work around probable bug in GTK+ 2.18 when calling WriteText on a new, empty control...

[wxWidgets.git] / src / msw / region.cpp

diff --git a/src/msw/region.cpp b/src/msw/region.cpp
index 5e7fae2b07a407faf42d305b044b63c6671dfa40..73d983df890ae7a959bfeb94449fbe879a024976 100644 (file)
--- a/src/msw/region.cpp
+++ b/src/msw/region.cpp
@@ -1,52 +1,58 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        msw/region.cpp
-// Purpose:   Region handling for wxWindows/X11
-// Author:    Markus Holzem
+// Name:      src/msw/region.cpp
+// Purpose:   wxRegion implementation using Win32 API
+// Author:    Vadim Zeitlin

 // Modified by:
 // Created:   Fri Oct 24 10:46:34 MET 1997
 // Modified by:
 // Created:   Fri Oct 24 10:46:34 MET 1997

-// RCS-ID:       $Id$
-// Copyright: (c) 1997 Julian Smart and Markus Holzem
+// RCS-ID:    $Id$
+// Copyright: (c) 1997-2002 wxWidgets team

 // 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"
 
 #ifdef __BORLANDC__
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #endif
 

-#include "wx/msw/region.h"
-#include "wx/gdicmn.h"
+#include "wx/region.h"

 
 

-#include <windows.h>
-
-#if !USE_SHARED_LIBRARY
-       IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
-       IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
+#ifndef WX_PRECOMP
+    #include "wx/gdicmn.h"

 #endif
 
 #endif
 

-//-----------------------------------------------------------------------------
+#include "wx/msw/private.h"
+
+IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
+IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
+
+// ----------------------------------------------------------------------------

 // wxRegionRefData implementation
 // wxRegionRefData implementation

-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------

 
 

-class WXDLLEXPORT wxRegionRefData : public wxGDIRefData {
+class WXDLLEXPORT wxRegionRefData : public wxGDIRefData
+{

 public:
 public:

-       wxRegionRefData(void)
-       {
+    wxRegionRefData()
+    {

         m_region = 0;
         m_region = 0;

-       }
+    }

 
 

-       wxRegionRefData(const wxRegionRefData& data)
-       {
-#if defined(__WIN32__)
+    wxRegionRefData(const wxRegionRefData& data) : wxGDIRefData()
+    {
+#if defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)

         DWORD noBytes = ::GetRegionData(data.m_region, 0, NULL);
         RGNDATA *rgnData = (RGNDATA*) new char[noBytes];
         DWORD noBytes = ::GetRegionData(data.m_region, 0, NULL);
         RGNDATA *rgnData = (RGNDATA*) new char[noBytes];

-               ::GetRegionData(data.m_region, noBytes, rgnData);
+        ::GetRegionData(data.m_region, noBytes, rgnData);

         m_region = ::ExtCreateRegion(NULL, noBytes, rgnData);
         delete[] (char*) rgnData;
 #else
         m_region = ::ExtCreateRegion(NULL, noBytes, rgnData);
         delete[] (char*) rgnData;
 #else


@@ -54,30 +60,39 @@ public:
         ::GetRgnBox(data.m_region, &rect);
         m_region = ::CreateRectRgnIndirect(&rect);
 #endif
         ::GetRgnBox(data.m_region, &rect);
         m_region = ::CreateRectRgnIndirect(&rect);
 #endif

-       }
+    }

 
 

-       ~wxRegionRefData(void)
-       {
-               ::DeleteObject(m_region);
+    virtual ~wxRegionRefData()
+    {
+        ::DeleteObject(m_region);

         m_region = 0;
         m_region = 0;

-       }
+    }
+
+    HRGN m_region;

 
 

-       HRGN m_region;
+private:
+// Cannot use
+//  wxDECLARE_NO_COPY_CLASS(wxRegionRefData);
+// because copy constructor is explicitly declared above;
+// but no copy assignment operator is defined, so declare
+// it private to prevent the compiler from defining it:
+    wxRegionRefData& operator=(const wxRegionRefData&);

