Re: draw on textview, gtk3 < 3.14

[Daniel Kasak <d j kasak dk gmail com>]

Not answering your question, but just FYI there are win32 binaries around.
I have Gtk-3.14.3 ( bundled with Perl and other stuff ) at:
http://tesla.duckdns.org/gtk3-perl-windows/ - in the "JewelKit" package.
Sorry I don't have the time to unbundle gtk from everything else at this
point.

I believe other people have their own Gtk3 binaries around, and build
scripts as well. I have build instructions ... not quite at the level of
having build scripts yet.

Dan

On Tue, Feb 17, 2015 at 3:13 AM, Gilzad Hamuni <gilli4 gmx net> wrote:

> Hi list,
>
> I'm trying to draw lines on a text view.
>
> In my current solution I have placed a transparent drawing area on top of
> the text view. This does work unless the compositor is different from
> mutter (I guess). As a result in XFCE the drawing area isn't transparent
> while in Cinnamon and Unity I get the expected result.
>
> Someone who used gtk2 managed to draw into the textview's 'expose-event' (
> http://stackoverflow.com/questions/2027379/draw-lines-on-gtk-textview ).
> But using gtk3's 'draw-event' I can't come any close to his approach.
> 'drawable' has been abandoned and if I do anything inside the 'draw-event',
> the whole content of the textview will be replaced by the new cairo buffer.
> Anyway to mix the old content?
>
> I realized there's a 'draw_layer()' virtual function in gtk 3.14 and using
> it with the condition 'GTK_TEXT_VIEW_LAYER_ABOVE' is very much what I need.
> But I don't think I can update my libraries that easily, especially because
> I need to create win32 compiles of my app soon.
>
> So if you can point me to a way on how to draw lines on a textview using
> gtk3 but without the need of a compositing manager and without new versions
> like 3.14, I'd be very glad.
>
> My gtk3 lib is 3.8, I'm using Vala but I'll be glad about any C- or
> Python-example as well. I should be able to adopt it after all.
>
> Thanks a bunch in advance.
>
> gilzad
>
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