Using navigationMovement() as a trackpad/trackball mouse

Greettings and regards other developers. a few quick details I use the blackberry JDE 5.0 on Eclipse Galileo, I created a method of mouse for pavers and balls. Try to expand my horizons of sale, two possible losses haunt my thoughts.

side 1: the mouse works fine until you roll two directions at once, example left and upwards at the same time moves alone, he left or up not both.

side 2: the touchpad does not roll like the balloon, this method will probably fine work for the ball, but not the key.

This is the code for my navigationMovement() method

protected boolean navigationMovement(int dx,int dy,int status,int time)
    {
        super.navigationMovement(dx, dy, status, time);
        if (!mouseOn)                               //places mouse on first run but doesnt repeat
            {
            mouses.addElement(new Sprite(Utility.SCREEN_WIDTH / 2, Utility.SCREEN_HEIGHT / 2));
            mouseOn = true;
            }
        Sprite f = (Sprite) mouses.firstElement();           //sprite class updates x and y coordinates                                                                               //Focussing on the x/y of the mouse(i know using a vector is silly here)
        f.x+= (dx * 10);
        f.y+= (dy * 10);    //moves the mouse according to dx/dy input

        if((f.x + mouse.getWidth()) > Utility.SCREEN_WIDTH) f.x = Utility.SCREEN_WIDTH - mouse.getWidth();
        else if(f.x < 0) f.x = 0;
        if((f.y + mouse.getHeight()) > Utility.SCREEN_HEIGHT) f.y = Utility.SCREEN_HEIGHT - mouse.getHeight();
        else if(f.y < 0) f.y = 0;        //keeps the mouse from scrolling off screen

        invalidate();     //update screen
        return true;
    }

Is there a way to make the trackpad act as the trackball with this method, or it will be slow and jerky? I know that the trackpads have magnitude and direction. So I hope that's not too bad, it seems to work on the Simulator, but I need a tester phone or real app ready to try this for me.

More importantly, how do I get the mouse to move both directions if the ball goes both directions? I have some ideas on what may be an if statement to check if both directions are going at once, then run both directions. But it seems that both must be running.

Thanks in advance.

-Andy

I just realized this post was a little out of place, thanks to blackberry api I got including this one.

Tags: BlackBerry Developers

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Using navigationMovement() as a trackpad/trackball mouse

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