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Page Revision: 2012/10/07 23:04

Button element detects button presses and releases on standard input devices supported by DirectInput API. Such devices include keyboard, mouse, and a variety of joysticks and gamepads. The element collects timing statistics and, therefore is a default choice for recording of participant responses. The element allows using multiple input devices in parallel.

Table of Contents [Hide/Show] Description Snapshots Practical use Note Properties     Generic properties

Description ¶

Snapshots ¶

Snapshot 1

Snapshot 2

Practical use ¶

The typical usage for the button element is detection of particular participant responses. However, you can use the button elements to provide operator's feedback to an experiment (for example, adjusting the experimental parameters with a keyboard at the runtime)

Note ¶

The default settings allow detection only of the first button press. The following presses will be ignored. Change properties in the BEHAVIOUR group according to your requirements.)))

Properties ¶

Generic properties ¶

Name	Description	Attributes	Value Type
Control
Input device	Select one of the input devices currently connected to the computer.	Design-time action	String
Button	Defines a button which presses are registered by the element. If 'Any Button' selected then the element registers presses of all buttons on the device. The pressed button name is indicated by the Triggered Button property.	Design-time action	Int32
Triggering Mode	Defines the triggering mode for button. First Press Only mode is recommended for response time measurements.		enButtonTriggeringMode
Runtime status
Triggered button	Returns a system name of the triggered button. The keyboard symbol buttons are often denoted by the capital letters, like 'A', whereas the mouse and gamepad buttons are indicated by long names like 'Button 1'"		String
Is Down	Indicates whether the button is currently in the down state.	R, Read-only	Boolean
Triggering Time	Returns a local event time (in ms) of the last button triggering. The value can be used an accurate measure of the response time		UInt64
Is Triggered	Indicates whether a button has been triggered at least once since the onset of the parent event. The property resets on each onset of the parent event.		UInt64

+=== Properties inherited from clElement === Inherited properties of clElement

Name	Description	Constraints	Value Type	Upon Change
Control
Is Enabled	If set to false the element is completely omitted when the experiment is run.	Design Time..	Boolean
Title	Title of the element.	Design Time..	String