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[Bug]: DoubleClick not working for MouseEvent #22681

Closed
@raamana

Description

@raamana

Bug summary

Double Click is not getting recognized asTrue inMouseEvent.dblclick.

I see them as two separate single clicks but the second one'sMouseEvent.dblclick is False in MPL 3.5.1. It works fine on 3.5.0 and 3.4.3.

Code for reproduction

Actual code is here inVisualQC

CLI instructions to reproduce from this codebase are rather complicated needing a lot of setup, unfortunately. But the simplest example to reproduce is here:

frommatplotlibimportpyplotaspltimportnumpyasnpdefonclick(event):print('MouseEvent: button value {} name {} dblclk: {}'''.format(event.button.value,event.button.name,event.dblclick))fig,ax=plt.subplots()ax.plot(np.random.rand(10))cid=fig.canvas.mpl_connect('button_press_event',onclick)fig.canvas.manager.show()fig.canvas.draw_idle()# starting a 'blocking' loop to let the user interactfig.canvas.start_event_loop(timeout=-1)fig.canvas.mpl_disconnect(cid)

Actual outcome

< single click >
MouseEvent: button value 1 name LEFT dblclk:
< right click >
MouseEvent: button value 3 name RIGHT dblclk:
< double click with trackpad on MacBook pro >
MouseEvent: button value 1 name LEFT dblclk:
MouseEvent: button value 1 name LEFT dblclk:
< right click >
MouseEvent: button value 3 name RIGHT dblclk:
< double click external mouse >
MouseEvent: button value 1 name LEFT dblclk:
MouseEvent: button value 1 name LEFT dblclk:

Expected outcome

% single click
MouseEvent: button value 1 name LEFT dblclk: False
< right click >
MouseEvent: button value 3 name RIGHT dblclk: False
< double click with trackpad on MacBook pro >
MouseEvent: button value 2 name LEFT dblclk: True
< right click >
MouseEvent: button value 3 name RIGHT dblclk: False
< double click external mouse >
MouseEvent: button value 2 name LEFT dblclk: True

Additional information

numpy 1.17.4 / scipy 1.1.0 / matplotlib 3.5.1
python 3.7.2 (default, Dec 29 2018, 00:00:04)
[Clang 4.0.1 (tags/RELEASE_401/final)]
platform Darwin-21.3.0-x86_64-i386-64bit
Darwin Kernel Version 21.3.0: Wed Jan 5 21:37:58 PST 2022; root:xnu-8019.80.24~20/RELEASE_X86_64

Operating system

MacOS Darwin-21.3.0

Matplotlib Version

3.5.1

Matplotlib Backend

TkAgg

Python version

3.7.2

Jupyter version

No response

Installation

pip

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