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11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
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25 
26 package sun.tools.jconsole;
27 
28 import java.awt.*;
29 import java.util.ArrayList;
30 
31 import javax.swing.*;
32 import javax.swing.border.*;
33 
34 
35 @SuppressWarnings("serial")
36 class OverviewTab extends Tab {
37     JPanel gridPanel;
38     TimeComboBox timeComboBox;
39 
getTabName()40     public static String getTabName() {
41         return Messages.OVERVIEW;
42     }
43 
OverviewTab(VMPanel vmPanel)44     public OverviewTab(VMPanel vmPanel) {
45         super(vmPanel, getTabName());
46 
47         setBorder(new EmptyBorder(4, 4, 3, 4));
48         setLayout(new BorderLayout());
49 
50         JPanel topPanel     = new JPanel(new BorderLayout());
51         add(topPanel, BorderLayout.NORTH);
52 
53         JPanel controlPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 5));
54         topPanel.add(controlPanel, BorderLayout.CENTER);
55 
56         timeComboBox = new TimeComboBox();
57         LabeledComponent lc = new LabeledComponent(Messages.TIME_RANGE_COLON,
58                                                    Resources.getMnemonicInt(Messages.TIME_RANGE_COLON),
59                                                    timeComboBox);
60         controlPanel.add(lc);
61 
62         gridPanel = new JPanel(new AutoGridLayout(10, 6));
63         gridPanel.setBorder(null);
64         JScrollPane sp = new JScrollPane(gridPanel);
65         sp.setBorder(null);
66         sp.setViewportBorder(null);
67         add(sp, BorderLayout.CENTER);
68 
69         // Note that panels are added on first update
70     }
71 
72 
newSwingWorker()73     public SwingWorker<?, ?> newSwingWorker() {
74         return new SwingWorker<Object, Object>() {
75             public Object doInBackground() {
76                 return null;
77             }
78 
79             protected void done() {
80                 if (gridPanel.getComponentCount() == 0) {
81                     final ArrayList<Plotter> plotters = new ArrayList<Plotter>();
82                     for (Tab tab : vmPanel.getTabs()) {
83                         OverviewPanel[] ops = tab.getOverviewPanels();
84                         if (ops != null) {
85                             for (OverviewPanel op : ops) {
86                                 gridPanel.add(op);
87                                 Plotter plotter = op.getPlotter();
88                                 if (plotter != null) {
89                                     plotters.add(plotter);
90                                     timeComboBox.addPlotter(plotter);
91                                 }
92                             }
93                         }
94                     }
95                     if (plotters.size() > 0) {
96                         workerAdd(new Runnable() {
97                             public void run() {
98                                 ProxyClient proxyClient = vmPanel.getProxyClient();
99                                 for (Plotter plotter : plotters) {
100                                     proxyClient.addWeakPropertyChangeListener(plotter);
101                                 }
102                             }
103                         });
104                     }
105                     if (getParent() instanceof JTabbedPane) {
106                         Utilities.updateTransparency((JTabbedPane)getParent());
107                     }
108                 }
109             }
110         };
111     }
112 
113 
114 
115     private class AutoGridLayout extends GridLayout {
116         public AutoGridLayout(int hGap, int vGap) {
117             super(0, 1, hGap, vGap);
118         }
119 
120         public Dimension preferredLayoutSize(Container parent) {
121             return minimumLayoutSize(parent);
122         }
123 
124         public Dimension minimumLayoutSize(Container parent) {
125             updateColumns(parent);
126             return super.minimumLayoutSize(parent);
127         }
128 
129         private void updateColumns(Container parent) {
130             // Use the outer panel width, not the scrolling gridPanel
131             int parentWidth = OverviewTab.this.getWidth();
132 
133             int columnWidth = 1;
134 
135             for (Component c : parent.getComponents()) {
136                 columnWidth = Math.max(columnWidth, c.getPreferredSize().width);
137             }
138 
139             int n = parent.getComponentCount();
140             int maxCols = Math.min(n, parentWidth / columnWidth);
141 
142             for (int columns = maxCols; columns >= 1; columns--) {
143                 if (columns == 1) {
144                     setColumns(maxCols);
145                 } else if ((n % columns) == 0) {
146                     setColumns(columns);
147                     break;
148                 }
149             }
150         }
151     }
152 }
153