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Lasso selector #730

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Merged
merged 13 commits into from
Mar 17, 2012
Merged

Lasso selector #730

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8af797d
Change cursors and selectors to subclass Widget.
tonysyu Feb 27, 2012
5b35427
Remove call to `new_axes` in SpanSelector.
tonysyu Feb 27, 2012
e37c135
Add AxesWidget class and let it initialize `ax` and `canvas` attributes.
tonysyu Feb 27, 2012
21bca27
Add `connect_event` and `disconnect_events` to AxesWidget.
tonysyu Feb 27, 2012
c8f152a
Add default ignore method and check it in callbacks.
tonysyu Feb 28, 2012
6baa65a
Fix: save correct callback ids.
tonysyu Feb 28, 2012
0f0286e
Remove duplicate code in `SpanSelector.__init__`.
tonysyu Feb 28, 2012
8345d4c
Add LassoSelector widget with demo.
tonysyu Mar 1, 2012
adb1754
DOC: Fix sphinx class references.
tonysyu Mar 2, 2012
f169460
Fix and improve docstring.
tonysyu Mar 2, 2012
c668798
Merge branch 'base-widget' into lasso-selector
tonysyu Mar 2, 2012
fe3e2b8
Use `Path.contains_point` instead of `nxutils` function.
tonysyu Mar 12, 2012
78798f1
Add docstrings for `Lasso` and `LassoSelector`.
tonysyu Mar 12, 2012
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Add docstrings for Lasso and LassoSelector.
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@tonysyu
tonysyu committed Mar 12, 2012
commit 78798f153f9f285f7c95c41eab711d113ffeb634
50 changes: 50 additions & 0 deletions lib/matplotlib/widgets.py
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Expand Up @@ -1418,6 +1418,35 @@ def get_active(self):


class LassoSelector(AxesWidget):
"""Selection curve of an arbitrary shape.

The selected path can be used in conjunction with
:function:`~matplotlib.path.Path.contains_point` to select
data points from an image.

In contrast to :class:`Lasso`, `LassoSelector` is written with an interface
similar to :class:`RectangleSelector` and :class:`SpanSelector` and will
continue to interact with the axes until disconnected.

Parameters:

*ax* : :class:`~matplotlib.axes.Axes`
The parent axes for the widget.
*onselect* : function
Whenever the lasso is released, the `onselect` function is called and
passed the vertices of the selected path.

Example usage::

ax = subplot(111)
ax.plot(x,y)

def onselect(verts):
print verts
lasso = LassoSelector(ax, onselect)

"""

def __init__(self, ax, onselect=None, useblit=True, lineprops=None):
AxesWidget.__init__(self, ax)

Expand Down Expand Up @@ -1482,6 +1511,27 @@ def update_background(self, event):


class Lasso(AxesWidget):
"""Selection curve of an arbitrary shape.

The selected path can be used in conjunction with
:function:`~matplotlib.path.Path.contains_point` to select
data points from an image.

Unlike :class:`LassoSelector`, this must be initialized with a starting
point `xy`, and the `Lasso` events are destroyed upon release.

Parameters:

*ax* : :class:`~matplotlib.axes.Axes`
The parent axes for the widget.
*xy* : array
Coordinates of the start of the lasso.
*callback* : function
Whenever the lasso is released, the `callback` function is called and
passed the vertices of the selected path.

"""

def __init__(self, ax, xy, callback=None, useblit=True):
AxesWidget.__init__(self, ax)

Expand Down