jadomican.a4thyearproject.camera

Class GraphicOverlay.Graphic

java.lang.Object

jadomican.a4thyearproject.camera.GraphicOverlay.Graphic

Direct Known Subclasses:

OcrGraphic

Enclosing class:

GraphicOverlay<T extends GraphicOverlay.Graphic>

public abstract static class GraphicOverlay.Graphic
extends java.lang.Object

Base class for a custom graphics object to be rendered within the graphic overlay. Must be subclassed and implement the draw(Canvas) method to define the graphic element. The add() method is used to add instances to the overlay

Constructor Summary

Constructors

Constructor and Description
Graphic(GraphicOverlay overlay)

Method Summary

Modifier and Type	Method and Description
abstract boolean	contains(float x, float y) Returns true if the supplied coordinates are within this graphic.
abstract void	draw(android.graphics.Canvas canvas) Draw the graphic on the supplied canvas.
void	postInvalidate()
float	scaleX(float horizontal) Adjusts a horizontal value of the supplied value from the preview scale to the view scale.
float	scaleY(float vertical) Adjusts a vertical value of the supplied value from the preview scale to the view scale.
float	translateX(float x) Adjusts the x coordinate from the preview's coordinate system to the view coordinate system.
float	translateY(float y) Adjusts the y coordinate from the preview's coordinate system to the view coordinate system.

Methods inherited from class java.lang.Object

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

Constructor Detail

Graphic

public Graphic(GraphicOverlay overlay)

Method Detail

draw

public abstract void draw(android.graphics.Canvas canvas)

Draw the graphic on the supplied canvas. Drawing uses the following methods to convert to view coordinates for the graphics that are drawn:

scaleX(float) and scaleY(float) adjust the size of the supplied value from the preview scale to the view scale.

translateX(float) and translateY(float) adjust the coordinate from the preview's coordinate system to the view coordinate system.

contains

public abstract boolean contains(float x,
                                 float y)

Returns true if the supplied coordinates are within this graphic.

scaleX

public float scaleX(float horizontal)

Adjusts a horizontal value of the supplied value from the preview scale to the view scale.

scaleY

public float scaleY(float vertical)

Adjusts a vertical value of the supplied value from the preview scale to the view scale.

translateX

public float translateX(float x)

Adjusts the x coordinate from the preview's coordinate system to the view coordinate system.

translateY

public float translateY(float y)

Adjusts the y coordinate from the preview's coordinate system to the view coordinate system.

postInvalidate

public void postInvalidate()