Source Code Cross Referenced for Listitem.java in  » Ajax » zk » org » zkoss » zul » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Ajax » zk » org.zkoss.zul 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* Listitem.java
002:
003:        {{IS_NOTE
004:        	Purpose:
005:        		
006:        	Description:
007:        		
008:        	History:
009:        		Wed Jun 15 17:38:52     2005, Created by tomyeh
010:        }}IS_NOTE
011:
012:        Copyright (C) 2005 Potix Corporation. All Rights Reserved.
013:
014:        {{IS_RIGHT
015:        	This program is distributed under GPL Version 2.0 in the hope that
016:        	it will be useful, but WITHOUT ANY WARRANTY.
017:        }}IS_RIGHT
018:         */
019:        package org.zkoss.zul;
020:
021:        import java.util.Iterator;
022:        import java.util.List;
023:        import java.util.ArrayList;
024:
025:        import org.zkoss.lang.Objects;
026:        import org.zkoss.util.logging.Log;
027:        import org.zkoss.xml.HTMLs;
028:
029:        import org.zkoss.zk.ui.Component;
030:        import org.zkoss.zk.ui.UiException;
031:
032:        import org.zkoss.zul.impl.XulElement;
033:
034:        /**
035:         * A list item.
036:         *
037:         * <p>Default {@link #getSclass}: item.
038:         *
039:         * @author tomyeh
040:         */
041:        public class Listitem extends XulElement {
042:            private static final Log log = Log.lookup(Listitem.class);
043:
044:            private Object _value;
045:            /** The index in the parent (only for implementation purpose). */
046:            private int _index = -1; //no parent at begining
047:            private boolean _selected, _disabled;
048:            /** whether the content of this item is loaded; used if
049:             * the listbox owning this item is using a list model.
050:             */
051:            private boolean _loaded;
052:
053:            public Listitem() {
054:            }
055:
056:            public Listitem(String label) {
057:                setLabel(label);
058:            }
059:
060:            public Listitem(String label, Object value) {
061:                setLabel(label);
062:                setValue(value);
063:            }
064:
065:            /** Returns the list box that it belongs to.
066:             * <p>It is the same as {@link #getParent}.
067:             */
068:            public Listbox getListbox() {
069:                return (Listbox) getParent();
070:            }
071:
072:            /** Returns whether the HTML's select tag is used.
073:             */
074:            private final boolean inSelectMold() {
075:                final Listbox listbox = getListbox();
076:                return listbox != null && listbox.inSelectMold();
077:            }
078:
079:            protected String getRealSclass() {
080:                final String sclx = (String) getListbox().getAttribute(
081:                        Attributes.STRIPE_STATE);
082:                return super .getRealSclass() + (sclx != null ? " " + sclx : "");
083:            }
084:
085:            /** Returns the maximal length of each item's label.
086:             * It is a shortcut of getParent().getMaxlength();
087:             * Thus, it works only if the listbox's mold is "select".
088:             */
089:            public int getMaxlength() {
090:                final Listbox listbox = getListbox();
091:                return listbox != null ? listbox.getMaxlength() : 0;
092:            }
093:
094:            /** Returns the value.
095:             * <p>Default: null.
096:             * <p>Note: the value is application dependent, you can place
097:             * whatever value you want.
098:             * <p>If you are using listitem with HTML Form (and with
099:             * the name attribute), it is better to specify a String-typed
100:             * value.
101:             */
102:            public Object getValue() {
103:                return _value;
104:            }
105:
106:            /** Sets the value.
107:             * @param value the value.
108:             * <p>Note: the value is application dependent, you can place
109:             * whatever value you want.
110:             * <p>If you are using listitem with HTML Form (and with
111:             * the name attribute), it is better to specify a String-typed
112:             * value.
113:             */
114:            public void setValue(Object value) {
115:                if (!Objects.equals(_value, value)) {
116:                    _value = value;
117:
118:                    final Listbox listbox = getListbox();
119:                    if (listbox != null)
120:                        if (listbox.inSelectMold())
121:                            smartUpdate("value", Objects.toString(_value));
122:                        else if (listbox.getName() != null)
123:                            smartUpdate("z.value", Objects.toString(_value));
124:                }
125:            }
126:
127:            /** Returns whether it is disabled.
