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Thread: Stopping Graphics Animation.

  1. #1
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    Default Stopping Graphics Animation.

    protected void retrace(boolean check)
    	{
    		while (status == true)
    		{
    			for (counter = LOOPBACK; counter <= frameCW4.getWidth(); counter++ )
    			{
    				for (counter = LOOPBACK; counter <= frameCW4.getHeight(); counter++)
    				{
    						{
    							// System.out.println(counter);
    							// xCoord = generator.nextInt(frameCW4.getWidth());
    							// yCoord = generator.nextInt(frameCW4.getHeight());
     
    							xCoord++;
    							yCoord++;
     
    							try 
    							{
    								Thread.sleep(5);
    								firstDrawPanel.repaint();
    								secondDrawPanel.repaint();
    							}
    							catch (InterruptedException e)
    							{
    								e.printStackTrace();
    							}	
    						}
    				}
    			}
     
    			for ( counter = frameCW4.getWidth(); counter >= LOOPBACK; counter--)
    			{
    				for (counter = frameCW4.getHeight(); counter >= LOOPBACK; counter --)
    				{
    					xCoord--;
    					yCoord--;
     
    					try 
    					{
    						Thread.sleep(5);
    						firstDrawPanel.repaint();
    						secondDrawPanel.repaint();
    					}
    					catch (InterruptedException e)
    					{
    						e.printStackTrace();
    					}
    				}
    			}
    		}
    	}

    This code makes the graphics object move through the JFrame, how do I do it such that, when a button is clicked, the graphics objects stop moving.
    Last edited by SyntheticD; February 23rd, 2011 at 07:02 PM.


  2. #2
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    Default Re: Stopping Graphics Animation.

    What Thread is this one. I'm hoping it's not the EDT, as it's pretty horrible to sleep on the EDT. But if it's not, then you're modifying variables you presumably use on the EDT, which might get tricky.

    But the basic answer is- why don't you just have a boolean that indicates that the objects should be moving, check that in your above loop, and set it to false when you click the button? When it's false, exit the loop.
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  3. #3
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    Default Re: Stopping Graphics Animation.

    I tried that, but when the button is clicked to stop the animation, program "freezes"

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    Default Re: Stopping Graphics Animation.

    If you want help, you'll have to provide an SSCCE that demonstrates the problem. Otherwise we're just guessing at what you're doing.
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