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1
25 package org.jrobin.mrtg.client;
26
27 import javax.swing.*;
28 import java.awt.*;
29 import java.awt.event.ActionEvent  ;
30 import java.awt.event.ActionListener ;
31 import java.awt.event.KeyEvent ;
32 import java.awt.event.WindowEvent ;
33 import java.io.*;
34
35 class HostDialog extends JDialog {
36 private static final String HOST_FILENAME = System.getProperty("user.home") +
37 System.getProperty("file.separator") + ".last-mrtg-host";
38 private static final String DEFAULT_HOST = "localhost";
39 private static final String TITLE = "Select JRobin-MRTG host";
40
41 private String host;
42
43 private JLabel hostLabel = Util.standardLabel("Host address:");
44 private JTextField hostField = Util.standardTextField();
45 private JButton okButton = Util.standardButton("OK");
46 private JButton cancelButton = Util.standardButton("Cancel");
47
48 HostDialog(Frame parent) {
49 super(parent, TITLE, true);
50 constructUserInterface();
51 pack();
52 setVisible(true);
53 }
54
55 private void constructUserInterface() {
56 JPanel content = (JPanel) getContentPane();
57 Box box = Box.createVerticalBox();
58 box.add(Util.getPanelFor(hostLabel, hostField));
59 box.add(Util.getPanelFor(Util.standardLabel(), okButton, cancelButton));
60 content.add(box);
61
62 String mrtgHost = MrtgData.getInstance().getMrtgHost();
63 if(mrtgHost != null) {
64 hostField.setText(mrtgHost);
65 }
66 else {
67 String savedHost = getHostFromFile();
68 hostField.setText(savedHost == null? DEFAULT_HOST: savedHost);
69 }
70 hostField.selectAll();
71 okButton.addActionListener(new ActionListener () {
72 public void actionPerformed(ActionEvent e) { ok(); }
73 });
74 cancelButton.addActionListener(new ActionListener () {
75 public void actionPerformed(ActionEvent e) { cancel(); }
76 });
77 okButton.setMnemonic(KeyEvent.VK_O);
78 cancelButton.setMnemonic(KeyEvent.VK_C);
79 getRootPane().setDefaultButton(okButton);
80
81 setDefaultCloseOperation(DISPOSE_ON_CLOSE);
83 Util.centerOnScreen(this);
84 }
85
86 String getHost() {
87 return host;
88 }
89
90 private void ok() {
91 String hostEntered = hostField.getText();
92 if(hostEntered.length() == 0) {
93 Util.warn(this, "Please enter host address");
94 }
95 else {
96 host = hostEntered;
97 saveHostToFile();
98 close();
99 }
100 }
101
102 private void close() {
103 dispatchEvent(new WindowEvent (this, WindowEvent.WINDOW_CLOSING));
104 }
105
106 private void cancel() {
107 close();
108 }
109
110 private void saveHostToFile() {
111 PrintWriter pw = null;
112 try {
113 pw = new PrintWriter(new FileWriter(HOST_FILENAME, false));
114 pw.println(host);
115 }
116 catch (IOException e) {
117 }
118 finally {
119 if(pw != null) {
120 pw.close();
121 }
122 }
123 }
124
125 private String getHostFromFile() {
126 BufferedReader reader = null;
127 try {
128 reader = new BufferedReader(new FileReader(HOST_FILENAME));
129 return reader.readLine();
130 }
131 catch (IOException e) {
132 return null;
133 }
134 finally {
135 if(reader != null) {
136 try {
137 reader.close();
138 }
139 catch(IOException e) { }
140 }
141 }
142 }
143 }
144 |
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