On Fri, 16 Mar 2001, dblank wrote:
> Hello, I have just begun to work with gtk under Python. Almost everything
> works as advertised, except I can't seem to get draw_array() to work. I think
> I may be doing something wrong. Here's my sample code:
>
> import Numeric
> from gtk import *
>
> class Example(GtkWindow):
> def __init__(self):
> win = GtkWindow()
> win.connect("destroy", mainquit)
This bit is wrong. To subclass a Gtk object, call its constructor, just
like for any other python object.
> self.pic = GtkDrawingArea()
> self.pic.show()
> win.add(self.pic)
Use self rather than win here.
> self.pic.connect("expose_event", self.on_exposure)
> self.pic.set_events(GDK.EXPOSURE_MASK)
>
> self.pixmap = create_pixmap(win, 50, 50)
> gc = self.pixmap.new_gc()
>
> self.buff = Numeric.ones((50, 50, 3), 'b')
> draw_array(self.pixmap, gc, 0, 0, 0, self.buff)
Use the constant for the fifth argument here (GDK.RGB_DITHER_NONE
corresponds to 0 here).
> self._o = win._o
Don't do this. If you chain to the GtkWindow constructor, it shouldn't be
necessary.
>
> def on_exposure(self, widget, event):
> gc = self.pic.get_style().fg_gc[STATE_NORMAL]
> self.pic.draw_pixmap(gc, self.pixmap, 0, 0, 0, 0, 50, 50)
>
You need to push the GdkRGB visual before creating widgets that will use
the GdkRGB functions. So add the following line here:
push_rgb_visual()
> example = Example()
and optionally, have pop_rgb_visual() afterwards.
> example.show()
> mainloop()
>
>
> I get a core dump if I run the above. Any hints you can provide would be much
> welcomed!
>
> (I'm running Python2.0, and I have Numpy (Numeric-17.3.0) installed, with
> pygtk-0.6.6. draw_array is defined, but crashes when called.)
James.
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