Re: [matplotlib-devel] major text update

[Todd M. <jm...@st...>]

On Tue, 2004-05-04 at 14:32, John Hunter wrote:
> I factored matplotlib.text.Text instances and layouts out of the
> backends.  Now matplotlib.text.Text does all the layout and passes the
> backends a *string* plus font properties etc.  This simplifies the
> text handling on the backends considerably, which only need to know
> how to compute the width and height of an unrotated string.  The
> frontend will then do the proper alignment for rotated text.
> 
> The benefits of these changes are
> 
>   * simpler backends
> 
>   * arbitrary rotated text layout works in agg, gd, and PS
> 
>   * this lays the ground work for newline spearated text across
>     backends since the layout will be on the front and the frontend
>     can pass the backends newline split strings to render.
>  
>   * the backend draw_text method is now is consistent with other
>     backend methods, eg draw_lines, draw_rectangles.  That is, the
>     backends no nothing about matplotlib.Artists
> 
> KNOWN BUGS
> 
>   * vertical text problem in PS to be fixed
> 
> This was a pretty comprehensive change so I recommend syncing your CVS
> tree.
> 
> Todd, I needed Numeric.Matrix to do the linear algebra for the
> rotations in the text module text.  Is there a numarray equivalent
> that we can expose in numerix?

No, not yet.  I was thinking about adding a minimal Matrix class to the
numarray half of matplotlib.numerix for now.  Then I'll add a more
full-featured Matrix class to numarray-1.0.  Does that sound OK?

Todd

> 
> Paul, I committed these changes after synching with your new font
> caching and there doesn't appear to be any problem; miraculously CVS
> seems to be working pretty well.  I did some additional caching of AFM
> instances in backend_ps.  You might want to rerun your ps profile
> script and see if the numbers improve further still.
> 
> JDH
> 
> 
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-- 
Todd Miller <jm...@st...>