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--# Label with mnemonic (hot key) which is displayed when alt is depressed.
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include GtkEngine.e

constant win = create(GtkWindow,"size=200x100,border_width=10,position=1,$destroy=Quit")

constant panel = create(GtkBox,VERTICAL)
    add(win,panel)

constant lbl = create(GtkLabel,"font=Ubuntu mono 18,markup with mnemonic=Try alt-t to _test")
    add(panel,lbl)

constant 
    btn1 = create(GtkButton,"gtk-quit","Quit"),
    btn2 = create(GtkButton,"gtk-ok","Foo"),
    box = create(GtkButtonBox)
    add(box,{btn1,btn2})	 
    pack(panel,-box)

show_all(win) -- everything but inv1 button, created below;

constant inv1 = create(GtkButton) -- button with no caption, not shown!
    connect(inv1,"clicked","Foo")
    set(lbl,"mnemonic widget",inv1)
    add(panel,inv1)

main()

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global function Foo(atom ctl)
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if ctl = btn2 then
    Info(win,,"OK button pressed")
else
    Info(win,,"Alt-t pressed")
end if
return 1
end function