Source Code Cross Referenced for JNumberComboBox.java in  » Report » iReport-2.0.5 » it » businesslogic » ireport » gui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Report » iReport 2.0.5 » it.businesslogic.ireport.gui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (C) 2005 - 2008 JasperSoft Corporation.  All rights reserved. 
003:         * http://www.jaspersoft.com.
004:         *
005:         * Unless you have purchased a commercial license agreement from JasperSoft,
006:         * the following license terms apply:
007:         *
008:         * This program is free software; you can redistribute it and/or modify
009:         * it under the terms of the GNU General Public License version 2 as published by
010:         * the Free Software Foundation.
011:         *
012:         * This program is distributed WITHOUT ANY WARRANTY; and without the
013:         * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
014:         * See the GNU General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU General Public License
017:         * along with this program; if not, see http://www.gnu.org/licenses/gpl.txt
018:         * or write to:
019:         *
020:         * Free Software Foundation, Inc.,
021:         * 59 Temple Place - Suite 330,
022:         * Boston, MA  USA  02111-1307
023:         *
024:         *
025:         *
026:         *
027:         * JNumberComboBox.java
028:         * 
029:         * Created on 15 febbraio 2003, 10.31
030:         *
031:         */
032:
033:        package it.businesslogic.ireport.gui;
034:
035:        import it.businesslogic.ireport.gui.event.*;
036:        import javax.swing.*;
037:        import java.awt.event.*;
038:        import java.util.*;
039:        import java.text.*;
040:
041:        /**
042:         *  This class is designed for the zoom combo box.
043:         *  It stores a vector of predefined values (see the inner class NumberEntry),
044:         *  added from the program using  addEntry(String name, double value) method.
045:         *  The user can insert manually a value. It is interpreted using NumberFormat.
046:         *  (max fraction digits used:  2) 
047:         *  The value is valuated on focus lost....
048:         *  
049:         * @author  Giulio Toffoli
050:         */
051:        public class JNumberComboBox extends JComboBox implements  KeyListener,
052:                ItemListener, FocusListener {
053:
054:            private NumberFormat numberFormat = null;
055:            private Vector entries;
056:
057:            private double value;
058:
059:            private double minValue;
060:
061:            private double maxValue;
062:
063:            private boolean setting = false;
064:
065:            /** Utility field used by event firing mechanism. */
066:            private javax.swing.event.EventListenerList listenerList = null;
067:
068:            private String postfix = "";
069:
070:            /** Creates a new instance of JNumberComboBox */
071:            public JNumberComboBox() {
072:
073:                super ();
074:                entries = new Vector();
075:                this .setFocusCycleRoot(false);
076:                numberFormat = NumberFormat.getNumberInstance();
077:                numberFormat.setMinimumFractionDigits(0);
078:                numberFormat.setMaximumFractionDigits(2);
079:                this .setEditable(true);
080:
081:                // this code solve sun Metal Bug Id  4137675 
082:                // Attention, this.setEditable(true); must be call before!!!
083:                for (int i = 0; i < this .getComponentCount(); i++) {
084:                    //System.out.println("Register to: "+ this.getComponent(i).getClass());
085:                    this .getComponent(i).addFocusListener(this );
086:                }
087:
088:                this .addFocusListener(this );
089:                this .addKeyListener(this );
090:                //this.addItemListener(this);
091:                this .addActionListener(this );
092:            }
093:
094:            public void addEntry(String name, double value) {
095:                // If this entry name already exists, we change the value...
096:                Enumeration e = entries.elements();
097:                while (e.hasMoreElements()) {
098:                    NumberEntry ne = (NumberEntry) e.nextElement();
099:                    if (ne.name.equals(name)) {
100:                        ne.value = value;
101:                        return;
102:                    }
103:                }
104:                NumberEntry entry = new NumberEntry(name, value);
105:                this .addItem(entry);
106:                this .entries.addElement(entry);
107:            }
108:
109:            public void actionPerformed(ActionEvent e) {
110:                if (isSetting())
111:                    return;
112:                //System.out.println("actionPerformed Item: "+ this.getSelectedItem() );
113:                super .actionPerformed(e);
114:
115:                if (this .getSelectedItem() != null) {
116:                    Object obj = getSelectedItem();
117:                    if (obj instanceof  NumberEntry) {
118:                        if (((NumberEntry) getSelectedItem()).value != value) {
119:
120:                            double oldValue = this .value;
121:                            this .value = ((NumberEntry) getSelectedItem()).value;
122:                            fireValueChangedListenerValueChanged(new ValueChangedEvent(
123:                                    (JComponent) this , oldValue, this .value));
124:
125:                        }
126:
127:                    } else {
128:                        String s = "" + getSelectedItem();
129:                        try {
130:                            Number nb = numberFormat.parse(s);
131:                            double oldValue = this .value;
132:                            this .value = nb.doubleValue();
133:                            fireValueChangedListenerValueChanged(new ValueChangedEvent(
134:                                    (JComponent) this , oldValue, this .value));
135:                        } catch (Exception ex) {
136:
137:                        }
138:                    }
139:                    this .setSetting(true);
140:                    this .setSelectedItem(numberFormat.format(value)
141:                            + getPostfix());
142:                    this .setSetting(false);
143:                }
144:            }
145:
146:            /** Invoked when a key has been pressed.
147:             * See the class description for {@link KeyEvent} for a definition of
148:             * a key pressed event.
149:             *
150:             */
151:            public void keyPressed(KeyEvent e) {
152:                if (e.getKeyCode() == e.VK_ENTER) {
153:                    e.consume();
154:                    FocusManager.getCurrentManager().focusNextComponent();
155:
156:                }
157:            }
158:
159:            /** Invoked when a key has been released.
160:             * See the class description for {@link KeyEvent} for a definition of
161:             * a key released event.
162:             *
163:             */
164:            public void keyReleased(KeyEvent e) {
165:            }
166:
167:            /** Invoked when a key has been typed.
168:             * See the class description for {@link KeyEvent} for a definition of
169:             * a key typed event.
170:             *
171:             */
172:            public void keyTyped(KeyEvent e) {
173:            }
174:
175:            /** Invoked when a component gains the keyboard focus.
176:             *
177:             */
178:            public void focusGained(FocusEvent e) {
179:            }
180:
181:            /** Invoked when a component loses the keyboard focus.
182:             *
183:             */
184:            public void focusLost(FocusEvent e) {
185:                acceptResultNow();
186:            }
187:
188:            public void acceptResultNow() {
189:                try {
190:
191:                    Number num = numberFormat
192:                            .parse("" + this .getSelectedItem());
193:
194:                    if (num.doubleValue() != value) {
195:                        double oldValue = this .value;
196:                        this .value = num.doubleValue();
197:                        fireValueChangedListenerValueChanged(new ValueChangedEvent(
198:                                this , oldValue, this .value));
199:                    }
200:                } catch (Exception ex) {
201:                    //System.out.println(ex.getMessage());
202:                    fireValueChangedListenerValueChanged(new ValueChangedEvent(
203:                            this , this .value, this .value));
204:                }
205:                boolean setting = isSetting();
206:                this .setSetting(true);
207:                this .setSelectedItem(numberFormat.format(value) + getPostfix());
208:                this .setSetting(setting);
209:            }
210:
211:            /** Getter for property minValue.
212:             * @return Value of property minValue.
213:             *
214:             */
215:            public double getMinValue() {
216:                return minValue;
217:            }
218:
219:            /** Setter for property minValue.
220:             * @param minValue New value of property minValue.
221:             *
222:             */
223:            public void setMinValue(double minValue) {
224:                this .minValue = minValue;
225:            }
226:
227:            /** Getter for property maxValue.
228:             * @return Value of property maxValue.
229:             *
230:             */
231:            public double getMaxValue() {
232:                return maxValue;
233:            }
234:
235:            /** Setter for property maxValue.
236:             * @param maxValue New value of property maxValue.
237:             *
238:             */
239:            public void setMaxValue(double maxValue) {
240:                this .maxValue = maxValue;
241:            }
242:
243:            /** Getter for property value.
244:             * @return Value of property value.
245:             *
246:             */
247:            public double getValue() {
248:                return value;
249:            }
250:
251:            /** Setter for property value.
252:             * @param value New value of property value.
253:             *
254:             */
255:            public void setValue(double value) {
256:                if (this .value != value) {
257:                    double oldValue = this .value;
258:                    this .value = value;
259:                    fireValueChangedListenerValueChanged(new ValueChangedEvent(
260:                            this , oldValue, this .value));
261:                }
262:                boolean setting = isSetting();
263:                this .setSetting(true);
264:                this .setSelectedItem(numberFormat.format(this .value)
265:                        + getPostfix());
266:                this .setSetting(setting);
267:            }
268:
269:            /** Registers ValueChangedListener to receive events.
270:             * @param listener The listener to register.
271:             *
272:             */
273:            public synchronized void addValueChangedListener(
274:                    it.businesslogic.ireport.gui.event.ValueChangedListener listener) {
275:                if (listenerList == null) {
276:                    listenerList = new javax.swing.event.EventListenerList();
277:                }
278:                listenerList
279:                        .add(
280:                                it.businesslogic.ireport.gui.event.ValueChangedListener.class,
281:                                listener);
282:            }
283:
284:            /** Removes ValueChangedListener from the list of listeners.
285:             * @param listener The listener to remove.
286:             *
287:             */
288:            public synchronized void removeValueChangedListener(
289:                    it.businesslogic.ireport.gui.event.ValueChangedListener listener) {
290:                listenerList
291:                        .remove(
292:                                it.businesslogic.ireport.gui.event.ValueChangedListener.class,
293:                                listener);
294:            }
295:
296:            /** Notifies all registered listeners about the event.
297:             *
298:             * @param event The event to be fired
299:             *
300:             */
301:            private void fireValueChangedListenerValueChanged(
302:                    it.businesslogic.ireport.gui.event.ValueChangedEvent event) {
303:                if (listenerList == null)
304:                    return;
305:                Object[] listeners = listenerList.getListenerList();
306:                for (int i = listeners.length - 2; i >= 0; i -= 2) {
307:                    if (listeners[i] == it.businesslogic.ireport.gui.event.ValueChangedListener.class) {
308:                        ((it.businesslogic.ireport.gui.event.ValueChangedListener) listeners[i + 1])
309:                                .valueChanged(event);
310:                    }
311:                }
312:            }
313:
314:            /** Getter for property postfix.
315:             * @return Value of property postfix.
316:             *
317:             */
318:            public java.lang.String getPostfix() {
319:                return postfix;
320:            }
321:
322:            /** Setter for property postfix.
323:             * @param postfix New value of property postfix.
324:             *
325:             */
326:            public void setPostfix(java.lang.String postfix) {
327:                this .postfix = postfix;
328:            }
329:
330:            public boolean isSetting() {
331:                return setting;
332:            }
333:
334:            public void setSetting(boolean setting) {
335:                this .setting = setting;
336:            }
337:
338:            public void itemStateChanged(ItemEvent e) {
339:
340:                if (isSetting())
341:                    return;
342:                if (e.getStateChange() == e.SELECTED) {
343:                    actionPerformed(null);
344:                }
345:            }
346:
347:        }
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