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Re: Animations with jTextPane

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From	Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: Animations with jTextPane
Date	Sun, 10 May 2015 07:49:37 -0700
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On 5/10/2015 02:57, H.L@operamail.com wrote:
>
>   Hey
>
>   We are using OpenCV to grab images from the web cam. The idea is to show the feed in a jTextPane when the user selects to show feed, otherwise other stuff can be shown in the pane. This pane is in a JFrame with  lots of other swing objects.
>
>   Basic functionality:
>
>   IplImage grabbedImage = opencv_highgui.cvQueryFrame(capture);
>    while  ((grabbedImage = opencv_highgui.cvQueryFrame(capture)) !=null)
>   	 jTextPane1.insertIcon(new ImageIcon(grabbedImage.getBufferedImage()));
>
>
> Now, we get problems because this shows multiple video frames. Obviously, it keeps inserting a new image, so they will be placed on top of each other.
>
>   We tried to clear the pane and then repaint by doing like this instead:
>
>    this.removeIcon();
>                 jTextPane1.repaint();
> 	 jTextPane1.insertIcon(new ImageIcon(grabbedImage.getBufferedImage()));
>
>   Where removeIcon looks as can be seen below:
>
>   But now, it gets flashy, the user can clearly see how the pane is cleared and then repainted, just a flashy slow change of images.
>
>   So is there any way to get around both of these issues?
>
>
>
>
>
>
>
>
>   private void removeIcon()
>    {
>      for (int i=0; i<jTextpane1.getStyledDocument().getLength(); i++)
>      {
>        Element element =
>                 jTextPane1.getStyledDocument().getCharacterElement(i);
>        AttributeSet attributeSet = element.getAttributes();
>        Icon icon = StyleConstants.getIcon(attributeSet);
>        if (icon != null)
>        {
>          try
>          {
>
>            jTextPane1.getStyledDocument().remove(i, 1);
>            jTextPane1pane.getStyledDocument().insertString(i, " ", new
>                SimpleAttributeSet());
>            icon = null;
>          }
>          catch (Exception exc)
>          {
>            System.out.println("Exception : " + exc.getMessage());
>          }
>        }
>      }
>    }
>
>
>

Have you tried just putting the image in a StyledDocument and using 
setDocument()?

-- 

Knute Johnson

Thread

Animations with jTextPane H.L@operamail.com - 2015-05-10 02:57 -0700
  Re: Animations with jTextPane Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-05-10 07:49 -0700
    Re: Animations with jTextPane H.L@operamail.com - 2015-05-10 08:08 -0700
      Re: Animations with jTextPane Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-05-10 08:54 -0700
      Re: Animations with jTextPane Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-05-10 10:28 -0700
        Re: Animations with jTextPane H.L@operamail.com - 2015-05-10 13:28 -0700
          Re: Animations with jTextPane Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2015-05-10 14:17 -0700

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