Java Development

[subrat]

Hi All,

Is it possible to add any bitmap image with GaugeField for displaying  progress bar?

Regards

Subrat

[simon_hain]

no.

but implementing your own field is simple enough.

[subrat]

Ok adding Image is not possible .

Implementing own field means what?

Actually I am able to draw a progress bar using GaugeField but it has default look and feel of BlackBerry.

[simon_hain]

you can draw whatever you want if you use low-level access, read the paint method or another graphics context.

you can create a graphics object yourself, from a background bitmap for example, and paint on it.

i would suggest a timertask or a thread to paint your progress bitmap to the correct place.

[subrat]

Code sample if any will be helpful.

[zany · Accepted solution]

Hi,

This is just a sample code, which will do what you need

class ProgressField extends GaugeField {
    private int _progress;

    public ProgressField()
    {
        super();

        _progress = 10;
        UiApplication.getUiApplication().invokeLater(new Runnable() {
            public void run() {
                try {
                    startProgress();
                }
                catch (final Exception e) {
                    System.out.println(e.toString());
                }
            }
        }, 100, true);
    }

    private void startProgress()
    {
        if (_progress > 100)
            return;
        moveProgress();
    }

    private void moveProgress()
    {
            _progress++;
            invalidate();
    }

    public int getPreferredHeight()
    {
        return 75;
    }

    protected void paint (Graphics g)
    {
        g.drawBitmap(0, 0, 100, 75, Bitmap.getBitmapResource("image.png"), 0, 0);
        g.setBackgroundColor(Color.BLACK);
        int xPos = 0;
        for (int i = 0; i < _progress; i += 10)
        {
            g.fillRect(xPos, 45, 8, 10);
            xPos += 10;
        }
    }

    protected void layout(int width, int height) {
        super.layout(width, height);
        setExtent (width, 75);
    }
}

Note: you can modify this code based on your need to make it perfect and proper

[subrat]

Hey it Working thanks buddy.

[chetansh]

Hello,

I have used this code to extend it further.

Inside the invokeLater method I am calling another thread that is doing my ProgressBar background process. I am trying to tie my background process with the each step in the Progress Bar.

The code's like something like this.

ret=UiApplication.getUiApplication().invokeLater(new Runnable() {

public void run() {

try {

init();

ThreadClass c1 = new ThreadClass();

c1.start();

startProgress();

synchronized (c1) {

c1.wait();

}

}

catch (final Exception e) {

System.out.println(e.toString());

}

}

}, 300, true);

I wanted to know is this allowed as I get following error from time to time:

Application XXXXXX(182) is not responding; process terminated

and I feel its this threads that's doing the problem.

KIndly share your views.

Regards,

ChetanSH

[simon_hain]

you are blocking the event thread, this terminates your app.

to submit results from a thread to the UI you could use a callback pattern (google it if you don't know the word)