Source Code Cross Referenced for MListPeer.java in  » 6.0-JDK-Platform » solaris » sun » awt » motif » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Platform » solaris » sun.awt.motif 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 1995-2004 Sun Microsystems, Inc.  All Rights Reserved.
003:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004:         *
005:         * This code is free software; you can redistribute it and/or modify it
006:         * under the terms of the GNU General Public License version 2 only, as
007:         * published by the Free Software Foundation.  Sun designates this
008:         * particular file as subject to the "Classpath" exception as provided
009:         * by Sun in the LICENSE file that accompanied this code.
010:         *
011:         * This code is distributed in the hope that it will be useful, but WITHOUT
012:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013:         * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
014:         * version 2 for more details (a copy is included in the LICENSE file that
015:         * accompanied this code).
016:         *
017:         * You should have received a copy of the GNU General Public License version
018:         * 2 along with this work; if not, write to the Free Software Foundation,
019:         * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020:         *
021:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022:         * CA 95054 USA or visit www.sun.com if you need additional information or
023:         * have any questions.
024:         */
025:        package sun.awt.motif;
026:
027:        import java.awt.*;
028:        import java.awt.peer.*;
029:        import java.awt.event.ActionEvent;
030:        import java.awt.event.ItemEvent;
031:        import java.awt.event.MouseEvent;
032:        import java.awt.event.MouseWheelEvent;
033:
034:        class MListPeer extends MComponentPeer implements  ListPeer {
035:            native void create(MComponentPeer parent);
036:
037:            void initialize() {
038:                List li = (List) target;
039:
040:                /* add any items that were already inserted in the target. */
041:                int nitems = li.countItems();
042:                for (int i = 0; i < nitems; i++) {
043:                    addItem(li.getItem(i), -1);
044:                }
045:
046:                /* set whether this list should allow multiple selections. */
047:                setMultipleSelections(li.allowsMultipleSelections());
048:
049:                /* make the visible position visible. */
050:                int index = li.getVisibleIndex();
051:                if (index >= 0) {
052:                    makeVisible(index);
053:                }
054:
055:                /* select the item if necessary. */
056:                int sel[] = li.getSelectedIndexes();
057:                for (int i = 0; i < sel.length; i++) {
058:                    select(sel[i]);
059:                }
060:
061:                /* BugID 4060345 to avoid showing scrollbar in empty List */
062:                if (nitems == 0) {
063:                    addItem(" ", 0);
064:                    delItems(0, 0);
065:                }
066:                super .pSetScrollbarBackground(getParent_NoClientCode(li)
067:                        .getBackground());
068:
069:                if (!target.isBackgroundSet()) {
070:                    target.setBackground(SystemColor.text);
071:                }
072:                if (!target.isForegroundSet()) {
073:                    target.setForeground(SystemColor.textText);
074:                }
075:
076:                super .initialize();
077:            }
078:
079:            MListPeer(List target) {
080:                super (target);
081:            }
082:
083:            /* New method name for 1.1 */
084:            public void add(String item, int index) {
085:                addItem(item, index);
086:            }
087:
088:            /* New method name for 1.1 */
089:            public void removeAll() {
090:                clear();
091:            }
092:
093:            /* New method name for 1.1 */
094:            public void setMultipleMode(boolean b) {
095:                setMultipleSelections(b);
096:            }
097:
098:            /* New method name for 1.1 */
099:            public Dimension getPreferredSize(int rows) {
100:                return preferredSize(rows);
101:            }
102:
103:            /* New method name for 1.1 */
104:            public Dimension getMinimumSize(int rows) {
105:                return minimumSize(rows);
106:            }
107:
108:            public void setForeground(Color c) {
109:                pSetInnerForeground(c);
110:            }
111:
112:            public native void setBackground(Color c);
113:
114:            public native void setMultipleSelections(boolean v);
115:
116:            public native boolean isSelected(int index);
117:
118:            public native void addItem(String item, int index);
119:
120:            public native void delItems(int start, int end);
121:
122:            public native void select(int index);
123:
124:            public native void deselect(int index);
125:
126:            public native void makeVisible(int index);
127:
128:            public void clear() {
129:                List l = (List) target;
130:                int count = l.countItems();
131:                if (count > 0) {
132:                    delItems(0, count - 1);
133:                }
134:            }
135:
136:            public int[] getSelectedIndexes() {
137:                List l = (List) target;
138:                int len = l.countItems();
139:                int sel[] = new int[len];
140:                int nsel = 0;
141:                for (int i = 0; i < len; i++) {
142:                    if (isSelected(i)) {
143:                        sel[nsel++] = i;
144:                    }
145:                }
146:                int selected[] = new int[nsel];
147:                System.arraycopy(sel, 0, selected, 0, nsel);
148:                return selected;
149:            }
150:
151:            // NOTE: This method may be called by privileged threads.
