SysPropFullCanvas.java

/*
 * Copyright © 2013 Nokia Corporation. All rights reserved.
 * Nokia and Nokia Connecting People are registered trademarks of Nokia Corporation. 
 * Oracle and Java are trademarks or registered trademarks of Oracle and/or its
 * affiliates. Other product and company names mentioned herein may be trademarks
 * or trade names of their respective owners. 
 * See LICENSE.TXT for license information.
 */
package com.nokia.example.systemproperties;

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

public class SysPropFullCanvas extends Canvas implements CommandListener {

    private SystemProperties midlet;
    private Command backCommand;
    private Command exitCommand;
    private int w, h, fontheight;
    private Font font;
    private String value;

    public SysPropFullCanvas(SystemProperties midlet) {
        this.midlet = midlet;
        this.setFullScreenMode(true);
        backCommand = new Command("Back", Command.BACK, 1);
        //exitCommand = new Command("Exit", Command.EXIT, 1);
        this.setCommandListener(this);
        this.addCommand(backCommand);
        //this.addCommand(exitCommand);
        font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_SMALL);
        fontheight = font.getHeight();
    }

    protected void paint(Graphics g) {
        w = this.getWidth();
        h = this.getHeight();
        g.setColor(255, 255, 255);  // Background color
        g.fillRect(0, 0, w, h);
        g.setColor(0, 0, 0);        // Text color
        g.setFont(font);
        update(SystemProperties.NOKIA_CANVAS_UI, g);
    }

    public void commandAction(Command c, Displayable d) {
        if (c == backCommand) {
            midlet.showList();
        }
        if (c == exitCommand) {
            midlet.notifyDestroyed();
        }
    }

    protected void update(String[] list, Graphics g) {
        int length = list.length;
        for (int i = 0; i < length; i++) {
            value = System.getProperty(list[i]);
            if (value == null) {
                value = "null";
            }
            g.drawString(list[i], 0, (i * 2) * fontheight, Graphics.LEFT | Graphics.TOP);
            g.drawString(value, 0, (i * 2) * fontheight + fontheight, Graphics.LEFT | Graphics.TOP);
        }
    }
}