JScrollPane and viewport issues

[tbuchwalter]

Hi all,

I am trying to create a UI that uses GridLayout. As a part of this UI I've created a JTextArea and added it to a JScrollPane. I then add text to the text area through out the program using .append() However, the text area keeps expanding down out of a viewable area. I want the text to scroll upward as new text is added but I can not figure out for the life of me how to make this happen. I've tried several different setting i.e. (setMaximumSize() or setPrefferedSize() but neither seem to work.

Here is a sample of the code:
//set text area
jta_area = new JTextArea();
jta_area.setBackground(null);
jta_area.setFont((Font) Game.f);
jta_area.setColumns(15);
jta_area.setAutoscrolls(true);
jta_area.setEditable(false);

combatScroll = new JScrollPane(jta_area);
//combatScroll.getViewport().setScrollMode(0);
Dimension d = new Dimension(15,15);
combatScroll.setPreferredSize(d);
combatScroll.setMaximumSize(d);

Any help you give can give me is much appreciated

Thanks

[Fubarable]

What if wherever you are appending to the JTextArea, you add a line after this that sets the caret position to the end of the document:

jta_area.append("whatever you're adding\n");

// *** add code below ***
jta_area.setCaretPosition(jta_area.getText().length()); // to place the caret at end of doc

[DarrylBurke]

Check out camickr's Text Area Scrolling « Java Tips Weblog

dd