applied patch for compilation with gcc 3.0

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

diff --git a/src/msw/dcclient.cpp b/src/msw/dcclient.cpp
index 3f6a4be1964a59ef6a34db87a6a3f79885f0885f..1cee9d8212d28daef8553011f74bbb334effaed4 100644 (file)
--- a/src/msw/dcclient.cpp
+++ b/src/msw/dcclient.cpp
@@ -62,11 +62,9 @@ WX_DEFINE_OBJARRAY(wxArrayDCInfo);
 // macros
 // ----------------------------------------------------------------------------
 
 // macros
 // ----------------------------------------------------------------------------
 

-#if !USE_SHARED_LIBRARY
-    IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
-    IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
-    IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
-#endif
+IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
+IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
+IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)

 
 // ----------------------------------------------------------------------------
 // global variables
 
 // ----------------------------------------------------------------------------
 // global variables


@@ -79,7 +77,7 @@ static PAINTSTRUCT g_paintStruct;
     // created in resopnse to WM_PAINT message - doing this from elsewhere is a
     // common programming error among wxWindows programmers and might lead to
     // very subtle and difficult to debug refresh/repaint bugs.
     // created in resopnse to WM_PAINT message - doing this from elsewhere is a
     // common programming error among wxWindows programmers and might lead to
     // very subtle and difficult to debug refresh/repaint bugs.

-    bool g_isPainting = FALSE;
+    int g_isPainting = 0;

 #endif // __WXDEBUG__
 
 // ===========================================================================
 #endif // __WXDEBUG__
 
 // ===========================================================================


@@ -92,29 +90,30 @@ static PAINTSTRUCT g_paintStruct;
 
 wxWindowDC::wxWindowDC()
 {
 
 wxWindowDC::wxWindowDC()
 {

-  m_canvas = NULL;
+    m_canvas = NULL;

 }
 
 }
 

-wxWindowDC::wxWindowDC(wxWindow *the_canvas)
+wxWindowDC::wxWindowDC(wxWindow *canvas)

 {
 {

-  m_canvas = the_canvas;
-  m_hDC = (WXHDC) ::GetWindowDC(GetWinHwnd(the_canvas) );
-  m_hDCCount++;
+    wxCHECK_RET( canvas, _T("invalid window in wxWindowDC") );
+
+    m_canvas = canvas;
+    m_hDC = (WXHDC) ::GetWindowDC(GetHwndOf(m_canvas));

 
 

-  SetBackground(wxBrush(m_canvas->GetBackgroundColour(), wxSOLID));
+    // m_bOwnsDC was already set to false in the base class ctor, so the DC
+    // will be released (and not deleted) in ~wxDC
+
+    InitDC();

 }
 
 }
 

-wxWindowDC::~wxWindowDC()
+void wxWindowDC::InitDC()

 {
 {

-  if (m_canvas && m_hDC)
-  {
-    SelectOldObjects(m_hDC);
-
-    ::ReleaseDC(GetWinHwnd(m_canvas), GetHdc());
-    m_hDC = 0;
-  }
+    // the background mode is only used for text background and is set in
+    // DrawText() to OPAQUE as required, otherwise always TRANSPARENT,
+    ::SetBkMode(GetHdc(), TRANSPARENT);

 
 

-  m_hDCCount--;
+    // default bg colour is pne of the window
+    SetBackground(wxBrush(m_canvas->GetBackgroundColour(), wxSOLID));

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -123,26 +122,20 @@ wxWindowDC::~wxWindowDC()
 
 wxClientDC::wxClientDC()
 {
 
 wxClientDC::wxClientDC()
 {

-  m_canvas = NULL;
+    m_canvas = NULL;

 }
 
 }
 

-wxClientDC::wxClientDC(wxWindow *the_canvas)
+wxClientDC::wxClientDC(wxWindow *canvas)

 {
 {

-  m_canvas = the_canvas;
-  m_hDC = (WXHDC) ::GetDC(GetWinHwnd(the_canvas));
+    wxCHECK_RET( canvas, _T("invalid window in wxClientDC") );

 
 

-  SetBackground(wxBrush(m_canvas->GetBackgroundColour(), wxSOLID));
-}
+    m_canvas = canvas;
+    m_hDC = (WXHDC)::GetDC(GetHwndOf(m_canvas));

 
 

-wxClientDC::~wxClientDC()
-{
-  if ( m_canvas && GetHdc() )
-  {
-    SelectOldObjects(m_hDC);
+    // m_bOwnsDC was already set to false in the base class ctor, so the DC
+    // will be released (and not deleted) in ~wxDC

 
 

