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Join Date: Jul 2007

Posts: 31

Reputation: claudiu_is is an unknown quantity at this point

Solved Threads: 1

claudiu_is claudiu_is is offline

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Light Poster

counter on a button

Oct 2nd, 2007

I have a Dialog window with a Button ko and a JLabel l. The button`s label refreshes at 1000ms from 5 to 1. There are 2 problems: the JLabel l it`s not displayed before the counter starts, it`s displayed after that, and the button doesn`t work during the countdown, if i push it during the countdown the window closes(thats the function if the ko button) but only after the countdown finishes. This is the piece of code:

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
public AskWindow(Frame parinte, boolean modala){
		super(parinte, modala);
		JLabel l;
		int t = 5;
		this.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				MyMain.raspuns = null;
				dispose();
				}
		});
		Panel panel = new Panel();
		ko = new Button("OK");
		l = new JLabel();
		l.setText("ati castigat de "+ nrJocT + " ori");
		panel.add(l);
		panel.add(ko);
		add(panel, BorderLayout.SOUTH);
		setLocationRelativeTo(parinte);
		pack();
		ko.addActionListener(this);
		setVisible(true);
		for (int i=0; i < t; i++)
		{
			ko.setLabel("" + (t-i));
			try{
				Thread.sleep(1000);
			}
			catch(InterruptedException o){}
		}
	}
public AskWindow(Frame parinte, boolean modala){
		super(parinte, modala);
		JLabel l;
		int t = 5;
		this.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				MyMain.raspuns = null;
				dispose();
				}
		});
		Panel panel = new Panel();
		ko = new Button("OK");
		l = new JLabel();
		l.setText("ati castigat de "+ nrJocT + " ori");
		panel.add(l);
		panel.add(ko);
		add(panel, BorderLayout.SOUTH);
		setLocationRelativeTo(parinte);
		pack();
		ko.addActionListener(this);
		setVisible(true);
		for (int i=0; i < t; i++)
		{
			ko.setLabel("" + (t-i));
			try{
				Thread.sleep(1000);
			}
			catch(InterruptedException o){}
		}
	}

•

Join Date: May 2007

Posts: 4,483

Reputation: Ezzaral has much to be proud of

Solved Threads: 515

Ezzaral

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Industrious Poster

Re: counter on a button

Oct 2nd, 2007

You need to set up a Swing Timer to handle the countdown on the button. See the following on timers:How to Use Timers.

The behavior you are getting right now is because you are sleeping in the thread that is creating the UI. Create the UI first and after it is set visible, start the Timer task that updates the label on the button (and it's behavior if needed).

•

Join Date: May 2007

Posts: 4,483

Reputation: Ezzaral has much to be proud of

Solved Threads: 515

Ezzaral

Offline

Industrious Poster

Re: counter on a button

Oct 2nd, 2007

You could use the following for the countdown

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
    class ButtonCountdown implements ActionListener {
        int count=0;
        JButton button = null;
 
        public ButtonCountdown(final JButton button, int count){
            this.count = count;
            this.button = button;
        }
        public void actionPerformed(ActionEvent e) {
            if (count>0){
                button.setText(String.valueOf(--count));
            } else {
                button.setText("Done!");
            }
        }
    }
    class ButtonCountdown implements ActionListener {
        int count=0;
        JButton button = null;
        
        public ButtonCountdown(final JButton button, int count){
            this.count = count;
            this.button = button;
        }
        public void actionPerformed(ActionEvent e) {
            if (count>0){
                button.setText(String.valueOf(--count));
            } else {
                button.setText("Done!");
            }
        }
    }

and then start it like so after you have the UI all set up

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
Timer koTimer = new Timer(1000, new ButtonCountdown(ko, 5));
koTimer.start();
Timer koTimer = new Timer(1000, new ButtonCountdown(ko, 5));
koTimer.start();