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Implement text style on the fly in JEditorPane

I have an idea to write a note taking application in Java that does some simple text replacement as you type; probably a small subset of Markdown syntax. For example, if you entered a line that was #sometext, it would have turned out:

SOMETEXT

Wikidpad is part of what I'm trying to do (I'm not just re-implementing this, just part of the syntax / display functionality).

So, in essence, I’m looking for a way to write some component that, when the user hits “return”, he will look at the entered line and do any magic necessary for the html tags to display correctly.

I hit my head against Document Documents and DocumentFilters, as well as DocumentListeners and HTMLReaders, and without too much luck, can anyone put me on the right track?

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5 answers

What you need is a set of java text editors . This tutorial was great and helped me implement a wiki editor that looks like your problem. The Swing Editor Kit (believe it or not) is specifically designed to solve your problem. I wrote a dynamic wiki as a reference system using this technique, although not without a great deal of struggle. Here is what I had to do:

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JTextPane, . KeyPressed:

jTextPane1.addKeyListener(new java.awt.event.KeyAdapter() {
    public void keyPressed(java.awt.event.KeyEvent evt) {
        jTextPane1KeyPressed(evt);
    }
});

private void jTextPane1KeyPressed(java.awt.event.KeyEvent evt) {
    // TODO add your handling code here:
    String txt = jTextPane1.getText();

}

Netbeans.

, - :

StyledDocument doc = jTextPane1.getStyledDocument();
Style style = jTextPane1.addStyle("Bold", null);
StyleConstants.setBold(style, true);

int pos, endpos;
// Find pos of word to be displayed in bold
...

// Set style
doc.setCharacterAttributes(pos, endpos, style, true);
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Use RSyntaxTextArea , it does what you need and you can add your own lexers / rules.

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