Starboard Module Reference: input.h

Defines input events and associated data types.



Identifies possible input subsystem types. The types of events that each device type produces correspond to SbInputEventType values.


  • kSbInputDeviceTypeGesture

    Input from a gesture-detection mechanism. Examples include Kinect, Wiimotes, etc...

    Produces Move, Press and Unpress events.

  • kSbInputDeviceTypeGamepad

    Input from a gamepad, following the layout provided in the W3C Web Gamepad API. [ ]

    Produces Move, Press and Unpress events.

  • kSbInputDeviceTypeKeyboard

    Keyboard input from a traditional keyboard or game controller chatpad.

    Produces Press and Unpress events.

  • kSbInputDeviceTypeMouse

    Input from a traditional mouse.

    Produces Move, Press, and Unpress events.

  • kSbInputDeviceTypeRemote

    Input from a TV remote-control-style device.

    Produces Press and Unpress events.

  • kSbInputDeviceTypeTouchScreen

    Input from a single- or multi-touchscreen.

    Produces Move, Press, and Unpress events.

  • kSbInputDeviceTypeTouchPad

    Input from a touchpad that is not masquerading as a mouse.

    Produces Move, Press, and Unpress events.

  • kSbInputDeviceTypeOnScreenKeyboard

    Keyboard input from an on screen keyboard.

    Produces Input events.


The action that an input event represents.


  • kSbInputEventTypeMove

    Device Movement. In the case of Mouse, and perhaps Gesture, the movement tracks an absolute cursor position. In the case of TouchPad, only relative movements are provided.

  • kSbInputEventTypePress

    Key or button press activation. This could be a key on a keyboard, a button on a mouse or game controller, a push from a touch screen, or a gesture. An Unpress event is subsequently delivered when the Press event terminates, such as when the key/button/finger is raised. Injecting repeat presses is up to the client.

  • kSbInputEventTypeUnpress

    Key or button deactivation. The counterpart to the Press event, this event is sent when the key or button being pressed is released.

  • kSbInputEventTypeWheel

    Wheel movement. Provides relative movements of the Mouse wheel.

  • kSbInputEventTypeInput



Event data for kSbEventTypeInput events.


  • SbTimeMonotonic timestamp

    The time that should be reported for this event. This is intended to facilitate calculation of time-sensitive information (e.g. velocity for kSbInputEventTypeMove). This may be set to 0 to have the relevant systems automatically set the timestamp. However, this may happen at a later time, so the relative time between events may not be preserved.

  • SbWindow window

    The window in which the input was generated.

  • SbInputEventType type

    The type of input event that this represents.

  • SbInputDeviceType device_type

    The type of device that generated this input event.

  • int device_id

    An identifier that is unique among all connected devices.

  • SbKey key

    An identifier that indicates which keyboard key or mouse button was involved in this event, if any. All known keys for all devices are mapped to a single ID space, defined by the SbKey enum in key.h.

  • wchar_t character

    The character that corresponds to the key. For an external keyboard, this character also depends on the keyboard language. The value is 0 if there is no corresponding character.

  • SbKeyLocation key_location

    The location of the specified key, in cases where there are multiple instances of the button on the keyboard. For example, some keyboards have more than one "shift" key.

  • unsigned int key_modifiers

    Key modifiers (e.g. Ctrl, Shift) held down during this input event.

  • SbInputVector position

    The (x, y) coordinates of the persistent cursor controlled by this device. The value is 0 if this data is not applicable. For events with type kSbInputEventTypeMove and device_type kSbInputDeviceTypeGamepad, this field is interpreted as a stick position with the range [-1, 1], with positive values for the down and right direction.

  • SbInputVector delta

    The relative motion vector of this input. The value is 0 if this data is not applicable.

  • float pressure

    The normalized pressure of the pointer input in the range of [0,1], where 0 and 1 represent the minimum and maximum pressure the hardware is capable of detecting, respectively. Use NaN for devices that do not report pressure. This value is used for input events with device type mouse or touch screen.

  • SbInputVector size

    The (width, height) of the contact geometry of the pointer. This defines the size of the area under the pointer position. If (NaN, NaN) is specified, the value (0,0) will be used. This value is used for input events with device type mouse or touch screen.

  • SbInputVector tilt

    The (x, y) angle in degrees, in the range of [-90, 90] of the pointer, relative to the z axis. Positive values are for tilt to the right (x), and towards the user (y). Use (NaN, NaN) for devices that do not report tilt. This value is used for input events with device type mouse or touch screen.

  • const char * input_text

    The text to input for events of type Input.

  • bool is_composing

    Set to true if the input event is part of a composition event.


A 2-dimensional vector used to represent points and motion vectors.


  • float x
  • float y