData
+{
+public:
+    wxRegionRefData()
+    {
+        m_region = NULL;
+    }
+
+    wxRegionRefData(const wxRegionRefData& refData)
+        : wxObjectRefData()
+    {
+        m_region = gdk_regions_union(wxGdkRegion(), refData.m_region);
+    }
+
+    virtual ~wxRegionRefData()
+    {
+        if (m_region)
+            gdk_region_destroy( m_region );
+    }
 
     GdkRegion  *m_region;
 };
 
-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)
+
+// ----------------------------------------------------------------------------
+// wxRegion construction
+// ----------------------------------------------------------------------------
+
+#define M_REGIONDATA ((wxRegionRefData *)m_refData)
+
+void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 {
-  m_region = NULL;
+    GdkRectangle rect;
+    rect.x = x;
+    rect.y = y;
+    rect.width = w;
+    rect.height = h;
+
+    m_refData = new wxRegionRefData();
+
+    M_REGIONDATA->m_region = gdk_region_union_with_rect( wxGdkRegion(), &rect );
 }
 
-wxRegionRefData::~wxRegionRefData(void)
+wxRegion::wxRegion( GdkRegion *region )
 {
-  if (m_region) gdk_region_destroy( m_region );
+    m_refData = new wxRegionRefData();
+    M_REGIONDATA->m_region = gdk_regions_union(wxGdkRegion(), region);
 }
 
-//-----------------------------------------------------------------------------
+wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
+{
+    GdkPoint *gdkpoints = new GdkPoint[n];
+    for ( size_t i = 0 ; i < n ; i++ )
+    {
+        gdkpoints[i].x = points[i].x;
+        gdkpoints[i].y = points[i].y;
+    }
+
+    m_refData = new wxRegionRefData();
+
+    GdkRegion* reg = gdk_region_polygon
+                     (
+                        gdkpoints,
+                        n,
+                        fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
+                                                    : GDK_EVEN_ODD_RULE
+                     );
+
+    M_REGIONDATA->m_region = reg;
+
+    delete [] gdkpoints;
+}
 
-#define M_REGIONDATA ((wxRegionRefData *)m_refData)
+wxRegion::~wxRegion()
+{
+    // m_refData unrefed in ~wxObject
+}
 
-IMPLEMENT_DYNAMIC_CLASS(wxRegion,wxGDIObject);
-  
-wxRegion::wxRegion( long x, long y, long w, long h )
+wxObjectRefData *wxRegion::CreateRefData() const
 {
-  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 );
+    return new wxRegionRefData;
 }
 
-wxRegion::wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
+wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const
 {
-  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 );
+    return new wxRegionRefData(*(wxRegionRefData *)data);
 }
 
-wxRegion::wxRegion( const wxRect& rect )
+// ----------------------------------------------------------------------------
+// wxRegion comparison
+// ----------------------------------------------------------------------------
+
+bool wxRegion::DoIsEqual(const wxRegion& region) const
 {
-  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 );
+    return gdk_region_equal(M_REGIONDATA->m_region,
+                            M_REGIONDATA_OF(region)->m_region);
 }
 
-wxRegion::wxRegion(void)
+// ----------------------------------------------------------------------------
+// wxRegion operations
+// ----------------------------------------------------------------------------
+
+void wxRegion::Clear()
 {
-  m_refData = new wxRegionRefData();
-  M_REGIONDATA->m_region = gdk_region_new();
+    UnRef();
 }
 
-wxRegion::~wxRegion(void)
+bool wxRegion::DoUnionWithRect(const wxRect& r)
 {
+    // workaround for a strange GTK/X11 bug: taking union with an empty
+    // rectangle results in an empty region which is definitely not what we
+    // want
+    if ( r.IsEmpty() )
+        return TRUE;
+
+    if ( !m_refData )
+    {
+        InitRect(r.x, r.y, r.width, r.height);
+    }
+    else
+    {
+        AllocExclusive();
+
+        GdkRectangle rect;
+        rect.x = r.x;
+        rect.y = r.y;
+        rect.width = r.width;
+        rect.height = r.height;
+
+        gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
+    }
+
+    return TRUE;
 }
 
