---
name: "Sensor"
section: "3"
platform: "linux"
package: "ivtools-dev"
version: "1.1.3-4"
release: "Debian 3.1 (Sarge)"
platforms: ["linux"]
url: "https://new.carta.tech/Sensor"
---

# Sensor(3)

describe input interest

## NAME

Sensor - describe input interest

## SYNOPSIS

**#include \<InterViews/sensor.h\>**

## DESCRIPTION

A sensor specifies a set of input events to catch.

## PUBLIC OPERATIONS

- **Sensor()**

  Create a new sensor that initially will not catch any events.

- **virtual void motion(boolean)**

  Specify the sensor should (parameter is true) or should not (parameter is false) catch pointer motion events.

- **virtual boolean motion()**

  Return whether the sensor is catching pointer motion events.

- **virtual void key(boolean)**

  Specify the sensor should (parameter is true) or should not (parameter is false) catch keyboard events.

- **virtual boolean key()**

  Return whether the sensor is catching keyboard events.

- **virtual void button(boolean, PointerButton = Event::any)**

  Specify the sensor should (parameter is true) or should not (parameter is false) catch button events. The pointer button may specify a particular button or Event::any (meaning all button events).

- **virtual boolean button(PointerButton = Event::any)**

  Return whether the sensor is catching button events. The pointer button may specify a particular button or Event::any (meaning any of the buttons).

- **virtual boolean caught(Event&)**

  Return whether the sensor is catching the given event.

- **void Catch(EventType)**

  Express interest in a particular type of event. This function is provided solely for backward compatibility and will be removed in a future version.

- **void CatchButton(EventType, int)**

  Express interest in a particular type of button event for a specific button. This function is provided solely for backward compatibility and will be removed in a future version.

- **void Ignore(EventType)**

  Remove interest in a particular type of event. This function is provided solely for backward compatibility and will be removed in a future version.

- **void IgnoreButton(EventType, int)**

  Remove interest in a particular type of button event for a specific button. This function is provided solely for backward compatibility and will be removed in a future version.

## SEE ALSO

Event(3I)