152:            //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!
153:            public void action(int index, final long when, final int modifiers) {
154:                final List list = (List) target;
155:                final int selectIndex = index;
156:
157:                MToolkit.executeOnEventHandlerThread(list, new Runnable() {
158:                    public void run() {
159:                        list.select(selectIndex);
160:                        postEvent(new ActionEvent(target,
161:                                ActionEvent.ACTION_PERFORMED, list
162:                                        .getItem(selectIndex), when, modifiers));
163:                    }
164:                });
165:            } // action()
166:
167:            // NOTE: This method may be called by privileged threads.
168:            //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!
169:            public void handleListChanged(int index) {
170:                final MListPeer listPeer = this ;
171:                final List list = (List) target;
172:                final int listIndex = index;
173:
174:                MToolkit.executeOnEventHandlerThread(list, new Runnable() {
175:                    public void run() {
176:                        int selected[] = listPeer.getSelectedIndexes();
177:                        boolean isSelected = false;
178:
179:                        for (int i = 0; i < selected.length; i++) {
180:                            if (listIndex == selected[i]) {
181:                                isSelected = true;
182:                                break;
183:                            }
184:                        }
185:                        postEvent(new ItemEvent(list,
186:                                ItemEvent.ITEM_STATE_CHANGED, Integer
187:                                        .valueOf(listIndex),
188:                                isSelected ? ItemEvent.SELECTED
189:                                        : ItemEvent.DESELECTED));
190:
191:                    }
192:                });
193:            } // handleListChanged()
194:
195:            public Dimension minimumSize() {
196:                return minimumSize(4);
197:            }
198:
199:            public Dimension preferredSize(int v) {
200:                return minimumSize(v);
201:            }
202:
203:            public Dimension minimumSize(int v) {
204:                FontMetrics fm = getFontMetrics(((List) target).getFont());
205:                return new Dimension(SCROLLBAR + 2 * MARGIN
206:                        + fm.stringWidth("0123456789abcde"),
207:                        ((fm.getHeight() + 2 * SPACE) * v) + 2 * MARGIN);
208:            }
209:
210:            public boolean isFocusable() {
211:                return true;
212:            }
213:
214:            /*
215:             * Print the native component by rendering the Motif look ourselves.
216:             * ToDo(aim): needs to query native motif for more accurate size and
217:             * color information, selected items, and item offset.
218:             */
219:            final static int MARGIN = 2;
220:            final static int SPACE = 1;
221:            final static int SCROLLBAR = 16;
222:            int fontHeight;
223:            int fontAscent;
224:            int fontLeading;
225:            int vval;
226:            int hval;
227:            int vmax;
228:            int hmax;
229:
230:            public void print(Graphics g) {
231:                List l = (List) target;
232:                Dimension d = l.size();
233:                Color bg = l.getBackground();
234:                Color fg = l.getForeground();
235:                int numItems = l.getItemCount();
236:                FontMetrics fm = getFontMetrics(l.getFont());
237:                int w, h;
238:                int vvis, hvis, vmin, hmin;
239:                int max = 0;
240:
241:                for (int i = 0; i < numItems; i++) {
242:                    int len = fm.stringWidth(l.getItem(i));
243:                    max = Math.max(max, len);
244:                }
245:
246:                fontHeight = fm.getHeight();
247:                fontAscent = fm.getAscent();
248:                fontLeading = fm.getLeading();
249:
250:                hmin = vmin = 0;
251:
252:                vvis = itemsInWindow(true);
253:                vmax = Math.max(numItems - vvis, 0);
254:                h = d.height - SCROLLBAR;
255:
256:                if (vmax != 0) {
257:                    w = d.width - SCROLLBAR;
258:                    hvis = w - ((2 * SPACE) + (2 * MARGIN));
259:                    hmax = Math.max(max - hvis, 0);
260:                } else {
261:                    w = d.width;
262:                    hvis = w - ((2 * SPACE) + (2 * MARGIN));
263:                    hmax = Math.max(max - hvis, 0);
264:                }
265:                if (hmax == 0) {
266:                    h = d.height;
267:                    vvis = itemsInWindow(false);
268:                    vmax = Math.max(numItems - vvis, 0);
269:                }
270:                if (vmax == 0) {
271:                    w = d.width;
272:                    hvis = w - ((2 * SPACE) + (2 * MARGIN));
273:                    hmax = Math.max(max - hvis, 0);
274:                }
275:
276:                hval = 0;
277:                vval = 0;
278:                /*
