X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/aed8ac3f8954c07fb2dee3e2ba9ae02fa8890428..137c8bde085d6d5b7c459902d2ea1a198ab48765:/src/gtk/region.cpp?ds=sidebyside

diff --git a/src/gtk/region.cpp b/src/gtk/region.cpp
index a19730b0d0..0fd5a8ac44 100644
--- a/src/gtk/region.cpp
+++ b/src/gtk/region.cpp
@@ -1,325 +1,369 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        region.cpp
+// Name:        src/gtk/region.cpp
 // Purpose:
 // Author:      Robert Roebling
+// Modified:    VZ at 05.10.00: use AllocExclusive(), comparison fixed
 // Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling
-// Licence:   	wxWindows licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "region.h"
-#endif
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
 
 #include "wx/region.h"
 
-#include <gdk/gdk.h>
-#include <gtk/gtk.h>
+#ifndef WX_PRECOMP
+    #include "wx/log.h"
+#endif
 
-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+#include "wx/gtk/private.h"
 
-class wxRegionRefData: public wxObjectRefData
-{
-  public:
-  
-    wxRegionRefData();
-    ~wxRegionRefData();
-  
-  public:    
 
-    GdkRegion  *m_region;
-    wxList      m_rects;
-};
+// ----------------------------------------------------------------------------
+// wxRegionRefData: private class containing the information about the region
+// ----------------------------------------------------------------------------
 
-wxRegionRefData::wxRegionRefData()
+class wxRegionRefData : public wxObjectRefData
 {
-    m_region = (GdkRegion *) NULL;
-}
+public:
+    wxRegionRefData()
+    {
+        m_region = NULL;
+    }
 
-wxRegionRefData::~wxRegionRefData()
-{
-    if (m_region) gdk_region_destroy( m_region );
-  
-    wxNode *node = m_rects.First();
-    while (node)
+    wxRegionRefData(const wxRegionRefData& refData)
+        : wxObjectRefData()
     {
-        wxRect *r = (wxRect*)node->Data();
-        delete r;
-        node = node->Next();
+        m_region = gdk_region_copy(refData.m_region);
     }
-}
 
-//-----------------------------------------------------------------------------
+    ~wxRegionRefData()
+    {
+        if (m_region)
+            gdk_region_destroy( m_region );
+    }
+
+    GdkRegion  *m_region;
+};
+
+// ----------------------------------------------------------------------------
+// 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)
 
-IMPLEMENT_DYNAMIC_CLASS(wxRegion,wxGDIObject);
-  
-wxRegion::wxRegion( long x, long y, long w, long h )
+void wxRegion::InitRect(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;
-    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) );
+
+    m_refData = new wxRegionRefData();
+
+    M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
 }
 
-wxRegion::wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
+wxRegion::wxRegion( GdkRegion *region )
 {
     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_REGIONDATA->m_region = gdk_region_copy( region );
 }
 
-wxRegion::wxRegion( const wxRect& rect )
+wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
 {
-    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)
+    GdkPoint *gdkpoints = new GdkPoint[n];
+    for ( size_t i = 0 ; i < n ; i++ )
     {
-        wxRect *r = (wxRect*)node->Data();
-        M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
-        node = node->Next();
+        gdkpoints[i].x = points[i].x;
+        gdkpoints[i].y = points[i].y;
     }
-}
 
-wxRegion::wxRegion()
-{
     m_refData = new wxRegionRefData();
-    M_REGIONDATA->m_region = gdk_region_new();
+
+    GdkRegion* reg = gdk_region_polygon
+                     (
+                        gdkpoints,
+                        n,
+                        fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
+                                                    : GDK_EVEN_ODD_RULE
+                     );
+
+    M_REGIONDATA->m_region = reg;
+
+    delete [] gdkpoints;
 }
 
 wxRegion::~wxRegion()
 {
+    // m_refData unrefed in ~wxObject
 }
 
-bool wxRegion::operator == ( const wxRegion& region )
+wxObjectRefData *wxRegion::CreateRefData() const
 {
-    return m_refData == region.m_refData; 
+    return new wxRegionRefData;
 }
 
-bool wxRegion::operator != ( const wxRegion& region )
+wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const
 {
-    return m_refData != region.m_refData; 
+    return new wxRegionRefData(*(wxRegionRefData *)data);
 }
 
+// ----------------------------------------------------------------------------
+// wxRegion comparison
+// ----------------------------------------------------------------------------
+
+bool wxRegion::operator==( const wxRegion& region ) const
+{
+    if (m_refData == region.m_refData) return true;
+
+    if (!m_refData || !region.m_refData) return false;
+
+    // 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 operations
+// ----------------------------------------------------------------------------
+
 void wxRegion::Clear()
 {
     UnRef();
-    m_refData = new wxRegionRefData();
-    M_REGIONDATA->m_region = gdk_region_new();
 }
 
-bool wxRegion::Union( long x, long y, long width, long height )
+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;
-    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;
+    // 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 ( !width || !height )
+        return true;
+
+    if ( !m_refData )
+    {
+        InitRect(x, y, width, height);
+    }
+    else
+    {
+        AllocExclusive();
+
+        GdkRectangle rect;
+        rect.x = x;
+        rect.y = y;
+        rect.width = width;
+        rect.height = height;
+
+        gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
+    }
+
+    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)
+    if (region.IsNull())
+        return false;
+
+    if (!m_refData)
+    {
+        m_refData = new wxRegionRefData();
+        M_REGIONDATA->m_region = gdk_region_new();
+    }
+    else
     {
-        wxRect *r = (wxRect*)node->Data();
-        M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
-        node = node->Next();
+        AllocExclusive();
     }
-  
-    return TRUE;
+
+    gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
+
+    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;
+
+    return Intersect( reg );
 }
 
 bool wxRegion::Intersect( const wxRect& rect )
 {
     wxRegion reg( rect );
-    Intersect( reg );
-    return TRUE;
+
+    return Intersect( reg );
 }
 
