ZoomHandler (IScan - The Indian Scanner App || Source Documentation)

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

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

Method Summary

All Methods Instance Methods Concrete Methods
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

Class ZoomHandler

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

camera

gestureScale

scaleFactor

Constructor Detail

ZoomHandler

Method Detail

onScale

onScaleBegin

onScaleEnd

onTouch