Hi, here a message I sent a while ago, but I hanen't seen it on the ML, so here it is again, in case.
Thanks,
David Douard
---------------
Here is a simple patch that allow to make legend and its compnents
(texts, patches and lines) pickable for real.
The goal was to make this work (may be added to examples in mpl):
from pylab import *
N=100
props = dict( alpha=0.5, faceted=False )
fig=figure()
handles = []
colours = ['red', 'green', 'blue', 'magenta', 'cyan', 'yellow']
for colour in colours:
x, y = rand(2,N)
s = 400.0 * rand(N)
handles.append(scatter(x, y, c=colour, s=s, picker=True, **props))
l = legend(handles, colours, )
grid(True)
for lb in l.get_texts():
lb.set_picker(True)
def pick(event):
a = event.artist
if isinstance(a, matplotlib.text.Text):
name = event.artist.get_text()
h = handles[colours.index(name)]
h.set_visible(not h.get_visible())
draw()
fig.canvas.mpl_connect('pick_event', pick)
show()
PS: note that I am not on the mpl-devel mailing-list. Please Cc me
back in case of reply.
--
David Douard LOGILAB, Paris (France), +33 1 45 32 03 12
Formations Python, Zope, Debian : http://www.logilab.fr/formations
Développement logiciel sur mesure : http://www.logilab.fr/services
Informatique scientifique : http://www.logilab.fr/science
Index: lib/matplotlib/legend.py
===================================================================
--- lib/matplotlib/legend.py (révision 3714)
+++ lib/matplotlib/legend.py (copie de travail)
@@ -222,14 +222,18 @@
self._set_artist_props(self.legendPatch)
self._drawFrame = True
+ def contains(self, mouseevent):
+ if callable(self._contains): return self._contains(self,mouseevent)
+
+ return self.legendPatch.contains(mouseevent)
+
def _set_artist_props(self, a):
a.set_figure(self.figure)
a.set_transform(self.get_transform())
def _approx_text_height(self):
return self.fontsize/72.0*self.figure.dpi.get()/self.parent.bbox.height()
-
-
+
def draw(self, renderer):
if not self.get_visible(): return
renderer.open_group('legend')
@@ -404,6 +408,9 @@
'return a list of text.Text instance in the legend'
return silent_list('Text', self.texts)
+ def get_children(self):
+ return [self.get_frame()] + self.get_lines() + self.get_patches() + self.get_texts()
+
def _get_texts(self, labels, left, upper):
# height in axes coords
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