 };
 
 #define M_REGION (((wxRegionRefData*)m_refData)->m_region)
 };
 
 #define M_REGION (((wxRegionRefData*)m_refData)->m_region)

+#define M_REGION_OF(rgn) (((wxRegionRefData*)(rgn.m_refData))->m_region)

 
 

-//-----------------------------------------------------------------------------
-// wxRegion
-//-----------------------------------------------------------------------------
+// ============================================================================
+// wxRegion implementation
+// ============================================================================

 
 

-/*!
- * Create an empty region.
- */
-wxRegion::wxRegion(void)
+// ----------------------------------------------------------------------------
+// ctors and dtor
+// ----------------------------------------------------------------------------
+
+wxRegion::wxRegion()

 {
 {

-    m_refData = new wxRegionRefData;
-    M_REGION = ::CreateRectRgn(0, 0, 0, 0);
+    m_refData = NULL;

 }
 
 wxRegion::wxRegion(WXHRGN hRegion)
 }
 
 wxRegion::wxRegion(WXHRGN hRegion)


@@ -86,7 +101,7 @@ wxRegion::wxRegion(WXHRGN hRegion)
     M_REGION = (HRGN) hRegion;
 }
 
     M_REGION = (HRGN) hRegion;
 }
 

-wxRegion::wxRegion(long x, long y, long w, long h)
+wxRegion::wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)

 {
     m_refData = new wxRegionRefData;
     M_REGION = ::CreateRectRgn(x, y, x + w, y + h);
 {
     m_refData = new wxRegionRefData;
     M_REGION = ::CreateRectRgn(x, y, x + w, y + h);


@@ -101,319 +116,353 @@ wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight)
 wxRegion::wxRegion(const wxRect& rect)
 {
     m_refData = new wxRegionRefData;
 wxRegion::wxRegion(const wxRect& rect)
 {
     m_refData = new wxRegionRefData;

-    M_REGION = ::CreateRectRgn(rect.GetLeft(), rect.GetTop(), rect.GetRight(), rect.GetBottom());
+    M_REGION = ::CreateRectRgn(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height);

 }
 
 }
 

-/*!
- * Destroy the region.
- */
-wxRegion::~wxRegion(void)
+wxRegion::wxRegion(size_t n, const wxPoint *points, wxPolygonFillMode fillStyle)
+{
+#if defined(__WXMICROWIN__) || defined(__WXWINCE__)
+    wxUnusedVar(n);
+    wxUnusedVar(points);
+    wxUnusedVar(fillStyle);
+    m_refData = NULL;
+    M_REGION = NULL;
+#else
+    m_refData = new wxRegionRefData;
+    M_REGION = ::CreatePolygonRgn
+               (
+                    (POINT*)points,
+                    n,
+                    fillStyle == wxODDEVEN_RULE ? ALTERNATE : WINDING
+               );
+#endif
+}
+
+wxRegion::~wxRegion()

 {
     // m_refData unrefed in ~wxObject
 }
 
 {
     // m_refData unrefed in ~wxObject
 }
 

-//-----------------------------------------------------------------------------
-//# Modify region
-//-----------------------------------------------------------------------------
+wxGDIRefData *wxRegion::CreateGDIRefData() const
+{
+    return new wxRegionRefData;
+}

 
 

-//! Clear current region
-void wxRegion::Clear(void)
+wxGDIRefData *wxRegion::CloneGDIRefData(const wxGDIRefData *data) const

 {
 {

-       UnRef();
+    return new wxRegionRefData(*(wxRegionRefData *)data);

 }
 
 }
 

-//! Combine rectangle (x, y, w, h) with this.
-bool wxRegion::Combine(long x, long y, long width, long height, wxRegionOp op)
+// ----------------------------------------------------------------------------
+// wxRegion operations
+// ----------------------------------------------------------------------------
+
+// Clear current region
+void wxRegion::Clear()

