Source Code Cross Referenced for IconViewUI.java in  » XML-UI » xmlgui » org » beryl » gui » swing » plaf » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML UI » xmlgui » org.beryl.gui.swing.plaf 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Beryl - A web platform based on XML, XSLT and Java
003:         * This file is part of the Beryl XML GUI
004:         *
005:         * Copyright (C) 2004 Wenzel Jakob <wazlaf@tigris.org>
006:         *
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU Lesser General Public
009:         * License as published by the Free Software Foundation; either
010:         * version 2.1 of the License, or (at your option) any later version.
011:
012:         * This program is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this program; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-3107  USA
020:         */
021:
022:        package org.beryl.gui.swing.plaf;
023:
024:        import java.awt.BasicStroke;
025:        import java.awt.Color;
026:        import java.awt.Cursor;
027:        import java.awt.Dimension;
028:        import java.awt.FontMetrics;
029:        import java.awt.Graphics;
030:        import java.awt.Graphics2D;
031:        import java.awt.IllegalComponentStateException;
032:        import java.awt.Insets;
033:        import java.awt.Rectangle;
034:        import java.awt.event.ActionEvent;
035:        import java.awt.event.FocusEvent;
036:        import java.awt.event.FocusListener;
037:        import java.awt.event.KeyEvent;
038:        import java.awt.event.MouseEvent;
039:        import java.awt.event.MouseMotionAdapter;
040:        import java.awt.event.MouseMotionListener;
041:        import java.awt.geom.Rectangle2D;
042:        import java.beans.PropertyChangeEvent;
043:        import java.beans.PropertyChangeListener;
044:
045:        import javax.swing.AbstractAction;
046:        import javax.swing.ImageIcon;
047:        import javax.swing.JComponent;
048:        import javax.swing.JViewport;
049:        import javax.swing.KeyStroke;
050:        import javax.swing.ListModel;
051:        import javax.swing.SwingUtilities;
052:        import javax.swing.event.ListDataEvent;
053:        import javax.swing.event.ListDataListener;
054:        import javax.swing.event.ListSelectionEvent;
055:        import javax.swing.event.ListSelectionListener;
056:        import javax.swing.event.MouseInputAdapter;
057:        import javax.swing.event.MouseInputListener;
058:        import javax.swing.plaf.ComponentUI;
059:        import javax.swing.plaf.metal.MetalLookAndFeel;
060:
061:        import org.beryl.gui.swing.IconElement;
062:        import org.beryl.gui.swing.JIconView;
063:
064:        /**
065:         * JIconView - A simple Java icon view widget
066:         * Portable look and feel implementation
067:         * @version 2.0
068:         * @author Wenzel Jakob
069:         */
070:
071:        public class IconViewUI extends ComponentUI {
072:            private static final int UP = 1;
073:            private static final int DOWN = 2;
074:            private static final int LEFT = 3;
075:            private static final int RIGHT = 4;
076:            private JIconView view = null;
077:            private MouseInputListener mouseListener = null;
078:            private MouseMotionListener motionListener = null;
079:            private FocusListener focusListener = null;
080:            private ListSelectionListener selectionListener = null;
081:            private ListDataListener dataListener = null;
082:            private PropertyChangeListener changeListener = null;
083:            private int oldIndex = -1, textHeight = 0;
084:            private FontMetrics metrics = null;
085:
086:            private class DirectionAction extends AbstractAction {
087:                private int direction = -1;
088:
089:                public DirectionAction(int direction, String name) {
090:                    super (name);
091:                    this .direction = direction;
092:                }
093:
094:                public void actionPerformed(ActionEvent evt) {
095:                    int xcols = view.getSize().width / view.getXCellSize();
096:
097:                    if (direction == RIGHT) {
098:                        view.setSelectedIndex(view.getSelectedIndex() + 1);
099:                    } else if (direction == LEFT) {
100:                        if (view.getSelectedIndex() != 0)
101:                            view.setSelectedIndex(view.getSelectedIndex() - 1);
102:                    } else if (direction == UP) {
103:                        if (view.getSelectedIndex() != xcols - 1)
104:                            view.setSelectedIndex(view.getSelectedIndex()
105:                                    - xcols);
106:                    } else if (direction == DOWN) {
107:                        view.setSelectedIndex(view.getSelectedIndex() + xcols);
108:                    }
109:                }
110:            }
111:
112:            /* ========== Handlers ========== */
113:
114:            private class MouseInputHandler extends MouseInputAdapter {
115:                public void mousePressed(MouseEvent e) {
