textboxcanvas.java

基于j2me的高等代数计算工具

package edu.neu.aatk.textbox;

import javax.microedition.lcdui.Graphics;

import edu.neu.aatk.AATK;
import edu.neu.aatk.canvas.MenuCanvas;

public class TextBoxCanvas extends MenuCanvas {
	private int keyCode;
	private boolean numberPressed = false;
	MyTextBox mtb1 = new MyTextBox(30,50);
	
	public TextBoxCanvas(String title, AATK aatk) {
		super(title, aatk);
	}

	protected void paint(Graphics g) {
		super.paint(g);
		paintLeftCommand(g, "返回");
		paintRightCommand(g, "确定");
		
/*		mtb1.drawTextBox(g);
		if(numberPressed)
			try {
				mtb1.insert(g, keyCode);
			} catch (Exception e) {
				System.out.println(e.getMessage());
			}*/
	}
	
	protected void keyPressed(int keyCode) {
		if(keyCode <= 57 && keyCode >= 48) {
			numberPressed = true;
			this.keyCode = keyCode;
	    	repaint();
	    	serviceRepaints();
		}
		
		switch(keyCode) {
			case -8: //clear
				mtb1.delete();
		    	repaint();
		    	serviceRepaints();
		    	break;
			case -7: //rightkey
				rightKeyClicked = true;
		    	repaint();
		    	serviceRepaints();
				break;
			case -6:
				leftKeyClicked = true;
		    	repaint();
		    	serviceRepaints();
				break;
		}
	}
	
	protected void keyReleased(int keyCode) {
		if(keyCode <= 57 || keyCode >= 48)
			numberPressed = false;
		switch(keyCode) {
			case -7:
				rightKeyClicked = false;
		    	repaint();
		    	serviceRepaints();
				System.out.println(mtb1.getNumber());
				break;
			case -6:
				leftKeyClicked = true;
		    	repaint();
		    	serviceRepaints();
		    	aatk.display.setCurrent(aatk.mainMenuCanvas);
				break;
		}
	}

}