forward WM_SETTINGCHANGE and WM_SYSCOLORCHANGE to controls

2 files changed, 24 insertions, 3 deletions

diff --git a/alf/alflayout.cpp b/alf/alflayout.cpp
index 745b303..ba2854b 100644
--- a/alf/alflayout.cpp
+++ b/alf/alflayout.cpp
@@ -1056,6 +1056,28 @@ ALF_Layout_HandleMessage(ALFLayout *layout, HWND hwnd, UINT msg, WPARAM wparam,
         return TRUE;
     }
 
+    if (msg == WM_SYSCOLORCHANGE) {
+        // forward to children
+        ALF_FOR_LIST(ALFControlPriv, list, &layout->controls, c) {
+            SendMessage(c->hwnd, WM_SYSCOLORCHANGE, wparam, lparam);
+        }
+
+        return FALSE;
+    }
+
+    if (msg == WM_SETTINGCHANGE) {
+        // Controls could technically figure out if their layout parameters
+        // have changed, but that is not easy so nobody would bother anyway.
+        ALF_Layout_Invalidate(layout, hwnd);
+
+        // forward to children
+        ALF_FOR_LIST(ALFControlPriv, list, &layout->controls, c) {
+            SendMessage(c->hwnd, WM_SETTINGCHANGE, wparam, lparam);
+        }
+
+        return FALSE;
+    }
+
     if (msg == ALF_WM_SETBGCOLOR) {
         *pRet = 1;
         if (layout->bgcolor == (ALFColor)lparam)
diff --git a/alf/alftoplevel.cpp b/alf/alftoplevel.cpp
index e2d2f64..5cdd686 100644
--- a/alf/alftoplevel.cpp
+++ b/alf/alftoplevel.cpp
@@ -397,10 +397,9 @@ ALF_Toplevel_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
         SetWindowPos(hwnd, NULL, r->left, r->top, r->right-r->left, r->bottom-r->top, SWP_NOACTIVATE|SWP_NOZORDER);
     }
 
-    if (msg == WM_THEMECHANGED || msg == WM_SETTINGCHANGE) {
+    if (msg == WM_THEMECHANGED || msg == WM_SETTINGCHANGE || msg == WM_SYSCOLORCHANGE) {
         ALF_Toplevel_HandleDpiOrSettingsChange(hwnd, priv);
-        ALF_InvalidateLayout(hwnd);
-        ALF_InvalidateBackground(hwnd);
+        ALF_InvalidateBackground(hwnd); // might be a system color, or theme stuff or whatever
         InvalidateRect(hwnd, NULL, TRUE);
     }