/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* *
* AndroidWorld Library, Copyright 2011 Bryan Chadwick *
* *
* FILE: ./android/image/Scene.java *
* *
* This file is part of AndroidWorld. *
* *
* AndroidWorld is free software: you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation, either version *
* 3 of the License, or (at your option) any later version. *
* *
* AndroidWorld is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with AndroidWorld. If not, see . *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
package android.image;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.world.Posn;
/**
*
*
* An abstract Class representing a Scene (a cropped Image). Images
* can be placed on a Scene at a specific location, resulting in a
* new Scene.
*
*
* new EmptyScene(48, 48).placeImage(new Triangle(32, "solid", "red"), 24, 24)
* 
*
*
*
* new EmptyScene(48, 48).placeImage(new Triangle(64, "solid", "red"), 24, 24)
* 
*
*
*
* new EmptyScene(48, 48).addLine(0, 0, 48, 48, "blue")
* 
*
*
*
* new EmptyScene(48, 48).addLine(4, 24, 44, 24, "green")
* 
*
*
*
* new EmptyScene(50, 50)
* .placeImage(new Overlay(new Circle(20, "outline", "black"),
* new Circle(20, "solid", "wheat")), 25, 25)
* .placeImage(new Circle(5, "solid", "lightblue"), 18, 20)
* .placeImage(new Rectangle(10, 3, "solid", "lightblue"), 33, 20)
* .placeImage(new Ellipse(20, 8, "solid", "red"), 25, 35)
* 
*
*/
public abstract class Scene extends Image{
protected Scene(){ super(0,0); }
/** Draw the scene into a Graphics */
public abstract void paint(Canvas c, int x, int y);
/** Place another Image on top of this Scene at (x,y) */
public Scene placeImage(Image i, double x, double y){
return new Placed(i,(int)x,(int)y,this);
}
/** Place another Image on top of this Scene at (x,y) */
public Scene placeImage(Image i, int x, int y){ return new Placed(i,x,y,this); }
/** Place another Image on top of this Scene at the given Posn */
public Scene placeImage(Image i, Posn p){ return new Placed(i,p.x,p.y,this); }
/** Add a line to this Scene from (x,y) to (xx, yy) */
public Scene addLine(int x, int y, int xx, int yy, String color){
return this.addLine((double)x, y, xx, yy, color);
}
/** Add a line to this Scene from (x,y) to (xx, yy) */
public Scene addLine(double x, double y, double xx, double yy, String color){
return this.placeImage(new Line(xx-x, yy-y, color),
(xx+x)/2, (yy+y)/2);
}
/** Add a line to this Scene from the first Posn to the second */
public Scene addLine(Posn p1, Posn p2, String color){
return this.placeImage(new Line(p2.x-p1.x, p2.y-p1.y, color),
(p2.x+p1.x)/2, p2.y+p1.y/2);
}
/** Represents an Image Placed on top of a Scene at offset X/Y */
private static class Placed extends Scene{
private Image img;
private double x;
private double y;
private Scene next;
Placed(Image img, int x, int y, Scene next){
this(img, (double)x, y, next);
}
Placed(Image img, double x, double y, Scene next){
this.img = img;
this.x = x;
this.y = y;
this.next = next;
}
/** Paint the next scene, then place the image on top */
public void paint(Canvas c, int xx, int yy){
next.paint(c,xx,yy);
img.paint(c,round(xx+x),round(yy+y));
}
/** Calculate the width of the combined Scene/Image */
public int width(){ return next.width(); }
/** Calculate the height of the combined Scene/Image */
public int height(){ return next.height(); }
}
/** Save this Scene to a File */
public boolean toFile(String name){
try{
RasterImage rast = this.rasterize();
int dot = name.lastIndexOf('.');
String ext = name.substring(dot+1);
java.io.FileOutputStream out = new java.io.FileOutputStream(name);
// Android appears to only have JPEG and PNG
rast.img.compress((ext.toLowerCase().equals("png"))?
Bitmap.CompressFormat.PNG:
Bitmap.CompressFormat.JPEG, 100, out);
return true;
}catch(Exception e){
throw new RuntimeException(e);
}
}
}