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Changes for 0.50
================
.. code-block:: text
* refactored Figure class so it is no longer backend dependent.
FigureCanvasBackend takes over the backend specific duties of the
Figure. matplotlib.backend_bases.FigureBase moved to
matplotlib.figure.Figure.
* backends must implement FigureCanvasBackend (the thing that
controls the figure and handles the events if any) and
FigureManagerBackend (wraps the canvas and the window for MATLAB
interface). FigureCanvasBase implements a backend switching
mechanism
* Figure is now an Artist (like everything else in the figure) and
is totally backend independent
* GDFONTPATH renamed to TTFPATH
* backend faceColor argument changed to rgbFace
* colormap stuff moved to colors.py
* arg_to_rgb in backend_bases moved to class ColorConverter in
colors.py
* GD users must upgrade to gd-2.0.22 and gdmodule-0.52 since new gd
features (clipping, antialiased lines) are now used.
* Renderer must implement points_to_pixels
Migrating code:
MATLAB interface:
The only API change for those using the MATLAB interface is in how
you call figure redraws for dynamically updating figures. In the
old API, you did
fig.draw()
In the new API, you do
manager = get_current_fig_manager()
manager.canvas.draw()
See the examples system_monitor.py, dynamic_demo.py, and anim.py
API
There is one important API change for application developers.
Figure instances used subclass GUI widgets that enabled them to be
placed directly into figures. e.g., FigureGTK subclassed
gtk.DrawingArea. Now the Figure class is independent of the
backend, and FigureCanvas takes over the functionality formerly
handled by Figure. In order to include figures into your apps,
you now need to do, for example
# gtk example
fig = Figure(figsize=(5,4), dpi=100)
canvas = FigureCanvasGTK(fig) # a gtk.DrawingArea
canvas.show()
vbox.pack_start(canvas)
If you use the NavigationToolbar, this in now initialized with a
FigureCanvas, not a Figure. The examples embedding_in_gtk.py,
embedding_in_gtk2.py, and mpl_with_glade.py all reflect the new
API so use these as a guide.
All prior calls to
figure.draw() and
figure.print_figure(args)
should now be
canvas.draw() and
canvas.print_figure(args)
Apologies for the inconvenience. This refactorization brings
significant more freedom in developing matplotlib and should bring
better plotting capabilities, so I hope the inconvenience is worth
it.
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