expyriment.io.TouchScreenButtonBox¶

class expyriment.io.TouchScreenButtonBox(button_fields, stimuli=[], background_stimulus=None)¶

A class implementing a TouchScreenButtonBox.

__init__(button_fields, stimuli=[], background_stimulus=None)¶

Initialize a touchscreen button box.

Parameters:

button_fields : visual Expyriment stimulus or list of stimuli

The button fields defines the area on which a click action will be registered.

stimuli : visual Expyriment stimulus or list of stimuli, optional

Additional visual stimuli that will be presented together with the button fields. Stimuli are plotted on top of the button_fields.

background_stimulus : visual Expyriment stimulus, optional

The background stimulus on which the touschscreen button fields are presented. Importantly, background_stimulus has to have size of the screen.

Notes

Every visual Expyriment stimulus can serve as a touchscreen button field. If the TouchScreenButtonBox is presented, it can be checked for events using the methods ‘check’ and ‘wait’.

add_button_field(button_field)¶

Add a touchscreen button fields.

Parameters:	button_field : visual Expyriment stimulus

add_stimulus(stimulus)¶

Add additional stimulus

The added stimulus will be presented together with the button fields.

Parameters:	stimulus : visual Expyriment stimulus

background_stimulus¶

Getter of background stimulus.

Background stimulus, on which the button fields and the additional stimuli will be presented. (visual Expyriment stimuli)

button_field¶: getter of button fields (list of visual Expyriment stimuli)

check(button_fields=None)¶

Check if a button field is clicked.

Parameters:

button_fields : Expyriment stimulus or list of stimuli, optional

The button fields that will be checked for.

Returns:

pressed_button_field : Expyriment stimulus or list of stimuli, optional

The button fields that will be checked for.

touch_time : integer

The time when the button was touched. Function might return delayed, because button field comparison (after touch) takes time. The return time is most accurate.

Notes

Don’t forget to show the TouchScreenButtonBox.

clear_event_buffer()¶: Clear the event buffer of the touchscreen/mouse input device.

create()¶

Create the touchscreen buttonbox.

Prepares the button fields and additional stimuli for fast presentation.

last_touch_position¶: getter for the last touch position (x,y)

logging¶: Getter for logging.

set_logging(onoff)¶

Set logging of this object on or off

Parameters:

onoff : bool

set logging on (True) or off (False)

Notes

See also design.experiment.set_log_level fur further information about event logging.

show()¶: Present touchscreen buttons.

stimuli¶: getter of additional stimuli (list of visual Expyriment stimuli)

wait(duration=None, button_fields=None, callback_function=None, process_control_events=True)¶

Wait for a touchscreen button box click.

Parameters:

button_fields : Expyriment stimulus or list of stimuli, optional

The button fields that will be checked for.

duration : int, optional

maximal time to wait in ms

callback_function : function, optional

function to repeatedly execute during waiting loop

process_control_events : bool, optional

process io.Keyboard.process_control_keys() and io.Mouse.process_quit_event() (default = True)

Returns:

pressed_button_field : Expyriment stimulus or None

the button field defined by a stimulus that has been pressed

rt : int

reaction time