116:                    if (view.getModel() == null
117:                            || !SwingUtilities.isLeftMouseButton(e))
118:                        return;
119:                    if (!view.hasFocus())
120:                        view.requestFocus();
121:
122:                    int index = getIndexForRowColumn(convertYToRow(e.getY()),
123:                            convertXToColumn(e.getX()));
124:                    if (index != -1
125:                            && checkBoundingBox(e.getX(), e.getY(), index))
126:                        view.setSelectedIndex(index);
127:                    else
128:                        view.setSelectedIndex(-1);
129:                }
130:            }
131:
132:            private class MouseMotionHandler extends MouseMotionAdapter {
133:                public void mouseMoved(MouseEvent e) {
134:                    if (view.getModel() == null
135:                            || (!view.getHandCursorEnabled()))
136:                        return;
137:
138:                    int index = getIndexForRowColumn(convertYToRow(e.getY()),
139:                            convertXToColumn(e.getX()));
140:                    if (index != -1
141:                            && checkBoundingBox(e.getX(), e.getY(), index))
142:                        view.setCursor(Cursor
143:                                .getPredefinedCursor(Cursor.HAND_CURSOR));
144:                    else
145:                        view.setCursor(Cursor
146:                                .getPredefinedCursor(Cursor.DEFAULT_CURSOR));
147:                }
148:            }
149:
150:            private class FocusHandler implements  FocusListener {
151:                protected void repaintFocused() {
152:                    int index = view.getSelectedIndex();
153:                    if (index != -1)
154:                        view.repaint(getBounds(index, index));
155:                }
156:
157:                public void focusGained(FocusEvent e) {
158:                    repaintFocused();
159:                }
160:
161:                public void focusLost(FocusEvent e) {
162:                    repaintFocused();
163:                }
164:            }
165:
166:            private class ListSelectionHandler implements  ListSelectionListener {
167:                public void valueChanged(ListSelectionEvent e) {
168:                    int index = view.getSelectedIndex();
169:                    if (oldIndex != -1) {
170:                        view.repaint(getBounds(oldIndex, oldIndex));
171:                    }
172:                    if (index != -1) {
173:                        view.repaint(getBounds(index, index));
174:                    }
175:                    oldIndex = index;
176:                }
177:            }
178:
179:            private class ListDataHandler implements  ListDataListener {
180:                public void intervalAdded(ListDataEvent e) {
181:                    contentsChanged(e);
182:                }
183:
184:                public void intervalRemoved(ListDataEvent e) {
185:                    contentsChanged(e);
186:                }
187:
188:                public void contentsChanged(ListDataEvent e) {
189:                    int index = view.getSelectedIndex();
190:                    if (index != -1 && view.getModel().getSize() >= index) {
191:                        view.setSelectedIndex(-1);
192:                    }
193:                    view.repaint();
194:                }
195:            };
196:
197:            private class PropertyChangeHandler implements 
198:                    PropertyChangeListener {
199:                public void propertyChange(PropertyChangeEvent event) {
200:                    String name = event.getPropertyName();
201:                    if (name.equals(JIconView.MODEL_PROPERTY)) {
202:                        ListModel model = (ListModel) event.getOldValue();
203:                        if (model != null)
204:                            model.removeListDataListener(dataListener);
205:                        model = (ListModel) event.getNewValue();
206:                        if (model != null) {
207:                            dataListener = new ListDataHandler();
208:                            model.addListDataListener(dataListener);
209:                        }
210:                    } else if (name.equals(JIconView.XCELLSIZE_PROPERTY)
211:                            || name.equals(JIconView.YCELLSIZE_PROPERTY)
212:                            || name.equals(JIconView.ICONTEXTSPACING_PROPERTY)) {
213:                        view.repaint();
214:                    }
215:                }
216:            }
217:
218:            /* ========== UI functions ========== */
219:
220:            public IconViewUI() {
221:                super ();
222:            }
223:
224:            public static ComponentUI createUI(JComponent c) {
225:                return new IconViewUI();
226:            }
227:
228:            public void installUI(JComponent component) {
229:                view = (JIconView) component;
230:                ListModel model = view.getModel();
231:                if (model != null) {
