Re: Closing windows properly.

On 05/26/13 14:14, Tristan Van Berkom wrote:
> On Sun, May 26, 2013 at 5:30 PM, dE<[email protected]>  wrote:
>> On 05/26/13 12:46, Tristan Van Berkom wrote:
>>> On Sun, May 26, 2013 at 4:04 PM, dE<[email protected]>  wrote:
>>>> I happens that whenever I get a window opened, and then I close it (no
>>>> signal associated with close), and then again if that windows is opened,
>>>> all
>>>> I get is a small blank window.
>>>>
>>>> I doubt this's cause the window is not closed properly (default handler
>>>> is
>>>> not good enough).
>>>>
>>>> So what should be done? Thanks for the help!
>>> I don't exactly understand what is going wrong... but if you want to
>>> handle
>>> the event where a window is closed, you should handle the "delete-event"
>>> signal on your window:
>>>
>>>
>>> https://developer.gnome.org/gtk3/unstable/GtkWidget.html#GtkWidget-delete-event
>>>
>>> Cheers,
>>>       -Tristan
>>>
>>>
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>> You mean this shouldn't happen?
> No, I mean I have no idea what it is that is happening, I'm just guessing
> that you need to receive an event for closing a window.
>
>> Even if I do not have any event related to
>> closing of the window,
> You do have an event, it's "delete-event", only that you are not
> handling that event.
>
>> it should appear again if the same function is
>> evoked? Here's the code --
>>
>> void msgs (char *msg) {
>>      GtkWidget *msg_window;
>>      msg_window = GTK_WIDGET(gtk_builder_get_object( build_object, "dialog1"
>> ));
>>      gtk_label_set_text_with_mnemonic ( detect_object ("label3"), msg );
>>      gtk_widget_show ( msg_window );
>> }
> No, if the 'msg_window' here is closed, the default behaviour for the
> 'delete-event'
> is to call gtk_widget_destroy(), so it will not exist again.
>
> If you want to reuse it, you should handle the 'delete-event' signal
> and return TRUE
> from there (and probably call gtk_widget_hide() to hide the window
> when it's deleted).
>
>> I'm using the same build object as for the main window of the application.
> You can do that but I would recommend you split up your glade file into multiple
> files.
>
> Also I would recommend you get rid of the GtkBuilder object directly after
> using it.
>
>> If this function is evoked more than twice in a single run, all windows
>> except the 1st one will open properly, all subsequent windows will be blank.
> That's correct, because once you close the window it's destroyed, unless
> you override that behaviour by handling the 'delete-event' signal.
>
> Common practice is also to just rebuild the dialog from it's own glade file
> whenever you need it.
>
> Cheers,
>      -Tristan

I rebuild, and it works. Thanks!

Another question --

How do I get a list of default handlers? Cause I'm trying to close a 
window (msg_window) with push of a button, but --

gboolean close_window ( GtkWidget *temp , GdkEvent  *event, gpointer 
*target ) {
     gtk_widget_destroy ( GTK_WIDGET( target ) );
}

Doesn't help.
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