Trigger action on submenu?

[JnLlnd]

I would think it is not possible but you never know what you can discover until you as a question on this forum

When a menu has submenus, is it possible to trigger an action only when a submenu is opened? For example, refreshing this submenu?

[Synetech]

I tried creating a subroutine label that matches the name of the submenu (with and without the prepended colon), but while AHK did not complain, it also did nothing when the submenu is opened.

Code: Select all

Menu, SubMenu, Add, Foo, SubMenuItem
Menu, Tray, Add, ..., :SubMenu

MsgBox, Test now...
return

SubMenuItem:
	MsgBox, Submenu item clicked
return

SubMenu:
:SubMenu:
	MsgBox, Submenu opened
return

[JnLlnd]

Good try :-) Thanks for this.

[guest3456]

I would think it is not possible but you never know what you can discover until you as a question on this forum

When a menu has submenus, is it possible to trigger an action only when a submenu is opened? For example, refreshing this submenu?

it may be possible:
https://msdn.microsoft.com/en-us/librar ... u_messages

When the user points to a menu item that opens a submenu, the system sends the owner window the WM_INITMENUPOPUP message before displaying the submenu. This message gives the application an opportunity to modify the submenu before it is displayed.

[guest3456]

^hmmm i can't get it to work

Code: Select all

OnMessage(0x117, "WM_INITMENUPOPUP")

Menu, MyMenu, Add, Item1, MenuHandler
Menu, MyMenu, Add, Item2, MenuHandler
Menu, MyMenu, Add
Menu, Submenu1, Add, Item1, MenuHandler
Menu, Submenu1, Add, Item2, MenuHandler
Menu, MyMenu, Add, My Submenu, :Submenu1
Menu, MyMenu, Add
Menu, MyMenu, Add, Item3, MenuHandler
return

MenuHandler:
   MsgBox You selected %A_ThisMenuItem% from the menu %A_ThisMenu%.
return


#z::Menu, MyMenu, Show


WM_INITMENUPOPUP(a,b,c,d)
{
   msgbox, opened
}

[guest3456]

more discussion:

https://autohotkey.com/boards/viewtopic.php?t=18777

it works:

Code: Select all

Menu, FileMenu, Add, &Open`tCtrl+O, GuiClose
Menu, FileMenu, Add, E&xit, GuiClose
Menu, HelpSubMenu, Add, SubItem, GuiClose
Menu, HelpMenu, Add, &About, GuiClose
Menu, HelpMenu, Add, SubMenu, :HelpSubMenu
Menu, MyMenuBar, Add, &File, :FileMenu
Menu, MyMenuBar, Add, &Help with submenu, :HelpMenu
Gui, Menu, MyMenuBar

Gui, Show, w400 h300, Title
 
OnMessage(0x211, "WM_ENTERMENULOOP")
OnMessage(0x117, "WM_INITMENUPOPUP")
return
 
GuiClose:
GuiEscape:
   ExitApp
return

WM_INITMENUPOPUP(wParam, lParam, msg, hwnd) {
   MouseGetPos, x, y
   ToolTip, %wParam%`n%lParam%`n%msg%`n%hwnd%, x+200, y+200
}
 
WM_ENTERMENULOOP(){
   Return 100
}

[JnLlnd]

So, this works when the menu is attached to a Gui. But, from what I've read from the links you posted, not for a standalone menu. Interesting.

[just me]

It is possible.

[JnLlnd]

Yes, you are right. But risky, as explained lexikos. Enough risky for me to exclude this option.