displaycanvas.java

J2ME MIDP_Example_Applications

// Copyright 2002 Nokia Corporation. 
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// unnamed package

import javax.microedition.lcdui.*;


class DisplayCanvas
    extends Canvas
    implements CommandListener
{
    private final CameraMIDlet midlet;

    private Image image = null;


    DisplayCanvas(CameraMIDlet midlet)
    {
        this.midlet = midlet;

        addCommand(new Command("Back", Command.BACK, 1));
        setCommandListener(this);
    }


    public void paint(Graphics g)
    {
        g.setColor(0x0000FFFF);   // cyan
        g.fillRect(0, 0, getWidth(), getHeight());
        if (image != null)
        {
            g.drawImage(image,
                        getWidth()/2,
                        getHeight()/2,
                        Graphics.VCENTER | Graphics.HCENTER);
        }
    }


    void setImage(byte[] pngImage)
    {
        image = Image.createImage(pngImage, 0, pngImage.length);
    }


    public void commandAction(Command c, Displayable d)
    {
        midlet.displayCanvasBack();
    }
}