inputxycanvas.java

基于j2me的高等代数计算工具

package edu.neu.aatk.canvas;

import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

import edu.neu.aatk.AATK;
import edu.neu.aatk.textbox.MyTextBox;

public class InputXYCanvas extends AATKCanvas {
	public int keyCode;
	public int focus=  0;
	public static final int count = 2;
	public boolean numberPressed = false;
	private String info = "use setInfo(String str)";
	public MyTextBox mtb0 = new MyTextBox(70,100);
	public MyTextBox mtb1 = new MyTextBox(120,100);
	public MyTextBox[] mtbs = {mtb0, mtb1};
	
	
	public InputXYCanvas(String title, AATK aatk) {
		super(title, aatk);
	}

	protected void paint(Graphics g) {
		super.paint(g);
		paintLeftCommand(g, "返回");
		paintRightCommand(g, "确定");
		paintInfo(g);
		paintBox(g);
	}
	
	protected void paintBox(Graphics g) {
		Font font = Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_PLAIN, 
				Font.SIZE_LARGE);
		g.setFont(font);
		
		mtb0.drawTextBox(g);
		g.drawString("行", 100, 100, Graphics.LEFT | Graphics.TOP);
		mtb1.drawTextBox(g);
		g.drawString("列", 150, 100, Graphics.LEFT | Graphics.TOP);
		
		if(numberPressed) {
			try {
				mtbs[focus].insert(g, keyCode);
			} catch (Exception e) {
				System.out.println(e.getMessage());
			}
		}
		mtb0.drawString(g);
		mtb1.drawString(g);
		mtbs[focus].focused(g);
	}
	
	protected void paintInfo(Graphics g) {
		Font font = Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_UNDERLINED, 
				Font.SIZE_LARGE);
		g.setColor(0, 0, 0);
		g.setFont(font);
		g.drawString(info, 120, 50, Graphics.TOP | Graphics.HCENTER);
	}
	
	public void setInfo(String str) {
		info = str;
	}


}