com.github.mikephil.charting.listener

Class ChartTouchListener<T extends Chart<?>>

java.lang.Object

android.view.GestureDetector.SimpleOnGestureListener

com.github.mikephil.charting.listener.ChartTouchListener<T>

All Implemented Interfaces:

android.view.GestureDetector.OnContextClickListener, android.view.GestureDetector.OnDoubleTapListener, android.view.GestureDetector.OnGestureListener, android.view.View.OnTouchListener

Direct Known Subclasses:

BarLineChartTouchListener, PieRadarChartTouchListener

public abstract class ChartTouchListener<T extends Chart<?>>
extends android.view.GestureDetector.SimpleOnGestureListener
implements android.view.View.OnTouchListener

Created by philipp on 12/06/15.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ChartTouchListener.ChartGesture

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	DRAG
protected T	mChart the chart the listener represents
protected android.view.GestureDetector	mGestureDetector the gesturedetector used for detecting taps and longpresses, ...
protected ChartTouchListener.ChartGesture	mLastGesture the last touch gesture that has been performed
protected Highlight	mLastHighlighted the last highlighted object (via touch)
protected int	mTouchMode integer field that holds the current touch-state
protected static int	NONE
protected static int	PINCH_ZOOM
protected static int	POST_ZOOM
protected static int	ROTATE
protected static int	X_ZOOM
protected static int	Y_ZOOM

Constructor Summary

Constructors

Constructor and Description
ChartTouchListener(T chart)

Method Summary

Modifier and Type	Method and Description
protected static float	distance(float eventX, float startX, float eventY, float startY) returns the distance between two points
void	endAction(android.view.MotionEvent me) Calls the OnChartGestureListener to do the end callback
ChartTouchListener.ChartGesture	getLastGesture() Returns the last gesture that has been performed on the chart.
int	getTouchMode() returns the touch mode the listener is currently in
protected void	performHighlight(Highlight h, android.view.MotionEvent e) Perform a highlight operation.
void	setLastHighlighted(Highlight high) Sets the last value that was highlighted via touch.
void	startAction(android.view.MotionEvent me) Calls the OnChartGestureListener to do the start callback

Methods inherited from class android.view.GestureDetector.SimpleOnGestureListener

onContextClick, onDoubleTap, onDoubleTapEvent, onDown, onFling, onLongPress, onScroll, onShowPress, onSingleTapConfirmed, onSingleTapUp

Methods inherited from class java.lang.Object

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

Methods inherited from interface android.view.View.OnTouchListener

onTouch

Field Detail

mLastGesture

protected ChartTouchListener.ChartGesture mLastGesture

the last touch gesture that has been performed

NONE

protected static final int NONE

See Also:

Constant Field Values

DRAG

protected static final int DRAG

See Also:

Constant Field Values

X_ZOOM

protected static final int X_ZOOM

See Also:

Constant Field Values

Y_ZOOM

protected static final int Y_ZOOM

See Also:

Constant Field Values

PINCH_ZOOM

protected static final int PINCH_ZOOM

See Also:

Constant Field Values

POST_ZOOM

protected static final int POST_ZOOM

See Also:

Constant Field Values

ROTATE

protected static final int ROTATE

See Also:

Constant Field Values

mTouchMode

protected int mTouchMode

integer field that holds the current touch-state

mLastHighlighted

protected Highlight mLastHighlighted

the last highlighted object (via touch)

mGestureDetector

protected android.view.GestureDetector mGestureDetector

the gesturedetector used for detecting taps and longpresses, ...

mChart

protected T extends Chart<?> mChart

the chart the listener represents

Constructor Detail

ChartTouchListener

public ChartTouchListener(T chart)

Method Detail

startAction

public void startAction(android.view.MotionEvent me)

Calls the OnChartGestureListener to do the start callback

Parameters:

me -

endAction

public void endAction(android.view.MotionEvent me)

Calls the OnChartGestureListener to do the end callback

Parameters:

me -

setLastHighlighted

public void setLastHighlighted(Highlight high)

Sets the last value that was highlighted via touch.

Parameters:

high -

getTouchMode

public int getTouchMode()

returns the touch mode the listener is currently in

Returns:

getLastGesture

public ChartTouchListener.ChartGesture getLastGesture()

Returns the last gesture that has been performed on the chart.

Returns:

performHighlight

protected void performHighlight(Highlight h,
                                android.view.MotionEvent e)

Perform a highlight operation.

Parameters:

e -

distance

protected static float distance(float eventX,
                                float startX,
                                float eventY,
                                float startY)

returns the distance between two points

Parameters:

eventX -

startX -

eventY -

startY -

Returns: