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From: Cecil Westerhof <Cecil@decebal.nl>
Newsgroups: comp.lang.java.programmer
Subject: Re: Disabling generated buttons
Organization: Decebal Computing
References: <874mr41ox9.fsf@Equus.decebal.nl>
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Date: Mon, 02 Feb 2015 15:16:44 +0100
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Op Monday 2 Feb 2015 13:24 CET schreef Cecil Westerhof:

> I defined the following class:
> private enum Colours {
> Blue(Color.BLUE),
> Red(Color.RED),
> Orange(Color.ORANGE),
> Yellow(Color.YELLOW),
> Green(Color.GREEN),
> Cyan(Color.CYAN),
> Magenta(Color.MAGENTA),
> Brown(new Color(0x9C, 0x5D, 0x52)),
> ;
>
> private final Color value;
>
> Colours(Color value) {
> this.value = value;
> }
>
> public Color value() {
> return value;
> }
> }
>
> I use it to add some (Swing) buttons:
> for(int i = 0; i < Colours.values().length; ++i) {
> final Colours   colour  = Colours.values()[i];
>
> JButton jButton = new JButton("" + colour);
>
> add(jButton, gbc);
> jButton.addActionListener(new ActionListener() {
> public void actionPerformed(ActionEvent e) {
> checkColour(colour);
> }
> });
> gbc.gridx++;
> if( gbc.gridx == 3 ) {
> gbc.gridy++;
> gbc.gridx = 0;
> }
> }
>
> Those buttons are used to select a colour. But when the wrong colour
> is selected I want to disable all the buttons for half a second.
> (Otherwise people could just click very fast at random.)
> How would I do this?

I hoped that there was a ‘smart’ way, but probably not. So I
implemented it in the ‘dumb’ way.

I created a variable to hold them all:
    private JButton     colourButtons[] = new JButton[Colours.values().length];

I changed the generating into:
        for(int i = 0; i < Colours.values().length; ++i) {
            final Colours   colour  = Colours.values()[i];

            JButton jButton = new JButton("" + colour);

            colourButtons[i] = jButton;
            add(jButton, gbc);
            jButton.addActionListener(new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                        checkColour(colour);
                    }
                });
            gbc.gridx++;
            if( gbc.gridx == 3 ) {
                gbc.gridy++;
                gbc.gridx = 0;
            }
        }

And in checkColour I put the following code:
            javax.swing.Timer timer = new javax.swing.Timer(500, new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                        setEnabledColourButtons(true);
                    }
                });

            setEnabledColourButtons(false);
            timer.setRepeats(false);
            timer.start();

This does what I want.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof