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1
11 package org.eclipse.jface.contentassist;
12
13 import java.util.HashMap  ;
14
15 import org.eclipse.swt.SWT;
16 import org.eclipse.swt.events.ModifyEvent;
17 import org.eclipse.swt.events.ModifyListener;
18 import org.eclipse.swt.events.SelectionEvent;
19 import org.eclipse.swt.events.SelectionListener;
20 import org.eclipse.swt.graphics.GC;
21 import org.eclipse.swt.graphics.Point;
22 import org.eclipse.swt.widgets.Combo;
23 import org.eclipse.swt.widgets.Control;
24 import org.eclipse.swt.widgets.Event;
25 import org.eclipse.swt.widgets.Listener;
26
27 import org.eclipse.core.runtime.Assert;
28
29 import org.eclipse.jface.text.BadLocationException;
30 import org.eclipse.jface.text.Document;
31 import org.eclipse.jface.text.IDocument;
32
33
34
35
52 public class ComboContentAssistSubjectAdapter extends AbstractControlContentAssistSubjectAdapter {
53
54
57 private class InternalDocument extends Document {
58
61 private ModifyListener fModifyListener;
62
63 private InternalDocument() {
64 super(fCombo.getText());
65 fModifyListener= new ModifyListener() {
66
69 public void modifyText(ModifyEvent e) {
70 set(fCombo.getText());
71 }
72 };
73 fCombo.addModifyListener(fModifyListener);
74 }
75
76
79 public void replace(int pos, int length, String text) throws BadLocationException {
80 super.replace(pos, length, text);
81 fCombo.removeModifyListener(fModifyListener);
82 fCombo.setText(get());
83 fCombo.addModifyListener(fModifyListener);
84 }
85 }
86
87
90 private Combo fCombo;
91 private HashMap fModifyListeners;
92
93
98 public ComboContentAssistSubjectAdapter(Combo combo) {
99 Assert.isNotNull(combo);
100 fCombo= combo;
101 fModifyListeners= new HashMap ();
102 }
103
104
107 public Control getControl() {
108 return fCombo;
109 }
110
111
114 public int getLineHeight() {
115 return fCombo.getTextHeight();
116 }
117
118
121 public int getCaretOffset() {
122 return fCombo.getSelection().y;
123 }
124
125
128 public Point getLocationAtOffset(int offset) {
129 String comboString= fCombo.getText();
130 GC gc = new GC(fCombo);
131 gc.setFont(fCombo.getFont());
132 Point extent= gc.textExtent(comboString.substring(0, Math.min(offset, comboString.length())));
133 int spaceWidth= gc.textExtent(" ").x; gc.dispose();
135
138 int x= 2 * spaceWidth + fCombo.getClientArea().x + fCombo.getBorderWidth() + extent.x;
139 return new Point(x, fCombo.getClientArea().y);
140 }
141
142
145 public Point getWidgetSelectionRange() {
146 return new Point(fCombo.getSelection().x, Math.abs(fCombo.getSelection().y - fCombo.getSelection().x));
147 }
148
149
152 public Point getSelectedRange() {
153 return new Point(fCombo.getSelection().x, Math.abs(fCombo.getSelection().y - fCombo.getSelection().x));
154 }
155
156
159 public IDocument getDocument() {
160 IDocument document= (IDocument)fCombo.getData("document"); if (document == null) {
162 document= new InternalDocument() ;
163 fCombo.setData("document", document); }
165 return document;
166 }
167
168
171 public void setSelectedRange(int i, int j) {
172 fCombo.setSelection(new Point(i, i+j));
173 }
174
175
178 public void revealRange(int i, int j) {
179 fCombo.setSelection(new Point(i, i+j));
181 }
182
183
186 public boolean addSelectionListener(final SelectionListener selectionListener) {
187 fCombo.addSelectionListener(selectionListener);
188 Listener listener= new Listener() {
189
192 public void handleEvent(Event e) {
193 selectionListener.widgetSelected(new SelectionEvent(e));
194
195 }
196 };
197 fCombo.addListener(SWT.Modify, listener);
198 fModifyListeners.put(selectionListener, listener);
199 return true;
200 }
201
202
205 public void removeSelectionListener(SelectionListener selectionListener) {
206 fCombo.removeSelectionListener(selectionListener);
207 Object listener= fModifyListeners.get(selectionListener);
208 if (listener instanceof Listener)
209 fCombo.removeListener(SWT.Modify, (Listener)listener);
210 }
211 }
212 |
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