232:                    dataListener = new ListDataHandler();
233:                    model.addListDataListener(dataListener);
234:                }
235:                changeListener = new PropertyChangeHandler();
236:                mouseListener = new MouseInputHandler();
237:                focusListener = new FocusHandler();
238:                selectionListener = new ListSelectionHandler();
239:                motionListener = new MouseMotionHandler();
240:                view.addPropertyChangeListener(changeListener);
241:                view.addMouseListener(mouseListener);
242:                view.addFocusListener(focusListener);
243:                view.addListSelectionListener(selectionListener);
244:                view.addMouseMotionListener(motionListener);
245:                view.getInputMap().put(
246:                        KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0), "UP");
247:                view.getInputMap().put(
248:                        KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0), "DOWN");
249:                view.getInputMap().put(
250:                        KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0), "LEFT");
251:                view.getInputMap().put(
252:                        KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0), "RIGHT");
253:                view.getActionMap().put("UP", new DirectionAction(UP, "UP"));
254:                view.getActionMap().put("DOWN",
255:                        new DirectionAction(DOWN, "DOWN"));
256:                view.getActionMap().put("LEFT",
257:                        new DirectionAction(LEFT, "LEFT"));
258:                view.getActionMap().put("RIGHT",
259:                        new DirectionAction(RIGHT, "RIGHT"));
260:            }
261:
262:            public void uninstallUI(JComponent component) {
263:                if (view != component)
264:                    throw new IllegalComponentStateException(
265:                            "could not uninstall component");
266:                view.removePropertyChangeListener(changeListener);
267:                view.removeFocusListener(focusListener);
268:                view.removeMouseListener(mouseListener);
269:                view.removeListSelectionListener(selectionListener);
270:                view.removeMouseMotionListener(motionListener);
271:                ListModel model = view.getModel();
272:                if (model != null)
273:                    model.removeListDataListener(dataListener);
274:                view.unregisterKeyboardAction(KeyStroke.getKeyStroke(
275:                        KeyEvent.VK_UP, 0));
276:                view.unregisterKeyboardAction(KeyStroke.getKeyStroke(
277:                        KeyEvent.VK_DOWN, 0));
278:                view.unregisterKeyboardAction(KeyStroke.getKeyStroke(
279:                        KeyEvent.VK_LEFT, 0));
280:                view.unregisterKeyboardAction(KeyStroke.getKeyStroke(
281:                        KeyEvent.VK_RIGHT, 0));
282:            }
283:
284:            /* ========== Calculation functions ========== */
285:
286:            private int convertRowToY(int row) {
287:                return view.getYCellSize() * row + view.getInsets().top;
288:            }
289:
290:            private int convertColumnToX(int column) {
291:                return view.getXCellSize() * column + view.getInsets().left;
292:            }
293:
294:            private int getColumns() {
295:                return (int) Math.floor((view.getSize().width
296:                        - view.getInsets().left - view.getInsets().right)
297:                        / (float) view.getXCellSize());
298:            }
299:
300:            private int convertXToColumn(int x) {
301:                return (int) Math.floor((x - view.getInsets().left)
302:                        / (float) view.getXCellSize());
303:            }
304:
305:            private int convertYToRow(int y) {
306:                return (int) Math.floor((y - view.getInsets().top)
307:                        / (float) view.getYCellSize());
308:            }
309:
310:            private int getIndexForRowColumn(int row, int column) {
311:                int xcols = getColumns();
312:                int index = xcols * row + column;
313:                if (column >= xcols || index >= view.getModel().getSize())
314:                    return -1;
315:                return index;
316:            }
317:
318:            private int getIndexForXY(int x, int y) {
319:                return getIndexForRowColumn(convertYToRow(y),
320:                        convertXToColumn(x));
321:            }
322:
323:            private int[] getRowColumnForIndex(int index) {
324:                int value[] = new int[2];
325:                int xcols = getColumns();
326:                value[0] = (int) Math.floor(index / (float) xcols);
327:                value[1] = index - value[0] * xcols;
328:                return value;
329:            }
330:
331:            private Rectangle getBounds(int index1, int index2) {
332:                int rc1[] = getRowColumnForIndex(Math.min(index1, index2));
333:                int rc2[] = getRowColumnForIndex(Math.max(index1, index2));
