rainscreenchangeanimation.java

j2me polish学习的经典代码

//#condition polish.usePolishGui && polish.midp2

package de.enough.polish.ui.screenanimations;

import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

import de.enough.polish.ui.AccessibleCanvas;
import de.enough.polish.ui.ScreenChangeAnimation;
import de.enough.polish.ui.Style;

public class RainScreenChangeAnimation extends ScreenChangeAnimation {
	private boolean stillRun = true;
	//the start degrees of the images
	//the nxtImage to start in screen
	private int row ,id;
	private int[] left ,right ,up,down;
	//the rgb - images
	private int[] rgbData ;
	private int[] rgbbuffer ;
	private int[] lstrgbbuffer ;
	//the height of the columns
	private int[] scaleableHeight;
	private int[] scaleableWidth;
 	//the scale from the row
//	//kann nachher weg nur zum testen
//	private boolean first = true;
	public RainScreenChangeAnimation() {
		super();
		// TODO Auto-generated constructor stub
	}
	
	protected void show(Style style, Display dsplay, int width, int height,
			Image lstScreenImage, Image nxtScreenImage, AccessibleCanvas nxtCanvas, Displayable nxtDisplayable  ) 
	{
			System.gc();
			this.id = 12;
			this.row = 0;
			this.stillRun = true;
			int size = width * height;
			this.left = new int [height];
			this.right = new int [height];
			this.scaleableWidth = new int [height];
			for(int i = 0; i < this.scaleableWidth.length;i++){
				this.scaleableWidth[i] = width;
				this.left[i] = 0;
				this.right[i] = width;
			}
			this.up = new int [width];
			this.down = new int [width];
			this.scaleableHeight = new int [width];
			for(int i = 0;i < this.scaleableHeight.length;i++){
				this.scaleableHeight[i] = height;
				this.up[i] = 0;
				this.down[i] = height;
			}
			this.rgbbuffer = new int[size];
			this.lstrgbbuffer = new int [size];
			this.rgbData = new int [size];
			nxtScreenImage.getRGB(this.rgbbuffer, 0, width, 0, 0, width, height );
			lstScreenImage.getRGB(this.lstrgbbuffer, 0, width, 0, 0, width, height );
			lstScreenImage.getRGB(this.rgbData, 0, width, 0, 0, width, height );
			super.show(style, dsplay, width, height, lstScreenImage, nxtScreenImage, nxtCanvas, nxtDisplayable );
	}
	
	
	
	protected boolean animate() {
//		// TODO Auto-generated method stub
//		this.cubeEffect();
//		int row = 0,column = 0;
//		int length = this.rgbData.length-1;
//		int sH,c,scalePercentH,scalePercentWidth,r,newI,sW = 0,left = 0,right = this.screenWidth;
//		scalePercentWidth = this.screenWidth;
//		for(int i = 0; i < length;i++){
//			row = (row + 1) % this.screenWidth;
//			if(row == 0){
//				column++;	
//				left = this.left[column];
//				right = this.right[column];
//				sW = this.scaleableWidth[column];
//				scalePercentWidth = ((sW*100) / this.screenWidth);
//			}
//			sH = this.scaleableHeight[row];
//			
//			if(left > row || right < row || this.down[row] < column || this.up[row] > column){
//				this.rgbData[i] = this.rgbbuffer[i];
//			}
//			else{
//				c = column - (this.screenHeight - sH);
//				if(c < 1)c++;
//				scalePercentH = (((this.screenHeight-((this.screenHeight-sH)))*100)/this.screenHeight);
//				this.row = left + ((this.screenWidth - right)/this.screenWidth);
//				if(this.row <= row){
//					r = row - this.row;
//					scalePercentWidth = (sW*100) / this.screenWidth;
//				}else{
//					r = row;
//					scalePercentWidth = (this.row*100) / this.screenWidth;
//				}
//				
////				if(r < 1)r++;
////				if(sW < 1)sW++;
//				scalePercentWidth = (((this.screenWidth-((this.screenWidth-sW)))*100)/this.screenWidth);
//				if(scalePercentWidth < 1)scalePercentWidth++;
//				if(scalePercentH < 1)scalePercentH++;
//				newI = ((r*100)/scalePercentWidth)+(this.screenWidth * ((c*100)/scalePercentH));
//				if(newI >= length)newI = length;
//				if(newI < 0)newI = 0;
//
//				this.rgbData[i] = this.lstrgbbuffer[newI];
//			}
		// TODO Auto-generated method stub
		this.cubeEffect();
		int length = this.rgbData.length-1;
		int sH,c,scalePercentH,scalePercentWidth,r,newI,sW = 0,left = 0,right = this.screenWidth;
		scalePercentWidth = this.screenWidth;
		for(int y = 0; y < this.screenHeight;y++){
				left = this.left[y];
				right = this.right[y];
				sW = this.scaleableWidth[y];
				scalePercentWidth = ((sW*100) / this.screenWidth);
				int column = y*this.screenWidth;
				for(int x = 1; x < this.screenWidth;x++){
//					System.out.print(y*x+"\n");
					sH = this.scaleableHeight[x];
					
					if(left > x || right < x || this.down[x] < y || this.up[x] > y){
						this.rgbData[column+x] = this.rgbbuffer[column+x];
					}
					else{
						c = y - (this.screenHeight - sH);
						if(c < 1)c++;
						scalePercentH = (((this.screenHeight-((this.screenHeight-sH)))*100)/this.screenHeight);
						this.row = left + ((this.screenWidth - right)/this.screenWidth);
						if(this.row <= x){
							r = x - this.row;
							scalePercentWidth = (sW*100) / this.screenWidth;
						}else{
							r = x;
							scalePercentWidth = (this.row*100) / this.screenWidth;
						}
						
//						if(r < 1)r++;
//						if(sW < 1)sW++;
						scalePercentWidth = (((this.screenWidth-((this.screenWidth-sW)))*100)/this.screenWidth);
						if(scalePercentWidth < 1)scalePercentWidth++;
						if(scalePercentH < 1)scalePercentH++;
						newI = ((r*100)/scalePercentWidth)+(this.screenWidth * ((c*100)/scalePercentH));
						if(newI >= length)newI = length;
						if(newI < 0)newI = 0;

						this.rgbData[x+column] = this.lstrgbbuffer[newI];
					}	
				}
				

		}
		
		if(this.scaleableHeight[this.scaleableHeight.length-1] <= 0)this.stillRun = false;
		return this.stillRun;
	}
	
	
	private void cubeEffect(){		
		for(int i = 0; i < this.id;i++){
			if(this.scaleableHeight[i] > 0){
				this.scaleableHeight[i]-=20;
				this.up[i]+=20;
			}	
			
		}
		this.id+=12;
		if(id > this.screenWidth)this.id = this.scaleableHeight.length;
	}
	
	public void keyPressed(int keyCode) {
		super.keyPressed(keyCode);
		this.nextCanvasImage.getRGB( this.rgbbuffer, 0, this.screenWidth, 0, 0, this.screenWidth, this.screenHeight );
	}

	//#if polish.hasPointerEvents
	//# public void pointerPressed(int x, int y) {
		//# super.pointerPressed(x, y);
		//# this.nextCanvasImage.getRGB( this.rgbbuffer, 0, this.screenWidth, 0, 0, this.screenWidth, this.screenHeight );
	//# }
	//#endif
	
	public void paint(Graphics g) {
		g.drawRGB(this.rgbData,0,this.screenWidth,0,0,this.screenWidth,this.screenHeight,false);
		this.display.callSerially( this );
	}

}