Hi;
On 6 May 2015 at 10:35, rsm <rsm@xxxxxxx> wrote:
> for i in range(3):
> da=Gtk.DrawingArea()
> da.connect("draw", self.draw, [0.3, 0.4, 0.6], da)
> da.set_size_request(100,100)
> box.add(da)
>
> sw.add(vp)
> vp.add(box)
> self.add(sw)
> self.show_all()
>
> def draw(self, widget, event, color, da):
> cr = widget.get_property('window').cairo_create()
> cr.rectangle(0, 0, 100, 100)
> cr.set_source_rgb(color[0], color[1], color[2])
> cr.fill()
The implementation of the GtkWidget::draw signal handler is wrong.
The draw signal provides you with the Cairo context to draw on; you do
not need (and actually you mustn't) use Gdk.Window.cairo_create().
You're also passing the drawing area widget, but that's the widget
that emits the signal, so it's pointless.
A valid draw signal implementation is:
def draw(self, widget, cr):
cr.rectangle(x, y, width, height)
cr.set_source_rgb(red, green, blue)
cr.fill()
return True
You should read the API reference for GTK+ 3.x:
https://developer.gnome.org/gtk/stable
as well as the Python API reference:
http://lazka.github.io/pgi-docs/#Gtk-3.0
Ciao,
Emmanuele.
--
https://www.bassi.io
[@] ebassi [@gmail.com]
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