CODEWITHSUNDEEP
javaswingjlabeljtextpanedom
Dmitriy
Dmitriy

Reputation: 161

get a JLabel from JTextPane and change its text

I add text with JLabel to the JTextPane, then I need to change the text in all JLabel's in the JTextPane. How can I do it?

...
JTextPane pane = new JTextPane();
HTMLEditorKit kit = new CompEditorKit();
HTMLDocument doc = new HTMLDocument();
pane.setEditable(false);
pane.setContentType("text/html");
pane.setEditorKit(kit);
pane.setDocument(doc);
...
kit.insertHTML(doc, doc.getLength(), "Test<object align=\"left\" classid=\"javax.swing.JLabel\"><param name=\"text\" value=\"22\"></object>Test", 0, 0, null);
EditLabels(doc);
...
public void EditLabels(Document doc) {
    if (doc instanceof HTMLDocument) {
        Element elem = doc.getDefaultRootElement();
        ElementIterator iterator = new ElementIterator(elem);
        while ((elem = iterator.next()) != null) {
            AttributeSet attrs = elem.getAttributes();
            Object elementName = attrs.getAttribute(AbstractDocument.ElementNameAttribute);
            Object o = (elementName != null) ? null : attrs.getAttribute(StyleConstants.NameAttribute);
            if (o instanceof HTML.Tag) {
                if ((HTML.Tag) o == HTML.Tag.OBJECT) {
                    View view = new CompView(elem);
                    //View view = (View)super.create(elem); //ERROR
                    //if (view instanceof JLabel)
                    //{
                    //  ((JLabel) view).setText("NM");
                    //  JLabel label = (JLabel)view;
                    //}
                }
            }
        }
    }
}

E.G.

View view = new CompView(elem);
((JLabel) view).setText("NM");
error: inconvertible types
  required: JLabel
  found:    View

View view = (View)super.create(elem);
error: cannot find symbol
  symbol: method create(Element)

Upvotes: 1

Views: 778

Answers (1)

Mikle Garin
Mikle Garin

Reputation: 10143

Well, you are mixing two totally different things - JLabel is a separate Swing component that contains text and icon and could be displayed inside any container. And JTextPane is a text editor and its document does NOT contain any separate JLabels, that is why you get "inconvertible types" exception while trying to cast View to JLabel.

View is just a base for various elements created from parsing (in your case) HTML into a structured elements tree.

It might be helpful to read some docs about JTextPane and other similar components: http://docs.oracle.com/javase/tutorial/uiswing/components/editorpane.html

Upvotes: 1

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