com.nalinstudios.iscan.internal

Class ZoomHandler

java.lang.Object

com.nalinstudios.iscan.internal.ZoomHandler

All Implemented Interfaces:

android.view.ScaleGestureDetector.OnScaleGestureListener, android.view.View.OnTouchListener

public class ZoomHandler
extends java.lang.Object
implements android.view.View.OnTouchListener, android.view.ScaleGestureDetector.OnScaleGestureListener

A class to handle zoom events in the ScannerActivity.

Author:

Nalin Angrish.

Field Summary

Fields

Modifier and Type	Field and Description
private android.hardware.Camera	camera The camera object to apply zoom effects on
private android.view.ScaleGestureDetector	gestureScale The scale gesture detector to detect pinch in and pinch out gestures
private float	scaleFactor The amount to scale

Constructor Summary

Constructors

Constructor and Description
ZoomHandler(android.hardware.Camera camera, android.content.Context c) The default constructor of the zoom detector

Method Summary

Modifier and Type	Method and Description
boolean	onScale(android.view.ScaleGestureDetector detector) The main function to handle the zoom.
boolean	onScaleBegin(android.view.ScaleGestureDetector detector) Blank Function
void	onScaleEnd(android.view.ScaleGestureDetector detector) Blank Function
boolean	onTouch(android.view.View view, android.view.MotionEvent event) A function to activate zoom on the touch events

Methods inherited from class java.lang.Object

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

Field Detail

camera

private android.hardware.Camera camera

The camera object to apply zoom effects on

gestureScale

private android.view.ScaleGestureDetector gestureScale

The scale gesture detector to detect pinch in and pinch out gestures

scaleFactor

private float scaleFactor

The amount to scale

Constructor Detail

ZoomHandler

public ZoomHandler(android.hardware.Camera camera,
                   android.content.Context c)

The default constructor of the zoom detector

Parameters:

camera - The camera to apply zoom effects on.

c - The context of the texture to listen zoo events onto.

Method Detail

onScale

public boolean onScale(android.view.ScaleGestureDetector detector)

The main function to handle the zoom.

Specified by:

onScale in interface android.view.ScaleGestureDetector.OnScaleGestureListener

Parameters:

detector - Detector to get the scale factor to zoom accordingly.

Returns:

true

onScaleBegin

public boolean onScaleBegin(android.view.ScaleGestureDetector detector)

Blank Function

Specified by:

onScaleBegin in interface android.view.ScaleGestureDetector.OnScaleGestureListener

Parameters:

detector - -blank-

Returns:

true

onScaleEnd

public void onScaleEnd(android.view.ScaleGestureDetector detector)

Blank Function

Specified by:

onScaleEnd in interface android.view.ScaleGestureDetector.OnScaleGestureListener

Parameters:

detector - -blank-

onTouch

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

A function to activate zoom on the touch events

Specified by:

onTouch in interface android.view.View.OnTouchListener

Parameters:

view - The view object of the texture

event - The type of motion event.

Returns:

true