On Mon, Nov 17, 2008 at 8:05 AM, Hrafnkell Pálsson <[EMAIL PROTECTED]> wrote:
>
> Hi
>
> I tried you suggestions but it didn't work out for me.
> In the following code I try to save the axes and the grid from figure1 into
> buffer and then restore it on figure2 but figure2.png turns out to be of an
> empty canvas.
>
> #!/usr/bin/env /opt/python/bin/python
> # encoding: utf-8
> import matplotlib
> if not matplotlib.get_backend()=='agg':
> matplotlib.use('Agg')
> import pylab
>
> figure1 = pylab.figure(1)
> axes1 = pylab.gca()
> axes1.grid()
> canvas1 = axes1.figure.canvas
> background = canvas1.copy_from_bbox(axes1.bbox)
> figure1.savefig('figure1.png')
The only problem I could see with your code is that you need to force
a draw before copying the background. But when I added the draw, and
then further simplified to reuse the same canvas, I still am not
seeing the restored region. I will need to do further digging to see
what is going wrong, but the problem appears both on the maintenance
branch and the trunk. Here is my modified test script:
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
fig1 = plt.figure(1)
ax1 = fig1.add_subplot(111)
ax1.grid()
fig1.canvas.draw()
fig1.savefig('figure1.png')
background = fig1.canvas.copy_from_bbox(ax1.bbox)
fig1.clf()
#figure2 = pylab.figure(2)
#canvas2 = figure2.canvas
fig1.canvas.restore_region(background)
fig1.savefig('figure2.png')
JDH
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