Re: Difference between Gtk2 and Gtk3 output

[Tristan Van Berkom <tvb gnome org>]

Hi,

This is a curious situation, You should not have to be using
hard coded sizes here in order to share the space.

The main difference I think you are facing is that a scrolled
window requests a natural height of it's content but a minimum
hight of 0 (or the height required for a horizontal scrollbar).

One thing I dont understand, is why you have a viewport
outside of a scrolled window, what is that intended to do ?

Certainly, the viewport requires all the vertical space and
so none is left over for the scrolled window below (how
would that be unexpected ?).

Cheers,
         -Tristan

On Sat, Feb 16, 2013 at 8:26 PM, HW Krus <hwkrus gmail com> wrote:
> Thanks!
>
> Looks like somehow the scrolled_window widget messes up its dimensions.
>
> Using size_request:
>
>   vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 5);
>   gtk_widget_set_size_request(viewport,400,150);
>   gtk_widget_set_size_request(swin,400,150);
>   gtk_box_pack_start(GTK_BOX (vbox), viewport, TRUE, TRUE, 0);
>   gtk_box_pack_start(GTK_BOX (vbox), swin,     TRUE, TRUE, 0);
>
> Results in:
> http://img703.imageshack.us/img703/3624/scrolledwindowsizereque.png
>
> With other words only swin's height is honoured (its width not). The
> viewport requests are neglected.
>
> Using set_ homogeneous as in:
>
>   vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 5);
>   gtk_box_set_homogeneous(GTK_BOX (vbox),TRUE);
>   gtk_box_pack_start(GTK_BOX (vbox), viewport, TRUE, TRUE, 0);
>   gtk_box_pack_start(GTK_BOX (vbox), swin,     TRUE, TRUE, 0);
>
> results in both viewport and scrolled swin widgets to be expanded vertically
> so the top window encompasses them both (which makes the use of a scrollbar
> and viewport useless).
>
> Putting viewport and swin in a hbox first does not help; swin's height is
> again only one row (and full width). Using size_request on the hboxes
> results in the same figure as shown above.
>
> The paned version:
>
>   vbox = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
>   gtk_paned_pack1(GTK_PANED (vbox), viewport, TRUE, TRUE);
>   gtk_paned_pack2(GTK_PANED (vbox), swin,     TRUE, FALSE);
>
> Results in:
> http://img203.imageshack.us/img203/3716/scrolledwindowpanedgtk3.png
>
> The width is again around 600 pixels. And if one labels each button
> individually (as has been done in the picture) it is clear that after
> panning the top rows of the viewport are inaccessible.
>
> The Gtk2 version is so easy and simple to understand; it cannot be that a
> similar Gtk3 version is so difficult to obtain.
>
> Regards
>
>
>
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