Source Code Cross Referenced for ComboBoxAutoCompletion.java in  » IDE-Netbeans » visualweb.api.designer » org » netbeans » modules » visualweb » ejb » ui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Netbeans » visualweb.api.designer » org.netbeans.modules.visualweb.ejb.ui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003:         *
004:         * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005:         *
006:         * The contents of this file are subject to the terms of either the GNU
007:         * General Public License Version 2 only ("GPL") or the Common
008:         * Development and Distribution License("CDDL") (collectively, the
009:         * "License"). You may not use this file except in compliance with the
010:         * License. You can obtain a copy of the License at
011:         * http://www.netbeans.org/cddl-gplv2.html
012:         * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013:         * specific language governing permissions and limitations under the
014:         * License.  When distributing the software, include this License Header
015:         * Notice in each file and include the License file at
016:         * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this
017:         * particular file as subject to the "Classpath" exception as provided
018:         * by Sun in the GPL Version 2 section of the License file that
019:         * accompanied this code. If applicable, add the following below the
020:         * License Header, with the fields enclosed by brackets [] replaced by
021:         * your own identifying information:
022:         * "Portions Copyrighted [year] [name of copyright owner]"
023:         *
024:         * Contributor(s):
025:         *
026:         * The Original Software is NetBeans. The Initial Developer of the Original
027:         * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
028:         * Microsystems, Inc. All Rights Reserved.
029:         *
030:         * If you wish your version of this file to be governed by only the CDDL
031:         * or only the GPL Version 2, indicate your decision by adding
032:         * "[Contributor] elects to include this software in this distribution
033:         * under the [CDDL or GPL Version 2] license." If you do not indicate a
034:         * single choice of license, a recipient has the option to distribute
035:         * your version of this file under either the CDDL, the GPL Version 2 or
036:         * to extend the choice of license to its licensees as provided above.
037:         * However, if you add GPL Version 2 code and therefore, elected the GPL
038:         * Version 2 license, then the option applies only if the new code is
039:         * made subject to such option by the copyright holder.
040:         */
041:        /*
042:         * AutoCompleteComboBox.java
043:         *
044:         * Created on March 27, 2005, 9:24 AM
045:         */
046:
047:        package org.netbeans.modules.visualweb.ejb.ui;
048:
049:        import org.netbeans.modules.visualweb.ejb.datamodel.EjbGroup;
050:        import org.netbeans.modules.visualweb.ejb.datamodel.MethodInfo;
051:        import org.netbeans.modules.visualweb.ejb.load.EjbLoaderHelper;
052:        import java.awt.event.ActionEvent;
053:        import java.awt.event.ActionListener;
054:        import java.awt.event.FocusAdapter;
055:        import java.awt.event.FocusEvent;
056:        import java.awt.event.KeyAdapter;
057:        import java.awt.event.KeyEvent;
058:        import java.net.URLClassLoader;
059:        import javax.swing.ComboBoxModel;
060:        import javax.swing.JComboBox;
061:        import javax.swing.JFrame;
062:        import javax.swing.text.AttributeSet;
063:        import javax.swing.text.BadLocationException;
064:        import javax.swing.text.JTextComponent;
065:        import javax.swing.text.PlainDocument;
066:        import org.openide.DialogDisplayer;
067:        import org.openide.NotifyDescriptor;
068:
069:        /**
070:         * Provides auto-completion of the given combo box
071:         *
072:         * @author  cao
073:         */
074:        public class ComboBoxAutoCompletion extends PlainDocument {
075:            private JComboBox comboBox;
076:            private ComboBoxModel model;
077:            private JTextComponent editor;
078:
079:            // flag to indicate if setSelectedItem has been called
080:            // subsequent calls to remove/insertString should be ignored
081:            private boolean selecting = false;
082:            private boolean hidePopupOnFocusLoss;
083:            private boolean hitBackspace = false;
084:            private boolean hitBackspaceOnSelection;
085:            private boolean listContainsSelectedItem;
086:
087:            // Flag to indicate if the enter key just pressed
088:            private boolean enterKeyPressed = false;
089:
090:            private EjbGroup ejbGroup;
091:            private MethodInfo methodInfo;
092:            private URLClassLoader classloader;
093:
094:            public ComboBoxAutoCompletion(JComboBox combobox) {
095:                this .comboBox = combobox;
096:
097:                model = comboBox.getModel();
098:                editor = (JTextComponent) comboBox.getEditor()
099:                        .getEditorComponent();
100:                editor.setDocument(this );
101:                comboBox.addActionListener(new ActionListener() {
102:                    public void actionPerformed(ActionEvent e) {
103:                        if (!selecting)
104:                            highlightCompletedText(0);
105:
