I'm trying to find the quickest way to erase a rectangular area of
the figure canvas. I tried using canvas.restore_region with the
optional bbox argument, but there seems to be some mismatch between
the measurement units of the saved buffer object and the currently
shown data. For instance, if I have a Text object on my plot, I tried
this:
bbox = g.text.get_window_extent()
canvas.restore_region(background, bbox)
. . . but it does not correctly block out the text. (The restored
rectangle from the background appears elsewhere on the axes.) How can
I convert the buffer coordinates to the coordinates of the the
displayed plot?
I also tried creating a patch with the same bounds as the text bbox
and adding it to the axes, but this seems to have no effect. Do I
have to do something besides ax.draw_artist(mypatch) to get it to draw?
This is part of the same thing I posted about a few days ago with
trying to do an animation with many moving parts. Are there any
examples of animations which do not involve restoring the entire
background with each draw, but rather individually erasing individual
elements in the plot and redrawing them elsewhere? That's what I'm
trying to do here.
Thanks,
--
Brendan Barnwell
"Do not follow where the path may lead. Go, instead, where there is
no path, and leave a trail."
--author unknown
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