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Classes used for blocking interaction with figure windows:
`BlockingInput`
Creates a callable object to retrieve events in a blocking way for
interactive sessions. Base class of the other classes listed here.
`BlockingKeyMouseInput`
Creates a callable object to retrieve key or mouse clicks in a blocking
way for interactive sessions. Used by `~.Figure.waitforbuttonpress`.
`BlockingMouseInput`
Creates a callable object to retrieve mouse clicks in a blocking way for
interactive sessions. Used by `~.Figure.ginput`.
`BlockingContourLabeler`
Creates a callable object to retrieve mouse clicks in a blocking way that
will then be used to place labels on a `.ContourSet`. Used by
`~.Axes.clabel`.
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BlockingInputz1Callable for retrieving events in a blocking way.� c C s || _ || _d S �N��fig�
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zBlockingInput.__init__c C sZ | � |� t�dt| j�� | �� t| j�| j kr dkr+n dS | jj� � dS dS )zY
Event handler; will be passed to the current figure to retrieve events.
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� add_event�_log�info�len�events�
post_event�nr �canvas�stop_event_loop�r �eventr r r �on_event( s
"�zBlockingInput.on_eventc C s dS )z-For baseclass, do nothing but collect events.Nr �r r r r r 8 s zBlockingInput.post_eventc C s$ | j D ] }| jj�|� qg | _ dS )zDisconnect all callbacks.N)� callbacksr r �mpl_disconnect)r �cbr r r �cleanup; s
zBlockingInput.cleanupc C � | j �|� dS )z5For base class, this just appends an event to events.N)r �appendr r r r r A s zBlockingInput.add_event���c C r" )z�
Remove an event from the event list -- by default, the last.
Note that this does not check that there are events, much like the
normal pop method. If no events exist, this will throw an exception.
N)r �pop)r �indexr r r � pop_eventE s zBlockingInput.pop_event� � c sp t jt|d� |� _g � _� jjjr� j�� � fdd�� j D �� _
z� jjj |d� W � � � � jS � � � w )z%Blocking call to retrieve *n* events.)r c s g | ] }� j j�|� j��qS r )r r � mpl_connectr )�.0r r r r �
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Callable for retrieving mouse clicks in a blocking way.
This class will also retrieve keypresses and map them to mouse clicks:
delete and backspace are a right click, enter is like a middle click,
and all others are like a left click.
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button_pop� button_stop)r r � mouse_add� mouse_pop�
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zBlockingMouseInput.__init__c C sD t | j�dkrt�d� dS | jd jdkr | �� dS | �� dS )zProcess an event.r z
No events yetr$ r; N)r r r �warningr � key_event� mouse_eventr r r r r } s
z BlockingMouseInput.post_eventc C s\ | j d }|j}|| jkr| �|� dS || jkr | �|� dS || jkr,| �|� dS dS )z Process a mouse click event.r$ N)r �buttonr> �mouse_event_popr? �mouse_event_stopr= �mouse_event_add)r r rH r r r rG � s
�z BlockingMouseInput.mouse_eventc C sV | j d }|jdu r dS |jdv r| �|� dS |jdv r$| �|� dS | �|� dS )zV
Process a key press event, mapping keys to appropriate mouse clicks.
r$ N)� backspace�delete)�escape�enter)r �keyrI rJ rK r r r r rF � s
z BlockingMouseInput.key_eventc C s" |j r
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Process an button-1 event (add a click if inside axes).
Parameters
----------
event : `~.backend_bases.MouseEvent`
N)�inaxes� add_clickr r% r r r r rK � s z"BlockingMouseInput.mouse_event_addc C s t �| � | jj�� dS )z�
Process an button-2 event (end blocking input).
Parameters
----------
event : `~.backend_bases.MouseEvent`
N)r r% r r r r r r r rJ � s
z#BlockingMouseInput.mouse_event_stopc C s" t �| � | jr| �|� dS dS )z�
Process an button-3 event (remove the last click).