-void wxRegion::Clear(void)
+bool wxRegion::DoUnionWithRegion( const wxRegion& region )
 {
-  UnRef();
-  m_refData = new wxRegionRefData();
-  M_REGIONDATA->m_region = gdk_region_new();
+    if (region.IsNull())
+        return FALSE;
+
+    if (!m_refData)
+    {
+        m_refData = new wxRegionRefData();
+        M_REGIONDATA->m_region = gdk_region_new();
+    }
+    else
+    {
+        AllocExclusive();
+    }
+
+    GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
+    gdk_region_destroy( M_REGIONDATA->m_region );
+    M_REGIONDATA->m_region = reg;
+
+    return TRUE;
 }
 
-bool wxRegion::Union( long x, long y, long width, long height )
+bool wxRegion::DoIntersect( const wxRegion& region )
 {
-  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;
-  return TRUE;
+    wxCHECK_MSG( region.Ok(), false, _T("invalid region") );
+
+    if (!m_refData)
+    {
+        // intersecting with invalid region doesn't make sense
+        return FALSE;
+    }
+
+    AllocExclusive();
+
+    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;
 }
 
-bool wxRegion::Union( const wxRect& rect )
+bool wxRegion::DoSubtract( const wxRegion& region )
 {
-  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;
-  return TRUE;
+    wxCHECK_MSG( region.Ok(), false, _T("invalid region") );
+
+    if (!m_refData)
+    {
+        // subtracting from an invalid region doesn't make sense
+        return FALSE;
+    }
+
+    AllocExclusive();
+
+    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;
 }
 
-bool wxRegion::Union( const wxRegion& region )
+bool wxRegion::DoXor( 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;
-  return TRUE;
+    wxCHECK_MSG( region.Ok(), false, _T("invalid region") );
+
+    if (!m_refData)
+    {
+        return FALSE;
+    }
+
+    AllocExclusive();
+
+    GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
+    gdk_region_destroy( M_REGIONDATA->m_region );
+    M_REGIONDATA->m_region = reg;
+
+    return TRUE;
 }
 
-bool wxRegion::Intersect( long x, long y, long width, long height )
+bool wxRegion::DoOffset( wxCoord x, wxCoord y )
 {
-  wxRegion reg( x, y, width, height );
-  Intersect( reg );
-  return TRUE;
+    if (!m_refData)
+        return FALSE;
+
+    AllocExclusive();
+
+    gdk_region_offset( M_REGIONDATA->m_region, x, y );
+
+    return TRUE;
 }
 
-bool wxRegion::Intersect( const wxRect& rect )
+// ----------------------------------------------------------------------------
+// wxRegion tests
+// ----------------------------------------------------------------------------
+
+bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
 {
-  wxRegion reg( rect );
-  Intersect( reg );
-  return TRUE;
+    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;
+
+        return true;
+    }
+    else
+    {
+        x = 0;
+        y = 0;
+        w = -1;
+        h = -1;
+
+        return false;
+    }
 }
 
-bool wxRegion::Intersect( const wxRegion& region )
+bool wxRegion::IsEmpty() const
 {
-  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 (!m_refData)
+        return TRUE;
+
+    return gdk_region_empty( M_REGIONDATA->m_region );
 }
 
-bool wxRegion::Subtract( long x, long y, long width, long height )
+wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const
 {
-  wxRegion reg( x, y, width, height );
-  Subtract( reg );
-  return TRUE;
+    if (!m_refData)
+        return wxOutRegion;
+
+    if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
+        return wxInRegion;
+    else
+        return wxOutRegion;
 }
 
-bool wxRegion::Subtract( const wxRect& rect )
+wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const
 {
-  wxRegion reg( rect );
-  Subtract( reg );
-  return TRUE;
+    if (!m_refData)
+        return wxOutRegion;
+
+    GdkRectangle rect;
+    rect.x = r.x;
+    rect.y = r.y;
+    rect.width = r.width;
+    rect.height = r.height;
+    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;
 }
 
