kankan.wheel.widget
Class WheelScroller

java.lang.Object
  kankan.wheel.widget.WheelScroller

public class WheelScroller
extends java.lang.Object

Scroller class handles scrolling events and updates the

Nested Class Summary

static interface

WheelScroller.ScrollingListener Scrolling listener interface

Field Summary

private Handler	animationHandler
private Context	context
private GestureDetector	gestureDetector
private SimpleOnGestureListener	gestureListener
private boolean	isScrollingPerformed
private int	lastScrollY
private float	lastTouchedY
private WheelScroller.ScrollingListener	listener
private int	MESSAGE_JUSTIFY
private int	MESSAGE_SCROLL
static int	MIN_DELTA_FOR_SCROLLING Minimum delta for scrolling
private Scroller	scroller
private static int	SCROLLING_DURATION Scrolling duration

Constructor Summary

WheelScroller(Context context, WheelScroller.ScrollingListener listener)
Constructor

Method Summary

private void	clearMessages() Clears messages from queue
(package private) void	finishScrolling() Finishes scrolling
private void	justify() Justifies wheel
boolean	onTouchEvent(MotionEvent event) Handles Touch event
void	scroll(int distance, int time) Scroll the wheel
void	setInterpolator(Interpolator interpolator) Set the the specified scrolling interpolator
private void	setNextMessage(int message) Set next message to queue.
private void	startScrolling() Starts scrolling
void	stopScrolling() Stops scrolling

Methods inherited from class java.lang.Object

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

Field Detail

SCROLLING_DURATION

private static final int SCROLLING_DURATION

Scrolling duration

See Also:

Constant Field Values

MIN_DELTA_FOR_SCROLLING

public static final int MIN_DELTA_FOR_SCROLLING

Minimum delta for scrolling

See Also:

Constant Field Values

listener

private WheelScroller.ScrollingListener listener

context

private Context context

gestureDetector

private GestureDetector gestureDetector

scroller

private Scroller scroller

lastScrollY

private int lastScrollY

lastTouchedY

private float lastTouchedY

isScrollingPerformed

private boolean isScrollingPerformed

gestureListener

private SimpleOnGestureListener gestureListener

MESSAGE_SCROLL

private final int MESSAGE_SCROLL

See Also:

Constant Field Values

MESSAGE_JUSTIFY

private final int MESSAGE_JUSTIFY

See Also:

Constant Field Values

animationHandler

private Handler animationHandler

Constructor Detail

WheelScroller

public WheelScroller(Context context,
                     WheelScroller.ScrollingListener listener)

Constructor

Parameters:

context - the current context

listener - the scrolling listener

Method Detail

setInterpolator

public void setInterpolator(Interpolator interpolator)

Set the the specified scrolling interpolator

Parameters:

interpolator - the interpolator

scroll

public void scroll(int distance,
                   int time)

Scroll the wheel

Parameters:

distance - the scrolling distance

time - the scrolling duration

stopScrolling

public void stopScrolling()

Stops scrolling

onTouchEvent

public boolean onTouchEvent(MotionEvent event)

Handles Touch event

Parameters:

event - the motion event

Returns:

setNextMessage

private void setNextMessage(int message)

Set next message to queue. Clears queue before.

Parameters:

message - the message to set

clearMessages

private void clearMessages()

Clears messages from queue

justify

private void justify()

Justifies wheel

startScrolling

private void startScrolling()

Starts scrolling

finishScrolling

void finishScrolling()

Finishes scrolling