com.palmap.gl.gestures

类 TwoFingerGestureDetector

java.lang.Object

com.palmap.gl.gestures.BaseGestureDetector

com.palmap.gl.gestures.TwoFingerGestureDetector

直接已知子类:

RotateGestureDetector, ShoveGestureDetector

public abstract class TwoFingerGestureDetector
extends BaseGestureDetector

字段概要

字段

限定符和类型	字段和说明
protected float	currFingerDiffX
protected float	currFingerDiffY
protected float	prevFingerDiffX
protected float	prevFingerDiffY

从类继承的字段 com.palmap.gl.gestures.BaseGestureDetector

context, currEvent, currPressure, gestureInProgress, PRESSURE_THRESHOLD, prevEvent, prevPressure, timeDelta

构造器概要

构造器

构造器和说明
TwoFingerGestureDetector(android.content.Context context)

方法概要

限定符和类型	方法和说明
static android.graphics.PointF	determineFocalPoint(android.view.MotionEvent motionEvent) Determine (multi)finger focal point (a.k.a. center point between all fingers)
float	getCurrentSpan() Return the current distance between the two pointers forming the gesture in progress.
float	getFocusX()
float	getFocusY()
float	getPreviousSpan() Return the previous distance between the two pointers forming the gesture in progress.
protected static float	getRawX(android.view.MotionEvent event, int pointerIndex) MotionEvent has no getRawX(int) method; simulate it pending future API approval.
protected static float	getRawY(android.view.MotionEvent event, int pointerIndex) MotionEvent has no getRawY(int) method; simulate it pending future API approval.
protected abstract void	handleInProgressEvent(int actionCode, android.view.MotionEvent event) Called when the current event occurred when a gesture IS in progress.
protected abstract void	handleStartProgressEvent(int actionCode, android.view.MotionEvent event) Called when the current event occurred when NO gesture is in progress yet.
protected boolean	isSloppyGesture(android.view.MotionEvent event) Check if we have a sloppy gesture.
protected void	updateStateByEvent(android.view.MotionEvent curr)

从类继承的方法 com.palmap.gl.gestures.BaseGestureDetector

getEventTime, getTimeDelta, isInProgress, onTouchEvent, resetState

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

prevFingerDiffX

protected float prevFingerDiffX

prevFingerDiffY

protected float prevFingerDiffY

currFingerDiffX

protected float currFingerDiffX

currFingerDiffY

protected float currFingerDiffY

构造器详细资料

TwoFingerGestureDetector

public TwoFingerGestureDetector(android.content.Context context)

方法详细资料

handleStartProgressEvent

protected abstract void handleStartProgressEvent(int actionCode,
                                                 android.view.MotionEvent event)

从类复制的说明: BaseGestureDetector

Called when the current event occurred when NO gesture is in progress yet. The handling in this implementation may set the gesture in progress (via gestureInProgress) or out of progress

指定者:

handleStartProgressEvent 在类中 BaseGestureDetector

参数:

actionCode - Action Code from MotionEvent

event - MotionEvent

handleInProgressEvent

protected abstract void handleInProgressEvent(int actionCode,
                                              android.view.MotionEvent event)

从类复制的说明: BaseGestureDetector

Called when the current event occurred when a gesture IS in progress. The handling in this implementation may set the gesture out of progress (via gestureInProgress).

指定者:

handleInProgressEvent 在类中 BaseGestureDetector

参数:

actionCode - Action Code from MotionEvent

event - MotionEvent

updateStateByEvent

protected void updateStateByEvent(android.view.MotionEvent curr)

覆盖:

updateStateByEvent 在类中 BaseGestureDetector

getCurrentSpan

public float getCurrentSpan()

Return the current distance between the two pointers forming the gesture in progress.

返回:

Distance between pointers in pixels.

getPreviousSpan

public float getPreviousSpan()

Return the previous distance between the two pointers forming the gesture in progress.

返回:

Previous distance between pointers in pixels.

getRawX

protected static float getRawX(android.view.MotionEvent event,
                               int pointerIndex)

MotionEvent has no getRawX(int) method; simulate it pending future API approval.

参数:

event - Motion Event

pointerIndex - Pointer Index

返回:

Raw x value or 0

getRawY

protected static float getRawY(android.view.MotionEvent event,
                               int pointerIndex)

MotionEvent has no getRawY(int) method; simulate it pending future API approval.

参数:

event - Motion Event

pointerIndex - Pointer Index

返回:

Raw y value or 0

isSloppyGesture

protected boolean isSloppyGesture(android.view.MotionEvent event)

Check if we have a sloppy gesture. Sloppy gestures can happen if the edge of the user's hand is touching the screen, for example.

参数:

event - Motion Event

返回:

true if is sloppy gesture, false if not

determineFocalPoint

public static android.graphics.PointF determineFocalPoint(android.view.MotionEvent motionEvent)

Determine (multi)finger focal point (a.k.a. center point between all fingers)

参数:

motionEvent - Motion Event

返回:

PointF focal point

getFocusX

public float getFocusX()

getFocusY

public float getFocusY()