Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2008 Tasktop Technologies and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Tasktop Technologies - initial API and implementation *******************************************************************************/ package org.eclipse.mylyn.internal.sandbox.ui.views; import java.util.ArrayList; import java.util.Collection; import java.util.List; import java.util.Set; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IAction; import org.eclipse.jface.action.IContributionManager; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.IToolBarManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.action.Separator; import org.eclipse.jface.util.LocalSelectionTransfer; import org.eclipse.jface.util.TransferDragSourceListener; import org.eclipse.jface.viewers.DecoratingLabelProvider; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.mylyn.commons.core.StatusHandler; import org.eclipse.mylyn.context.core.AbstractContextListener; import org.eclipse.mylyn.context.core.AbstractContextStructureBridge; import org.eclipse.mylyn.context.core.ContextCore; import org.eclipse.mylyn.context.core.IInteractionContext; import org.eclipse.mylyn.context.core.IInteractionElement; import org.eclipse.mylyn.context.ui.AbstractContextUiBridge; import org.eclipse.mylyn.internal.context.core.AbstractRelationProvider; import org.eclipse.mylyn.internal.context.core.ContextCorePlugin; import org.eclipse.mylyn.internal.context.core.IRelationsListener; import org.eclipse.mylyn.internal.context.ui.ContextUiPlugin; import org.eclipse.mylyn.internal.context.ui.DoiOrderSorter; import org.eclipse.mylyn.internal.context.ui.views.ContextNodeOpenListener; import org.eclipse.mylyn.internal.sandbox.ui.DelegatingContextLabelProvider; import org.eclipse.mylyn.internal.sandbox.ui.SandboxUiImages; import org.eclipse.mylyn.internal.sandbox.ui.actions.LinkActiveSearchWithEditorAction; import org.eclipse.mylyn.internal.sandbox.ui.actions.ShowQualifiedNamesAction; import org.eclipse.mylyn.internal.sandbox.ui.actions.ToggleRelationshipProviderAction; import org.eclipse.swt.SWT; import org.eclipse.swt.dnd.DND; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeItem; import org.eclipse.ui.IActionBars; import org.eclipse.ui.IViewPart; import org.eclipse.ui.IWorkbenchActionConstants; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.part.ViewPart; /** * TODO: this view won't work properly if visible on initial startup, due to the relation providers not being available * as a result of lazy loading. * * @author Mik Kersten */ public class ActiveSearchView extends ViewPart { private final class ContextListener extends AbstractContextListener implements IRelationsListener { @Override public void interestChanged(List<IInteractionElement> nodes) { refresh(nodes.get(nodes.size() - 1), false); } @Override public void contextActivated(IInteractionContext taskscape) { refreshRelatedElements(); refresh(null, true); } @Override public void contextDeactivated(IInteractionContext taskscape) { refresh(null, true); } @Override public void contextCleared(IInteractionContext context) { refresh(null, true); } @Override public void landmarkAdded(IInteractionElement node) { refresh(null, true); } @Override public void landmarkRemoved(IInteractionElement node) { refresh(null, true); } public void relationsChanged(IInteractionElement node) { refresh(node, true); } @Override public void elementsDeleted(List<IInteractionElement> elements) { refresh(null, true); } } private static final String STOP_JOBS_LABEL = "Stop Active Search Jobs"; public static final String ID = "org.eclipse.mylyn.ui.views.active.search"; private TreeViewer viewer; private final List<ToggleRelationshipProviderAction> relationshipProviderActions = new ArrayList<ToggleRelationshipProviderAction>(); private final DelegatingContextLabelProvider labelProvider = new DelegatingContextLabelProvider(); public void refreshRelatedElements() { try { for (AbstractRelationProvider provider : ContextCorePlugin.getDefault().getRelationProviders()) { List<AbstractRelationProvider> providerList = new ArrayList<AbstractRelationProvider>(); providerList.add(provider); updateDegreesOfSeparation(providerList, provider.getCurrentDegreeOfSeparation()); } } catch (Throwable t) { StatusHandler.log( new Status(IStatus.ERROR, ContextUiPlugin.ID_PLUGIN, "Could not refresh related elements", t)); } } /** * For testing. */ private boolean syncExecForTesting = true; private final AbstractContextListener REFRESH_UPDATE_LISTENER = new ContextListener(); public static ActiveSearchView getFromActivePerspective() { if (PlatformUI.getWorkbench() == null) { return null; } IWorkbenchPage activePage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(); if (activePage == null) { return null; } IViewPart view = activePage.findView(ID); if (view instanceof ActiveSearchView) { return (ActiveSearchView) view; } return null; } public ActiveSearchView() { ContextCore.getContextManager().addListener(REFRESH_UPDATE_LISTENER); for (AbstractRelationProvider provider : ContextCorePlugin.getDefault().getRelationProviders()) { provider.setEnabled(true); } refreshRelatedElements(); } public void updateDegreesOfSeparation(Collection<AbstractRelationProvider> providers, int degreeOfSeparation) { for (AbstractRelationProvider provider : providers) { updateDegreeOfSeparation(provider, degreeOfSeparation); } } public void updateDegreeOfSeparation(AbstractRelationProvider provider, int degreeOfSeparation) { ContextCorePlugin.getContextManager().resetLandmarkRelationshipsOfKind(provider.getId()); ContextUiPlugin.getDefault().getPreferenceStore().setValue(provider.getGenericId(), degreeOfSeparation); provider.setDegreeOfSeparation(degreeOfSeparation); for (IInteractionElement element : ContextCore.getContextManager().getActiveContext().getInteresting()) { if (element.getInterest().isLandmark()) { provider.landmarkAdded(element); } } } @Override public void dispose() { super.dispose(); ContextCore.getContextManager().removeListener(REFRESH_UPDATE_LISTENER); } /** * fix for bug 109235 * * @param node * @param updateLabels */ void refresh(final IInteractionElement node, final boolean updateLabels) { if (!syncExecForTesting) { // for testing // if (viewer != null && !viewer.getTree().isDisposed()) { // internalRefresh(node, updateLabels); // } PlatformUI.getWorkbench().getDisplay().syncExec(new Runnable() { public void run() { try { internalRefresh(node, updateLabels); } catch (Throwable t) { StatusHandler.log(new Status(IStatus.ERROR, ContextUiPlugin.ID_PLUGIN, "Refresh of active search failed", t)); } } }); } else { PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() { public void run() { try { internalRefresh(node, updateLabels); } catch (Throwable t) { StatusHandler.log(new Status(IStatus.ERROR, ContextUiPlugin.ID_PLUGIN, "Refresh of active search failed", t)); } } }); } } private void internalRefresh(final IInteractionElement node, boolean updateLabels) { Object toRefresh = null; if (node != null) { AbstractContextStructureBridge bridge = ContextCore.getStructureBridge(node.getContentType()); toRefresh = bridge.getObjectForHandle(node.getHandleIdentifier()); } if (viewer != null && !viewer.getTree().isDisposed()) { viewer.getControl().setRedraw(false); if (toRefresh != null && containsNode(viewer.getTree(), toRefresh)) { viewer.refresh(toRefresh, updateLabels); } else if (node == null) { viewer.refresh(); } viewer.expandToLevel(3); viewer.getControl().setRedraw(true); } } private boolean containsNode(Tree tree, Object object) { boolean contains = false; for (int i = 0; i < tree.getItems().length; i++) { TreeItem item = tree.getItems()[i]; if (object.equals(item.getData())) { contains = true; } } return contains; } private void initDrop() { Transfer[] types = new Transfer[] { LocalSelectionTransfer.getTransfer() }; viewer.addDropSupport(DND.DROP_MOVE, types, new ActiveViewDropAdapter(viewer)); } private void initDrag() { int ops = DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK; Transfer[] transfers = new Transfer[] { LocalSelectionTransfer.getTransfer() }; TransferDragSourceListener[] dragListeners = new TransferDragSourceListener[] { new ActiveViewSelectionDragAdapter(viewer) };//, new ActiveViewResourceDragAdapter(viewer) }; viewer.addDragSupport(ops, transfers, new ActiveViewDelegatingDragAdapter(dragListeners)); } /** * This is a callback that will allow us to create the viewer and initialize it. */ @Override public void createPartControl(Composite parent) { viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); viewer.setUseHashlookup(true); viewer.setContentProvider(new ContextContentProvider(viewer.getTree(), this.getViewSite(), true)); // viewer.setLabelProvider(labelProvider); viewer.setLabelProvider(new DecoratingLabelProvider(labelProvider, PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator())); viewer.setSorter(new DoiOrderSorter()); viewer.setInput(getViewSite()); hookContextMenu(); initDrop(); initDrag(); getSite().setSelectionProvider(getViewer()); viewer.addOpenListener(new ContextNodeOpenListener(viewer)); contributeToActionBars(); viewer.expandToLevel(2); } private void hookContextMenu() { MenuManager menuMgr = new MenuManager("#PopupMenu"); menuMgr.setRemoveAllWhenShown(true); menuMgr.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager manager) { ActiveSearchView.this.fillContextMenu(manager); } }); Menu menu = menuMgr.createContextMenu(viewer.getControl()); viewer.getControl().setMenu(menu); getSite().registerContextMenu(menuMgr, viewer); } private void contributeToActionBars() { IActionBars bars = getViewSite().getActionBars(); fillLocalPullDown(bars.getMenuManager()); fillLocalToolBar(bars.getToolBarManager()); } private void fillContextMenu(IMenuManager manager) { manager.add(new Separator()); manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS)); } private void fillLocalToolBar(IToolBarManager manager) { IAction qualifyElements = new ShowQualifiedNamesAction(this); manager.add(qualifyElements); fillActions(manager); manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS)); } private void fillLocalPullDown(IMenuManager manager) { fillActions(manager); IAction stopAction = new Action() { @Override public void run() { for (AbstractRelationProvider provider : ContextCorePlugin.getDefault().getRelationProviders()) { provider.stopAllRunningJobs(); } } }; stopAction.setToolTipText(STOP_JOBS_LABEL); stopAction.setText(STOP_JOBS_LABEL); stopAction.setImageDescriptor(SandboxUiImages.STOP_SEARCH); manager.add(stopAction); manager.add(new Separator()); manager.add(new LinkActiveSearchWithEditorAction()); manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS)); } private void fillActions(IContributionManager manager) { List<AbstractContextUiBridge> bridges = ContextUiPlugin.getDefault().getUiBridges(); for (AbstractContextUiBridge uiBridge : bridges) { Set<AbstractRelationProvider> providers = ContextCorePlugin.getDefault() .getRelationProviders(uiBridge.getContentType()); if (providers != null && providers.size() > 0) { ToggleRelationshipProviderAction action = new ToggleRelationshipProviderAction(this, providers, uiBridge); relationshipProviderActions.add(action); manager.add(action); } } } /** * Passing the focus request to the viewer's control. */ @Override public void setFocus() { viewer.refresh(); viewer.getControl().setFocus(); // TODO: foo } public TreeViewer getViewer() { return viewer; } /** * Set to false for testing */ public void setSyncExecForTesting(boolean asyncRefreshMode) { this.syncExecForTesting = asyncRefreshMode; } public void setQualifiedNameMode(boolean qualifiedNameMode) { DelegatingContextLabelProvider.setQualifyNamesMode(qualifiedNameMode); refresh(null, true); } }