334:                int y1 = convertRowToY(rc1[0]), y2 = convertRowToY(rc2[0]);
335:                int x1 = convertColumnToX(rc1[1]), x2 = convertColumnToX(rc2[1]);
336:
337:                if (y1 != y2) {
338:                    x1 = view.getInsets().left;
339:                    x2 = view.getSize().width - view.getInsets().right;
340:                }
341:                x2 += view.getXCellSize();
342:                y2 += view.getYCellSize();
343:                return new Rectangle(x1, y1, x2, y2);
344:            }
345:
346:            private boolean checkBoundingBox(int x, int y, int index) {
347:                IconElement icon = (IconElement) view.getModel().getElementAt(
348:                        index);
349:                int xcell = view.getXCellSize(), ycell = view.getYCellSize();
350:                int iconWidth = icon.getIcon().getIconWidth();
351:                int iconHeight = icon.getIcon().getIconHeight();
352:                int spacing = view.getIconTextSpacing();
353:                int stringWidth = metrics.stringWidth(icon.getText());
354:                int center = ycell / 2 - (textHeight + iconHeight + spacing)
355:                        / 2;
356:                x = x % xcell;
357:                y = y % ycell;
358:
359:                if (x > (xcell / 2 - iconWidth / 2)
360:                        && x <= (xcell / 2 + iconWidth / 2) && y > center
361:                        && y <= center + iconHeight + spacing + 1)
362:                    return true;
363:                if (x > ((xcell - stringWidth) / 2)
364:                        && x <= ((xcell + stringWidth) / 2 + 1)
365:                        && y > (iconHeight + spacing + center + 1)
366:                        && y <= textHeight + iconHeight + spacing + center + 3)
367:                    return true;
368:                return false;
369:            }
370:
371:            /* ========== Size functions ========== */
372:
373:            public Dimension getMinimumSize(JComponent component) {
374:                return new Dimension(view.getXCellSize(), view.getYCellSize());
375:            }
376:
377:            public Dimension getPreferredSize(JComponent component) {
378:                /* Relations between width and height are not yet possible in
379:                 * swing, this is a functioning workaround */
380:                Dimension dimension = new Dimension();
381:                Dimension current = view.getSize();
382:                Insets insets = view.getInsets();
383:                if (view.getModel() != null) {
384:                    if (current.width == 0) {
385:                        int length = (int) Math.sqrt(view.getModel().getSize());
386:
387:                        dimension.width = length * view.getXCellSize()
388:                                + insets.left + insets.right;
389:                        dimension.height = length * view.getYCellSize()
390:                                + insets.top + insets.bottom;
391:                    } else {
392:                        int width = view.getSize().width;
393:                        int xcells = (int) Math.floor((float) width
394:                                / (float) view.getXCellSize());
395:                        if (xcells == 0)
396:                            xcells = 1;
397:                        int ycells = (int) Math.ceil((float) view.getModel()
398:                                .getSize()
399:                                / (float) xcells);
400:
401:                        int parentHeight = view.getParent().getSize().height;
402:                        dimension.width = xcells * view.getXCellSize()
403:                                + insets.left + insets.right;
404:                        dimension.height = ycells * view.getYCellSize()
405:                                + insets.top + insets.bottom;
406:                        if (parentHeight > dimension.height)
407:                            dimension.height = parentHeight;
408:                    }
409:                } else {
410:                    return getMinimumSize(component);
411:                }
412:                return dimension;
413:            }
414:
415:            /* ========== Paint ========== */
416:
417:            public void paint(Graphics g, JComponent component) {
418:                if (component != view || view.getModel() == null)
419:                    return;
420:                Graphics2D g2 = (Graphics2D) g;
421:
422:                ListModel model = view.getModel();
423:                Rectangle paintBounds = g.getClipBounds();
424:                Insets insets = view.getInsets();
425:                Dimension size = view.getSize();
426:                int modelSize = model.getSize();
427:                int xcell = view.getXCellSize(), ycell = view.getYCellSize(), counter = 0;
428:                metrics = g.getFontMetrics(view.getFont());
429:
430:                if (metrics == null) {
431:                    throw new RuntimeException("Could not resolve font metrics");
432:                }
433:
434:                textHeight = metrics.getHeight();
435:
436:                /* Fix sizes */
