Re: gnome-programming issues (canvas, dnd, & so on...)

[James Henstridge <james daa com au>]

1.
When the container is resized, a new size is allocated to it.  So you
would want to connect to the size_allocate signal.  You would also get
access to the new GtkAllocation as a parameter to the handler.

2.
To do this, I would recommend looking at an application that already does
that.  My program gnorpm is an example.  So is ghex from gnome-utils.
This is probably a bit easier than reading the full docs (which are
available in the file gtk+/docs/dnd_internals.txt

3.
Not sure about this one.

4.
or this one either.


James Henstridge.

--
Email: james@daa.com.au
WWW:   http://www.daa.com.au/~james/


On Thu, 13 May 1999, Andrea Bosio wrote:

> Hi.
> 
> I have some gnome-programming question for my app (Electric Ears).
> 
> 1.
> Resizing.
> How can I check when a container is resized?
> Maybe a signal is emitted, but i can't find any docs about it...
> In my case I have a canvas that, when the window (or the frame) containing
> it is resized, I would like to be zoomed in and out properly.
> 
> 2.
> Drag and Drop.
> How drag and drop is managed? I would like to have something like
> this: the user drag a wave file from GMC to my app and my app opens
> it.
> Are there any docs about this?
> 
> 3.
> About MDI.
> I have some problems switching from modal to toplevel and from 
> toplevel to modal.
> Maybe it's a bug in MDI stuff, in fact also gTop has some problems
> switching betweend MDI modes.
> I'm using gnome libs 1.0.9 and gtop 1.0.1 from debian packages.
> 
> 4.
> Canvas.
> I have some problems with some canvas items (lines), that when I move
> another line on them, and then I move away the line from them, they
> are no more visible. But, if I put another item under them (a rectangle)
> they re-appear.
> If you want an example, download Electric Ears, open a sample, click on
> "play" and watch at the disappear of time markings. Then select
> a region containing the marks "deleted": they re-appear!
> 
> -- 
> Ciao, Andrea