In a 32-bit Delphi 11 VCL Application on Windows 10, when RIGHT-CLICKING any menu item, I need to get the name of the clicked MenuItem.

I use a TApplicationEvents component and this code to get notified when I click on any menu item:

procedure TformMain.ApplicationEvents1Message(var Msg: tagMSG; var Handled: Boolean);
begin
  case Msg.message of
    Winapi.Messages.WM_COMMAND:
      begin
        CodeSite.Send('TformMain.ApplicationEvents1Message: WM_COMMAND');
      end;
  end;
end;

However:

1. How to get notified only when RIGHT-clicking the menu item?

2. How to get the NAME of the clicked MenuItem?

CodePudding user response：

Each TMenu (i.e. TMainMenu or TPopupMenu) offers a method FindItem, which allows you to find an item by varying criteria. In your case the correct call for the form's main menu would be

TheMenuItem := Menu.FindItem(Msg.wParam, fkCommand);

CodePudding user response：

Since I have several forms in my application and several (popup) menus on each of these forms, a special solution is needed here:

procedure TForm1.ApplicationEvents1Message(var Msg: tagMSG; var Handled: Boolean);
begin
  case Msg.message of
      Winapi.Messages.WM_COMMAND:
      begin
        // Todo: Check HERE for RightMouseButtonDown - BUT HOW? (Or how to check HERE for modifier keys?)

        var ThisMenuItem := GetMenuItem(Msg.wParam);
        if Assigned(ThisMenuItem) then
        begin
          CodeSite.Send('TForm1.ApplicationEvents1Message: Clicked MenuItem Name', ThisMenuItem.Name);
        end;

      end;
  end;
end;

function TForm1.GetMenuItem(const aWParam: NativeUInt): TMenuItem;
var
  ThisMenuItem: TMenuItem;
begin
  Result := nil;
  var ThisForm := Screen.ActiveForm; // works on any form in the application
  for var i := 0 to ThisForm.ComponentCount - 1 do
  begin
    if ThisForm.Components[i] is TMenu then
    begin
      ThisMenuItem := TMenu(ThisForm.Components[i]).FindItem(aWParam, fkCommand);
      if Assigned(ThisMenuItem) then
      begin
        Result := ThisMenuItem;
        EXIT;
      end;
    end;
  end;
end;

Any optimizations?

And what I still need: How to check RightMouseButtonDown or modifier keys inside the WM_COMMAND message handler?