437:                if (paintBounds.x < insets.left)
438:                    paintBounds.x = insets.left;
439:                if (paintBounds.width > size.width - insets.left - insets.right)
440:                    paintBounds.width = size.width - insets.left - insets.right;
441:                if (paintBounds.y < insets.top)
442:                    paintBounds.y = insets.top;
443:                if (view.getParent() instanceof  JViewport) {
444:                    paintBounds.height += 2 * ycell;
445:                    if (paintBounds.height > size.height - insets.top
446:                            - insets.bottom + ycell)
447:                        paintBounds.height = size.height - insets.top
448:                                - insets.bottom + ycell;
449:                } else {
450:                    if (paintBounds.height > size.height - insets.top
451:                            - insets.bottom)
452:                        paintBounds.height = size.height - insets.top
453:                                - insets.bottom;
454:                }
455:
456:                /* Clear background */
457:                g.setColor(view.getBackground());
458:                g.fillRect(paintBounds.x, paintBounds.y, paintBounds.width,
459:                        paintBounds.height);
460:                g.setColor(view.getForeground());
461:
462:                int result[] = new int[(paintBounds.width / xcell)
463:                        * (paintBounds.height / ycell)];
464:                for (int y = paintBounds.y; y < paintBounds.y
465:                        + paintBounds.height; y += ycell) {
466:                    for (int x = paintBounds.x; x <= paintBounds.x
467:                            + paintBounds.width; x += xcell) {
468:                        int index = getIndexForXY(x, y);
469:                        if (index == -1)
470:                            continue;
471:                        int pos[] = getRowColumnForIndex(index);
472:                        int xpos = convertColumnToX(pos[1]);
473:                        int ypos = convertRowToY(pos[0]);
474:                        IconElement element = (IconElement) model
475:                                .getElementAt(index);
476:                        ImageIcon icon = element.getIcon();
477:                        String name = element.getText();
478:                        int stringWidth = metrics.stringWidth(name);
479:                        int iconHeight = icon.getIconHeight();
480:                        int spacing = view.getIconTextSpacing();
481:                        int center = ycell / 2
482:                                - (textHeight + iconHeight + spacing) / 2;
483:
484:                        if (stringWidth > xcell) {
485:                            while (stringWidth > xcell) {
486:                                name = name.substring(0, name.length() - 1);
487:                                stringWidth = metrics.stringWidth(name + "..");
488:                            }
489:                            name += "..";
490:                        }
491:
492:                        g.drawImage(icon.getImage(), xpos
493:                                + (xcell - icon.getIconWidth()) / 2, ypos
494:                                + center, null);
495:                        if (view.getSelectedIndex() == index) {
496:                            if (view.hasFocus()) {
497:                                g2.setColor(Color.darkGray);
498:                                g2.setStroke(new BasicStroke(1.0f,
499:                                        BasicStroke.CAP_BUTT,
500:                                        BasicStroke.JOIN_MITER, 1.0f,
501:                                        new float[] { 1.0f }, 0.0f));
502:                                g2
503:                                        .draw(new Rectangle2D.Double(xpos
504:                                                + (xcell - icon.getIconWidth())
505:                                                / 2 - 1, ypos + center - 2,
506:                                                icon.getIconWidth() + 2,
507:                                                iconHeight + 2));
508:                                g.setColor(MetalLookAndFeel
509:                                        .getTextHighlightColor());
510:                            } else {
511:                                g.setColor(MetalLookAndFeel
512:                                        .getControlDisabled());
513:                            }
514:                            g.fillRect(xpos + (xcell - stringWidth) / 2, ypos
515:                                    + iconHeight + 3 + center, stringWidth + 2,
516:                                    textHeight + 2);
517:                        }
518:                        g.setColor(view.getForeground());
519:                        g.drawString(name, xpos + (xcell - stringWidth) / 2,
520:                                ypos + textHeight + iconHeight + spacing
521:                                        + center);
522:                    }
523:                }
524:            }
525:        }
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