Re: [Matplotlib-users] Problem with text bounding box

[Eric F. <ef...@ha...>]

On 2012/09/03 1:38 AM, Jakob Gager wrote:
> Recently, I switched from matplotlib 0.99 to 1.0.1 and unfortunately discovered
> that my text scaling script stopped working properly. The script scales the given text
> to fit into the current figure.
>
> A quick example of what I'm doing (works in 0.99, but not in 1.0.1 and 1.1.1rc):
> import matplotlib.pyplot as plt
> plt.ion()
> fig = plt.figure(1, (6,8), dpi=72)
> fig.add_axes([0,0,1,1])
> txt1 = plt.text(0.5,0.5,'foobar',horizontalalignment='center',verticalalignment='center')
> plt.draw()
> # compute width of figure in points and divide by txt1 bounding box width
> sf1 = 6*72./txt1.cached.items()[0][1][1][0][1][0]
> txt1.set_size(txt1.get_size()*sf1)
> plt.draw()
>
> The problem is related to the fact that starting from mpl 1.0.1, the txt1.cached dictionary contains
> information of all text objects present rather than only of the specific object.
> I guess this behavior is intended, however this way it is rather complicated to derive the bounding
> box of the specific text object without cycling over the whole dictionary.

It looks like you can either use the _get_layout() method (which 
requires that you specify the renderer), or, if you know the text object 
will be among the last 50 for which _get_layout() has been called, you 
can use txt1.cached[txt1.get_prop_typ()].

>
> Is there a different way to achieve a fitted text object?

Not that I know of; but someone else may have a suggestion.

Eric

>
> Thanks,
> br Jakob
>
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