MatrixStatusBar.java

package net.squiz.matrix.ui;

import javax.swing.*;
import java.awt.*;
import java.util.*;
import java.awt.event.*;
import net.squiz.matrix.core.*;
import javax.swing.border.*;


public class MatrixStatusBar {

    private static java.util.List elements = new ArrayList();
    private static MatrixStatusBarElement[] elementsArr;

    /* the text that was last set globally */
    private static String statusText = "";

    // cannot instantiate
    private MatrixStatusBar() {}

    public static MatrixStatusBarElement createStatusBar() {
        MatrixStatusBarElement element = new MatrixStatusBarElement(statusText);
        synchronized(elements) {
            elements.add(element);
        }
        return element;
    }

    private static MatrixStatusBarElement[] getElements() {
        synchronized(elements) {
            if (elementsArr == null) {
                elementsArr = (MatrixStatusBarElement[]) elements.toArray(
                    new MatrixStatusBarElement[elements.size()]);
            }
            return elementsArr;
        }
    }

    public static void setStatus(String status) {
        statusText = status;
        MatrixStatusBarElement[] elements = getElements();
        for (int i = 0; i < elements.length; i++)
            elements[i].setStatus(status);
    }

    public static void clearStatus() {
        setStatus("");
    }

    public static String getStatus() {
        return statusText;
    }

    public static void setStatusAndClear(String status, int time) {
        // dont call MatrixStatusBarElement.setStatusAndClear as it will
        // create an action listener and timer for all status bars and cause
        // undesirable results.
        ActionListener listener = new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                setStatus("");
            }
        };
        setStatus(status);
        javax.swing.Timer t = new javax.swing.Timer(time, listener);
        t.setRepeats(false);
        t.start();
    }

    private static class MatrixStatusBarElement extends JPanel
        implements MatrixConstants, MouseListener {

        private JLabel label;
        private Spinner spinner;
        private javax.swing.Timer clearTimer;

        // only MatrixStatusBar should be able to create individual elements
        private MatrixStatusBarElement(String status) {
            setLayout(new FlowLayout(FlowLayout.LEFT));

            spinner  = new Spinner();
            label    = new JLabel(statusText);

            label.setFont(PLAIN_FONT_10);

            add(spinner);
            add(label);

            setBackground(UIManager.getColor("StatusBar.background"));

            // create an action and a timer to clear the status
            // which will also stop the spinner
            ActionListener listener = new ActionListener() {
                public void actionPerformed(ActionEvent evt) {
                    setStatus("");
                }
            };
            clearTimer = new javax.swing.Timer(1000, listener);
            clearTimer.setRepeats(false);
            addMouseListener(this);
        }

        private void setStatus(String status) {
            if (status.equals("") && spinner.isStarted())
                spinner.stop();
            else if ((!status.equals("")) && !spinner.isStarted())
                spinner.start();
            label.setText(status);
        }

        private void clearStatus() {
            setStatus("");
        }

        private void setStatusAndClear(String status, int time) {
            setStatus(status);
            clearTimer.setDelay(time);
            clearTimer.start();
        }

        private String getStatus() {
            return label.getText();
        }

        public void mouseEntered(MouseEvent evt) {}
        public void mouseExited(MouseEvent evt) {}
        public void mousePressed(MouseEvent evt) {}
        public void mouseReleased(MouseEvent evt) {}

        public void mouseClicked(MouseEvent evt) {
            if (evt.getClickCount() != 2)
                return;
            /*Runtime rt = Runtime.getRuntime();
            long preFree = rt.freeMemory();
            rt.gc();
            long postFree = rt.freeMemory();
            long freed = (postFree - preFree) / 1000;
            GUIUtilities.error(freed + "Kb Released", "Memory Released");*/
            net.squiz.matrix.debug.Log.openLogs();
        }
    }
}