 {
 {

-       // Don't change shared data
-       if (!m_refData) {
-               m_refData = new wxRegionRefData();
-       } else if (m_refData->GetRefCount() > 1) {
-               wxRegionRefData* ref = (wxRegionRefData*)m_refData;
-               UnRef();
-               m_refData = new wxRegionRefData(*ref);
-       }
-    // If ref count is 1, that means it's 'ours' anyway so no action.
-
-    HRGN rectRegion = ::CreateRectRgn(x, y, x + width, y + height);
-
-    int mode = 0;
-    switch (op)
+    UnRef();
+}
+
+bool wxRegion::DoOffset(wxCoord x, wxCoord y)
+{
+    wxCHECK_MSG( M_REGION, false, wxT("invalid wxRegion") );
+
+    if ( !x && !y )

     {
     {

-        case wxRGN_AND: mode = RGN_AND; break ;
-        case wxRGN_OR: mode = RGN_OR; break ;
-        case wxRGN_XOR: mode = RGN_XOR; break ;
-        case wxRGN_DIFF: mode = RGN_DIFF; break ;
-        case wxRGN_COPY:
-        default:
-            mode = RGN_COPY; break ;
+        // nothing to do
+        return true;

     }
 
     }
 

-       bool success = (ERROR != ::CombineRgn(M_REGION, M_REGION, rectRegion, mode));
+    AllocExclusive();

 
 

-    ::DeleteObject(rectRegion);
+    if ( ::OffsetRgn(GetHrgn(), x, y) == ERROR )
+    {
+        wxLogLastError(wxT("OffsetRgn"));

 
 

-    return success;
+        return false;
+    }
+
+    return true;

 }
 
 }
 

-//! Union /e region with this.
-bool wxRegion::Combine(const wxRegion& region, wxRegionOp op)
+// combine another region with this one
+bool wxRegion::DoCombine(const wxRegion& rgn, wxRegionOp op)

 {
 {

-       if (region.Empty())
-               return FALSE;
-
-       // Don't change shared data
-       if (!m_refData) {
-               m_refData = new wxRegionRefData();
-       } else  if (m_refData->GetRefCount() > 1) {
-               wxRegionRefData* ref = (wxRegionRefData*)m_refData;
-               UnRef();
-               m_refData = new wxRegionRefData(*ref);
-       }
-
-    int mode = 0;
-    switch (op)
+    // we can't use the API functions if we don't have a valid region handle
+    if ( !m_refData )

     {
     {

-        case wxRGN_AND: mode = RGN_AND; break ;
-        case wxRGN_OR: mode = RGN_OR; break ;
-        case wxRGN_XOR: mode = RGN_XOR; break ;
-        case wxRGN_DIFF: mode = RGN_DIFF; break ;
-        case wxRGN_COPY:
-        default:
-            mode = RGN_COPY; break ;
+        // combining with an empty/invalid region works differently depending
+        // on the operation
+        switch ( op )
+        {
+            case wxRGN_COPY:
+            case wxRGN_OR:
+            case wxRGN_XOR:
+                *this = rgn;
+                break;
+
+            default:
+                wxFAIL_MSG( wxT("unknown region operation") );
+                // fall through
+
+            case wxRGN_AND:
+            case wxRGN_DIFF:
+                // leave empty/invalid
+                return false;
+        }

     }
     }

+    else // we have a valid region
+    {
+        AllocExclusive();

 
 

-       return (ERROR != ::CombineRgn(M_REGION, M_REGION, ((wxRegionRefData*)region.m_refData)->m_region, mode));
-}
+        int mode;
+        switch ( op )
+        {
+            case wxRGN_AND:
+                mode = RGN_AND;
+                break;

 
 

-bool wxRegion::Combine(const wxRect& rect, wxRegionOp op)
-{
-    return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op);
+            case wxRGN_OR:
+                mode = RGN_OR;
+                break;
+
+            case wxRGN_XOR:
+                mode = RGN_XOR;
+                break;
+
+            case wxRGN_DIFF:
+                mode = RGN_DIFF;
+                break;
+
+            default:
+                wxFAIL_MSG( wxT("unknown region operation") );
+                // fall through
+
+            case wxRGN_COPY:
+                mode = RGN_COPY;
+                break;
+        }
+
+        if ( ::CombineRgn(M_REGION, M_REGION, M_REGION_OF(rgn), mode) == ERROR )
+        {
+            wxLogLastError(wxT("CombineRgn"));
+
+            return false;
+        }
+    }
+
+    return true;