128:             * <p>Default: false.
129:             */
130:            public final boolean isDisabled() {
131:                return _disabled;
132:            }
133:
134:            /** Sets whether it is disabled.
135:             */
136:            public void setDisabled(boolean disabled) {
137:                if (_disabled != disabled) {
138:                    _disabled = disabled;
139:                    if (inSelectMold())
140:                        smartUpdate("disabled", _disabled);
141:                    else
142:                        invalidate();
143:                }
144:            }
145:
146:            /** Returns whether it is selected.
147:             * <p>Default: false.
148:             */
149:            public boolean isSelected() {
150:                return _selected;
151:            }
152:
153:            /** Sets whether it is selected.
154:             */
155:            public void setSelected(boolean selected) {
156:                if (_selected != selected) {
157:                    final Listbox listbox = (Listbox) getParent();
158:                    if (listbox != null) {
159:                        //Note: we don't update it here but let its parent does the job
160:                        listbox.toggleItemSelection(this );
161:                    } else {
162:                        _selected = selected;
163:                    }
164:                }
165:            }
166:
167:            /** Returns the label of the {@link Listcell} it contains, or null
168:             * if no such cell.
169:             */
170:            public String getLabel() {
171:                final Listcell cell = (Listcell) getFirstChild();
172:                return cell != null ? cell.getLabel() : null;
173:            }
174:
175:            /** Sets the label of the {@link Listcell} it contains.
176:             *
177:             * <p>If it is not created, we automatically create it.
178:             */
179:            public void setLabel(String label) {
180:                autoFirstCell().setLabel(label);
181:            }
182:
183:            private Listcell autoFirstCell() {
184:                Listcell cell = (Listcell) getFirstChild();
185:                if (cell == null) {
186:                    cell = new Listcell();
187:                    cell.applyProperties();
188:                    cell.setParent(this );
189:                }
190:                return cell;
191:            }
192:
193:            /** Returns the src of the {@link Listcell} it contains, or null
194:             * if no such cell.
195:             */
196:            public String getSrc() {
197:                final Listcell cell = (Listcell) getFirstChild();
198:                return cell != null ? cell.getSrc() : null;
199:            }
200:
201:            /** Sets the src of the {@link Listcell} it contains.
202:             *
203:             * <p>If it is not created, we automatically create it.
204:             *
205:             * <p>The same as {@link #setImage}.
206:             */
207:            public void setSrc(String src) {
208:                autoFirstCell().setSrc(src);
209:            }
210:
211:            /** Returns the image of the {@link Listcell} it contains.
212:             *
213:             * <p>The same as {@link #getImage}.
214:             */
215:            public String getImage() {
216:                return getSrc();
217:            }
218:
219:            /** Sets the image of the {@link Listcell} it contains.
220:             *
221:             * <p>If it is not created, we automatically create it.
222:             *
223:             * <p>The same as {@link #setSrc}.
224:             */
225:            public void setImage(String image) {
226:                setSrc(image);
227:            }
228:
229:            /** Returns the index of this item (aka., the order in the listbox).
230:             */
231:            public final int getIndex() {
232:                return _index;
233:            }
234:
235:            /** Sets whether the content of this item is loaded; used if
236:             * the listbox owning this item is using a list model.
237:             */
238:            /*package*/final void setLoaded(boolean loaded) {
239:                if (loaded != _loaded) {
240:                    _loaded = loaded;
241:
242:                    final Listbox listbox = getListbox();
243:                    if (listbox != null && listbox.getModel() != null)
244:                        if (_loaded && !listbox.inPagingMold())
245:                            invalidate();
246:                        //reason: the client doesn't init (for better performance)
247:                        //i.e., z.skipsib is specified for unloaded items
248:                        else
249:                            smartUpdate("z.loaded", _loaded);
250:                }
251:            }
252:
253:            /** Returns whether the content of this item is loaded.
254:             * It is meaningful only if {@link #getListbox} is live data,
255:             * i.e., {@link Listbox#getModel} is not null.
