Getting my scrollPane to scroll under programatic control

Question

I have a Groovy app which uses a scrollPane built via swing builder:

BinsicWindow(def controller)
{
    controlObject = controller
    swinger = new SwingBuilder()
    mainFrame = swinger.frame(
        title: "Binsic is not Sinclair Instruction Code",
        size:[640, 480],
        show:true,
        defaultCloseOperation: WindowConstants.DISPOSE_ON_CLOSE){
        scrollPane(autoscrolls:true) {
            screenZX = textArea(rows:24, columns:32) {visble:true}
        }
        screenZX.setFont(new Font("Monospaced", Font.PLAIN, 18))
    }
}

I add text to the textArea programatically (i.e. no user input) and I would like the textArea to scroll down automatically as content is added. But the view remains fixed at the top and I can only see the bottom (once the screen is more than full) by dragging the mouse.

Can I fix this? I have been searching for an answer to this for a wee while now and getting nowhere. Apologies if it's a simple answer.

score 2 · Accepted Answer · answered Jun 06 '12 at 20:35

2

The following lines should scroll your textarea to the last text position:

rect = screenZX.modelToView(screenZX.getDocument().getLength() - 1);
screenZX.scrollRectToVisible(rect);

answered Jun 06 '12 at 20:35

Hakan Serce

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OK, I could call that every time I add text, but is there a way to set the scrollPane to do this automatically? – adrianmcmenamin Jun 06 '12 at 20:49
You can put this code to a `DocumentListener`. This would make scrolling automatically whenever text is changed. But if you ask whether there is a method like "setAutoScrollToLastLine(true)", there is no such thing as far as I know. – Hakan Serce Jun 06 '12 at 20:55

Getting my scrollPane to scroll under programatic control

1 Answers1