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1
4 package com.tc.admin.common;
5
6 import java.awt.event.ActionEvent  ;
7
8 import javax.swing.Action ;
9 import javax.swing.ImageIcon ;
10 import javax.swing.JPopupMenu ;
11 import javax.swing.event.CaretEvent ;
12 import javax.swing.event.CaretListener ;
13 import javax.swing.text.BadLocationException ;
14 import javax.swing.text.Document ;
15 import javax.swing.text.JTextComponent ;
16
17 public class TextComponentHelper extends XPopupListener
18 implements CaretListener
19 {
20 protected JTextComponent m_component;
21 protected CutAction m_cutAction;
22 protected CopyAction m_copyAction;
23 protected PasteAction m_pasteAction;
24 protected ClearAction m_clearAction;
25
26 public TextComponentHelper() {
27 super();
28 }
29
30 public TextComponentHelper(JTextComponent component) {
31 this();
32 setTarget(component);
33 }
34
35 protected void setTarget(JTextComponent component) {
36 if(m_component != null) {
37 m_component.removeCaretListener(this);
38 }
39
40 super.setTarget(m_component = component);
41
42 if(component != null) {
43 component.addCaretListener(this);
44 }
45 }
46
47 public JPopupMenu createPopup() {
48 JPopupMenu popup = new JPopupMenu ("TextComponent Actions");
49
50 addCutAction(popup);
51 addCopyAction(popup);
52 addPasteAction(popup);
53 addClearAction(popup);
54
55 return popup;
56 }
57
58 protected void addCutAction(JPopupMenu popup) {
59 popup.add(m_cutAction = new CutAction());
60 }
61
62 public Action getCutAction() {
63 return m_cutAction;
64 }
65
66 protected void addCopyAction(JPopupMenu popup) {
67 popup.add(m_copyAction = new CopyAction());
68 }
69
70 public Action getCopyAction() {
71 return m_copyAction;
72 }
73
74 protected void addPasteAction(JPopupMenu popup) {
75 popup.add(m_pasteAction = new PasteAction());
76 }
77
78 public Action getPasteAction() {
79 return m_pasteAction;
80 }
81
82 protected void addClearAction(JPopupMenu popup) {
83 popup.add(m_clearAction = new ClearAction());
84 }
85
86 public Action getClearAction() {
87 return m_clearAction;
88 }
89
90 protected class CutAction extends XAbstractAction {
91 protected CutAction() {
92 super("Cut");
93 String uri = "/com/tc/admin/icons/cut_edit.gif";
94 setSmallIcon(new ImageIcon (getClass().getResource(uri)));
95 }
96
97 public void actionPerformed(ActionEvent ae) {
98 m_component.cut();
99 }
100 }
101
102 protected class CopyAction extends XAbstractAction {
103 protected CopyAction() {
104 super("Copy");
105 String uri = "/com/tc/admin/icons/copy_edit.gif";
106 setSmallIcon(new ImageIcon (getClass().getResource(uri)));
107 }
108
109 public void actionPerformed(ActionEvent ae) {
110 m_component.copy();
111 }
112 }
113
114 protected class PasteAction extends XAbstractAction {
115 protected PasteAction() {
116 super("Paste");
117 String uri = "/com/tc/admin/icons/paste_edit.gif";
118 setSmallIcon(new ImageIcon (getClass().getResource(uri)));
119 }
120
121 public void actionPerformed(ActionEvent ae) {
122 m_component.paste();
123 }
124 }
125
126 protected class ClearAction extends XAbstractAction {
127 protected ClearAction() {
128 super("Clear");
129 String uri = "/com/tc/admin/icons/clear_co.gif";
130 setSmallIcon(new ImageIcon (getClass().getResource(uri)));
131 }
132
133 public void actionPerformed(ActionEvent ae) {
134 Document doc = m_component.getDocument();
135
136 try {
137 doc.remove(0, doc.getLength());
138 } catch(BadLocationException ble) {}
139 }
140 }
141
142 public boolean hasSelectionRange() {
143 return (m_component.getSelectionStart()-m_component.getSelectionEnd()) != 0;
144 }
145
146 private void testEnableMenuItems() {
147 boolean hasSelectionRange = hasSelectionRange();
148 boolean editable = m_component.isEditable();
149
150 if(m_cutAction != null) {
151 m_cutAction.setEnabled(editable && hasSelectionRange);
152 }
153
154 if(m_copyAction != null) {
155 m_copyAction.setEnabled(hasSelectionRange);
156 }
157
158 if(m_pasteAction != null) {
159 m_pasteAction.setEnabled(editable);
160 }
161
162 if(m_clearAction != null) {
163 m_clearAction.setEnabled(m_component.getDocument().getLength() > 0);
164 }
165 }
166
167 public void caretUpdate(CaretEvent e) {
168 testEnableMenuItems();
169 }
170 }
171 |
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