Simple swing timer in groovy

swingTimer.groovy

import javax.swing.JDialog
import javax.swing.JPanel
import java.awt.*
import java.awt.image.BufferedImage

import static java.lang.System.exit
import static javax.swing.JOptionPane.*

class TimerPanel extends JPanel {

    int progress = 0

    TimerPanel() {
        setDoubleBuffered(true)
    }

    void setProgress(int p) {
        this.progress = p
        this.repaint()
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g)
        def insets = getInsets()
        g.setColor(Color.GREEN)
        int progressWith = width * progress / 100
        g.fillRect(insets.left, insets.top, progressWith, height - insets.bottom)
        g.setColor(Color.BLACK)
        g.drawRect(insets.left, insets.top, width - insets.right - 1, height - insets.bottom - 1)
        g.setFont(new Font("TimesRoman", Font.PLAIN, 15));
        g.drawString("Progress : " + progress + "%", 5, height / 2 + 5)
    }
}


class TimerDialogBuilder {
    private final String title
    private final int width
    private final int height
    private final TimerPanel panel

    TimerDialogBuilder(String title, int width, int height, TimerPanel panel) {
        this.panel = panel
        this.height = height
        this.width = width
        this.title = title
    }

    JDialog jDialog() {
        JDialog jDialog = new JDialog()
        jDialog.setTitle(title)
        jDialog.setSize(width, height)
        jDialog.setResizable(false)
        jDialog.setIconImage(new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB_PRE));
        centerDialog(jDialog)
        jDialog.add(panel)
        jDialog
    }

    private void centerDialog(JDialog dialog) {
        Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
        int x = (int) ((dimension.getWidth() - dialog.getWidth()) / 2);
        int y = (int) ((dimension.getHeight() - dialog.getHeight()) / 2);
        dialog.setLocation(x, y);
    }

}

class CenteredFrame extends JDialog {

    CenteredFrame(String title, int width, int height) {
        setTitle(title)
        setSize(width, height)
        setResizable(false)
        centerFrame()
        Image icon = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB_PRE);
        setIconImage(icon);
    }

    void centerFrame() {
        Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
        int x = (int) ((dimension.getWidth() - getWidth()) / 2);
        int y = (int) ((dimension.getHeight() - getHeight()) / 2);
        setLocation(x, y);
    }

}

def startRepeatableTimer(String taskName, int durationInSeconds) {
    def f = new TimerPanel()
    def frame = new TimerDialogBuilder(taskName, 200, 60, f).jDialog()
    frame.setVisible(true)

    new Timer().runAfter(durationInSeconds * 1000) {
        if (OK_OPTION == showConfirmDialog(null, "Task '$taskName' done.\nStart again ?", taskName, YES_NO_OPTION)) {
            frame.dispose()
            startRepeatableTimer(taskName, durationInSeconds)
        } else {
            exit(0)
        }
    }

    Thread.start {
        (1..durationInSeconds * 100).each {
            int progress = it / durationInSeconds
            f.setProgress(progress)
            sleep(10)
        }
    }

}


if(args && args.length ==2) {
    def durationInSeconds = args[1].toInteger()
    def taskName = args[0]
    startRepeatableTimer(taskName, durationInSeconds)
} else {
    println("""Please enter task name and duration in sec for the timer""")
}