Source Code Cross Referenced for ToolItem.java in  » Ajax » MyGWT » net » mygwt » ui » client » widget » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Ajax » MyGWT » net.mygwt.ui.client.widget 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*******************************************************************************
002:         * Copyright (c) 2000, 2007 IBM Corporation and others.
003:         * All rights reserved. This program and the accompanying materials
004:         * are made available under the terms of the Eclipse Public License v1.0
005:         * which accompanies this distribution, and is available at
006:         * http://www.eclipse.org/legal/epl-v10.html
007:         *
008:         * Contributors:
009:         *     IBM Corporation - initial API and implementation
010:         *     Darrell Meyer <darrell@mygwt.net> - derived implementation
011:         *******************************************************************************/package net.mygwt.ui.client.widget;
012:
013:        import net.mygwt.ui.client.Events;
014:        import net.mygwt.ui.client.Style;
015:        import net.mygwt.ui.client.MyDOM;
016:        import net.mygwt.ui.client.event.BaseEvent;
017:        import net.mygwt.ui.client.event.Listener;
018:        import net.mygwt.ui.client.event.SelectionListener;
019:        import net.mygwt.ui.client.event.TypedListener;
020:        import net.mygwt.ui.client.widget.menu.Menu;
021:
022:        import com.google.gwt.user.client.Command;
023:        import com.google.gwt.user.client.DOM;
024:        import com.google.gwt.user.client.DeferredCommand;
025:        import com.google.gwt.user.client.Element;
026:        import com.google.gwt.user.client.Event;
027:
028:        /**
029:         * A selectable item in a <code>ToolBar</code>.
030:         * 
031:         * <dl>
032:         * <dt><b>Styles:</b></dt>
033:         * <dd>PUSH, TOGGLE, MENU, SPLIT_MENU, SEPERATOR</dd>
034:         * 
035:         * <dt><b>Events:</b></dt>
036:         * 
037:         * <dd><b>Select</b> : (widget)<br>
038:         * <div>Fires after the item is selected.</div>
039:         * <ul>
040:         * <li>widget : this</li>
041:         * </ul>
042:         * </dd>
043:         * 
044:         * <dt><b>CSS:</b></dt>
045:         * <dd>my-toolitem (the tool item)</dd>
046:         * <dd>my-toolitem-text (the tool item text)</dd>
047:         * </dl>
048:         * 
049:         * <p>
050:         * Note: Only one of the styles PUSH, TOGGLE, MENU and SPLIT_MENU may be
051:         * specified.
052:         * </p>
053:         */
054:        public class ToolItem extends Item {
055:
056:            ToolBar toolBar;
057:            Menu menu;
058:            private Listener menuListener;
059:            private int style;
060:
061:            /**
062:             * Creates a new PUSH toolitem.
063:             */
064:            public ToolItem() {
065:                this (Style.PUSH);
066:            }
067:
068:            /**
069:             * Creates a new tool item.
070:             * 
071:             * @param style the item's style information
072:             */
073:            public ToolItem(int style) {
074:                super ("my-toolitem");
075:                this .style = style;
076:                setDisabledStyle("my-toolitem-disabled");
077:            }
078:
079:            /**
080:             * Adds a listener interface to receive selection events.
081:             * 
082:             * @param listener the listener to add
083:             */
084:            public void addSelectionListener(SelectionListener listener) {
085:                TypedListener tl = new TypedListener(listener);
086:                addListener(Events.Select, tl);
087:            }
088:
089:            /**
090:             * Returns the item's menu.
091:             * 
092:             * @return the menu
093:             */
094:            public Menu getMenu() {
095:                return menu;
096:            }
097:
098:            /**
099:             * Returns the item's parent tool bar.
100:             * 
101:             * @return the toolbar
102:             */
103:            public ToolBar getToolBar() {
104:                return toolBar;
105:            }
106:
107:            /**
108:             * Returns <code>true</code> if the item is selected.
109:             * 
110:             * @return the selected state
111:             */
112:            public boolean isSelected() {
113:                return super .isSelected();
114:            }
115:
116:            /**
117:             * Removes a previously added listener.
118:             * 
119:             * @param listener the listener to be removed
120:             */
121:            public void removeSelectionListener(SelectionListener listener) {
122:                unhook(Events.EffectStart, listener);
123:            }
124:
125:            public void setIconStyle(String style) {
126:                super .setIconStyle(style);
127:                if (rendered) {
128:                    MyDOM.setVisible(midleftElem, true);
129:                }
130:            }
131:
132:            /**
133:             * Sets the item's menu.
134:             * 
135:             * <p>
136:             * Only applicable when item is of type <code>MENU</code> or
137:             * <code>SPLIT_MENU</code>.
