Source Code Cross Referenced for FocusBox.java in  » Swing-Library » abeille-forms-designer » com » jeta » swingbuilder » gui » focus » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Swing Library » abeille forms designer » com.jeta.swingbuilder.gui.focus 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (C) 2005 Jeff Tassin
003:         *
004:         * This library is free software; you can redistribute it and/or
005:         * modify it under the terms of the GNU Lesser General Public
006:         * License as published by the Free Software Foundation; either
007:         * version 2.1 of the License, or (at your option) any later version.
008:         *
009:         * This library is distributed in the hope that it will be useful,
010:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
011:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
012:         * Lesser General Public License for more details.
013:         *
014:         * You should have received a copy of the GNU Lesser General Public
015:         * License along with this library; if not, write to the Free Software
016:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
017:         */
018:
019:        package com.jeta.swingbuilder.gui.focus;
020:
021:        import java.awt.BorderLayout;
022:        import java.awt.Color;
023:        import java.awt.Component;
024:        import java.awt.Dimension;
025:        import java.awt.Font;
026:        import java.awt.FontMetrics;
027:        import java.awt.Graphics;
028:        import java.awt.event.ActionEvent;
029:        import java.awt.event.ActionListener;
030:        import java.awt.event.MouseAdapter;
031:        import java.awt.event.MouseEvent;
032:        import java.util.Iterator;
033:        import java.util.LinkedList;
034:
035:        import javax.swing.JComponent;
036:        import javax.swing.JPanel;
037:        import javax.swing.JSpinner;
038:        import javax.swing.SpinnerNumberModel;
039:        import javax.swing.UIManager;
040:        import javax.swing.event.ChangeEvent;
041:        import javax.swing.event.ChangeListener;
042:
043:        /**
044:         * This component renders the focus order icons over the Form.
045:         * 
046:         * @author Jeff Tassin
047:         */
048:        public class FocusBox extends JPanel {
049:            /**
050:             * Displays the current focus index when this focusbox does not have 'focus'
051:             */
052:            private FocusGlyph m_focus_glyph;
053:
054:            /**
055:             * A spinner box used to edit the current focus value. Only visible when
056:             * this focusbox has 'focus' (i.e. the user clicked on this focusbox with
057:             * the mouse
058:             */
059:            private JSpinner m_spinner;
060:
061:            /**
062:             * Flag that indicates if the spinner is active
063:             */
064:            private boolean m_spinner_active = false;
065:
066:            /**
067:             * The current focus index
068:             */
069:            private int m_index;
070:
071:            /**
072:             * The max allowed focus index
073:             */
074:            private int m_max_index;
075:
076:            /**
077:             * The form component associated with this box
078:             */
079:            private Component m_component;
080:
081:            /**
082:             * A list of ActionListeners that want events for this FocusBox
083:             */
084:            private LinkedList m_listeners;
085:
086:            private Color m_background = Color.blue.darker().darker();
087:            private Color m_foreground = Color.white;
088:
089:            /**
090:             * Action commands
091:             */
092:            public static final String FOCUS_INDEX_CHANGED = "focus.index.changed";
093:            public static final String FOCUS_BOX_ACTIVATED = "focus.box.activated";
094:
095:            /** ctor */
096:            public FocusBox(int index, int maxIndex, Component comp) {
097:                m_index = index;
098:                m_max_index = maxIndex;
099:                m_component = comp;
100:
101:                m_focus_glyph = new FocusGlyph(index, m_foreground,
102:                        m_background);
103:                setLayout(new BorderLayout());
104:                add(m_focus_glyph, BorderLayout.CENTER);
105:
106:                m_focus_glyph.addMouseListener(new MouseAdapter() {
107:                    public void mousePressed(MouseEvent evt) {
108:                        remove(m_focus_glyph);
109:                        JSpinner spinner = getSpinner();
110:                        remove(spinner);
111:                        Dimension d = spinner.getPreferredSize();
112:                        // d.width = d.width*3/2;
113:                        setSize(d);
114:                        add(spinner);
115:                        revalidate();
116:                        m_spinner_active = true;
117:                        notifyListeners(new ActionEvent(FocusBox.this ,
118:                                ActionEvent.ACTION_PERFORMED,
119:                                FOCUS_BOX_ACTIVATED));
120:                    }
121:                });
122:            }
123:
124:            /**
125:             * Adds an action listener to this focusbox. A call can get an action event
126:             * when the focus index changes or the user has clicked on this focus box.
127:             */
128:            public void addActionListener(ActionListener listener) {
129:                if (m_listeners == null)
130:                    m_listeners = new LinkedList();
131:
132:                m_listeners.add(listener);
133:            }
134:
135:            /**
136:             * Hides the spinner. There is no activate spinner because it is handled
137:             * internally in this class.
138:             */
139:            void deactivateSpinner() {
140:                m_spinner_active = false;
141:                if (m_spinner != null) {
142:                    remove(m_spinner);
143:                    remove(m_focus_glyph);
144:                    add(m_focus_glyph);
145:                    revalidate();
146:                    setSize(getPreferredSize());
147:                }
148:            }
149:
150:            /**
151:             * @return the form component associated with this focus box.
