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Use lambdas to prevent gc'ing and deduplication of widget callbacks. #18923

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Merged
merged 1 commit into from
Nov 11, 2020
Merged

Use lambdas to prevent gc'ing and deduplication of widget callbacks. #18923

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10 changes: 0 additions & 10 deletions doc/api/next_api_changes/behavior/18226-ES.rst
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10 changes: 5 additions & 5 deletions lib/matplotlib/widgets.py
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Original file line number Diff line number Diff line change
Expand Up @@ -222,7 +222,7 @@ def on_clicked(self, func):

Returns a connection id, which can be used to disconnect the callback.
"""
return self._observers.connect('clicked', func)
return self._observers.connect('clicked', lambda event: func(event))

def disconnect(self, cid):
"""Remove the callback function with connection id *cid*."""
Expand Down Expand Up @@ -483,7 +483,7 @@ def on_changed(self, func):
int
Connection id (which can be used to disconnect *func*)
"""
return self._observers.connect('changed', func)
return self._observers.connect('changed', lambda val: func(val))

def disconnect(self, cid):
"""
Expand Down Expand Up @@ -646,7 +646,7 @@ def on_clicked(self, func):

Returns a connection id, which can be used to disconnect the callback.
"""
return self._observers.connect('clicked', func)
return self._observers.connect('clicked', lambda text: func(text))

def disconnect(self, cid):
"""Remove the observer with connection id *cid*."""
Expand Down Expand Up @@ -897,7 +897,7 @@ def on_text_change(self, func):

A connection id is returned which can be used to disconnect.
"""
return self._observers.connect('change', func)
return self._observers.connect('change', lambda text: func(text))

def on_submit(self, func):
"""
Expand All @@ -906,7 +906,7 @@ def on_submit(self, func):

A connection id is returned which can be used to disconnect.
"""
return self._observers.connect('submit', func)
return self._observers.connect('submit', lambda text: func(text))

def disconnect(self, cid):
"""Remove the observer with connection id *cid*."""
Expand Down