From 125af16c9bc35d7620aa9089ebe668e6e484be71 Mon Sep 17 00:00:00 2001
From: Giannis Adamopoulos <gadamopoulos@reactos.org>
Date: Sat, 14 May 2011 19:01:50 +0000
Subject: [PATCH] [uxtheme] - Begin implementing handling WM_NCPAINT - Evert
 time a draw operation is performed on the non client area, a DRAW_CONTEXT
 will be initialised in order to keep most used information about the drawing
 opoeration

svn path=/branches/GSoC_2011/ThemesSupport/; revision=51746
---
 dll/win32/uxtheme/nonclient.c | 100 ++++++++++++++++++++++++++++------
 1 file changed, 82 insertions(+), 18 deletions(-)

diff --git a/dll/win32/uxtheme/nonclient.c b/dll/win32/uxtheme/nonclient.c
index 87ecff462fe..8373b211c31 100644
--- a/dll/win32/uxtheme/nonclient.c
+++ b/dll/win32/uxtheme/nonclient.c
@@ -6,17 +6,8 @@
  * PROGRAMMER:      Giannis Adamopoulos
  */
  
-
-
-#include "config.h"
-
-#include <stdlib.h>
-#include <stdarg.h>
-
-#include "windef.h"
-#include "winbase.h"
-#include "winuser.h"
-#include "wingdi.h"
+#include <windows.h>
+#include "undocuser.h"
 #include "vfwmsgs.h"
 #include "uxtheme.h"
 
@@ -24,15 +15,88 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(uxtheme);
 
+typedef struct _DRAW_CONTEXT
+{
+    HWND hWnd;
+    HDC hDC;
+    HTHEME theme; 
+    WINDOWINFO wi;
+    HRGN hRgn;
+} DRAW_CONTEXT, *PDRAW_CONTEXT;
+
+static void
+ThemeInitDrawContext(PDRAW_CONTEXT pcontext,
+                     HWND hWnd,
+                     HRGN hRgn)
+{
+    GetWindowInfo(hWnd, &pcontext->wi);
+    pcontext->hWnd = hWnd;
+    pcontext->theme = OpenThemeData(pcontext->hWnd,  L"WINDOW");
+
+    if(hRgn <= 0)
+    {
+        hRgn = CreateRectRgnIndirect(&pcontext->wi.rcWindow);
+        pcontext->hRgn = hRgn;
+    }
+    else
+    {
+        pcontext->hRgn = 0;
+    }
+
+    pcontext->hDC = GetDCEx(hWnd, hRgn, DCX_WINDOW | DCX_INTERSECTRGN | DCX_USESTYLE | DCX_KEEPCLIPRGN);
+}
+
+static void
+ThemeCleanupDrawContext(PDRAW_CONTEXT pcontext)
+{
+    ReleaseDC(pcontext->hWnd ,pcontext->hDC);
+
+    CloseThemeData (pcontext->theme);
+
+    if(pcontext->hRgn != NULL)
+    {
+        DeleteObject(pcontext->hRgn);
+    }
+}
+
+/*
+    Message handlers
+ */
+
+static void 
+ThemePaintWindow(PDRAW_CONTEXT pcontext, RECT* prcCurrent)
+{
+    UNIMPLEMENTED;
+}
+
+static LRESULT 
+ThemeHandleNCPaint(HWND hWnd, HRGN hRgn)
+{
+    DRAW_CONTEXT context;
+    RECT rcCurrent;
+
+    ThemeInitDrawContext(&context, hWnd, hRgn);
+
+    rcCurrent = context.wi.rcWindow;
+    OffsetRect( &rcCurrent, -context.wi.rcWindow.left, -context.wi.rcWindow.top);
+
+    ThemePaintWindow(&context, &rcCurrent);
+    ThemeCleanupDrawContext(&context);
+
+    return 0;
+}
 
 LRESULT CALLBACK 
 ThemeWndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam, WNDPROC DefWndProc)
 {
-    UNIMPLEMENTED;
-
-    /* Some test */
-    if(Msg == WM_NCPAINT || Msg == WM_NCACTIVATE)
-        return FALSE;
-
-    return DefWndProc(hWnd, Msg, wParam, lParam);
+    switch(Msg)
+    {
+    case WM_NCPAINT:
+        return ThemeHandleNCPaint(hWnd, (HRGN)wParam);
+    case WM_NCACTIVATE:
+        ThemeHandleNCPaint(hWnd, (HRGN)1);
+        return TRUE;
+    default:
+        return DefWndProc(hWnd, Msg, wParam, lParam);
+    }
 }