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Adjust win32 title menu to disable options when ShowAsDialog = true

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amwx
2026-05-23 12:04:07 -04:00
parent f60c1bec05
commit 98d5e95583
1 changed files with 11 additions and 8 deletions
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src/FluentAvalonia/UI/Windowing/Win32/Win32WindowManager.cs
+11 -8
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@@ -70,6 +70,7 @@ internal unsafe class Win32WindowManager
{
var sysMenu = GetSystemMenu((HWND)Hwnd, false);
bool isMax = _window.WindowState == WindowState.Maximized;
bool isDialog = _window.ShowAsDialog;
var mii = new MENUITEMINFO
{
@@ -78,18 +79,20 @@ internal unsafe class Win32WindowManager
fState = MFS_ENABLED
};
// Always enabled
SetMenuItemInfo(sysMenu, (uint)SC_MINIMIZE, false, &mii);
SetMenuItemInfo(sysMenu, (uint)SC_CLOSE, false, &mii);
SetMenuItemInfo(sysMenu, SC_CLOSE, false, &mii);
mii.fState = (uint)(isDialog ? MFS_DISABLED : MFS_ENABLED);
SetMenuItemInfo(sysMenu, SC_MINIMIZE, false, &mii);
// Restore only enabled if maximized
mii.fState = (uint)(isMax ? MFS_ENABLED : MFS_DISABLED);
SetMenuItemInfo(sysMenu, (uint)SC_RESTORE, false, &mii);
mii.fState = (uint)((isMax && !isDialog) ? MFS_ENABLED : MFS_DISABLED);
SetMenuItemInfo(sysMenu, SC_RESTORE, false, &mii);
// Only available if normal state
mii.fState = (uint)(isMax ? MFS_DISABLED : MFS_ENABLED);
SetMenuItemInfo(sysMenu, (uint)SC_MOVE, false, &mii);
SetMenuItemInfo(sysMenu, (uint)SC_SIZE, false, &mii);
SetMenuItemInfo(sysMenu, (uint)SC_MAXIMIZE, false, &mii);
mii.fState = (uint)((isMax || isDialog) ? MFS_DISABLED : MFS_ENABLED);
SetMenuItemInfo(sysMenu, SC_MOVE, false, &mii);
SetMenuItemInfo(sysMenu, SC_SIZE, false, &mii);
SetMenuItemInfo(sysMenu, SC_MAXIMIZE, false, &mii);
SetMenuDefaultItem(sysMenu, uint.MaxValue, 0);