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Fix for #9608: RectangleSelector now reports mouse button press and release events correctly #20611

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Fix for #9608: RectangleSelector now reports mouse button press and release events correctly #20611

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aed2361
Fix RectangleSelector so that mouse button press and release are repo…
rowlesmr Jul 9, 2021
eba1886
removed redundant variables
rowlesmr Jul 9, 2021
f85c076
Revert "removed redundant variables"
rowlesmr Jul 9, 2021
94d7bfc
removed redundant variables
rowlesmr Jul 9, 2021
e1d1193
Correct the test assertions to reflect actual mouse release events
rowlesmr Jul 9, 2021
3acd729
fix RectangleSelector onselect output
rowlesmr Jul 10, 2021
f9cb279
Update doc/api/next_api_changes/behavior/20611-MRR.rst
rowlesmr Jul 10, 2021
1887407
Update doc/api/next_api_changes/behavior/20611-MRR.rst
rowlesmr Jul 10, 2021
4e15991
restore initialisation of extents on button press
rowlesmr Jul 10, 2021
2ff2764
Merge branch 'RectSel_press-release' of https://github.com/rowlesmr/m…
rowlesmr Jul 10, 2021
72c1452
update RectagleSelector for lint compliance
rowlesmr Jul 11, 2021
4601451
update references to _eventpress and _eventrelease
rowlesmr Jul 20, 2021
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6 changes: 6 additions & 0 deletions doc/api/next_api_changes/behavior/20611-MRR.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
``RectangleSelector`` ``onselect`` now reports actual mouse press and release coordinates
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The current docstrings in `.RectangleSelector` describe ``onselect`` as a function with the
the signature ``def onselect(eclick: MouseEvent, erelease: MouseEvent)``. The
previous behaviour reported the ``extent`` of the rectangle, not the mouse event
coordinates. The new behaviour reports the actual mouse event coordinates.
4 changes: 2 additions & 2 deletions lib/matplotlib/tests/test_widgets.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,8 @@ def onselect(epress, erelease):
ax._got_onselect = True
assert epress.xdata == 100
assert epress.ydata == 100
assert erelease.xdata == 199
assert erelease.ydata == 199
assert erelease.xdata == 200
assert erelease.ydata == 200

tool = widgets.RectangleSelector(ax, onselect, **kwargs)
do_event(tool, 'press', xdata=100, ydata=100, button=1)
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23 changes: 5 additions & 18 deletions lib/matplotlib/widgets.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2701,7 +2701,6 @@ def _press(self, event):
if self._active_handle is None:
x = event.xdata
y = event.ydata
self.visible = False
self.extents = x, x, y, y
self.visible = True
else:
Expand All @@ -2714,25 +2713,13 @@ def _release(self, event):
if not self._interactive:
self._to_draw.set_visible(False)

# update the eventpress and eventrelease with the resulting extents
x0, x1, y0, y1 = self.extents
self._eventpress.xdata = x0
self._eventpress.ydata = y0
xy0 = self.ax.transData.transform([x0, y0])
self._eventpress.x, self._eventpress.y = xy0

self._eventrelease.xdata = x1
self._eventrelease.ydata = y1
xy1 = self.ax.transData.transform([x1, y1])
self._eventrelease.x, self._eventrelease.y = xy1

# calculate dimensions of box or line
if self.spancoords == 'data':
spanx = abs(self._eventpress.xdata - self._eventrelease.xdata)
spany = abs(self._eventpress.ydata - self._eventrelease.ydata)
spanx = abs(self._eventpress.xdata - event.xdata)
spany = abs(self._eventpress.ydata - event.ydata)
elif self.spancoords == 'pixels':
spanx = abs(self._eventpress.x - self._eventrelease.x)
spany = abs(self._eventpress.y - self._eventrelease.y)
spanx = abs(self._eventpress.x - event.x)
spany = abs(self._eventpress.y - event.y)
else:
_api.check_in_list(['data', 'pixels'],
spancoords=self.spancoords)
Expand All @@ -2747,7 +2734,7 @@ def _release(self, event):
return

# call desired function
self.onselect(self._eventpress, self._eventrelease)
self.onselect(self._eventpress, event)
self.update()

return False
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