How about this:
>>> from gtk import *
>>> adj = GtkAdjustment()
>>> print adj.lower
0.0
>>> adj.lower = 1.0
>>> print adj.lower
1.0
>>>
:-)
Jeff
Bernhard Herzog wrote:
>
> "J.W. Bizzaro" <[EMAIL PROTECTED]> writes:
>
> > Have you tried using the mapping behavior of the object?
> >
> > adj = GtkAdjustment()
> > ...
> > adj['lower'] = 10
> >
> > Just a guess. I haven't used adjustments myself. Can you send an example?
>
> That was the first thing I tried, but it doesn't work. Minimal example:
> >>> from gtk import *
> >>> adj = GtkAdjustment()
> >>> adj['lower'] = 0
> Traceback (innermost last):
> File "<stdin>", line 1, in ?
> File "/usr/lib/python1.5/site-packages/gtk.py", line 50, in __setitem__
> _gtk.gtk_object_set(self._o, {key: v});
> TypeError: could not find argument "lower" in the `GtkAdjustment' class ancestry
> >>>
>
> The same thing happens in more complex setups where the adjustment is
> attached to a scrollbar, the widgets are shown and the code is called
> from the main loop.
>
> From the gtk sources, it seems that in C I'd have to modify the members
> of the GtkAdjustment struct directly (from gtktext.c):
>
> static void
> adjust_adj (GtkText* text, GtkAdjustment* adj)
> {
> gint height;
>
> gdk_window_get_size (text->text_area, NULL, &height);
>
> adj->step_increment = MIN (adj->upper, (float) SCROLL_PIXELS);
> adj->page_increment = MIN (adj->upper, height - (float) KEY_SCROLL_PIXELS);
> adj->page_size = MIN (adj->upper, height);
> adj->value = MIN (adj->value, adj->upper - adj->page_size);
> adj->value = MAX (adj->value, 0.0);
>
> gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
> }
>
> Some background: I've begun to port Sketch to GTK. Porting the drawing
> code was relatively simple because Xlib and GDK, being a thin wrapper
> around Xlib, are very similar. The rest of the GUI will take a lot more
> work.
>
> Now when I change the zoom factor in Sketch's canvas, I have to either
> change the adjustment's 'upper' and 'lower' or 'page_size' and the
> *increments.
>
> --
> Bernhard Herzog | Sketch, a python based drawing program
> [EMAIL PROTECTED] | http://www.online.de/home/sketch/
> To unsubscribe: echo "unsubscribe" | mail [EMAIL PROTECTED]
--
J.W. Bizzaro mailto:[EMAIL PROTECTED]
Boston College Chemistry http://www.uml.edu/Dept/Chem/Bizzaro/
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