Fwd: (Gtkmm) How to use Gdk::Window in Gtk::DrawingArea

["natan yellin" <aantny gmail com>]

Sorry, I accidentally sent this off of the list. The original email is below.

---------- Forwarded message ----------
From: natan yellin <aantny gmail com>
Date: Fri, Jun 6, 2008 at 3:47 PM
Subject: Re: (Gtkmm) How to use Gdk::Window in Gtk::DrawingArea
To: paul linuxaudiosystems com


This is also doable with Cairo. You can create a cairo context for the DrawingArea's GdkWindow and then draw onto that.

Natan

On Thu, May 29, 2008 at 2:48 PM, Paul Davis <paul linuxaudiosystems com> wrote:

On Thu, 2008-05-29 at 15:53 +0800, Dinh Khac Thanh wrote:
>
> Hi all,
>
> I am porting a program from Qt to Gtkmm and needs to draw some
> "items"(basically a "item" contains an icon, a label and some other
> small details) on a drawing area. In the Qt source, it is implemented
> like this: each "item" inherited from CanvasRectangle and then will be
> put on a Canvas. However I got trouble implementing in gtkmm.
>
> I decided to use a Gtk::DrawingArea widget as the canvas and
> Gdk::Window as the items and then use draw_pixmap() to put them on the
> canvas. I made up a "item" class which inherits from Gdk::Window and
> contains method to draw icon/text/etc on itself. The problem arises
> when Gdk::Window's constructor is called. I cannot find Gdk::Window's
> constructor details in the gtkmm online reference, thus I cannot
> implement the "item"'s constructor.
>
> Could anyone help me with Gdk::Window 's constructor details or
> suggest a different approach ? Thank you in advance.

use GnomeCanvas, not DrawingArea. despite its name, its not part of
Gnome. there is a *mm wrapper for it. you will save yourself significant
work.

--p



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