inputmatrixcanvas.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 javax.microedition.lcdui.Image;

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

public class InputMatrixCanvas extends AATKCanvas {
	public int xValue;
	public int yValue;
	public int xFocus = 0;
	public int yFocus = 0;
	private String info = "use setInfo(String str)";
	
	public boolean numberPressed = false;
	public int keyCode;
	
	public MyTextBox[][] mtbs;
	
	public InputMatrixCanvas(String title, AATK aatk, int xValue, int yValue) {
		super(title, aatk);
		this.xValue = xValue;
		this.yValue = yValue;
		
		int xPos = 5;
		int yPos = 75;
		mtbs = new MyTextBox[xValue][yValue];
		for(int i = 0; i < xValue; i ++) {
			for (int j = 0; j < yValue; j ++) {
				mtbs[i][j] = new MyTextBox(xPos,yPos);
				xPos += MyTextBox.WIDTH + 5;
			}
			yPos += MyTextBox.HEIGHT + 5;
			xPos = 5;
		}
	}
	
	public void setInfo(String str) {
		info = str;
	}

	protected void paint(Graphics g) {
		super.paint(g);
		paintInfo(g);
		paintLeftCommand(g, "返回");
		paintRightCommand(g, "确定");
		paintGrayBox(g);
		paintBox(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);
	}
	
	protected void paintGrayBox(Graphics g) {
		int xPos = 5;
		int yPos = 75;
		
		g.setColor(200, 200, 200);
		for(int i = 0; i < 8; i ++) {
			for (int j = 0; j < 8; j ++) {
				g.drawRect(xPos, yPos, MyTextBox.WIDTH, MyTextBox.HEIGHT);
				xPos += MyTextBox.WIDTH + 5;
			}
			yPos += MyTextBox.HEIGHT + 5;
			xPos = 5;
		}
	}
	
	protected void paintBox(Graphics g) {
		for(int i = 0; i < xValue; i ++) {
			for (int j = 0; j < yValue; j ++) {
				mtbs[i][j].drawTextBox(g);
				mtbs[i][j].drawString(g);
			}
		}
		if(numberPressed) {
			try {
				mtbs[xFocus][yFocus].insert(g, keyCode);
			} catch (Exception e) {
				System.out.println(e.getMessage());
			}
		}
		mtbs[xFocus][yFocus].focused(g);
	}

}