colorbar.java

类似腾讯的聊天以及涂鸦的软件等等一系列的东西

import java.awt.*;
import java.awt.event.*;
public class ColorBar extends Scrollbar {//颜色调整
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	public ColorBar( ){
		
		super(Scrollbar.HORIZONTAL,0,40,0,295);
		this.setUnitIncrement(1);
		this.setBlockIncrement(50);
	}
	
	 public static void main(String[] args) {
		 ColorPanel col=new ColorPanel(); 
		 col.setVisible(true);
	 }


}
 class ColorPanel extends Panel implements AdjustmentListener, ActionListener{
	 /**
	 * 
	 */
	 Button b=new Button("确定");
	private static final long serialVersionUID = 1L;
	Scrollbar red=new ColorBar();
	 Scrollbar green=new ColorBar();
	 Scrollbar blue=new ColorBar();
	 Canvas my=new Canvas();//用于反映颜色变化的画布
	 Color color;//用于供调用者获取颜色
	 public ColorPanel(){
		 add("South",b);
		 b.addActionListener(this);
		 Panel x=new Panel();
		 x.setLayout(new GridLayout(3,2,1,1));
		 x.add(new Label("red"));x.add(red);
		 x.add(new Label("green"));x.add(green);
		 x.add(new Label("blue"));x.add(blue);
		 setLayout(new GridLayout(2,1,5,5));
		 add(my);
		 add(x);
		 red.addAdjustmentListener(this);
		 green.addAdjustmentListener(this);
		 blue.addAdjustmentListener(this);
		 
	 }
	 //滚动条调整时，根据调整值改变画布的颜色
	public void adjustmentValueChanged(AdjustmentEvent e) {
		// TODO Auto-generated method stub
		int v1,v2,v3;
		
		v1=red.getValue();
		v2=green.getValue();
		v3=blue.getValue();
		color=new Color(v1,v2,v3);
		my.setBackground(color);
	}
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if (e.getActionCommand( ).equals("确定")){
			
		}
	}
	
 }