|
1
11 package org.eclipse.pde.internal.ui.editor;
12 import org.eclipse.jface.viewers.IStructuredContentProvider;
13 import org.eclipse.pde.internal.ui.parts.ILinkLabelProvider;
14 import org.eclipse.swt.SWT;
15 import org.eclipse.swt.custom.BusyIndicator;
16 import org.eclipse.swt.events.SelectionAdapter;
17 import org.eclipse.swt.events.SelectionEvent;
18 import org.eclipse.swt.graphics.Image;
19 import org.eclipse.swt.layout.GridData;
20 import org.eclipse.swt.layout.GridLayout;
21 import org.eclipse.swt.widgets.Button;
22 import org.eclipse.swt.widgets.Composite;
23 import org.eclipse.swt.widgets.Control;
24 import org.eclipse.ui.forms.events.HyperlinkEvent;
25 import org.eclipse.ui.forms.events.IHyperlinkListener;
26 import org.eclipse.ui.forms.widgets.FormToolkit;
27 import org.eclipse.ui.forms.widgets.Hyperlink;
28 import org.eclipse.ui.forms.widgets.ImageHyperlink;
29 import org.eclipse.ui.forms.widgets.Section;
30
38 public class LinkSection extends PDESection {
39 private ILinkLabelProvider labelProvider;
40 private IStructuredContentProvider contentProvider;
41 private Composite linkContainer;
42 private Composite container;
43 private Button moreButton;
44 private String  morePageId;
45 private int linkNumberLimit = 20;
46 private LinkHandler linkHandler;
47 class LinkHandler implements IHyperlinkListener {
48 public void linkActivated(HyperlinkEvent e) {
49 doLinkActivated((Hyperlink) e.widget);
50 }
51 public void linkEntered(HyperlinkEvent e) {
52 doEnter((Hyperlink) e.widget);
53 }
54 public void linkExited(HyperlinkEvent e) {
55 doExit((Hyperlink) e.widget);
56 }
57 }
58
63 public LinkSection(PDEFormPage page, Composite parent, int style) {
64 super(page, parent, style);
65 FormToolkit toolkit = page.getManagedForm().getToolkit();
66 linkHandler = new LinkHandler();
67 createClient(getSection(), toolkit);
68 }
69
75 protected void createClient(Section section, FormToolkit toolkit) {
76 container = toolkit.createComposite(section);
77 GridLayout layout = new GridLayout();
78 layout.numColumns = 2;
79 container.setLayout(layout);
80 section.setClient(container);
81 linkContainer = toolkit.createComposite(container);
82 linkContainer.setLayoutData(new GridData(GridData.FILL_BOTH));
83 GridLayout linkLayout = new GridLayout();
84 linkLayout.marginWidth = 0;
85 linkLayout.marginHeight = 0;
86 linkLayout.verticalSpacing = 0;
87 linkContainer.setLayout(linkLayout);
88 }
89 private void createMoreButton() {
90 moreButton = getManagedForm().getToolkit().createButton(container, "More...", SWT.PUSH);
92 moreButton.addSelectionListener(new SelectionAdapter() {
93 public void widgetSelected(SelectionEvent e) {
94 BusyIndicator.showWhile(getSection().getDisplay(),
95 new Runnable () {
96 public void run() {
97 getPage().getEditor().setActivePage(morePageId);
98 }
99 });
100 }
101 });
102 moreButton
103 .setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING));
104 }
105 public void add(Object [] links) {
106 for (int i = 0; i < links.length; i++) {
107 createLink(links[i]);
108 }
109 updateMoreState(linkContainer.getChildren().length > linkNumberLimit);
110 reflow();
111 }
112 public void remove(Object [] links) {
113 for (int i = 0; i < links.length; i++) {
114 disposeLink(links[i]);
115 }
116 updateMoreState(linkContainer.getChildren().length > linkNumberLimit);
117 reflow();
118 }
119 private void disposeLink(Object obj) {
120 Hyperlink link = find(obj);
121 if (link != null)
122 link.dispose();
123 }
124 private Hyperlink find(Object object) {
125 Control[] children = linkContainer.getChildren();
