Those artist in offsetbox module (e.g., TextArea, VPacker,
AnchoredOffsetbox) are mostly a container object, i.e., actual drawing
is done by other artists. And changing the artist attributes of the
container object often does not work.
In your case (I guess you want to make the frame translucent?), the
actual artist responsible for drawing the frame is anchored_box.patch
(==art.patch). So
anchored_box.patch.set_alpha(0.5)
should work.
-JJ
On Tue, Aug 17, 2010 at 12:59 AM, Mathew Yeates <mat.yea...@gmail.com> wrote:
> Hi
> I want my plot to be visible when I display some text over it. Why
> doesn't this work?
> fig = plt.figure(figsize=(5,5), dpi=100)
> ax=fig.add_axes([0.1,0.1,0.8,.8])
> ax.hist(data)
> box1 = TextArea("Minimum: %f" % mind, textprops=dict(color="k"))
> box2 = TextArea("Maximum: %f" % maxd, textprops=dict(color="k"))
> box = VPacker(children=[box1,box2],
> align="center",
> pad=0, sep=5)
> anchored_box = AnchoredOffsetbox(loc=3,
> child=box, pad=0.,
> frameon=True,
> bbox_to_anchor=(0.8, 0.72),
> bbox_transform=ax.transAxes,
> borderpad=0.,
> )
>
>
> art=ax.add_artist(anchored_box)
> art.set_alpha(0.5)
>
> -Mathew
>
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