279:                System.out.println("print List: "+d.width+"x"+d.height+" numItems="+numItems+
280:                "max="+max+" vsb=("+vmin+".."+vmax+","+vval+","+vvis+
281:                ") hsb=("+hmin+".."+hmax+","+hval+","+hvis+")");
282:                 */
283:
284:                g.setColor(bg);
285:                g.fillRect(0, 0, w, h);
286:
287:                if (hmax != 0) {
288:                    int sbw = d.width - ((vmax == 0) ? 0 : SCROLLBAR);
289:                    g.fillRect(1, d.height - SCROLLBAR - 3, sbw - 1,
290:                            SCROLLBAR - 3);
291:                    Graphics ng = g.create();
292:                    try {
293:                        ng.translate(0, d.height - (SCROLLBAR - 2));
294:                        drawScrollbar(ng, bg, SCROLLBAR - 2, sbw, hmin, hmax,
295:                                hval, hvis, true);
296:                    } finally {
297:                        ng.dispose();
298:                    }
299:                }
300:                if (vmax != 0) {
301:                    int sbh = d.height - ((hmax == 0) ? 0 : SCROLLBAR);
302:                    g.fillRect(d.width - SCROLLBAR - 3, 1, SCROLLBAR - 3,
303:                            sbh - 1);
304:                    Graphics ng = g.create();
305:                    try {
306:                        ng.translate(d.width - (SCROLLBAR - 2), 0);
307:                        drawScrollbar(ng, bg, SCROLLBAR - 2, sbh, vmin, vmax,
308:                                vval, vvis, false);
309:                    } finally {
310:                        ng.dispose();
311:                    }
312:                }
313:
314:                draw3DRect(g, bg, 0, 0, w - 1, h - 1, false);
315:
316:                if (numItems > 0) {
317:                    int n = itemsInWindow(hmax != 0);
318:                    int e = Math.min(numItems - 1, (vval + n) - 1);
319:                    paintItems(g, bg, fg, vval, e);
320:                }
321:
322:                target.print(g);
323:            }
324:
325:            int itemsInWindow(boolean scrollbarVisible) {
326:                Dimension d = target.size();
327:                int h;
328:                if (scrollbarVisible) {
329:                    h = d.height - ((2 * MARGIN) + SCROLLBAR);
330:                } else {
331:                    h = d.height - 2 * MARGIN;
332:                }
333:                int i = fontHeight - fontLeading;
334:                return h / (i + (2 * SPACE));
335:            }
336:
337:            void paintItem(Graphics g, Color bg, Color fg, int index,
338:                    boolean isSelected) {
339:                List l = (List) target;
340:                Dimension d = l.size();
341:                int numItems = l.getItemCount();
342:                Color shadow = bg.darker();
343:
344:                if ((index < vval)
345:                        || (index >= (vval + itemsInWindow(hmax != 0)))) {
346:                    return;
347:                }
348:                int w = d.width
349:                        - ((2 * MARGIN) + ((vmax != 0) ? SCROLLBAR : 0));
350:                int h = (fontHeight - fontLeading);
351:                int htotal = h + (2 * SPACE);
352:                int index2y = MARGIN + (index * htotal) + SPACE;
353:                int y = index2y - (vval * htotal);
354:                int x = MARGIN + SPACE;
355:                Graphics ng = g.create();
356:                try {
357:                    if (index > numItems - 1) {
358:                        ng.setColor(bg);
359:                        ng.fillRect(x - 2, y - 2, w, h + 4);
360:                        return;
361:                    }
362:                    if (isSelected) {
363:                        ng.setColor(shadow);
364:                        ng.fillRect(x - 1, y - 1, w - 2, h + 2);
365:                    } else {
366:                        ng.setColor(bg);
367:                        ng.fillRect(x - 1, y - 1, w - 2, h + 2);
368:                    }
369:                    ng.setColor(bg);
370:
371:                    ng.drawRect(x - 2, y - 2, w - 1, h + 3);
372:                    ng.setColor(fg);
373:                    String str = (String) l.getItem(index);
374:                    ng.clipRect(x, y, w - (2 * SPACE), h);
375:                    ng.drawString(str, x - hval, y + fontAscent);
376:                } finally {
377:                    ng.dispose();
378:                }
379:            }
380:
381:            void paintItems(Graphics g, Color bg, Color fg, int s, int e) {
382:                for (int i = s; i <= e; i++) {
383:                    paintItem(g, bg, fg, i, false);
384:                }
385:            }
386:
387:            public boolean handlesWheelScrolling() {
388:                return true;
389:            }
390:
391:            public void handleEvent(AWTEvent e) {
392:                if (e.getID() == MouseEvent.MOUSE_WHEEL) {
393:                    MouseWheelEvent mwe = (MouseWheelEvent) e;
394:                    nativeHandleMouseWheel(mwe.getScrollType(), mwe
395:                            .getScrollAmount(), mwe.getWheelRotation());
396:                } else {
397:                    super .handleEvent(e);
398:                }
399:            }
400:
401:            native void nativeHandleMouseWheel(int scrollType,
402:                    int scrollAmount, int wheelRotation);
403:        }
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