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Backport PR #16948 on branch v3.2.x (solution: All subclasses of LocationEvent could be used in cbook.callbacks before being fully initialized - issue 15139) #17601

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Merged
merged 1 commit into from
Jun 10, 2020
Merged

Backport PR #16948 on branch v3.2.x (solution: All subclasses of LocationEvent could be used in cbook.callbacks before being fully initialized - issue 15139) #17601

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8 changes: 6 additions & 2 deletions lib/matplotlib/backend_bases.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1420,14 +1420,17 @@ def __init__(self, name, canvas, x, y, button=None, key=None,
(*x*, *y*) in figure coords ((0, 0) = bottom left)
button pressed None, 1, 2, 3, 'up', 'down'
"""
LocationEvent.__init__(self, name, canvas, x, y, guiEvent=guiEvent)
if button in MouseButton.__members__.values():
button = MouseButton(button)
self.button = button
self.key = key
self.step = step
self.dblclick = dblclick

# super-init is deferred to the end because it calls back on
# 'axes_enter_event', which requires a fully initialized event.
LocationEvent.__init__(self, name, canvas, x, y, guiEvent=guiEvent)

def __str__(self):
return (f"{self.name}: "
f"xy=({self.x}, {self.y}) xydata=({self.xdata}, {self.ydata}) "
Expand Down Expand Up @@ -1512,8 +1515,9 @@ def on_key(event):
cid = fig.canvas.mpl_connect('key_press_event', on_key)
"""
def __init__(self, name, canvas, key, x=0, y=0, guiEvent=None):
LocationEvent.__init__(self, name, canvas, x, y, guiEvent=guiEvent)
self.key = key
# super-init deferred to the end: callback errors if called before
LocationEvent.__init__(self, name, canvas, x, y, guiEvent=guiEvent)


def _get_renderer(figure, print_method, *, draw_disabled=False):
Expand Down