softbutton.java

example2 众多JAVA实例源码...学习java基础的好帮手

package opusmicro.demos.gray;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

public class SoftButton {

	protected Command leftCommand;
	protected Command rightCommand;
	protected CommandListener listener;
	protected Displayable displayable;
	private int commandBackgroundColor = 0x7FFFD4;
	public SoftButton() {
		
	}
	public void init(Displayable displayable, Font font,Command leftCommand,Command rightCommand){
		this.displayable = displayable;
		if(leftCommand!=null){
			this.setLeftCommand(leftCommand);
		}
		if(rightCommand!=null){
			this.setRightCommand(rightCommand);
		}
	}
	
	public void keyPressed(int keyCode){

		if ( keyCode == -6) {
			if ( leftCommand != null && listener != null) {
				listener.commandAction(leftCommand, displayable);
			}
		}
		else if ( keyCode == -7) {
			if ( rightCommand != null && listener != null) {
				listener.commandAction(rightCommand, displayable);
			}
		}
	
	}
	
	public void paint(Graphics g){
		if(leftCommand!=null){
			g.setColor(commandBackgroundColor);
			g.fillRect(1, displayable.getHeight()-21, 40, 20);
			paintCommand(g,leftCommand,true);
		}
		if(rightCommand!=null){
			g.setColor(commandBackgroundColor);
			g.fillRect(displayable.getWidth()-40, displayable.getHeight()-21, 40, 20);
			paintCommand(g,rightCommand,false);
		}
		
	}
	private void paintCommand(Graphics g, Command command,boolean enableLeft){
		g.setColor(0x242424);
		if(enableLeft){
			g.drawString(command.getLabel(), 2, displayable.getHeight()-20, 0);
		}
//		g.setColor(0x242424);
		if(!enableLeft){
			g.drawString(command.getLabel(), displayable.getWidth()-39, displayable.getHeight()-20, 0);
		}
		
	}
	
	public Command getLeftCommand() {
		return leftCommand;
	}
	public void setLeftCommand(Command leftCommand) {
		this.leftCommand = leftCommand;
	}
	public Command getRightCommand() {
		return rightCommand;
	}
	public void setRightCommand(Command rightCommand) {
		this.rightCommand = rightCommand;
	}
	public CommandListener getCommandListener() {
		return listener;
	}
	public void setCommandListener(CommandListener listener) {
		this.listener = listener;
	}
}