11 replies to this topic

[Nicholas Adri Chandoke]

Does anyone know how I can use the JScrollPane that I have to let me scroll horizontally in the contained JTable?
And, yes, it already scrolls vertically.
And, yes, it also is only with JTable(s).

Also, how do I get the JTable to delete data by pressing the "delete" key (KeyEvent.VK_DELETE)?

[Nicholas Adri Chandoke]

Nevermind. I just had to change the JTable.AUTO_RESIZE_ALL_COLUMNS to JTable.AUTO_RESIZE_OFF (I was subclassing JTable).

However, the second question of deleting cells still holds...

[Kraicheck]

Implement KeyListener, listen for KeyEvents and react on them.

[Nicholas Adri Chandoke]

addKeyListener(keyOps);
...

private KeyListener keyOps = new KeyListener() {

		public void keyTyped(KeyEvent e) {
			//do nothing
		}

		public void keyPressed(KeyEvent e) {
			if (e.getKeyCode() == KeyEvent.VK_CLEAR)
				setValueAt(null, getX(), getY());
		}

		public void keyReleased(KeyEvent e) {
			//do nothing
		}
		
	};

The only problem is that the JTable's behavior (when a key is pressed) is to either edit the cell or insert the specified character into a cell. I think that I need to change that behavior. Or maybe I didn't implement the KeyListener correctly?

[Kraicheck]

Hmm, try to consume the event.
That would prevent the JTable from acting on it after your own eventhandling.

[Nicholas Adri Chandoke]

Might I ask, but what the hell does it mean to "consume an event"?!
Do you mean to override it? if so, how do I override an event?
if not, what's it mean and by "acting on it" do you mean the pressing of the [delete] button?

Sorry if I sound freaked. Also, I did write the KeyListener correctly, right? (I don't do KeyListeners often)

[Captain Pierce]

Look at the API docs, should be pretty clear what Krai's talking about ;)

[Nicholas Adri Chandoke]

Um. I looked in the Java API (most throughly in the javax.swing.table package) but I couldn't find any interface, abstract class, or class that could have me get the desired results. Also, I couldn't find anything containing the word "consume"... Am I looking in the wrong place?

I've never written a KeyListener before; am I making a mistake in my code 4 entries ago?

[Captain Pierce]

http://java.sun.com/javase/6/docs/api/java...t/KeyEvent.html

Look for the consume method in the inherited methods section.

[Kraicheck]

Your keylistener looks correct.
Here's a direct link to the consume method: AWTEvent.consume()

[Nicholas Adri Chandoke]

Thanks very much. I will try out this method when I get the time to.

[Nicholas Adri Chandoke]

Alright! I just got to trying it out, and it works perfectly! thank you very much.