Mega Code Archive
Check if a popup menu is open
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{
Using the WM_MENUSELECT message of the form won’t work to check if
the popup is open. Simply because the parent of the popup is not the
form (check the popup method of TPopupMenu). A workaround is to use
the api call yourself :
}
type
TForm1 = class(TForm)
{...}
procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
private
IsMenuOpen: Boolean;
procedure WMMENUSELECT(var msg: TWMMENUSELECT); message WM_MENUSELECT;
end;
{...}
implementation
{...}
procedure TForm1.WMMENUSELECT(var msg: TWMMENUSELECT);
begin
inherited;
IsMenuOpen := not ((msg.MenuFlag and $FFFF > 0) and
(msg.Menu = 0));
end;
procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
if Button = mbRight then
with ClientToScreen(Point(X, Y)) do
TrackPopupMenuEx(PopupMenu1.Handle, TPM_LEFTALIGN, X, Y,
Self.Handle, nil);
end;
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