|
1 package org.oddjob.monitor.view;
2
3
6
7 import java.awt.BorderLayout  ;
8 import java.awt.Color ;
9 import java.awt.event.ActionEvent ;
10 import java.awt.event.ActionListener ;
11 import java.util.Enumeration ;
12 import java.util.Hashtable ;
13 import java.util.Observable ;
14 import java.util.Observer ;
15 import java.util.StringTokenizer ;
16
17 import javax.swing.JCheckBox ;
18 import javax.swing.JPanel ;
19 import javax.swing.JScrollPane ;
20 import javax.swing.JTextPane ;
21 import javax.swing.text.BadLocationException ;
22 import javax.swing.text.MutableAttributeSet ;
23 import javax.swing.text.SimpleAttributeSet ;
24 import javax.swing.text.StyleConstants ;
25 import javax.swing.text.StyledDocument ;
26
27 import org.oddjob.logging.LogLevel;
28 import org.oddjob.monitor.model.LogAction;
29 import org.oddjob.monitor.model.LogEventProcessor;
30
31 public class LogTextPanel extends JPanel
32 implements Observer , LogEventProcessor {
33
34 private static final int MAX_DOC_LENGTH = 100000;
35
36 private JTextPane textPane;
37 private JCheckBox cbxTail;
38 private StyledDocument doc;
39 private Hashtable fontAttributes;
40
41 private long sequence = 0;
42
43 public LogTextPanel(Observable model) {
44 model.addObserver(this);
45
46 constructComponents();
47 createDefaultFontAttributes();
48 }
49
50 private void constructComponents() {
51 this.setLayout(new BorderLayout ());
53
54 cbxTail = new JCheckBox ();
55 cbxTail.setSelected(true);
56 cbxTail.setText("Tail log events");
57 cbxTail.addActionListener(new ActionListener () {
58 public void actionPerformed(ActionEvent e) {
59 if (cbxTail.isSelected()) {
60 textPane.setCaretPosition(doc.getLength());
61 }
62 }
63 });
64
65 JPanel bottomPanel = new JPanel ();
66 bottomPanel.add(cbxTail, null);
67
68 textPane = new JTextPane ();
69 textPane.setEditable(false);
70 textPane.setText("");
71 doc = textPane.getStyledDocument();
72 JScrollPane scroll = new JScrollPane ();
73 scroll.setViewportView(textPane);
74
75 this.add(bottomPanel, BorderLayout.SOUTH);
76 this.add(scroll, BorderLayout.CENTER);
77 }
78
79 public void setTextBackground(Color color) {
80 textPane.setBackground(color);
81 }
82
83 public void setTextBackground(String v) {
84 textPane.setBackground(parseColor(v));
85 }
86
87 private void createDefaultFontAttributes() {
88 LogLevel[] prio = new LogLevel[] { LogLevel.FATAL, LogLevel.ERROR,
89 LogLevel.WARN, LogLevel.INFO, LogLevel.DEBUG };
90
91 fontAttributes = new Hashtable ();
92 for (int i = 0; i < prio.length; i++) {
93 MutableAttributeSet att = new SimpleAttributeSet ();
94 fontAttributes.put(prio[i], att);
95 }
97
98 setTextColor(LogLevel.FATAL, Color.red);
99 setTextColor(LogLevel.ERROR, Color.magenta);
100 setTextColor(LogLevel.WARN, Color.orange);
101 setTextColor(LogLevel.INFO, Color.blue);
102 setTextColor(LogLevel.DEBUG, Color.black);
103 }
104
105 private Color parseColor(String v) {
106 StringTokenizer st = new StringTokenizer (v, ",");
107 int val[] = { 255, 255, 255, 255 };
108 int i = 0;
109 while (st.hasMoreTokens()) {
110 val[i] = Integer.parseInt(st.nextToken());
111 i++;
112 }
113 return new Color (val[0], val[1], val[2], val[3]);
114 }
115
116 void setTextColor(LogLevel l, String v) {
117 StyleConstants.setForeground((MutableAttributeSet ) fontAttributes
118 .get(l), parseColor(v));
119 }
120
121 void setTextColor(LogLevel l, Color c) {
122 StyleConstants.setForeground((MutableAttributeSet ) fontAttributes
123 .get(l), c);
124 }
125
126 void setTextFontSize(int size) {
127 Enumeration e = fontAttributes.elements();
128 while (e.hasMoreElements()) {
129 StyleConstants.setFontSize((MutableAttributeSet ) e.nextElement(),
130 size);
131 }
132 return;
133 }
134
135 void setTextFontName(String name) {
136 Enumeration e = fontAttributes.elements();
137 while (e.hasMoreElements()) {
138 StyleConstants.setFontFamily((MutableAttributeSet ) e.nextElement(),
139 name);
140 }
141 return;
142 }
143
144 public void onClear() {
145 try {
146 doc.remove(0, doc.getLength());
147 } catch (BadLocationException e) {
148 e.printStackTrace();
149 }
150 }
151
152 public void onUnavailable() {
153 textPane.setText(("No log available."));
154 }
155
156 public void onEvent(final String text, final LogLevel level) {
157
158 try {
159 doc.insertString(doc.getLength(), text,
160 (MutableAttributeSet ) fontAttributes
161 .get(level));
162 int overflow = doc.getLength() - MAX_DOC_LENGTH;
163 if (overflow > 0) {
164 doc.remove(0, overflow);
165 if (!cbxTail.isSelected()) {
169 int position = textPane.getCaretPosition();
170 if (position - overflow < 0) {
171 position = 0;
172 }
173 textPane.setCaretPosition(position);
174 }
175 }
176 if (cbxTail.isSelected()) {
177 textPane.setCaretPosition(doc.getLength());
178 }
179 } catch (BadLocationException e) {
180 e.printStackTrace();
181 }
182 }
183
184
187 public void update(Observable o, Object arg) {
188 LogAction a = (LogAction) arg;
189 a.accept(this);
190 }
191 }
192 |
Popular Tags |
Java API By Example, From Geeks To Geeks.