-bool wxRegion::Subtract( const wxRegion& region )
+GdkRegion *wxRegion::GetRegion() const
 {
-  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 (!m_refData)
+        return (GdkRegion*) NULL;
+
+    return M_REGIONDATA->m_region;
 }
 
-bool wxRegion::Xor( long x, long y, long width, long height )
+// ----------------------------------------------------------------------------
+// wxRegionIterator
+// ----------------------------------------------------------------------------
+
+// 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
+
+#include <gdk/gdkprivate.h>
+
+struct _XBox {
+    short x1, x2, y1, y2;
+};
+
+struct _XRegion {
+    long   size , numRects;
+    _XBox *rects, extents;
+};
+
+
+class wxRIRefData: public wxObjectRefData
 {
-  wxRegion reg( x, y, width, height );
-  Xor( reg );
-  return TRUE;
+public:
+    wxRIRefData() { Init(); }
+    virtual ~wxRIRefData();
+
+    void CreateRects( const wxRegion& r );
+
+    void Init() { m_rects = NULL; m_numRects = 0; }
+
+    wxRect *m_rects;
+    size_t  m_numRects;
+};
+
+wxRIRefData::~wxRIRefData()
+{
+    delete [] m_rects;
 }
 
-bool wxRegion::Xor( const wxRect& rect )
+void wxRIRefData::CreateRects( const wxRegion& region )
 {
-  wxRegion reg( rect );
-  Xor( reg );
-  return TRUE;
+    delete [] m_rects;
+
+    Init();
+
+    GdkRegion *gdkregion = region.GetRegion();
+    if (!gdkregion)
+        return;
+
+    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;
+            }
+        }
+    }
 }
 
-bool wxRegion::Xor( const wxRegion& region )
+wxRegionIterator::wxRegionIterator()
 {
-  GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
-  gdk_region_destroy( M_REGIONDATA->m_region );
-  M_REGIONDATA->m_region = reg;
-  return TRUE;
+    m_refData = new wxRIRefData();
+    Reset();
 }
 
-void wxRegion::GetBox( long& x, long& y, long&w, long &h ) const
+wxRegionIterator::wxRegionIterator( const wxRegion& region )
 {
-  x = 0;
-  y = 0;
-  w = -1;
-  h = -1;
+    m_refData = new wxRIRefData();
+    Reset(region);
 }
 
-wxRect wxRegion::GetBox(void) const
+void wxRegionIterator::Reset( const wxRegion& region )
 {
-  return wxRect( 0, 0, -1, -1 );
+    m_region = region;
+    ((wxRIRefData*)m_refData)->CreateRects(region);
+    Reset();
 }
 
-bool wxRegion::Empty(void) const
+bool wxRegionIterator::HaveRects() const
 {
-  return gdk_region_empty( M_REGIONDATA->m_region );
+    return m_current < ((wxRIRefData*)m_refData)->m_numRects;
 }
 
-wxRegionContain wxRegion::Contains( long x, long y ) const
+wxRegionIterator& wxRegionIterator::operator ++ ()
 {
-  if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
-    return wxInRegion;
-  else
-    return wxOutRegion;
+    if (HaveRects())
+        ++m_current;
+
+    return *this;
+}
+
+wxRegionIterator wxRegionIterator::operator ++ (int)
+{
+    wxRegionIterator tmp = *this;
+    if (HaveRects())
+        ++m_current;
+
+    return tmp;
+}
+
+wxCoord wxRegionIterator::GetX() const
+{
+    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
+
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
+}
+
+wxCoord wxRegionIterator::GetY() const
+{
+    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
+
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
 }
 
-wxRegionContain wxRegion::Contains( long x, long y, long w, long h ) const
+wxCoord wxRegionIterator::GetW() 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;
+    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
+
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
 }
 
-GdkRegion *wxRegion::GetRegion(void) const
+wxCoord wxRegionIterator::GetH() const
 {
-  return M_REGIONDATA->m_region;
+    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
+
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
 }
 
+wxRect wxRegionIterator::GetRect() const
+{
+    wxRect r;
+    if( HaveRects() )
+        r = ((wxRIRefData*)m_refData)->m_rects[m_current];
+
+    return r;
+}