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Re: Animations with jTextPane

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I suggested this because I have some code that I just wrote that uses an 
HTML document to display some information on a JTextPane.  The data 
changes periodically and I just use the setText() method in this case to 
change what is displayed.  I'm not getting any weird effects and I don't 
have to call repaint().  I'm not displaying any images but I don't know 
what would be different about that.  I'll try some experiments later 
today and report back here.

knute...

On 5/10/2015 08:08, H.L@operamail.com wrote:
>
> Thank you for helping me with this. We have not tried this, but
> please note that we are continouusly changing what image is shown.
> The web cam captures a new image and this is shown on the screen, how
> could we do this updating with setDocument()?
>
>
> Den søndag den 10. maj 2015 kl. 16.49.42 UTC+2 skrev Knute Johnson:
>> 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
>


-- 

Knute Johnson

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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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