 }
 
 }
 

-//-----------------------------------------------------------------------------
-//# Information on region
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxRegion bounding box
+// ----------------------------------------------------------------------------

 
 // Outer bounds of region
 
 // Outer bounds of region

-void wxRegion::GetBox(long& x, long& y, long&w, long &h) const
+bool wxRegion::DoGetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const

 {
 {

-       if (m_refData) {
+    if (m_refData)
+    {

         RECT rect;
         ::GetRgnBox(M_REGION, & rect);
         RECT rect;
         ::GetRgnBox(M_REGION, & rect);

-               x = rect.left;
-               y = rect.top;
-               w = rect.right - rect.left;
-               h = rect.bottom - rect.top;
-       } else {
-               x = y = w = h = 0;
-       }
-}
+        x = rect.left;
+        y = rect.top;
+        w = rect.right - rect.left;
+        h = rect.bottom - rect.top;

 
 

-wxRect wxRegion::GetBox(void) const
-{
-    long x, y, w, h;
-    GetBox(x, y, w, h);
-    return wxRect(x, y, w, h);
+        return true;
+    }
+    else
+    {
+        x = y = w = h = 0;
+
+        return false;
+    }

 }
 
 // Is region empty?
 }
 
 // Is region empty?

-bool wxRegion::Empty(void) const
+bool wxRegion::IsEmpty() const

 {
 {

-    if (M_REGION == 0)
-        return TRUE;
-    long x, y, w, h;
+    wxCoord x, y, w, h;

     GetBox(x, y, w, h);
 
     GetBox(x, y, w, h);
 

-    return ((w == 0) && (h == 0));
+    return (w == 0) && (h == 0);

 }
 
 }
 

-//-----------------------------------------------------------------------------
-//# Tests
-//-----------------------------------------------------------------------------
-
-// Does the region contain the point (x,y)?
-wxRegionContain wxRegion::Contains(long x, long y) const
+bool wxRegion::DoIsEqual(const wxRegion& region) const

 {
 {

-       if (!m_refData)
-               return wxOutRegion;
-
-    if (::PtInRegion(M_REGION, (int) x, (int) y))
-        return wxInRegion;
-    else
-        return wxOutRegion;
+    return ::EqualRgn(M_REGION, M_REGION_OF(region)) != 0;

 }
 
 }
 

-// Does the region contain the point pt?
-wxRegionContain wxRegion::Contains(const wxPoint& pt) const
-{
-       if (!m_refData)
-               return wxOutRegion;
+// ----------------------------------------------------------------------------
+// wxRegion hit testing
+// ----------------------------------------------------------------------------

 
 

-    if (::PtInRegion(M_REGION, (int) pt.x, (int) pt.y))
-        return wxInRegion;
-    else
+// Does the region contain the point (x,y)?
+wxRegionContain wxRegion::DoContainsPoint(wxCoord x, wxCoord y) const
+{
+    if (!m_refData)

         return wxOutRegion;
         return wxOutRegion;

+
+    return ::PtInRegion(M_REGION, (int) x, (int) y) ? wxInRegion : wxOutRegion;

 }
 
 // Does the region contain the rectangle (x, y, w, h)?
 }
 
 // Does the region contain the rectangle (x, y, w, h)?

