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Set the canvas cursor when using a SpanSelector #20743

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Merged
merged 2 commits into from
Jul 27, 2021
Merged

Set the canvas cursor when using a SpanSelector #20743

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c2d4061
Clear the selector's active handle on button release.
QuLogic Jul 24, 2021
e6176b7
Set the canvas cursor when using a SpanSelector.
QuLogic Jul 24, 2021
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37 changes: 36 additions & 1 deletion lib/matplotlib/widgets.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@

import matplotlib as mpl
from matplotlib import docstring
from . import _api, cbook, colors, ticker
from . import _api, backend_tools, cbook, colors, ticker
from .lines import Line2D
from .patches import Circle, Rectangle, Ellipse

Expand Down Expand Up @@ -2192,8 +2192,26 @@ def _setup_edge_handle(self, props):
useblit=self.useblit)
self.artists.extend([line for line in self._edge_handles.artists])

def _set_cursor(self, enabled):
"""Update the canvas cursor based on direction of the selector."""
if enabled:
cursor = (backend_tools.Cursors.RESIZE_HORIZONTAL
if self.direction == 'horizontal' else
backend_tools.Cursors.RESIZE_VERTICAL)
else:
cursor = backend_tools.Cursors.POINTER

self.ax.figure.canvas.set_cursor(cursor)

def connect_default_events(self):
# docstring inherited
super().connect_default_events()
if getattr(self, '_interactive', False):
self.connect_event('motion_notify_event', self._hover)

def _press(self, event):
"""Button press event handler."""
self._set_cursor(True)
if self._interactive and self._rect.get_visible():
self._set_active_handle(event)
else:
Expand Down Expand Up @@ -2248,6 +2266,7 @@ def direction(self, direction):

def _release(self, event):
"""Button release event handler."""
self._set_cursor(False)
if not self._interactive:
self._rect.set_visible(False)

Expand All @@ -2264,8 +2283,23 @@ def _release(self, event):
# self._pressv is deprecated but we still need to maintain it
self._pressv = None

self._active_handle = None

return False

def _hover(self, event):
"""Update the canvas cursor if it's over a handle."""
if self.ignore(event):
return

if self._active_handle is not None:
# Do nothing if button is pressed and a handle is active, which may
# occur with drag_from_anywhere=True.
return

_, e_dist = self._edge_handles.closest(event.x, event.y)
self._set_cursor(e_dist <= self.grab_range)

def _onmove(self, event):
"""Motion notify event handler."""

Expand Down Expand Up @@ -2805,6 +2839,7 @@ def _release(self, event):
# call desired function
self.onselect(self._eventpress, self._eventrelease)
self.update()
self._active_handle = None

return False

Expand Down