106:                        if (methodInfo != null) {
107:                            // Only validate if the enter key is pressed
108:                            if (enterKeyPressed) {
109:                                validateColElemClassName((String) comboBox
110:                                        .getSelectedItem());
111:                            }
112:                        }
113:                    }
114:                });
115:                editor.addKeyListener(new KeyAdapter() {
116:                    public void keyPressed(KeyEvent e) {
117:                        if (comboBox.isDisplayable())
118:                            comboBox.setPopupVisible(true);
119:                        hitBackspace = false;
120:                        enterKeyPressed = false;
121:
122:                        switch (e.getKeyCode()) {
123:                        // determine if the pressed key is backspace (needed by the remove method)
124:                        case KeyEvent.VK_BACK_SPACE:
125:                            hitBackspace = true;
126:                            hitBackspaceOnSelection = editor
127:                                    .getSelectionStart() != editor
128:                                    .getSelectionEnd();
129:                            break;
130:
131:                        case KeyEvent.VK_ENTER:
132:                            enterKeyPressed = true;
133:                            break;
134:                        }
135:                    }
136:                });
137:                // Bug 5100422 on Java 1.5: Editable JComboBox won't hide popup when tabbing out
138:                hidePopupOnFocusLoss = System.getProperty("java.version")
139:                        .startsWith("1.5");
140:                // Highlight whole text when gaining focus
141:                editor.addFocusListener(new FocusAdapter() {
142:                    public void focusGained(FocusEvent e) {
143:                        highlightCompletedText(0);
144:                    }
145:
146:                    public void focusLost(FocusEvent e) {
147:                        // Workaround for Bug 5100422 - Hide Popup on focus loss
148:                        if (hidePopupOnFocusLoss)
149:                            comboBox.setPopupVisible(false);
150:                    }
151:                });
152:                // Handle initially selected object
153:                Object selected = comboBox.getSelectedItem();
154:                if (selected != null)
155:                    setText(selected.toString());
156:                highlightCompletedText(0);
157:            }
158:
159:            public void setEjbGroup(EjbGroup ejbGroup) {
160:                this .ejbGroup = ejbGroup;
161:            }
162:
163:            public void setMethodInfo(MethodInfo methodInfo) {
164:                this .methodInfo = methodInfo;
165:            }
166:
167:            public void validateColElemClassName(String className) {
168:
169:                // Only if the method has return type of Collection
170:                if (!methodInfo.getReturnType().isCollection())
171:                    return;
172:
173:                // TODO ignore null or empty for now
174:                if (className == null || className.trim().length() == 0)
175:                    return;
176:
177:                if (classloader == null)
178:                    classloader = EjbLoaderHelper
179:                            .getEjbGroupClassLoader(ejbGroup);
180:
181:                // Make sure that the element class specified by the user is a valid one
182:                try {
183:                    Class c = Class.forName(className, true, classloader);
184:                } catch (java.lang.ClassNotFoundException ce) {
185:                    NotifyDescriptor d = new NotifyDescriptor.Message("Class "
186:                            + className + " not found", /*NbBundle.getMessage(MethodNode.class, "PARAMETER_NAME_NOT_UNIQUE", name ),*/
187:                            NotifyDescriptor.ERROR_MESSAGE);
188:                    DialogDisplayer.getDefault().notify(d);
189:                    return;
190:                }
191:            }
192:
193:            public void remove(int offs, int len) throws BadLocationException {
194:                // return immediately when selecting an item
195:                if (selecting)
196:                    return;
197:                if (hitBackspace) {
198:                    if (listContainsSelectedItem) {
199:                        // move the selection backwards
200:                        // old item keeps being selected
201:                        if (offs > 0) {
202:                            if (hitBackspaceOnSelection)
203:                                offs--;
204:                        } else {
205:                            // User hit backspace with the cursor positioned on the start => beep
206:                            comboBox.getToolkit().beep(); // when available use: UIManager.getLookAndFeel().provideErrorFeedback(comboBox);
207:                        }
208:                        highlightCompletedText(offs);
209:                        return;
210:                    } else {
211:                        super .remove(offs, len);
212:                        String currentText = getText(0, getLength());
213:                        // lookup if a matching item exists
214:                        Object item = lookupItem(currentText);
215:                        if (item != null) {
216:                            //System.out.println("'" + item + "' matches.");
217:                            setSelectedItem(item);
