X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2bda0e173844e8e0f8acf4e8ad8b5c26e5c6fe5d..77ff2d2639049a0bd8d64d87fbe27694354b7097:/src/msw/dcclient.cpp

diff --git a/src/msw/dcclient.cpp b/src/msw/dcclient.cpp
index c406939a28..4c6b19b03b 100644
--- a/src/msw/dcclient.cpp
+++ b/src/msw/dcclient.cpp
@@ -29,6 +29,7 @@
 #endif
 
 #include "wx/dcclient.h"
+#include "wx/log.h"
 
 #include <windows.h>
 
@@ -98,44 +99,40 @@ static PAINTSTRUCT g_paintStruct;
 // Don't call Begin/EndPaint if it's already been called:
 // for example, if calling a base class OnPaint.
 
-WXHDC wxPaintDC::m_staticPaintHDC = 0;
-int wxPaintDC::m_staticPaintCount = 0;
+WXHDC wxPaintDC::ms_PaintHDC = 0;
+uint  wxPaintDC::ms_PaintCount = 0; // count of ms_PaintHDC usage
 
-wxPaintDC::wxPaintDC(wxWindow *the_canvas)
+wxPaintDC::wxPaintDC(wxWindow *canvas)
 {
-	if ( the_canvas && (m_staticPaintCount == 0))
-	{
-  		m_hDC = (WXHDC) ::BeginPaint((HWND) the_canvas->GetHWND(), &g_paintStruct);
-  		m_hDCCount ++;
-		m_staticPaintCount ++ ;
-		m_staticPaintHDC = m_hDC ;
-	}
-	else
-  		m_hDC = m_staticPaintHDC ;
+  wxCHECK_RET( canvas, "NULL canvas in wxPaintDC ctor" );
 
-  m_canvas = the_canvas;
-  RECT updateRect1 = g_paintStruct.rcPaint;
-  m_canvas->m_updateRect.x = updateRect1.left;
-  m_canvas->m_updateRect.y = updateRect1.top;
-  m_canvas->m_updateRect.width = updateRect1.right - updateRect1.left;
-  m_canvas->m_updateRect.height = updateRect1.bottom - updateRect1.top;
-//  m_canvas->m_paintHDC = m_staticPaintHDC ;
+  m_canvas = canvas;
+  if ( ms_PaintCount > 0 ) {
+    // it means that we've already called BeginPaint and so we must just
+    // reuse the same HDC (BeginPaint shouldn't be called more than once)
+    wxASSERT( ms_PaintHDC );
+
+    m_hDC = ms_PaintHDC;
+    ms_PaintCount++;
+  }
+  else {
+    ms_PaintHDC =
+    m_hDC = (WXHDC)::BeginPaint((HWND)m_canvas->GetHWND(), &g_paintStruct);
+    ms_PaintCount = 1;
+    m_hDCCount++;
+  }
 }
 
-wxPaintDC::~wxPaintDC(void)
+wxPaintDC::~wxPaintDC()
 {
-	m_staticPaintCount -- ;
-
-	if (m_staticPaintCount == 0)
-	{
-//  		m_canvas->m_paintHDC = 0;
-
-		if ( m_hDC && m_canvas)
-		{
-  			::EndPaint((HWND) m_canvas->GetHWND(), &g_paintStruct);
-  			m_hDCCount --;
-			m_hDC = 0;
-		}
-		m_staticPaintHDC = 0 ;
-	}
+  if ( m_hDC ) {
+    if ( !--ms_PaintCount ) {
+      ::EndPaint((HWND)m_canvas->GetHWND(), &g_paintStruct);
+      m_hDCCount--;
+      m_hDC = NULL;
+      ms_PaintHDC = NULL;
+    }
+    //else: ms_PaintHDC still in use
+  }
 }
+