Re: Display problem in JEditorPane
hiwa <H...@nifty.ne.jp> writes:
On Jun 24, 5:33 am, Michael Jung <m...@phantasia.org> wrote:
I have a JEditorPane that contains an HTMLDocument, which contains some
referenced images, i.e. <img>-tags. Now, I'd like to display this in
Graphics context that is not the GUI (where everything works fine).
The problem is that immediately after I load the document, the images seem
not to be available for drawing. This fits with the fact that the GUI
elements on screen get redrawn as images get loaded successively.
However, I cannot find a proper event to listen to, that tells me that the
JEditorPane is finished drawing. I also can't find anything at the
HTMLDocument, but I presume that would be the wrong object anyway.
Additionally there may be a problem that simple drawing of the JEditorPane
without actually "showing" it, might not convince that component to draw
the images at all. I have experimented a little with the
SwingUtilities.paintComponent to circumvent this but it apparently didn't
help.
public class HTMLEditorKit2 extends HTMLEditorKit{
public Document createDefaultDocument(){
HTMLDocument doc = (HTMLDocument)(super.createDefaultDocument());
doc.setAsynchronousLoadPriority(-1); //do synchronous load
return doc;
}
}
------------------------------------------
JEditorPane.registerEditorKitForContentType("text/html",
"HTMLEditorKit2");
JEditorPane jep = new JEditorPane();
jep.setEditorKitForContentType("text/html", new HTMLEditorKit2());
Doesn't help. It speeds up the drawing, but it's not fast enough (apparently).
I'm not sure this should really do the trick, because the GUI loading also
still shows some lag.
That also makes sense, since displaying an HTML document depends on the
size/layout of the JEditorPane itself, which can vary during time, while the
loading of the document happens only once.
[Technically, I'm not using any difficult layout in the document, but the
possibility should show that the HTML layout is a seperate process from the
document loading, which is now synchronous.]
I hope there is something about the JEditorPane that tells me when the doc is
fully layed out, since the GUI Layout manager somehow knows (I hope).
Michael