com.androidplot.xy

Class PanZoom

java.lang.Object

com.androidplot.xy.PanZoom

All Implemented Interfaces:

android.view.View.OnTouchListener

public class PanZoom
extends Object
implements android.view.View.OnTouchListener

Enables basic pan/zoom touch behavior for an XYPlot. TODO: zoom using dynamic center point TODO: stretch both mode

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	PanZoom.DragState
static class	PanZoom.Pan
static class	PanZoom.Zoom

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PanZoom(XYPlot plot, PanZoom.Pan pan, PanZoom.Zoom zoom)

Method Summary

Modifier and Type	Method and Description
static PanZoom	attach(XYPlot plot) Convenience method for enabling pan/zoom behavior on an instance of XYPlot, using a default behavior of PanZoom.Pan.BOTH and PanZoom.Zoom.SCALE.
static PanZoom	attach(XYPlot plot, PanZoom.Pan pan, PanZoom.Zoom zoom)
protected void	calculatePan(android.graphics.PointF oldFirstFinger, android.graphics.PointF newX, boolean horizontal)
protected void	calculateZoom(android.graphics.RectF newRect, float scale, boolean isHorizontal)
android.view.View.OnTouchListener	getDelegate()
protected float	getLastMaxX()
protected float	getLastMinX()
protected float	getLastMinY()
protected float	getMaxXLimit()
protected float	getMaxYLimit()
protected float	getMinYLimit()
PanZoom.Pan	getPan()
PanZoom.Zoom	getZoom()
boolean	isEnabled()
protected boolean	isValidScale(float scale)
boolean	onTouch(android.view.View view, android.view.MotionEvent event)
protected void	pan(android.view.MotionEvent motionEvent)
void	setDelegate(android.view.View.OnTouchListener delegate) Set a delegate to receive onTouch calls before this class does.
protected void	setDomainBoundaries(Number lowerBoundary, BoundaryMode lowerBoundaryMode, Number upperBoundary, BoundaryMode upperBoundaryMode)
protected void	setDomainBoundaries(Number lowerBoundary, Number upperBoundary, BoundaryMode mode)
void	setEnabled(boolean enabled)
void	setPan(PanZoom.Pan pan)
protected void	setRangeBoundaries(Number lowerBoundary, BoundaryMode lowerBoundaryMode, Number upperBoundary, BoundaryMode upperBoundaryMode)
protected void	setRangeBoundaries(Number lowerBoundary, Number upperBoundary, BoundaryMode mode)
void	setZoom(PanZoom.Zoom zoom)
protected void	zoom(android.view.MotionEvent motionEvent)

Methods inherited from class java.lang.Object

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

Constructor Detail

PanZoom

protected PanZoom(XYPlot plot,
                  PanZoom.Pan pan,
                  PanZoom.Zoom zoom)

Method Detail

attach

public static PanZoom attach(XYPlot plot)

Convenience method for enabling pan/zoom behavior on an instance of XYPlot, using a default behavior of PanZoom.Pan.BOTH and PanZoom.Zoom.SCALE. Use attach(XYPlot, Pan, Zoom) for finer grain control of this behavior.

Parameters:

plot -

Returns:

attach

public static PanZoom attach(XYPlot plot,
                             PanZoom.Pan pan,
                             PanZoom.Zoom zoom)

isEnabled

public boolean isEnabled()

setEnabled

public void setEnabled(boolean enabled)

setDomainBoundaries

protected void setDomainBoundaries(Number lowerBoundary,
                                   BoundaryMode lowerBoundaryMode,
                                   Number upperBoundary,
                                   BoundaryMode upperBoundaryMode)

setRangeBoundaries

protected void setRangeBoundaries(Number lowerBoundary,
                                  BoundaryMode lowerBoundaryMode,
                                  Number upperBoundary,
                                  BoundaryMode upperBoundaryMode)

setDomainBoundaries

protected void setDomainBoundaries(Number lowerBoundary,
                                   Number upperBoundary,
                                   BoundaryMode mode)

setRangeBoundaries

protected void setRangeBoundaries(Number lowerBoundary,
                                  Number upperBoundary,
                                  BoundaryMode mode)

onTouch

public boolean onTouch(android.view.View view,
                       android.view.MotionEvent event)

Specified by:

onTouch in interface android.view.View.OnTouchListener

getMaxXLimit

protected float getMaxXLimit()

getMinYLimit

protected float getMinYLimit()

getMaxYLimit

protected float getMaxYLimit()

getLastMinX

protected float getLastMinX()

getLastMaxX

protected float getLastMaxX()

getLastMinY

protected float getLastMinY()

pan

protected void pan(android.view.MotionEvent motionEvent)

calculatePan

protected void calculatePan(android.graphics.PointF oldFirstFinger,
                            android.graphics.PointF newX,
                            boolean horizontal)

isValidScale

protected boolean isValidScale(float scale)

zoom

protected void zoom(android.view.MotionEvent motionEvent)

calculateZoom

protected void calculateZoom(android.graphics.RectF newRect,
                             float scale,
                             boolean isHorizontal)

getPan

public PanZoom.Pan getPan()

setPan

public void setPan(PanZoom.Pan pan)

getZoom

public PanZoom.Zoom getZoom()

setZoom

public void setZoom(PanZoom.Zoom zoom)

getDelegate

public android.view.View.OnTouchListener getDelegate()

setDelegate

public void setDelegate(android.view.View.OnTouchListener delegate)

Set a delegate to receive onTouch calls before this class does. If the delegate wishes to consume the event, it should return true, otherwise it should return false. Returning false will not prevent future onTouch events from filtering through the delegate as it normally would when attaching directly to an instance of View.

Parameters:

delegate -