Parameters
----------
event : `~.backend_bases.MouseEvent`
N)r r% r r r r r rI � s
�z"BlockingMouseInput.mouse_event_popc C sz | j �|j|jf� t�dt| j �|j|j� | jr;tj |jg|jgddd�}|j
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Add the coordinates of an event to the list of clicks.
Parameters
----------
event : `~.backend_bases.MouseEvent`
zinput %i: %f, %f�+�r)�marker�colorN)�clicksr# �xdata�ydatar r r � show_clicks�mlines�Line2DrQ �add_line�marksr r �draw)r r �liner r r rR � s �� �z BlockingMouseInput.add_clickr$ c C s6 | j �|� | jr| j�|��� | jj�� dS dS )z�
Remove a click (by default, the last) from the list of clicks.
Parameters
----------
event : `~.backend_bases.MouseEvent`
N)rW r% rZ r^ �remover r r_ �r r r& r r r � pop_click� s
�z BlockingMouseInput.pop_clickc s | � ||� t� �|� dS )zw
Remove a click and the associated event from the list of clicks.
Defaults to the last click.
N)rc r< r% rb rC r r r% � s zBlockingMouseInput.popNc s: | j r| jD ]}|�� qg | _| jj�� t� �� dS )z{
Parameters
----------
event : `~.backend_bases.MouseEvent`, optional
Not used
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zBlockingMouseInput.cleanupr( r) Tc s( || _ g | _g | _t� j||d� | jS )zV
Blocking call to retrieve *n* coordinate pairs through mouse clicks.
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zBlockingMouseInput.__call__r3 r
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S )�BlockingContourLabelerzt
Callable for retrieving mouse clicks and key presses in a blocking way.
Used to place contour labels.
c s || _ t� j|jjd� d S )N)r )�csr< r �axes�figure)r rk rC r r r s z BlockingContourLabeler.__init__c C � | � |� d S r
)�button1r r r r rR � z BlockingContourLabeler.add_clickr$ c C rn r
)�button3rb r r r rc rp z BlockingContourLabeler.pop_clickc C sJ |j | jjkr | jj|j|j| j| jdd� | jj �
� dS t � | � dS )z�
Process an button-1 event (add a label to a contour).
Parameters
----------
event : `~.backend_bases.MouseEvent`
F)�inline_spacing� transformN)
rQ rk �ax�add_label_near�x�y�inlinerr r r r_ r r% r r r r ro s �z BlockingContourLabeler.button1c C s( | j rdS | j�� | jjjj�� dS )a�
Process an button-3 event (remove a label if not in inline mode).
Unfortunately, if one is doing inline labels, then there is currently
no way to fix the broken contour - once humpty-dumpty is broken, he
can't be put back together. In inline mode, this does nothing.
Parameters
----------
event : `~.backend_bases.MouseEvent`
N)rx rk � pop_labelrt rm r r_ r r r r rq 0 s
z BlockingContourLabeler.button3� c s" || _ || _t� j||dd� d S )NF)r r- rZ )rx rr r< r2 )r rx rr r r- rC r r r2 B s z BlockingContourLabeler.__call__r3 )rz r$ r$ ) r4 r5 r6 r7 r rR rc ro rq r2 ri r r rC r rj s
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�BlockingKeyMouseInputzQ
Callable for retrieving mouse clicks and key presses in a blocking way.
c s t � j|dd� d S r9 )r< r )r r rC r r r M s
�z BlockingKeyMouseInput.__init__c C s* | j r| j d jdk| _dS t�d� dS )z Determine if it is a key event.r$ r; zNo events yet.N)r r �
keyormouser rE r r r r r Q s z BlockingKeyMouseInput.post_eventr) c s d| _ t� jd|d� | j S )z�
Blocking call to retrieve a single mouse click or key press.
Returns ``True`` if key press, ``False`` if mouse click, or ``None`` if
timed out.
Nr( re )r| r< r2 )r r- rC r r r2 X s z BlockingKeyMouseInput.__call__)r) )r4 r5 r6 r7 r r r2 ri r r rC r r{ H s
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