+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.swt;\r
+\r
+/*******************************************************************************\r
+ * Copyright (c) 2000, 2007 IBM Corporation and others.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * IBM Corporation - initial API and implementation\r
+ *******************************************************************************/\r
+\r
+import org.eclipse.core.runtime.Assert;\r
+import org.eclipse.core.runtime.ListenerList;\r
+import org.eclipse.core.runtime.SafeRunner;\r
+import org.eclipse.jface.util.SafeRunnable;\r
+import org.eclipse.jface.viewers.IPostSelectionProvider;\r
+import org.eclipse.jface.viewers.ISelection;\r
+import org.eclipse.jface.viewers.ISelectionChangedListener;\r
+import org.eclipse.jface.viewers.ISelectionProvider;\r
+import org.eclipse.jface.viewers.SelectionChangedEvent;\r
+import org.eclipse.jface.viewers.StructuredSelection;\r
+import org.eclipse.ui.IEditorPart;\r
+\r
+/**\r
+ * Manages the current selection in a multi-page editor by tracking the active\r
+ * nested editor within the multi-page editor. When the selection changes,\r
+ * notifications are sent to all registered listeners.\r
+ * <p>\r
+ * This class may be instantiated; it is not intended to be subclassed.\r
+ * The base implementation of <code>MultiPageEditor.init</code> creates\r
+ * an instance of this class.\r
+ * </p>\r
+ */\r
+public class TabbedPageSelectionProvider implements IPostSelectionProvider {\r
+\r
+ /**\r
+ * Registered selection changed listeners (element type:\r
+ * <code>ISelectionChangedListener</code>).\r
+ */\r
+ private final ListenerList listeners = new ListenerList();\r
+\r
+ /**\r
+ * Registered post selection changed listeners.\r
+ */\r
+ private final ListenerList postListeners = new ListenerList();\r
+\r
+ /**\r
+ * The multi-page editor.\r
+ */\r
+ private final TabbedPropertyPage multiPageEditor;\r
+\r
+ /**\r
+ * Creates a selection provider for the given multi-page editor.\r
+ *\r
+ * @param multiPageEditor the multi-page editor\r
+ */\r
+ public TabbedPageSelectionProvider(TabbedPropertyPage multiPageEditor) {\r
+ Assert.isNotNull(multiPageEditor);\r
+ this.multiPageEditor = multiPageEditor;\r
+ }\r
+\r
+ /* (non-Javadoc)\r
+ * Method declared on <code>ISelectionProvider</code>.\r
+ */\r
+ public void addSelectionChangedListener(ISelectionChangedListener listener) {\r
+ listeners.add(listener);\r
+ }\r
+\r
+ /**\r
+ * Adds a listener for post selection changes in this multi page selection provider.\r
+ *\r
+ * @param listener a selection changed listener\r
+ * @since 3.2\r
+ */\r
+ public void addPostSelectionChangedListener(ISelectionChangedListener listener) {\r
+ postListeners.add(listener);\r
+ }\r
+\r
+ /**\r
+ * Notifies all registered selection changed listeners that the editor's\r
+ * selection has changed. Only listeners registered at the time this method is\r
+ * called are notified.\r
+ *\r
+ * @param event the selection changed event\r
+ */\r
+ public void fireSelectionChanged(final SelectionChangedEvent event) {\r
+ Object[] listeners = this.listeners.getListeners();\r
+ fireEventChange(event, listeners);\r
+ }\r
+\r
+ /**\r
+ * Notifies all post selection changed listeners that the editor's\r
+ * selection has changed.\r
+ * \r
+ * @param event the event to propogate.\r
+ * @since 3.2\r
+ */\r
+ public void firePostSelectionChanged(final SelectionChangedEvent event) {\r
+ Object[] listeners = postListeners.getListeners();\r
+ fireEventChange(event, listeners);\r
+ }\r
+\r
+ private void fireEventChange(final SelectionChangedEvent event, Object[] listeners) {\r
+ for (int i = 0; i < listeners.length; ++i) {\r
+ final ISelectionChangedListener l = (ISelectionChangedListener) listeners[i];\r
+ SafeRunner.run(new SafeRunnable() {\r
+ public void run() {\r
+ l.selectionChanged(event);\r
+ }\r
+ });\r
+ }\r
+ }\r
+\r
+ /**\r
+ * Returns the multi-page editor.\r
+ * @return the multi-page editor.\r
+ */\r
+ public TabbedPropertyPage getMultiPageEditor() {\r
+ return multiPageEditor;\r
+ }\r
+\r
+ /* (non-Javadoc)\r
+ * Method declared on <code>ISelectionProvider</code>.\r
+ */\r
+ public ISelection getSelection() {\r
+ IEditorPart activeEditor = multiPageEditor.getActiveEditor();\r
+ if (activeEditor != null) {\r
+ ISelectionProvider selectionProvider = activeEditor.getSite()\r
+ .getSelectionProvider();\r
+ if (selectionProvider != null) {\r
+ return selectionProvider.getSelection();\r
+ }\r
+ }\r
+ return StructuredSelection.EMPTY;\r
+ }\r
+\r
+ /* (non-JavaDoc)\r
+ * Method declaed on <code>ISelectionProvider</code>.\r
+ */\r
+ public void removeSelectionChangedListener(\r
+ ISelectionChangedListener listener) {\r
+ listeners.remove(listener);\r
+ }\r
+\r
+ /**\r
+ * Removes a listener for post selection changes in this multi page selection provider.\r
+ *\r
+ * @param listener a selection changed listener\r
+ * @since 3.2\r
+ */\r
+ public void removePostSelectionChangedListener(ISelectionChangedListener listener) {\r
+ postListeners.remove(listener);\r
+ }\r
+\r
+ /* (non-Javadoc)\r
+ * Method declared on <code>ISelectionProvider</code>.\r
+ */\r
+ public void setSelection(ISelection selection) {\r
+ IEditorPart activeEditor = multiPageEditor.getActiveEditor();\r
+ if (activeEditor != null) {\r
+ ISelectionProvider selectionProvider = activeEditor.getSite()\r
+ .getSelectionProvider();\r
+ if (selectionProvider != null) {\r
+ selectionProvider.setSelection(selection);\r
+ }\r
+ }\r
+ }\r
+}\r