layout: invalidate and recalculate, automatically

1 files changed, 25 insertions, 10 deletions

diff --git a/alf/alf.cpp b/alf/alf.cpp
index 77fe344..f914e55 100644
--- a/alf/alf.cpp
+++ b/alf/alf.cpp
@@ -75,11 +75,9 @@ ALF_UpdateFontsPriv(HWND win, ALFWindowPriv *priv)
 }
 
 void
-ALF_RecalculateLayout(HWND hwnd)
+ALF_InvalidateLayout(HWND hwnd)
 {
-    SIZE dummy;
-    SendMessage(hwnd, ALF_WM_QUERYSIZE, 0, (LPARAM)&dummy);
-    SendMessage(hwnd, ALF_WM_APPLYLAYOUT, 0, 0);
+    SendMessage(hwnd, ALF_WM_INVALIDATELAYOUT, 0, 0);
 }
 
 static void
@@ -230,11 +228,21 @@ ALF_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
         ALF_Layout_Apply(&priv->layout, hwnd);
     }
 
+    if (msg == WM_SHOWWINDOW) {
+        if (wparam)
+            ALF_Layout_Validate(&priv->layout, hwnd);
+    }
+
     if (msg == WM_GETMINMAXINFO) {
         RECT tmp;
         ZeroMemory(&tmp, sizeof(tmp));
-        tmp.right = priv->layout.totalMinWidth;
-        tmp.bottom = priv->layout.totalMinHeight;
+
+        SIZE s;
+        ZeroMemory(&s, sizeof(s));
+        ALF_Layout_GetMinSize(&priv->layout, hwnd, &s);
+
+        tmp.right = s.cx;
+        tmp.bottom = s.cy;
 
         if (ALF_Compat_AdjustWindowRectExForDpi(
                                &tmp,
@@ -259,7 +267,6 @@ ALF_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
             SendMessage(hwnd, WM_UPDATEUISTATE, MAKEWPARAM(UIS_INITIALIZE, 0), 0);
         }
         ALF_UpdateFontsPriv(hwnd, priv);
-        ALF_Layout_CalcSizes(&priv->layout, hwnd);
         ALF_Layout_Apply(&priv->layout, hwnd);
     }
 
@@ -282,15 +289,14 @@ ALF_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
 
     if (msg == WM_DPICHANGED) {
         ALF_UpdateFontsPriv(hwnd, priv);
-        ALF_Layout_CalcSizes(&priv->layout, hwnd);
+        ALF_Layout_Invalidate(&priv->layout, hwnd);
         RECT *r = (RECT*)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) {
         ALF_UpdateFontsPriv(hwnd, priv);
-        ALF_Layout_CalcSizes(&priv->layout, hwnd);
-        ALF_Layout_Apply(&priv->layout, hwnd);
+        ALF_Layout_Invalidate(&priv->layout, hwnd);
     }
 
     if (msg == DM_GETDEFID) {
@@ -318,6 +324,15 @@ ALF_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM 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
+        // windows will call WM_GETMINMAXINFO and fix it
+        if (msg == ALF_WM_VALIDATELAYOUT) {
+            RECT r;
+            if (GetWindowRect(hwnd, &r)) {
+                SetWindowPos(hwnd, NULL, r.left, r.top, r.right - r.left, r.bottom - r.top, SWP_NOACTIVATE|SWP_NOMOVE|SWP_NOOWNERZORDER|SWP_NOZORDER);
+            }
+        }
+
         return ret;
     }