138:             * </p>
139:             * 
140:             * @param menu the menu for the drop down
141:             */
142:            public void setMenu(Menu menu) {
143:                this .menu = menu;
144:            }
145:
146:            /**
147:             * Sets the item's selected state.
148:             * 
149:             * @param selected the select state
150:             */
151:            public void setSelected(boolean selected) {
152:                super .setSelected(selected);
153:            }
154:
155:            /**
156:             * Sets the item's style. Has no effect if called after the item has been rendered.
157:             * @param style the style
158:             */
159:            public void setStyle(int style) {
160:                if (!isRendered()) {
161:                    this .style = style;
162:                }
163:            }
164:
165:            /**
166:             * Sets the item's text.
167:             * 
168:             * @param text the text
169:             */
170:            public void setText(String text) {
171:                super .setText(text);
172:                if (rendered) {
173:                    MyDOM.setVisible(centerElem, true);
174:                }
175:            }
176:
177:            protected void onClick(BaseEvent be) {
178:                super .onClick(be);
179:                be.stopEvent();
180:                switch (style) {
181:                case Style.TOGGLE:
182:                    setSelected(!isSelected(), false);
183:                    break;
184:                case Style.MENU:
185:                    onMenuClick(be.event);
186:                    break;
187:                case Style.SPLIT_MENU:
188:                    onSplitMenuClick(be.event);
189:                    break;
190:                default:
191:                    fireEvent(Events.Select);
192:                    break;
193:                }
194:            }
195:
196:            protected void onHideMenu() {
197:                setSelected(false);
198:                menu.removeListener(Events.Close, menuListener);
199:                menu.hide();
200:            }
201:
202:            protected void onMenuClick(Event event) {
203:                if (menu == null) {
204:                    return;
205:                }
206:                if (isSelected()) {
207:                    setSelected(false);
208:                    onHideMenu();
209:                } else {
210:                    setSelected(true);
211:                    onShowMenu();
212:                }
213:            }
214:
215:            protected void onMouseOut(BaseEvent be) {
216:                super .onMouseOut(be);
217:                if (style == Style.SPLIT_MENU) {
218:                    MyDOM
219:                            .setStyleName(midRightElem, "my-toolitem-split",
220:                                    false);
221:                }
222:            }
223:
224:            protected void onMouseOver(BaseEvent be) {
225:                super .onMouseOver(be);
226:                if (style == Style.SPLIT_MENU) {
227:                    MyDOM.setStyleName(midRightElem, "my-toolitem-split", true);
228:                }
229:            }
230:
231:            protected void onRender() {
232:                super .onRender();
233:
234:                MyDOM.setVisible(centerElem, false);
235:                MyDOM.setVisible(midleftElem, false);
236:                MyDOM.setVisible(midRightElem, false);
237:
238:                if (getText() != null) {
239:                    MyDOM.setVisible(centerElem, true);
240:                }
241:
242:                if (iconStyle != null) {
243:                    MyDOM.setVisible(midleftElem, true);
244:                }
245:
246:                switch (style) {
247:                case Style.SEPARATOR:
248:                    Element div = DOM.createDiv();
249:                    MyDOM.setStyleName(div, "my-toolitem-seperator");
250:                    setElement(div);
251:                    break;
252:                case Style.MENU:
253:                case Style.SPLIT_MENU:
254:                    MyDOM.setVisible(midRightElem, true);
255:                    Element d = DOM.createDiv();
256:                    MyDOM.setStyleName(d, "my-toolitem-split");
257:                    DOM.appendChild(midRightElem, d);
258:                    break;
259:                }
260:
261:                menuListener = new Listener() {
262:                    public void handleEvent(BaseEvent be) {
263:                        onHideMenu();
264:                    }
265:                };
266:            }
267:
268:            protected void onShowMenu() {
269:                addStyleName(baseStyle + "-sel");
270:                final ToolItem fItem = this ;
271:                DeferredCommand.addCommand(new Command() {
272:                    public void execute() {
273:                        menu.show(fItem);
274:                        menu.addListener(Events.Close, menuListener);
275:                    }
276:                });
277:
278:            }
279:
280:            protected void onSplitMenuClick(Event event) {
281:                Element target = DOM.eventGetTarget(event);
282:                Element right = DOM.getNextSibling(midRightElem);
283:                if (DOM.isOrHasChild(midRightElem, target)
284:                        || DOM.isOrHasChild(right, target)) {
285:                    onMenuClick(event);
286:                } else {
287:                    fireEvent(Events.Select);
288:                }
289:            }
290:
291:            private void setSelected(boolean selected, boolean supressEvents) {
292:                super.setSelected(selected);
293:                if (!supressEvents) {
294:                    fireEvent(Events.Select);
295:                }
296:            }
297:
298:        }
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