lecho.lib.hellocharts.gesture

Class PieChartTouchHandler

java.lang.Object

lecho.lib.hellocharts.gesture.ChartTouchHandler

lecho.lib.hellocharts.gesture.PieChartTouchHandler

public class PieChartTouchHandler
extends ChartTouchHandler

Touch handler for PieChart. It doesn't handle zoom and scroll like default ChartTouchHandler. Instead it uses Scroller(ScrollerCompat) directly to compute PieChart rotation when user scroll. ChartScroller and ChartZoomer are not really used here.

Field Summary

Fields

Modifier and Type	Field and Description
static int	FLING_VELOCITY_DOWNSCALE The initial fling velocity is divided by this amount.
protected PieChartView	pieChart Reference to PieChartView to use some methods specific for that kind of chart.
protected ScrollerCompat	scroller PieChartTouchHandler uses its own instance of Scroller.

Fields inherited from class lecho.lib.hellocharts.gesture.ChartTouchHandler

chart, chartScroller, chartZoomer, computator, containerScrollType, gestureDetector, isScrollEnabled, isValueSelectionEnabled, isValueTouchEnabled, isZoomEnabled, oldSelectedValue, renderer, scaleGestureDetector, selectedValue, selectionModeOldValue, viewParent

Constructor Summary

Constructors

Constructor and Description
PieChartTouchHandler(android.content.Context context, PieChartView chart)

Method Summary

Modifier and Type	Method and Description
boolean	computeScroll() Computes scroll and zoom using ChartScroller and ChartZoomer.
boolean	handleTouchEvent(android.view.MotionEvent event) Handle chart touch event(gestures, clicks).
boolean	isRotationEnabled()
void	setRotationEnabled(boolean isRotationEnabled)

Methods inherited from class lecho.lib.hellocharts.gesture.ChartTouchHandler

getZoomType, handleTouchEvent, isScrollEnabled, isValueSelectionEnabled, isValueTouchEnabled, isZoomEnabled, resetTouchHandler, setScrollEnabled, setValueSelectionEnabled, setValueTouchEnabled, setZoomEnabled, setZoomType

Methods inherited from class java.lang.Object

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

Field Detail

FLING_VELOCITY_DOWNSCALE

public static final int FLING_VELOCITY_DOWNSCALE

The initial fling velocity is divided by this amount.

See Also:

Constant Field Values

scroller

protected ScrollerCompat scroller

PieChartTouchHandler uses its own instance of Scroller.

pieChart

protected PieChartView pieChart

Reference to PieChartView to use some methods specific for that kind of chart.

Constructor Detail

PieChartTouchHandler

public PieChartTouchHandler(android.content.Context context,
                            PieChartView chart)

Method Detail

computeScroll

public boolean computeScroll()

Description copied from class: ChartTouchHandler

Computes scroll and zoom using ChartScroller and ChartZoomer. This method returns true if scroll/zoom was computed and chart needs to be invalidated.

Overrides:

computeScroll in class ChartTouchHandler

handleTouchEvent

public boolean handleTouchEvent(android.view.MotionEvent event)

Description copied from class: ChartTouchHandler

Handle chart touch event(gestures, clicks). Return true if gesture was handled and chart needs to be invalidated.

Overrides:

handleTouchEvent in class ChartTouchHandler

isRotationEnabled

public boolean isRotationEnabled()

setRotationEnabled

public void setRotationEnabled(boolean isRotationEnabled)