-wxRegionContain wxRegion::Contains(long x, long y, long w, long h) const
+wxRegionContain wxRegion::DoContainsRect(const wxRect& rect) const

 {
 {

-       if (!m_refData)
-               return wxOutRegion;
+    if (!m_refData)
+        return wxOutRegion;

 
 

-    RECT rect;
-    rect.left = x;
-    rect.top = y;
-    rect.right = x + w;
-    rect.bottom = y + h;
+    RECT rc;
+    wxCopyRectToRECT(rect, rc);

 
 

-    if (::RectInRegion(M_REGION, & rect))
-        return wxInRegion;
-    else
-        return wxOutRegion;
+    return ::RectInRegion(M_REGION, &rc) ? wxInRegion : wxOutRegion;

 }
 
 }
 

-// Does the region contain the rectangle rect
-wxRegionContain wxRegion::Contains(const wxRect& rect) const
+// Get internal region handle
+WXHRGN wxRegion::GetHRGN() const

 {
 {

-       if (!m_refData)
-               return wxOutRegion;
-
-    long x, y, w, h;
-    x = rect.x;
-    y = rect.y;
-    w = rect.GetWidth();
-    h = rect.GetHeight();
-    return Contains(x, y, w, h);
+    return (WXHRGN)(m_refData ? M_REGION : 0);

 }
 
 }
 

-///////////////////////////////////////////////////////////////////////////////
-//                                                                                                                                                      //
-//                                                        wxRegionIterator                                                              //
-//                                                                                                                                                      //
-///////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// wxRegionIterator implementation
+// ============================================================================

 
 

-/*!
- * Initialize empty iterator
- */
-wxRegionIterator::wxRegionIterator(void) : m_current(0), m_numRects(0), m_rects(NULL)
+// ----------------------------------------------------------------------------
+// wxRegionIterator ctors/dtor
+// ----------------------------------------------------------------------------
+
+void wxRegionIterator::Init()

 {
 {

+    m_current =
+    m_numRects = 0;
+
+    m_rects = NULL;

 }
 
 }
 

-wxRegionIterator::~wxRegionIterator(void)
+wxRegionIterator::~wxRegionIterator()

 {
 {

-    if (m_rects)
-        delete[] m_rects;
+    delete [] m_rects;

 }
 
 }
 

-/*!
- * Initialize iterator for region
- */
+// Initialize iterator for region

 wxRegionIterator::wxRegionIterator(const wxRegion& region)
 {
     m_rects = NULL;
 
 wxRegionIterator::wxRegionIterator(const wxRegion& region)
 {
     m_rects = NULL;
 

-       Reset(region);
+    Reset(region);
+}
+
+wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri)
+{
+    delete [] m_rects;
+
+    m_current = ri.m_current;
+    m_numRects = ri.m_numRects;
+    if ( m_numRects )
+    {
+        m_rects = new wxRect[m_numRects];
+        for ( long n = 0; n < m_numRects; n++ )
+            m_rects[n] = ri.m_rects[n];
+    }
+    else
+    {
+        m_rects = NULL;
+    }
+
+    return *this;

 }
 
 }
 

-/*!
- * Reset iterator for a new /e region.
- */
+// ----------------------------------------------------------------------------
+// wxRegionIterator operations
+// ----------------------------------------------------------------------------
+
+// Reset iterator for a new region.

 void wxRegionIterator::Reset(const wxRegion& region)
 {
 void wxRegionIterator::Reset(const wxRegion& region)
 {

-       m_current = 0;
-       m_region = region;
+    m_current = 0;
+    m_region = region;

 
     if (m_rects)
 
     if (m_rects)

+    {

         delete[] m_rects;
 
         delete[] m_rects;
 

-    m_rects = NULL;
+        m_rects = NULL;
+    }

 
 

-       if (m_region.Empty())
-               m_numRects = 0;
-       else
+    if (m_region.Empty())
+        m_numRects = 0;
+    else

     {
     {

-#if defined(__WIN32__)

         DWORD noBytes = ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, 0, NULL);
         RGNDATA *rgnData = (RGNDATA*) new char[noBytes];
         DWORD noBytes = ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, 0, NULL);
         RGNDATA *rgnData = (RGNDATA*) new char[noBytes];

-               ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, noBytes, rgnData);
+        ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, noBytes, rgnData);

 
         RGNDATAHEADER* header = (RGNDATAHEADER*) rgnData;
 
         m_rects = new wxRect[header->nCount];
 
