ch.hevs.gdx2d.lib.interfaces

Interface GestureInterface

All Known Implementing Classes:

PortableApplication, RenderingScreen

public interface GestureInterface

An interface that applications implement to interact with screen gestures on Android.

Version:

1.0

Author:

Christopher Métrailler (mei)

See Also:

GestureDetector.GestureListener

Method Summary

Modifier and Type	Method and Description
void	onFling(float velocityX, float velocityY, int button) Called when the user dragged a finger over the screen and lifted it.
void	onLongPress(float x, float y) Called on long press on Android.
void	onPan(float x, float y, float deltaX, float deltaY) Called when the user drags a finger over the screen on Android.
void	onPinch(Vector2 initialPointer1, Vector2 initialPointer2, Vector2 pointer1, Vector2 pointer2) Called when a user performs a pinch zoom gesture on Android.
void	onTap(float x, float y, int count, int button) Invoked for a tap gesture on Android.
void	onZoom(float initialDistance, float distance) Called when the user performs a pinch zoom gesture on Android.

Method Detail

onZoom

void onZoom(float initialDistance,
            float distance)

Called when the user performs a pinch zoom gesture on Android.

The original distance is the distance in pixels when the gesture started.

Parameters:

initialDistance - distance between fingers when the gesture started

distance - current distance between fingers

onTap

void onTap(float x,
           float y,
           int count,
           int button)

Invoked for a tap gesture on Android.

A tap happens if a touch went down on the screen and was lifted again without moving outside of the tap square.

Parameters:

x - the screen X coordinate (origin is the lower left corner)

y - the screen Y coordinate (origin is the lower left corner)

count - the number of taps

button - Input.Buttons.LEFT or Input.Buttons.RIGHT button clicked

onPinch

void onPinch(Vector2 initialPointer1,
             Vector2 initialPointer2,
             Vector2 pointer1,
             Vector2 pointer2)

Called when a user performs a pinch zoom gesture on Android. Reports the initial positions of the two involved fingers and their current positions.

Parameters:

initialPointer1 - finger 1 initial position

initialPointer2 - finger 2 initial position

pointer1 - finger 1 current position

pointer2 - finger 2 current position

onPan

void onPan(float x,
           float y,
           float deltaX,
           float deltaY)

Called when the user drags a finger over the screen on Android.

Parameters:

x - the screen X coordinate (origin is the lower left corner)

y - the screen Y coordinate (origin is the lower left corner)

deltaX - the difference in pixels to the last drag event on x

deltaY - the difference in pixels to the last drag event on y

onLongPress

void onLongPress(float x,
                 float y)

Called on long press on Android.

Parameters:

x - the screen X coordinate (origin is the lower left corner)

y - the screen Y coordinate (origin is the lower left corner)

onFling

void onFling(float velocityX,
             float velocityY,
             int button)

Called when the user dragged a finger over the screen and lifted it. Reports the last known velocity of the finger in pixels per second.

Parameters:

velocityX - velocity on the X axis in seconds

velocityY - velocity on the Y axis in seconds

button - Input.Buttons.LEFT or Input.Buttons.RIGHT button clicked