1 files changed, 26 insertions, 28 deletions

diff --git a/iup/src/win/iupwin_canvas.c b/iup/src/win/iupwin_canvas.c
index bb88b8a..b865160 100755
--- a/iup/src/win/iupwin_canvas.c
+++ b/iup/src/win/iupwin_canvas.c
@@ -45,7 +45,7 @@ static void winCanvasSetScrollInfo(HWND hWnd, int imin, int imax, int ipos, int
 static int winCanvasSetBgColorAttrib(Ihandle *ih, const char *value)
 {
   (void)value;
-  iupdrvDisplayUpdate(ih);
+  iupdrvPostRedraw(ih);
   return 1;
 }
 
@@ -220,7 +220,7 @@ static void winCanvasUpdateHorScroll(Ihandle* ih, WORD winop)
   xmax = iupAttribGetFloat(ih,"XMAX");
   xmin = iupAttribGetFloat(ih,"XMIN");
 
-  winCanvasGetScrollInfo(ih->handle, &iposx, &ipagex, SB_HORZ, winop==SB_THUMBTRACK? 1: 0);
+  winCanvasGetScrollInfo(ih->handle, &iposx, &ipagex, SB_HORZ, winop==SB_THUMBTRACK||winop==SB_THUMBPOSITION? 1: 0);
 
   if (!iupAttribGet(ih,"LINEX"))
   {
@@ -296,7 +296,7 @@ static void winCanvasUpdateVerScroll(Ihandle* ih, WORD winop)
   ymax = iupAttribGetFloat(ih,"YMAX");
   ymin = iupAttribGetFloat(ih,"YMIN");
 
-  winCanvasGetScrollInfo(ih->handle, &iposy, &ipagey, SB_VERT, winop==SB_THUMBTRACK? 1: 0);
+  winCanvasGetScrollInfo(ih->handle, &iposy, &ipagey, SB_VERT, winop==SB_THUMBTRACK||winop==SB_THUMBPOSITION? 1: 0);
 
   if (!iupAttribGet(ih, "LINEY"))
   {
@@ -372,6 +372,10 @@ static int winCanvasProc(Ihandle* ih, UINT msg, WPARAM wp, LPARAM lp, LRESULT *r
       GetClientRect(ih->handle, &rect); 
       FillRect(hdc, &rect, iupwinBrushGet(color)); 
     }
+    else
+      InvalidateRect(ih->handle,NULL,FALSE);  /* This will invalidate all area. 
+                                                 Necessary in XP, or overlapping windows will have the effect of partial redrawing. */
+
     /* always return non zero value */
     *result = 1;
     return 1; 
@@ -382,7 +386,7 @@ static int winCanvasProc(Ihandle* ih, UINT msg, WPARAM wp, LPARAM lp, LRESULT *r
       {
         PAINTSTRUCT ps;
         HDC hdc = BeginPaint(ih->handle, &ps);
-        iupAttribSetStr(ih, "HDC_WMPAINT", (char*)&hdc);
+        iupAttribSetStr(ih, "HDC_WMPAINT", (char*)hdc);
         iupAttribSetStrf(ih, "CLIPRECT", "%d %d %d %d", ps.rcPaint.left, ps.rcPaint.top, ps.rcPaint.right-ps.rcPaint.left, ps.rcPaint.bottom-ps.rcPaint.top);
 
         cb(ih, ih->data->posx, ih->data->posy);
@@ -542,27 +546,13 @@ static int winCanvasProc(Ihandle* ih, UINT msg, WPARAM wp, LPARAM lp, LRESULT *r
     return iupwinBaseProc(ih, msg, wp, lp, result);
 }
 
-static void winCanvasRegisterClass(void)
-{
-  WNDCLASS wndclass;
-  ZeroMemory(&wndclass, sizeof(WNDCLASS));
-  
-  wndclass.hInstance      = iupwin_hinstance;
-  wndclass.lpszClassName  = "IupCanvas";
-  wndclass.lpfnWndProc    = (WNDPROC)iupwinBaseWinProc;
-  wndclass.hCursor        = LoadCursor(NULL, IDC_ARROW);
-  wndclass.style          = CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW; /* using CS_OWNDC will minimize the work of cdActivate in the CD library */
-  wndclass.hbrBackground  = NULL;  /* remove the background to optimize redraw */
-   
-  RegisterClass(&wndclass);
-}
-
 static int winCanvasMapMethod(Ihandle* ih)
 {
   CLIENTCREATESTRUCT clientstruct;
   void *clientdata = NULL;
   char *classname;
-  DWORD dwStyle = WS_CHILD, dwExStyle = 0;
+  DWORD dwStyle = WS_CHILD|WS_CLIPSIBLINGS, 
+      dwExStyle = 0;
 
   if (!ih->parent)
     return IUP_ERROR;
@@ -574,14 +564,7 @@ static int winCanvasMapMethod(Ihandle* ih)
   }
                            
   if (ih->firstchild) /* can be a container */
-  {
-    dwStyle |= WS_CLIPSIBLINGS;
-
-    if (iupAttribGetBoolean(IupGetDialog(ih), "COMPOSITED"))
-      dwExStyle |= WS_EX_COMPOSITED;
-    else
-      dwStyle |= WS_CLIPCHILDREN;
-  }
+    iupwinGetNativeParentStyle(ih, &dwExStyle, &dwStyle);
                            
   if (iupAttribGetBoolean(ih, "MDICLIENT"))  
   {
@@ -693,6 +676,21 @@ static void winCanvasReleaseMethod(Iclass* ic)
     UnregisterClass("IupCanvas", iupwin_hinstance);
 }
 
+static void winCanvasRegisterClass(void)
+{
+  WNDCLASS wndclass;
+  ZeroMemory(&wndclass, sizeof(WNDCLASS));
+  
+  wndclass.hInstance      = iupwin_hinstance;
+  wndclass.lpszClassName  = "IupCanvas";
+  wndclass.lpfnWndProc    = (WNDPROC)iupwinBaseWinProc;
+  wndclass.hCursor        = LoadCursor(NULL, IDC_ARROW);
+  wndclass.style          = CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW; /* using CS_OWNDC will minimize the work of cdActivate in the CD library */
+  wndclass.hbrBackground  = NULL;  /* remove the background to optimize redraw */
+   
+  RegisterClass(&wndclass);
+}
+
 void iupdrvCanvasInitClass(Iclass* ic)
 {
   if (!iupwinClassExist("IupCanvas"))