-    ::ReleaseDC(GetWinHwnd(m_canvas), GetHdc());
-    m_hDC = 0;
-  }
+    InitDC();

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -150,7 +143,7 @@ wxClientDC::~wxClientDC()
 // ----------------------------------------------------------------------------
 
 // VZ: initial implementation (by JACS) only remembered the last wxPaintDC
 // ----------------------------------------------------------------------------
 
 // VZ: initial implementation (by JACS) only remembered the last wxPaintDC

-//     created and tried to reuse - this was supposed to take care of a
+//     created and tried to reuse it - this was supposed to take care of a

 //     situation when a derived class OnPaint() calls base class OnPaint()
 //     because in this case ::BeginPaint() shouldn't be called second time.
 //
 //     situation when a derived class OnPaint() calls base class OnPaint()
 //     because in this case ::BeginPaint() shouldn't be called second time.
 //


@@ -170,17 +163,16 @@ wxArrayDCInfo wxPaintDC::ms_cache;
 wxPaintDC::wxPaintDC()
 {
     m_canvas = NULL;
 wxPaintDC::wxPaintDC()
 {
     m_canvas = NULL;

-    m_hDC = 0;

 }
 
 wxPaintDC::wxPaintDC(wxWindow *canvas)
 {
 }
 
 wxPaintDC::wxPaintDC(wxWindow *canvas)
 {

-    wxCHECK_RET( canvas, _T("NULL canvas in wxPaintDC ctor") );
+    wxCHECK_RET( canvas, wxT("NULL canvas in wxPaintDC ctor") );

 
 #ifdef __WXDEBUG__
 
 #ifdef __WXDEBUG__

-    if ( !g_isPainting )
+    if ( g_isPainting <= 0 )

     {
     {

-        wxFAIL_MSG( _T("wxPaintDC may be created only in EVT_PAINT handler!") );
+        wxFAIL_MSG( wxT("wxPaintDC may be created only in EVT_PAINT handler!") );

 
         return;
     }
 
         return;
     }


@@ -197,29 +189,39 @@ wxPaintDC::wxPaintDC(wxWindow *canvas)
     }
     else // not in cache, create a new one
     {
     }
     else // not in cache, create a new one
     {

-        m_hDC = (WXHDC)::BeginPaint(GetWinHwnd(m_canvas), &g_paintStruct);
+        m_hDC = (WXHDC)::BeginPaint(GetHwndOf(m_canvas), &g_paintStruct);

         ms_cache.Add(new wxPaintDCInfo(m_canvas, this));
     }
 
         ms_cache.Add(new wxPaintDCInfo(m_canvas, this));
     }
 

-    SetBackground(wxBrush(m_canvas->GetBackgroundColour(), wxSOLID));
+    InitDC();

 }
 
 wxPaintDC::~wxPaintDC()
 {
     if ( m_hDC )
     {
 }
 
 wxPaintDC::~wxPaintDC()
 {
     if ( m_hDC )
     {

+        SelectOldObjects(m_hDC);
+

         size_t index;
         wxPaintDCInfo *info = FindInCache(&index);
 
         size_t index;
         wxPaintDCInfo *info = FindInCache(&index);
 

-        wxCHECK_RET( info, _T("existing DC should have a cache entry") );
+        wxCHECK_RET( info, wxT("existing DC should have a cache entry") );

 
         if ( !--info->count )
         {
 
         if ( !--info->count )
         {

-            ::EndPaint(GetWinHwnd(m_canvas), &g_paintStruct);
+            ::EndPaint(GetHwndOf(m_canvas), &g_paintStruct);

 
             ms_cache.Remove(index);
 
             ms_cache.Remove(index);

+
+            // Reduce the number of bogus reports of non-freed memory
+            // at app exit
+            if (ms_cache.IsEmpty())
+                ms_cache.Clear();

         }
         //else: cached DC entry is still in use
         }
         //else: cached DC entry is still in use

+
+        // prevent the base class dtor from ReleaseDC()ing it again
+        m_hDC = 0;

     }
 }
 
     }
 }
 


@@ -240,3 +242,20 @@ wxPaintDCInfo *wxPaintDC::FindInCache(size_t *index) const
 
     return info;
 }
 
     return info;
 }

+
+// find the entry for this DC in the cache (keyed by the window)
+WXHDC wxPaintDC::FindDCInCache(wxWindow* win)
+{
+    wxPaintDCInfo *info = NULL;
+    size_t nCache = ms_cache.GetCount();
+    for ( size_t n = 0; n < nCache; n++ )
+    {
+        info = &ms_cache[n];
+        if ( info->hwnd == win->GetHWND() )
+        {
+            return info->hdc;
+        }
+    }
+    return 0;
+}
+