【resolved】maui TrayIcon with ContextMenuStrip not close when app lose focus （windows）

Question

【resolved】maui TrayIcon with ContextMenuStrip not close when app lose focus （windows）

zd yu 41 MVP

i am learning maui.

https://github.com/yuzd/maui_chatgpt/blob/master/chatgpt/Platforms/Windows/NativeWindowing/WindowMessageSink.cs#L193-L250

The above source code shows the tray icon with menu created by winapi.

How to close this menu in response to mouse click events（any click include from other apps）

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Rob Caplan 6,127 Reputation points Microsoft Employee Moderator

2022-12-12T17:51:49.913+00:00

Added windows-api tag since the question is about using the windows API not about using MAUI.
For help specifically with that repo you'll need to ask the owner.

From a quick skim of the repo it looks like you're showing the menu via TrackPopupMenu. As documented, this requires that it's called from the foreground thread to properly dismiss on clicks.

See the Remarks section for TrackPopupMenu in the Win32 documentation.

To display a context menu for a notification icon, the current window must be the foreground window before the application calls TrackPopupMenu or TrackPopupMenuEx. Otherwise, the menu will not disappear when the user clicks outside of the menu or the window that created the menu (if it is visible). If the current window is a child window, you must set the (top-level) parent window as the foreground window.
However, when the current window is the foreground window, the second time this menu is displayed, it appears and then immediately disappears. To correct this, you must force a task switch to the application that called TrackPopupMenu. This is done by posting a benign message to the window or thread, as shown in the following code sample:

SetForegroundWindow(hDlg);

// Display the menu
TrackPopupMenu( hSubMenu,
TPM_RIGHTBUTTON,
pt.x,
pt.y,
0,
hDlg,
NULL);

PostMessage(hDlg, WM_NULL, 0, 0);

1 answer

Your answer

Rob Caplan 6,127 Reputation points Microsoft Employee Moderator

2022-12-12T17:51:49.913+00:00

Added windows-api tag since the question is about using the windows API not about using MAUI.
For help specifically with that repo you'll need to ask the owner.

From a quick skim of the repo it looks like you're showing the menu via TrackPopupMenu. As documented, this requires that it's called from the foreground thread to properly dismiss on clicks.

See the Remarks section for TrackPopupMenu in the Win32 documentation.

To display a context menu for a notification icon, the current window must be the foreground window before the application calls TrackPopupMenu or TrackPopupMenuEx. Otherwise, the menu will not disappear when the user clicks outside of the menu or the window that created the menu (if it is visible). If the current window is a child window, you must set the (top-level) parent window as the foreground window.
However, when the current window is the foreground window, the second time this menu is displayed, it appears and then immediately disappears. To correct this, you must force a task switch to the application that called TrackPopupMenu. This is done by posting a benign message to the window or thread, as shown in the following code sample:

SetForegroundWindow(hDlg);

// Display the menu
TrackPopupMenu( hSubMenu,
TPM_RIGHTBUTTON,
pt.x,
pt.y,
0,
hDlg,
NULL);

PostMessage(hDlg, WM_NULL, 0, 0);

Answer 1

zd yu 41 MVP

SetForegroundWindow(hDlg);  
  
// Display the menu  
TrackPopupMenu( hSubMenu,  
TPM_RIGHTBUTTON,  
pt.x,  
pt.y,  
0,  
hDlg,  
NULL);  
  
PostMessage(hDlg, WM_NULL, 0, 0);

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【resolved】maui TrayIcon with ContextMenuStrip not close when app lose focus （windows）

1 answer

Your answer