152:             */
153:            public Component getComponent() {
154:                return m_component;
155:            }
156:
157:            public int getFocusIndex() {
158:                return m_index;
159:            }
160:
161:            /**
162:             * @return the preferred size for this component
163:             */
164:            public Dimension getPreferredSize() {
165:                if (m_spinner_active)
166:                    return m_spinner.getPreferredSize();
167:                else
168:                    return m_focus_glyph.getPreferredSize();
169:            }
170:
171:            int getSpinnerValue() {
172:                SpinnerNumberModel smodel = (SpinnerNumberModel) m_spinner
173:                        .getModel();
174:                Integer ival = (Integer) smodel.getValue();
175:                return ival.intValue();
176:            }
177:
178:            public void setFocusIndex(int index) {
179:                m_index = index;
180:                if (m_spinner != null) {
181:                    SpinnerNumberModel smodel = (SpinnerNumberModel) m_spinner
182:                            .getModel();
183:                    Integer ival = (Integer) smodel.getValue();
184:                    if (ival.intValue() != index) {
185:                        smodel.setValue(new Integer(index));
186:                    }
187:                }
188:                m_focus_glyph.setIndex(index);
189:                setSize(getPreferredSize());
190:                repaint();
191:            }
192:
193:            /**
194:             * @return the spinner component that is visible when the focus box has
195:             *         'focus'.
196:             */
197:            JSpinner getSpinner() {
198:                if (m_spinner == null) {
199:                    m_spinner = new JSpinner(new SpinnerNumberModel(m_index, 1,
200:                            m_max_index, 1));
201:                    m_spinner.setBorder(javax.swing.BorderFactory
202:                            .createLineBorder(m_background));
203:                    JSpinner.NumberEditor seditor = (JSpinner.NumberEditor) m_spinner
204:                            .getEditor();
205:                    seditor.getTextField().setBackground(m_background);
206:                    seditor.getTextField().setForeground(m_foreground);
207:
208:                    m_spinner.addChangeListener(new ChangeListener() {
209:                        public void stateChanged(ChangeEvent e) {
210:                            notifyListeners(new ActionEvent(FocusBox.this ,
211:                                    ActionEvent.ACTION_PERFORMED,
212:                                    FOCUS_INDEX_CHANGED));
213:                        }
214:                    });
215:                }
216:                return m_spinner;
217:            }
218:
219:            /**
220:             * Notifies all registered listeners that an action has occurred.
221:             */
222:            private void notifyListeners(ActionEvent evt) {
223:                if (m_listeners == null)
224:                    return;
225:
226:                Iterator iter = m_listeners.iterator();
227:                while (iter.hasNext()) {
228:                    ActionListener listener = (ActionListener) iter.next();
229:                    listener.actionPerformed(evt);
230:                }
231:            }
232:
233:            /**
234:             * Removes a previously registered action listener from this focusbox.
235:             */
236:            public void removeActionListener(ActionListener listener) {
237:                if (m_listeners == null)
238:                    return;
239:
240:                m_listeners.remove(listener);
241:            }
242:
243:            /**
244:             * Renders the current focus index.
245:             */
246:            public static class FocusGlyph extends JComponent {
247:                private Font m_font;
248:                private int m_index;
249:                private String m_index_str;
250:
251:                private Dimension m_pref_size = new Dimension();
252:                private Color m_foreground;
253:                private Color m_background;
254:
255:                private static int MARGIN = 4;
256:
257:                /**
258:                 * ctor
259:                 */
260:                public FocusGlyph(int index, Color foreground, Color background) {
261:                    m_index = index;
262:                    m_index_str = String.valueOf(m_index);
263:                    m_font = UIManager.getFont("Table.font");
264:                    m_foreground = foreground;
265:                    m_background = background;
266:                }
267:
268:                /**
269:                 * @return the focus index
270:                 */
271:                public int getIndex() {
272:                    return m_index;
273:                }
274:
275:                public void setIndex(int index) {
276:                    m_index = index;
277:                    m_index_str = String.valueOf(index);
278:                }
279:
280:                /**
281:                 * @return the preferred size
282:                 */
283:                public Dimension getPreferredSize() {
284:                    FontMetrics fm = getFontMetrics(m_font);
285:                    int line_height = fm.getHeight();
286:                    m_pref_size.setSize(fm.stringWidth(m_index_str) + MARGIN
287:                            * 2, line_height);
288:                    return m_pref_size;
289:                }
290:
291:                /**
292:                 * Paint routine that renders the focus glyphs
293:                 */
294:                public void paintComponent(Graphics g) {
295:                    Color old_c = g.getColor();
296:
297:                    FontMetrics fm = g.getFontMetrics(m_font);
298:                    int line_height = fm.getHeight();
299:                    int y = line_height - fm.getDescent();
300:
301:                    g.setColor(m_background);
302:                    g.fillRect(0, 0, getWidth(), getHeight());
303:                    g.setColor(m_foreground);
304:                    g.drawString(m_index_str, MARGIN, y);
305:                    g.setColor(old_c);
306:                }
307:            }
308:        }
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