[raj_ba03]

Hi,
My problem is i want to scroll a image on canvas class to do that iam using a loop but the problem is the image is coming down at a time instead it must move down slowly,and if iam using threads to control paint method ,repaint is not calling paint.Its urgent if some one has idea regarding it pls helpme.

[soku123]

Hi,
Please check this link

http://www.microjava.com/developer/f...ontent_id=1835

Hope this will help you.

Thanks
Soku

[raj_ba03]

Hi,
But it scroll only background image i want to scroll image on constant backroung.

[wang_shui]

Hi raj,

Are u referring to a ticker like image scrolling??

U have to draw the image over the background image. Just change the x & y coordinate as u like. It will be better if u use a thread or a timer task.


Wang

[soku123]

Hi,
If you want to move an image over a background that doesnt change,then just
alter the X & Y co-ordinates of the image and just dont alter the background positions.

Thanks
Soku

[balagopalks]

Hi raj_ba03! Welcome to Nokia Discussion Boards!! :)

Here is the code that will work fine for vertical scrolling of an image in the Res folder
If you want to make horizontal scroll,
change "g.drawImage(image,0,count,Graphics.TOP|Graphics.LEFT);" to g.drawImage(image,count,0,Graphics.TOP|Graphics.LEFT);

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class TestScroll extends MIDlet
{
	TestCanvas tc = new TestCanvas();
	public void startApp()
	{
		Display.getDisplay(this).setCurrent(tc);
	}
	public void pauseApp(){}

	public void destroyApp(boolean bl){}
}

class TestCanvas extends Canvas implements Runnable
{
	Thread thread;
	Image image;
	int count;
	int imageSplitHeight=10;

	public TestCanvas()
	{
		try
		{
			image = Image.createImage("/testImg.png");
		}catch(Exception e){System.out.println("image not found");}
		thread = new Thread(this);
		thread.start();
	}

	public void run()
	{
		while(true)
		{
			try
			{
				count++;
				Thread.sleep(100);
				repaint();
			}catch(Exception e)
			{
			}
		}
	}
public void paint(Graphics g)
	{
		g.setColor(200,200,200);
		g.fillRect(0,0,getWidth(),getHeight());
		g.drawImage(image,0,count,Graphics.TOP|Graphics.LEFT);
	}
}

Hope this helps!

Regards
Gopal

Ps: Tested in WTK2.3 Default Emulator.