RE: [gtkmm] 3 states check box

[Murray Cumming Comneon com]

This question seems more appropriate for a GTK+ list.

Murray Cumming
murrayc usa net
www.murrayc.com 

> -----Original Message-----
> From: Daniel Bausch [mailto:DanielBausch gmx de] 
> Sent: Dienstag, 25. März 2003 16:59
> To: Paul Scheremet
> Cc: gtkmm-list gnome org
> Subject: Re: [gtkmm] 3 states check box
> 
> 
> Hello!
> 
> Am Tuesday, 25. March 2003 10:34 schrieb Paul Scheremet:
> > I've never seen a "three-state" check box in any gui.
> 
> I do not know any solution for thr problem, but the Windows 
> GUI and also Qt 
> contains such a three-state check box. See properties dialog 
> of multiple 
> files with different attributes. I would expect that, the 
> normal gtk checkbox 
> has an option to make it a three state. In Windows, I know 
> that this option 
> is part of the API, in Qt I do not know, if the KDE 
> programmers implemented 
> the feature on their own.
> From my point of view, there are single cases where such an 
> checkbox is of 
> use. I would not use it, when only checked or unchecked is a 
> valid input. 
> Then I prefer to set a default state. In the properties 
> dialog mentioned 
> above, the undefined state means that the attribute of that 
> type shall not be 
> touched, because if you set it to checked or unchecked, every 
> selected file 
> will receive that attribute and that's not ever what you 
> want, but it shall 
> be possible to remove the read-only-state of multiple files, 
> while not 
> affecting the other attributes.
> (This is only meant as an example, where such a control is of 
> good use.)
> 
> Daniel Bausch
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