 
         RGNDATAHEADER* header = (RGNDATAHEADER*) rgnData;
 
         m_rects = new wxRect[header->nCount];
 

-        RECT* rect = (RECT*) (rgnData + sizeof(RGNDATAHEADER)) ;
+        RECT* rect = (RECT*) ((char*)rgnData + sizeof(RGNDATAHEADER));

         size_t i;
         for (i = 0; i < header->nCount; i++)
         {
             m_rects[i] = wxRect(rect->left, rect->top,
                                  rect->right - rect->left, rect->bottom - rect->top);
         size_t i;
         for (i = 0; i < header->nCount; i++)
         {
             m_rects[i] = wxRect(rect->left, rect->top,
                                  rect->right - rect->left, rect->bottom - rect->top);

-            rect += sizeof(RECT);
+            rect ++; // Advances pointer by sizeof(RECT)

         }
 
         m_numRects = header->nCount;
 
         delete[] (char*) rgnData;
         }
 
         m_numRects = header->nCount;
 
         delete[] (char*) rgnData;

-#else
-        RECT rect;
-        ::GetRgnBox(((wxRegionRefData*)region.m_refData)->m_region, &rect);
-        m_rects = new wxRect[1];
-        m_rects[0].x = rect.left;
-        m_rects[0].y = rect.top;
-        m_rects[0].width = rect.right - rect.left;
-        m_rects[0].height = rect.bottom - rect.top;
-
-        m_numRects = 1;
-#endif

     }
 }
 
     }
 }
 

-/*!
- * Increment iterator. The rectangle returned is the one after the
- * incrementation.
- */
-void wxRegionIterator::operator ++ (void)
+wxRegionIterator& wxRegionIterator::operator++()

 {
 {

-       if (m_current < m_numRects)
-               ++m_current;
+    if (m_current < m_numRects)
+        ++m_current;
+
+    return *this;

 }
 
 }
 

-/*!
- * Increment iterator. The rectangle returned is the one before the
- * incrementation.
- */
-void wxRegionIterator::operator ++ (int)
+wxRegionIterator wxRegionIterator::operator ++ (int)

 {
 {

-       if (m_current < m_numRects)
-               ++m_current;
+    wxRegionIterator tmp = *this;
+    if (m_current < m_numRects)
+        ++m_current;
+
+    return tmp;

 }
 
 }
 

-long wxRegionIterator::GetX(void) const
+// ----------------------------------------------------------------------------
+// wxRegionIterator accessors
+// ----------------------------------------------------------------------------
+
+wxCoord wxRegionIterator::GetX() const

 {
 {

-       if (m_current < m_numRects)
-               return m_rects[m_current].x;
-       return 0;
+    wxCHECK_MSG( m_current < m_numRects, 0, wxT("invalid wxRegionIterator") );
+
+    return m_rects[m_current].x;

 }
 
 }
 

-long wxRegionIterator::GetY(void) const
+wxCoord wxRegionIterator::GetY() const

 {
 {

-       if (m_current < m_numRects)
-               return m_rects[m_current].y;
-       return 0;
+    wxCHECK_MSG( m_current < m_numRects, 0, wxT("invalid wxRegionIterator") );
+
+    return m_rects[m_current].y;

 }
 
 }
 

-long wxRegionIterator::GetW(void) const
+wxCoord wxRegionIterator::GetW() const

 {
 {

-       if (m_current < m_numRects)
-               return m_rects[m_current].width ;
-       return 0;
+    wxCHECK_MSG( m_current < m_numRects, 0, wxT("invalid wxRegionIterator") );
+
+    return m_rects[m_current].width;

 }
 
 }
 

-long wxRegionIterator::GetH(void) const
+wxCoord wxRegionIterator::GetH() const

 {
 {

-       if (m_current < m_numRects)
-               return m_rects[m_current].height;
-       return 0;
-}
+    wxCHECK_MSG( m_current < m_numRects, 0, wxT("invalid wxRegionIterator") );

 
 

+    return m_rects[m_current].height;
+}