Java Swing自定义文本JEditorPane

Question

I have a list of Objects (the model) that are constantly appended to (similar to a log file) and I'd like to display as rich text in a JEditorPane (the view). How can I glue them together?

http://java.sun.com/docs/books/tutorial/uiswing/components/generaltext.html#document doesn't seem to give enough information to use.

Answer 1

一个简单的解决方案是将模型中的每个对象转换为HTML并附加字符串以创建可在JEditorPane上设置的HTML文档。

Answer 2

You can use DefaultStyledDocument together with AttributeSet :

SimpleAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setBold(attr , true);
StyleConstants.setForeground(attr, Color.RED); 
document.insertString(document.getLenght(),"yourstring", attr))

Answer 3

Building a custom Abstract Document is painful. You're better off with an intermediary model that listens to changes in both your Object Model and the document (with a DocumentListener ) and updates either the model or view, depending. This works pretty well if you're working in user time (as opposed to updating the Object model 1,000 times per second).

Answer 4

OK, so the simplest approach was to extend JTextPane. The extended class created and managed the underlying list. On format change (eg new colours) the list completely reformats the data. The only real problem was that the auto-scrolling is not 100% reliable, Both:

Container parent = getParent();

// get the parent until scroll pane is found
while (parent != null && !(parent instanceof JScrollPane)) {
    parent = parent.getParent();
}

if (parent != null) {
    JScrollPane scrollPane = (JScrollPane)parent;
    scrollPane.getVerticalScrollBar().setValue(scrollPane.getVerticalScrollBar().getMaximum());
}

and

scrollRectToVisible(new Rectangle(0, getHeight() - 2, 1, 1));

Provide inconsistent results with the text pane sometimes not scrolling all the way.