Re: [gtk-list] Main Window References Dialog Window(or vica versa)?
- From: "Emmanuel DELOGET" <logout free fr>
- To: <gtk-list redhat com>
- Subject: Re: [gtk-list] Main Window References Dialog Window(or vica versa)?
- Date: Wed, 8 Mar 2000 01:16:14 +0100
From: George Deprez <firstname.lastname@example.org>
> Hello All,
> I have a window which creates and pops up a dialog with an entry.
> When the OK button is pressed the callback obtains the entry
> data and MUST update data in the main window.
> What is the best way to exchange information between windows.
> Is there a way to get any top_level window by name?
By name ? What do you mean here ?
> I want to minimize the use of globals.
> How about using object_set_data( Window1, "window2", window2);
That's fine. You should read the related FAQ
questions for more information on this subject.
> Am I wasting alot of memory doing this?
Unless you develop some specific application for
some limited memory machine, I suppose you can
assume that the users of your program have more
than 256KB of RAM.
An BTW, it does not eat too much memory :)
(roughly : the datalist - the underlying
structure - will allocated some memory to
copy the name of your data object and to
handle the list of all your datas. Not
a terrible issue).
As a side note, you should notice that
using a lot of memory is not really a big problem
on today's machine. I may be wrong, but I think
that limitating a GUI based software in order
to have it running on deprecated machine is
just a waste of energy and time.
> Will I lose the data when a window is destroyed?
Er... If you allocated some datas, I do not
think they will be destroyed (unless you
use object_set_data_full() to provide the
correct dtor function.
But if you do not care, you'll loose the
pointers and this will probably result in
some memory leaks.
> Also, a side question -------------------------------
> How can I disable the destroy button on a dialog window?
> I want to force the users to use the OK and CANCEL buttons.
You should have a look to gtk_window_set_functions()
- note that this will require a WM which support
WM hints requests.
> Any help appreciated.
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