fixup transparent background work and add test in widgetfactory

Win32s bites once again with its 16bit WPARAM

1 files changed, 19 insertions, 1 deletions

diff --git a/alf/alfwindow.cpp b/alf/alfwindow.cpp
index 41d13e8..c11fede 100644
--- a/alf/alfwindow.cpp
+++ b/alf/alfwindow.cpp
@@ -197,11 +197,12 @@ ALF_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
     }
 
     if (msg == ALF_WM_SETBGCOLOR) {
-        priv->bgcolor = (ALFColor)wparam;
+        priv->bgcolor = (ALFColor)lparam;
 
         InvalidateRect(hwnd, NULL, TRUE);
 
         // fallthrough to layout, will propagate color to children
+        // and invalidate the background of transparent children
     }
 
     if (msg == ALF_WM_GETBGCOLOR) {
@@ -374,6 +375,17 @@ ALF_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
     if (msg == WM_THEMECHANGED || msg == WM_SETTINGCHANGE) {
         ALF_UpdateFontsPriv(hwnd, priv);
         ALF_Layout_Invalidate(&priv->layout, hwnd);
+        ALF_InvalidateBackground(hwnd);
+        InvalidateRect(hwnd, NULL, TRUE);
+    }
+
+    if (msg == ALF_WM_BACKGROUNDCHANGE) {
+        if (priv->bgcolor != ALF_COLOR_TRANSPARENT)
+            return 0; // nothing to do here, background is our own solid color
+
+        InvalidateRect(hwnd, NULL, TRUE);
+
+        // fallthrough to layout, will propagate to transparent children
     }
 
     if (msg == DM_GETDEFID) {
@@ -399,6 +411,12 @@ ALF_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
         return TRUE;
     }
 
+    if (msg == WM_WINDOWPOSCHANGED) {
+        if (priv->vtbl->windowposchanged) {
+            priv->vtbl->windowposchanged(priv->closure, hwnd, (WINDOWPOS *)lparam);
+        }
+    }
+
     LRESULT ret = 0;
     if (ALF_Layout_HandleMessage(&priv->layout, hwnd, msg, wparam, lparam, &ret)) {
         // if the layout was changed, our current size might be too small