Make notebook bg gradient work. Anti-flicker work throughout the codebase.

1 files changed, 22 insertions, 8 deletions

diff --git a/alf/alfpanel.cpp b/alf/alfpanel.cpp
index 8583d2e..b8ef8b3 100644
--- a/alf/alfpanel.cpp
+++ b/alf/alfpanel.cpp
@@ -18,6 +18,13 @@ ALF_Panel_ClearPriv(ALFPanelPriv *priv)
     ALF_Layout_Clear(&priv->layout);
 }
 
+static void
+ALF_Panel_Paint(ALFPanelPriv *priv, HWND hwnd, HDC dc, RECT *r)
+{
+    (void)priv;
+    ALF_Compat_DrawThemeParentBackground(hwnd, dc, r);
+}
+
 static LRESULT WINAPI
 ALF__PanelWindowProc(HWND window, UINT msg, WPARAM wparam, LPARAM lparam)
 {
@@ -38,15 +45,28 @@ ALF__PanelWindowProc(HWND window, UINT msg, WPARAM wparam, LPARAM lparam)
     }
 
     if (msg == WM_ERASEBKGND) {
-        HDC hdc = (HDC)wparam;
+        return TRUE;
+    }
 
+    if (msg == WM_PRINTCLIENT) {
         RECT r = { 0, 0, 0, 0 };
         GetClientRect(window, &r);
-        ALF_Compat_DrawThemeParentBackground(window, hdc, &r);
 
+        ALF_Panel_Paint(priv, window, (HDC)wparam, &r);
         return TRUE;
     }
 
+    if (msg == WM_PAINT) {
+        PAINTSTRUCT ps;
+        HDC dc = BeginPaint(window, &ps);
+
+        ALF_Panel_Paint(priv, window, dc, &ps.rcPaint);
+
+        EndPaint(window, &ps);
+
+        return 0;
+    }
+
     if (ALF_ShouldMessageBubble(window, msg, wparam, lparam))
         return SendMessage(GetParent(window), msg, wparam, lparam);
 
@@ -72,12 +92,6 @@ ALF_RegisterPanelClass(void)
 
     cls.hInstance = ALF_HINSTANCE;
     cls.hCursor = LoadCursor(NULL, (LPTSTR)IDC_ARROW);
-    if (LOBYTE(LOWORD(GetVersion())) >= 4) {
-        cls.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
-    } else {
-        // NT 3.x has white dialog backgrounds
-        cls.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
-    }
     cls.lpszClassName = classNameBuf;
     cls.cbWndExtra = sizeof(void*);
     cls.lpfnWndProc = ALF__PanelWindowProc;