Re: Disabling generated buttons

From:

Cecil Westerhof <Cecil@decebal.nl>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 02 Feb 2015 15:16:44 +0100

Message-ID:

<87vbjkz9df.fsf@Equus.decebal.nl>

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