Re: Widget Overlays

[Yevgen Muntyan <muntyan tamu edu>]

Alexander Larsson wrote:
> On Wed, 2007-04-11 at 10:47 -0500, Yevgen Muntyan wrote:
>   
> > Alexander Larsson wrote:
> >     
> > > On Wed, 2007-04-11 at 12:09 +0200, Tim Janik wrote:
> > >   
> > >       
> > > > On Mon, 9 Apr 2007, Matthew Bucknall wrote:
> > > >     
> > > >         
> > >   
> > >       
> > > > > I've considered hovering undecorated 'always above' top-level windows
> > > > > above my main window, but the icons are not rectangular in shape, so I
> > > > > need to deal with transparency (I don't know how), and I also need to
> > > > > control their position relative to the main window with pixel precision
> > > > > otherwise things are just going to look wonky.
> > > > >       
> > > > >           
> > > > see gtk_widget_shape_combine_mask():
> > > >    http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#gtk-widget-shape-combine-mask
> > > >     
> > > >         
> > > Using a toplevel window seems unnecessary. Why not just make a custom
> > > container that has two overlapping child windows, put the overlayed
> > > stuff and the shape mask on the upper window and the rest in the lower
> > > window.
> > >   
> > >       
> > It's not always easy to do if child widgets have windows, you
> > have to maintain z-order manually; all code calls
> > gdk_window_show() whenever it wants to map. For instance
> > if a child window is a notebook, it will raise children on switching
> > tabs. And even if you do raise the on-top windows after children
> > windows are raised you get nasty blinking.
> >     
>
> Not if you use a container. The window order will be this
>
> 1 toplevel
>   - 2 container
>     - 3 overlay subwindow
>     - 4 window where container children are put
>        - 5 child of container
>        - 6 other child of container
>
> Reordering the children of window 4 doesn't affect the z-order of window
> 3, or its children.
>   
You're totally right, in this setup children windows can't get on top.
And thanks a lot for this idea! I was talking about the case when
both overlay window and child windows are children of the same
window, which indeed causes troubles, and you just told me how
to remove manual gdk_window_raise :)

Best regards,
Yevgen