JDialog

[Randall Twede]

this should be fairly simple but i am having difficulty. here is some code.

		else if(e.getSource() == strokeMenuItem)
		{
			JOptionPane choice = new JOptionPane();
			String answer = choice.showInputDialog("Choose a width. The defaut is 1", "1");
			if(answer != null)	//user didn't cancel
			{
				int stroke = Integer.parseInt(answer);
				canvas.setStroke(stroke);
			}			
		}
		else if(e.getSource() == fadeMenuItem)
		{
		}

i want the fadeMenuItem to display a dialog very much like the strokeMenuItem does only with a slider instead of a textfield. i looked at the tutorial for custom dialog but it only confuses me. what exactly do i have to do? it seems i have to declare a JDialog and then add a JOptionPane to it?

i also face another problem. when the slider moves i want either the main image to change, or i want a small preview image in the dialog.

any help appreciated

[Randall Twede]

i found a simpler example of extending JDialog. even better, i found this:

If you don't need much in the way of custom behavior, JOptionPane is a good time saver. It takes care of the placement and localization of OK / Cancel options, and is a quick-and-dirty way to show a custom dialog without needing to define your own classes. Most of the time the "message" parameter in JOptionPane is a String, but you can pass in a JComponent or array of JComponents as well.