Thanks John,
Sorry, this is too heavy for my programming skills.
I hope to be able to contribute some time later.
Eli
On Sat, Jul 11, 2009 at 7:55 PM, John Hunter <jdh2...@gmail.com> wrote:
> On Sat, Jul 11, 2009 at 9:55 AM, Eli Brosh<ebro...@gmail.com> wrote:
> > Thanks John,
> > A kwarg fillstyle with options 'full|top|bottom|left|right' for any
> marker
> > is certainly better than what i have done.
> > I just did not have an idea how to program this kwarg.
> > Further, I can't see an easy way of generalizing the half-filling of
> > markers.
> > is there a better way than just programming each half-filled marker
> > separately ?
> > Perhaps if you can give me some hints, I can try to do the rest of the
> work.
>
>
> Sure, first take a look at the coding guide, in particular these two
> sections which introduce kwarg processing and documentation
> conventions.
>
>
> http://matplotlib.sourceforge.net/devel/coding_guide.html#keyword-argument-processing
>
> http://matplotlib.sourceforge.net/devel/coding_guide.html#documentation-and-docstrings
>
> Basically, any new "property", where I use quotes because mpl
> properties are not the same as python properties, needs a setter and
> getter. The setter must also have an ACCEPTS flag, which gives the
> acceptable arguments. mpl uses these in the setp and getp
> introspection facilities, as well as in the auto-table building of
> kwargs in the docs. The artist.ArtistInspector is used to insepct the
> functions and docs to extract the properties:
>
> http://matplotlib.sourceforge.net/api/artist_api.html#matplotlib.artist.ArtistInspector
>
>
>
> I've committed a patch to svn that implements the fillstyle property
> for Line2D, and implemented it for draw_square. The other filled
> markers raise a NotImplementedError if the fillstyle is not 'full',
> and that is where you come in. The basic implementation is to draw
> two half markers, one filled and one unfilled, and use the rotation
> property of the transformation to support the various
> left|right|bottom|top. Here is the reference implementation for
> draw_square::
>
> def _draw_square(self, renderer, gc, path, path_trans):
> gc.set_snap(renderer.points_to_pixels(self._markersize) >= 2.0)
> side = renderer.points_to_pixels(self._markersize)
> transform = Affine2D().translate(-0.5, -0.5).scale(side)
> rgbFace = self._get_rgb_face()
> fs = self.get_fillstyle()
> if fs=='full':
> renderer.draw_markers(gc, Path.unit_rectangle(), transform,
> path, path_trans, rgbFace)
> else:
> # build a bottom filled square out of two rectangles, one
> # filled. Use the rotation to support left, right, bottom
> # or top
> if fs=='bottom': rotate = 0.
> elif fs=='top': rotate = 180.
> elif fs=='left': rotate = 270.
> else: rotate = 90.
>
> bottom = Path([[0.0, 0.0], [1.0, 0.0], [1.0, 0.5], [0.0,
> 0.5], [0.0, 0.0]])
> top = Path([[0.0, 0.5], [1.0, 0.5], [1.0, 1.0], [0.0,
> 1.0], [0.0, 0.05]])
> transform = transform.rotate_deg(rotate)
> renderer.draw_markers(gc, bottom, transform,
> path, path_trans, rgbFace)
> renderer.draw_markers(gc, top, transform,
> path, path_trans, None)
>
>
> See examples/pylab_examples/fillstyle_demo.py in svn, and the attached
> patch (although this is already committed, it might be instructional
> so you can see the steps needed to add a new property). When you
> finish the others, send along an svn diff and some more examples in
> the fillstyle_demo and I'll commit it.
>
> Thanks!
> JDH
>
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