256:             *
257:             * @since 2.4.0
258:             */
259:            public boolean isLoaded() {
260:                return _loaded;
261:            }
262:
263:            //-- Utilities for implementation only (called by Listbox) */
264:            /*package*/final void setIndexDirectly(int index) {
265:                _index = index;
266:            }
267:
268:            /*package*/final void setSelectedDirectly(boolean selected) {
269:                _selected = selected;
270:            }
271:
272:            //-- super --//
273:            /** Returns the style class.
274:             * Note: 1) if not set (or setSclass(null), "item" is assumed;
275:             * 2) if selected, it appends " seld" to super's getSclass().
276:             */
277:            public String getSclass() {
278:                String scls = super .getSclass();
279:                if (scls == null)
280:                    scls = "item";
281:                if (isDisabled())
282:                    return scls.length() > 0 ? scls + " disd" : "disd";
283:                else if (isSelected())
284:                    return scls.length() > 0 ? scls + " seld" : "seld";
285:                return scls;
286:            }
287:
288:            //-- Component --//
289:            public void setParent(Component parent) {
290:                if (parent != null && !(parent instanceof  Listbox))
291:                    throw new UiException(
292:                            "Listitem's parent must be Listbox, not " + parent);
293:                super .setParent(parent);
294:            }
295:
296:            public boolean insertBefore(Component child, Component insertBefore) {
297:                if (!(child instanceof  Listcell))
298:                    throw new UiException("Unsupported child for listitem: "
299:                            + child);
300:                return super .insertBefore(child, insertBefore);
301:            }
302:
303:            public void invalidate() {
304:                if (inSelectMold()) {
305:                    //Both IE and Mozilla are buggy if we update options by outerHTML
306:                    getParent().invalidate();
307:                    return;
308:                }
309:                super .invalidate();
310:            }
311:
312:            public void onChildAdded(Component child) {
313:                if (inSelectMold())
314:                    invalidate(); //if HTML-select, Listcell has no client part
315:                super .onChildAdded(child);
316:            }
317:
318:            public void onChildRemoved(Component child) {
319:                if (inSelectMold())
320:                    invalidate(); //if HTML-select, Listcell has no client part
321:                super .onChildRemoved(child);
322:            }
323:
324:            public String getOuterAttrs() {
325:                final StringBuffer sb = new StringBuffer(80).append(super 
326:                        .getOuterAttrs());
327:
328:                if (inSelectMold()) {
329:                    HTMLs
330:                            .appendAttribute(sb, "value", Objects
331:                                    .toString(_value));
332:                    if (isDisabled())
333:                        HTMLs.appendAttribute(sb, "disabled", "disabled");
334:                    if (isSelected())
335:                        HTMLs.appendAttribute(sb, "selected", "selected");
336:                } else {
337:                    final Listbox listbox = getListbox();
338:                    if (listbox != null) {
339:                        if (listbox.getName() != null)
340:                            HTMLs.appendAttribute(sb, "z.value", Objects
341:                                    .toString(_value));
342:                        if (listbox.getModel() != null)
343:                            HTMLs.appendAttribute(sb, "z.loaded", _loaded);
344:                    }
345:                    HTMLs.appendAttribute(sb, "z.disd", isDisabled());
346:                    if (getAttribute(Attributes.SKIP_SIBLING) != null) {
347:                        HTMLs.appendAttribute(sb, "z.skipsib", "true");
348:                        removeAttribute(Attributes.SKIP_SIBLING);
349:                    }
350:                    if (isSelected())
351:                        HTMLs.appendAttribute(sb, "z.sel", "true");
352:
353:                    final String clkattrs = getAllOnClickAttrs(false);
354:                    if (clkattrs != null)
355:                        sb.append(clkattrs);
356:                    HTMLs.appendAttribute(sb, "z.rid", getListbox().getUuid());
357:                }
358:                return sb.toString();
359:            }
360:
361:            //Clone//
362:            public Object clone() {
363:                final Listitem clone = (Listitem) super .clone();
364:                clone._index = -1;
365:                //note: we have to reset, since listbox.insertBefore assumes
366:                //that a parent-less listitem's index is -1
367:                return clone;
368:            }
369:        }
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