JTKTextArea Demo - Instructions
Overview
The class JTKTextArea is a great tool for
building thread-safe gui's. JTKTextArea is a JThreadKit Swing component that adds some great additional features to a
JTextArea. The main feature highlighted in the demo is the ability to safely set or append text (from a helper
Thread) without the need to create a Runnable Object and call SwingUtilities.invokeLater().
You simply create a JTKTextArea Object by passing a JTextArea to the constructor:
JTKTextArea textArea = new JTKTextArea(new JTextArea());
Now any Thread can call the setTextSafely() or appendSafely() methods. Note: JTKTextArea
is not a subclass of Component. To add the wrapped JTextArea to a Container, simply do
the following:
container.add(textArea.getTextArea());
Running the Demo
Once the demo appears, click the "Start" button. The JTKTextArea's text will now start changing approximately every second.
The demo randomly calls setTextSafely() or appendSafely(). Notice the text area is cleared on a call to
setTextSafely(), or the random text is appended when appendSafely() is called. A key feature to point out
is the text area scrolling as text is appended beyond the visible area of the JScrollPane. This will not happen
if you call a JTextArea's setText() or append() methods directly from a helper
Thread. The JTKTextArea takes care of this issue.
You can stop and restart the demo if you wish, or simply close the window to end it.
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