 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)
+    {
+        // intersecting with invalid region doesn't make sense
+        return false;
+    }
+
+    AllocExclusive();
+
+    gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
+
+    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;
+    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 )
 {
-    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)
+    {
+        // subtracting from an invalid region doesn't make sense
+        return false;
+    }
+
+    AllocExclusive();
+
+    gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
+
+    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;
+    return Xor( reg );
 }
 
 bool wxRegion::Xor( const wxRect& rect )
 {
     wxRegion reg( rect );
-    Xor( reg );
-    return TRUE;
+    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)
+    if (region.IsNull())
+        return false;
+
+    if (!m_refData)
     {
-        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 false;
     }
-  
-    return TRUE;
+
+    AllocExclusive();
+
+    gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
+
+    return true;
 }
 
-void wxRegion::GetBox( long& x, long& y, long&w, long &h ) const
+bool wxRegion::Offset( wxCoord x, wxCoord y )
 {
-    x = 0;
-    y = 0;
-    w = -1;
-    h = -1;
-    wxNode *node = GetRectList()->First();
-    while (node)
+    if (!m_refData)
+        return false;
+
+    AllocExclusive();
+
+    gdk_region_offset( M_REGIONDATA->m_region, x, y );
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// wxRegion tests
+// ----------------------------------------------------------------------------
+
+void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
+{
+    if ( m_refData )
     {
-        wxRect *r = (wxRect*)node->Data();
-        if (node == GetRectList()->First())
-        {
-            x = r->x;
-            y = r->y;
-            w = r->width;
-            h = r->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;
-            }
-        }
-        node = node->Next();
+        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
 {
-    long x = 0;
-    long y = 0;
-    long w = -1;
-    long h = -1;
+    wxCoord x, y, w, h;
     GetBox( x, y, w, h );
     return wxRect( x, y, w, h );
 }
 
 bool wxRegion::Empty() const
 {
+    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 (!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
 {
+    if (!m_refData)
+        return wxOutRegion;
+
     GdkRectangle rect;
     rect.x = x;
     rect.y = y;
@@ -347,87 +391,140 @@ wxRegionContain wxRegion::Contains(const wxRect& rect) const
 
 GdkRegion *wxRegion::GetRegion() const
 {
+    if (!m_refData)
+        return (GdkRegion*) NULL;
+
     return M_REGIONDATA->m_region;
 }
 
-wxList *wxRegion::GetRectList() const
+// ----------------------------------------------------------------------------
+// wxRegionIterator
+// ----------------------------------------------------------------------------
+
+class wxRIRefData: public wxObjectRefData
 {
-    return &(M_REGIONDATA->m_rects);
+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;
 }
 
-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+void wxRIRefData::CreateRects( const wxRegion& region )
+{
+    delete [] m_rects;
+
+    Init();
+
+    GdkRegion *gdkregion = region.GetRegion();
+    if (!gdkregion)
+        return;
+
+    GdkRectangle *gdkrects = NULL;
+    gint numRects = 0;
+    gdk_region_get_rectangles( gdkregion, &gdkrects, &numRects );
+
+    m_numRects = numRects;
+    if (numRects)
+    {
+        m_rects = new wxRect[m_numRects];
+        for (size_t i=0; i < m_numRects; ++i)
+        {
+            GdkRectangle &gr = gdkrects[i];
+            wxRect &wr = m_rects[i];
+            wr.x = gr.x;
+            wr.y = gr.y;
+            wr.width = gr.width;
+            wr.height = gr.height;
+        }
+    }
+    g_free( gdkrects );
+}
 
-IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
-  
 wxRegionIterator::wxRegionIterator()
 {
-    m_current = 0;
+    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;
-}
-
-wxRegionIterator::operator bool () const 
-{ 
-    return m_current < m_region.GetRectList()->Number(); 
+    ((wxRIRefData*)m_refData)->CreateRects(region);
+    Reset();
 }
 
-bool wxRegionIterator::HaveRects() const 
-{ 
-    return m_current < m_region.GetRectList()->Number(); 
+bool wxRegionIterator::HaveRects() const
+{
+    return m_current < ((wxRIRefData*)m_refData)->m_numRects;
 }
 
-void wxRegionIterator::operator ++ ()
+wxRegionIterator& wxRegionIterator::operator ++ ()
 {
-    if (m_current < m_region.GetRectList()->Number()) ++m_current;
+    if (HaveRects())
+        ++m_current;
+
+    return *this;
 }
 
-void wxRegionIterator::operator ++ (int)
+wxRegionIterator wxRegionIterator::operator ++ (int)
 {
-    if (m_current < m_region.GetRectList()->Number()) ++m_current;
+    wxRegionIterator tmp = *this;
+    if (HaveRects())
+        ++m_current;
+
+    return tmp;
 }
 
 wxCoord wxRegionIterator::GetX() const
 {
-    wxNode *node = m_region.GetRectList()->Nth( m_current );
-    if (!node) return 0;
-    wxRect *r = (wxRect*)node->Data();
-    return r->x;
+    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
+
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].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;
+    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
+
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].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;
+    wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") );
+
+    return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
 }
 
 wxCoord wxRegionIterator::GetH() const
 {
-    wxNode *node = m_region.GetRectList()->Nth( m_current );
-    if (!node) return 0;
-    wxRect *r = (wxRect*)node->Data();
-    return r->height;
+    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;
+}