TButton action trigger

[jordiperezartigues]

When i have a TButton with id different than cmOK, cmCancel

dlg->insert(new TButton(TRect(2,2,14,4), "Add Mesh", cmNew, bfNormal));`

How do i do to trigger the button pressed?, when cmNew is not returning from the tdesktop->execView(dlg)

[magiblot]

Hola, Jordi! Bon any nou!

TDialogs receive evCommand events when buttons are pressed. However, cmOK, cmCancel, cmYes and cmNo are a special case because TDialog implements the following logic for them, which causes execView to return immediately with the triggered command as a result:

tvision/source/tvision/tdialog.cpp

Lines 77 to 91 in 423aeb5

	case evCommand:
	switch( event.message.command )
	{
	case cmOK:
	case cmCancel:
	case cmYes:
	case cmNo:
	if( (state & sfModal) != 0 )
	{
	endModal(event.message.command);
	clearEvent(event);
	}
	break;
	}
	break;

That's the reason why you are observing a different behaviour for these commands.

In order to do the same for other commands, you need to create your custom class inheriting from TDialog and override the handleEvent method. You then have to replicate the logic above but for the commands you are interested in, like cmNew. For example:

void TMyDialog::handleEvent(TEvent& event)
{
    TDialog::handleEvent(event);
    if (event.what == evCommand)
    {
        switch (event.message.command)
        {
            case cmNew:
            // case ...:
                if ((state & sfModal) != 0)
                {
                    endModal(event.message.command);
                    clearEvent(event);
                }
                break;
        }
    }
}

Or you can omit the switch and have all commands returned by execView, as long as they were not handled already by the call to the superclass's method TDialog::handleEvent.