126 for (int i = 0; i < children.length; i++) {
127 Control child = children[i];
128 if (child.getData().equals(object))
129 return (Hyperlink) child;
130 }
131 return null;
132 }
133 public void update(Object [] links) {
134 for (int i = 0; i < links.length; i++) {
135 update(links[i]);
136 }
137 reflow();
138 }
139 private void update(Object object) {
140 Hyperlink link = find(object);
141 if (link != null)
142 update(link, object);
143 }
144 private void update(Hyperlink hyperlink, Object object) {
145 String text = labelProvider != null
146 ? labelProvider.getText(object)
147 : object.toString();
148 Image image = labelProvider != null
149 ? labelProvider.getImage(object)
150 : null;
151 String tooltip = labelProvider != null ? labelProvider
152 .getToolTipText(object) : text;
153 hyperlink.setText(text);
154 hyperlink.setToolTipText(tooltip);
155 if (hyperlink instanceof ImageHyperlink)
156 ((ImageHyperlink) hyperlink).setImage(image);
157 reflow();
158 }
159 public void refresh() {
160 Control[] children = linkContainer.getChildren();
162 for (int i = 0; i < children.length; i++) {
163 children[i].dispose();
164 }
165 createLinks();
166 reflow();
167 }
168 private void reflow() {
169 linkContainer.layout();
170 container.layout();
171 getManagedForm().reflow(true);
172 }
173 private void createLinks() {
174 if (contentProvider == null)
175 return;
176 Object [] objects = contentProvider.getElements(getManagedForm().getInput());
177 for (int i = 0; i < objects.length; i++) {
178 if (i == linkNumberLimit)
179 break;
180 createLink(objects[i]);
181 }
182 if (objects.length > linkNumberLimit)
183 getManagedForm().getToolkit().createLabel(linkContainer, "...", SWT.NULL); updateMoreState(objects.length > linkNumberLimit);
185 }
186 private void updateMoreState(boolean needMore) {
187 if (needMore && moreButton == null) {
188 createMoreButton();
189 }
190 else if (!needMore && moreButton != null) {
191 moreButton.dispose();
192 moreButton = null;
193 }
194 }
195 private void createLink(Object object) {
196 Image image = labelProvider != null
197 ? labelProvider.getImage(object)
198 : null;
199 Hyperlink hyperlink;
200 if (image != null) {
201 hyperlink = getManagedForm().getToolkit().createImageHyperlink(
202 linkContainer, SWT.NULL);
203 ((ImageHyperlink) hyperlink).setImage(image);
204 } else
205 hyperlink = getManagedForm().getToolkit().createHyperlink(linkContainer,
206 null, SWT.NULL);
207 update(hyperlink, object);
208 hyperlink.setData(object);
209 hyperlink.addHyperlinkListener(linkHandler);
210 }
211 private void doEnter(Hyperlink link) {
212 String statusText = labelProvider != null ? labelProvider
213 .getStatusText(link.getData()) : link.getText();
214 getPage().getEditorSite().getActionBars().getStatusLineManager()
215 .setMessage(statusText);
216 }
217 private void doExit(Hyperlink link) {
218 getPage().getEditorSite().getActionBars().getStatusLineManager()
219 .setMessage(null);
220 }
221 protected void doLinkActivated(Hyperlink link) {
222 Object object = link.getData();
223 getPage().getEditor().setActivePage(morePageId, object);
224 }
225 public void setMorePageId(String id) {
226 this.morePageId = id;
227 }
228 public void setLinkNumberLimit(int limit) {
229 this.linkNumberLimit = limit;
230 }
231 public void setContentProvider(IStructuredContentProvider contentProvider) {
232 this.contentProvider = contentProvider;
233 }
234 public void setLabelProvider(ILinkLabelProvider provider) {
235 this.labelProvider = provider;
236 }
237 }
238 |
Popular Tags |
Java API By Example, From Geeks To Geeks.