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1 package com.opensymphony.workflow.designer.swing.status;
2
3 import java.awt.*;
4 import java.awt.event.*;
5 import javax.swing.*;
6 import javax.swing.border.EmptyBorder  ;
7
8 import com.opensymphony.workflow.designer.ResourceManager;
9 import com.opensymphony.workflow.designer.swing.plaf.BlueButtonUI;
10
11
16 public class MemoryDisplay extends DisplayItem
17 {
18 private static final Color edgeColor = new Color(82, 115, 214);
19 private static final Color centerColor = new Color(180, 200, 230);
20 private final Icon gcIcon = ResourceManager.getIcon("gc");
21 private MemoryPanel panel;
22 private JButton invokeGC;
23 private int updateInterval = 2000;
24 private Timer timer;
25
26 class MemoryPanel extends JPanel
27 {
28 public void paint(Graphics g)
29 {
30 super.paint(g);
31 Dimension dimension = getSize();
32 Insets insets = getInsets();
33 int left = insets.left;
34 int top = insets.top;
35 Runtime runtime = Runtime.getRuntime();
36 long freeMemory = runtime.freeMemory();
37 long totalMemory = runtime.totalMemory();
38 int insideWidth = dimension.width - (insets.left + insets.right);
39 int usedAmount = insideWidth - (int)(((long)insideWidth * freeMemory) / totalMemory);
40 int insideHeight = dimension.height - (insets.bottom + insets.top);
41 Graphics2D g2 = (Graphics2D)g;
42 g2.setPaint(new GradientPaint(left, top, edgeColor, left, insideHeight / 2, centerColor, true));
43 g.fillRect(left, top, usedAmount, insideHeight);
44 g.setColor(getBackground());
45 g.fillRect(left + usedAmount, top, insideWidth - usedAmount, insideHeight);
46 g.setFont(getFont());
47 g.setColor(Color.black);
48 String memory = (Long.toString((totalMemory - freeMemory) / 1048576L) + "M of " + Long.toString(totalMemory / 1048576L) + 'M');
49 FontMetrics fontmetrics = g.getFontMetrics();
50 int stringWidth = fontmetrics.charsWidth(memory.toCharArray(), 0, memory.length());
51 int stringHeight = fontmetrics.getHeight() - fontmetrics.getDescent();
52 g.drawString(memory, left + (insideWidth - stringWidth) / 2, top + (insideHeight + stringHeight) / 2);
53 }
54 }
55
56 public MemoryDisplay()
57 {
58 super();
59 setLayout(new BorderLayout(5, 0));
60 panel = new MemoryPanel();
61 panel.setOpaque(false);
62 invokeGC = new JButton(gcIcon);
63 invokeGC.setRequestFocusEnabled(false);
64 invokeGC.setFocusable(false);
65 setBorder(new EmptyBorder (1, 1, 1, 1));
66 invokeGC.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3));
67 invokeGC.setOpaque(false);
68 invokeGC.setUI(new BlueButtonUI());
69 invokeGC.addActionListener(new ActionListener()
70 {
71 public void actionPerformed(ActionEvent e)
72 {
73 System.gc();
74 MemoryDisplay.this.panel.repaint();
75 }
76 });
77 add(panel, BorderLayout.CENTER);
78 add(invokeGC, BorderLayout.WEST);
79 timer = new Timer(updateInterval, new ActionListener()
80 {
81 public void actionPerformed(ActionEvent actionevent)
82 {
83 MemoryDisplay.this.panel.repaint();
84 }
85 });
86 timer.start();
87 }
88
89 public int getPreferredWidth()
90 {
91 return 30 + getFontMetrics(getFont()).stringWidth("0000M of 0000M");
92 }
93
94 public String getItemName()
95 {
96 return "Memory";
97 }
98
99 public void setUpdateInterval(int i)
100 {
101 timer.stop();
102 updateInterval = i;
103 timer.setDelay(i);
104 timer.start();
105 }
106
107 public int getUpdateInterval()
108 {
109 return updateInterval;
110 }
111
112 public void removeNotify()
113 {
114 super.removeNotify();
115 stop();
116 timer = null;
117 }
118
119 public void stop()
120 {
121 timer.stop();
122 }
123
124 }
125 |
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