tweenanimatecanvas.java

来自「example2 众多JAVA实例源码...学习java基础的好帮手」· Java 代码 · 共 63 行

package opusmicro.demos.animate2;

import java.util.Vector;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;

public class TweenAnimateCanvas extends Canvas {

	int width;
	int height;
	Vector children = new Vector();
	Component child;
	private int position = 0;
	public TweenAnimateCanvas() {
		this.setFullScreenMode(true);
		width = getWidth();
		height = getHeight();
		
	}
	void pre(){
		if(position>0){
			position--;
		}
		repaint();
		serviceRepaints();
	}
	void next(){
		if(position<1){
			position++;
		}repaint();
		serviceRepaints();
	}
	protected void keyPressed(int keyCode){
		int action = getGameAction(keyCode);
		switch(action){
			case Canvas.UP:pre();break;
			case Canvas.DOWN:next();break;
		}
	}
	
	protected void sizeChanged(int w, int h){
		width = w;
		height = h;
	}
	public void addChild(Component child){
		if(!children.contains(child)) {
			children.addElement(child);
		}
	}
	protected void paint(Graphics g) {
		g.setColor(-1);
		g.fillRect(0, 0, width, height);
		if(!children.isEmpty()){
			for(int i=0;i<children.size();i++){
				child = (Component) children.elementAt(i);
				child.paint(g, i==position );
			}
		}
	}

}