218:                            listContainsSelectedItem = true;
219:                        } else {
220:                            //System.out.println("No match. Selecting '" + currentText + "'.");
221:                            // no item matches => use the current input as selected item
222:                            item = currentText;
223:                            setSelectedItem(item);
224:                            listContainsSelectedItem = false;
225:                        }
226:                        // display the completed string
227:                        String itemString = item.toString();
228:                        setText(itemString);
229:                        if (listContainsSelectedItem)
230:                            highlightCompletedText(offs);
231:                    }
232:                } else {
233:                    super .remove(offs, len);
234:                    setSelectedItem(getText(0, getLength()));
235:                    listContainsSelectedItem = false;
236:                }
237:            }
238:
239:            public void insertString(int offs, String str, AttributeSet a)
240:                    throws BadLocationException {
241:                // return immediately when selecting an item
242:                if (selecting)
243:                    return;
244:                // insert the string into the document
245:                super .insertString(offs, str, a);
246:                // lookup and select a matching item
247:                Object item = lookupItem(getText(0, getLength()));
248:
249:                listContainsSelectedItem = true;
250:                if (item == null) {
251:                    // no item matches => use the current input as selected item
252:                    item = getText(0, getLength());
253:                    listContainsSelectedItem = false;
254:                }
255:                setSelectedItem(item);
256:                setText(item.toString());
257:                // select the completed part
258:                if (listContainsSelectedItem)
259:                    highlightCompletedText(offs + str.length());
260:            }
261:
262:            private void setText(String text) {
263:                try {
264:                    // remove all text and insert the completed string
265:                    super .remove(0, getLength());
266:                    super .insertString(0, text, null);
267:                } catch (BadLocationException e) {
268:                    throw new RuntimeException(e.toString());
269:                }
270:            }
271:
272:            private void highlightCompletedText(int start) {
273:                editor.setCaretPosition(getLength());
274:                editor.moveCaretPosition(start);
275:            }
276:
277:            private void setSelectedItem(Object item) {
278:                selecting = true;
279:                model.setSelectedItem(item);
280:                selecting = false;
281:            }
282:
283:            private Object lookupItem(String pattern) {
284:                Object selectedItem = model.getSelectedItem();
285:                // only search for a different item if the currently selected does not match
286:                if (selectedItem != null
287:                        && startsWithIgnoreCase(selectedItem.toString(),
288:                                pattern) && listContainsSelectedItem) {
289:                    return selectedItem;
290:                } else {
291:                    // iterate over all items
292:                    for (int i = 0, n = model.getSize(); i < n; i++) {
293:                        Object currentItem = model.getElementAt(i);
294:                        // current item starts with the pattern?
295:                        //if (startsWithIgnoreCase(currentItem.toString(), pattern)) {
296:                        if (currentItem.toString().startsWith(pattern)) { // Case sensitive
297:                            return currentItem;
298:                        }
299:                    }
300:                }
301:                // no item starts with the pattern => return null
302:                return null;
303:            }
304:
305:            // checks if str1 starts with str2 - ignores case
306:            private boolean startsWithIgnoreCase(String str1, String str2) {
307:                return str1.toUpperCase().startsWith(str2.toUpperCase());
308:            }
309:
310:            private static void createAndShowGUI() {
311:                // the combo box (add/modify items if you like to)
312:                JComboBox comboBox = new JComboBox(new Object[] { "Ester",
313:                        "Jordi", "Jordina", "Jorge", "Sergi" });
314:                // has to be editable
315:                comboBox.setEditable(true);
316:                // change the editor's document
317:                new ComboBoxAutoCompletion(comboBox);
318:
319:                // create and show a window containing the combo box
320:                JFrame frame = new JFrame();
321:                frame.setDefaultCloseOperation(3);
322:                frame.getContentPane().add(comboBox);
323:                frame.pack();
324:                frame.setVisible(true);
325:            }
326:
327:            public static void main(String[] args) {
328:                javax.swing.SwingUtilities.invokeLater(new Runnable() {
329:                    public void run() {
330:                        createAndShowGUI();
331:                    }
332:                });
333:            }
334:        }
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