Re: focus questions

[Mark Leisher <mleisher crl nmsu edu>]

    Pavel> 1. GTK_WIDGET_SET_FLAGS (myDrawingArea, GTK_CAN_FOCUS);
    Pavel> 2. gtk_widget_grab_focus(myDrawingArea);
    Pavel> 3. gtk_signal_connect(GTK_OBJECT(myDrawingArea), "key_press_event",
    Pavel> GTK_SIGNAL_FUNC(myOnKeyPress), this);

True.

    Pavel> However, this raises a few questions in my mind.  a. Is it correct
    Pavel> to think that only one widget *per window* has focus at one time?
    Pavel> b. If the window loses focus and gets it back, the same child
    Pavel> widget will have focus?  c. The command 2. will generate a focus_in
    Pavel> event?  d. Is this bad design? Is it better to have the window
    Pavel> capture the key_events and somehow redistribute them?

The mouse pointer leaving and entering a window generally does not change
focus, it simply causes enter_notify_event and leave_notify_event signals.

In your "myOnKeyPress" signal handler, if you use a keypress, return TRUE to
indicate it was used.  Otherwise return FALSE so it can be passed along to any
other object that might need it.

    Pavel> I know I could experiment but it's so much easier to ask (and the
    Pavel> respondent usually go outside the question, too :)

The easy questions will get answers, the hard ones won't.  Once you are more
familiar with GTK, you will find you have to experiment to get answers :-)
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Mark Leisher
Computing Research Lab            Cinema, radio, television, magazines are a
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