Java tutorial
/******************************************************************************* * Copyright (c) 2011 Research Group for Industrial Software (INSO), Vienna University of Technology. * 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: * Research Group for Industrial Software (INSO), Vienna University of Technology - initial API and implementation *******************************************************************************/ package org.eclipse.mylyn.internal.versions.tasks.ui; import java.util.ArrayList; import java.util.List; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.NullProgressMonitor; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.action.ToolBarManager; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.mylyn.tasks.core.ITask; import org.eclipse.mylyn.tasks.core.ITaskContainer; import org.eclipse.mylyn.versions.core.ChangeSet; import org.eclipse.mylyn.versions.tasks.core.IChangeSetMapping; import org.eclipse.mylyn.versions.tasks.core.TaskChangeSet; import org.eclipse.mylyn.versions.tasks.ui.AbstractChangesetMappingProvider; import org.eclipse.mylyn.versions.tasks.ui.TaskChangesetUtil; import org.eclipse.mylyn.versions.tasks.ui.spi.ITaskVersionsContributionAction; import org.eclipse.mylyn.versions.tasks.ui.spi.ITaskVersionsModel; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.BusyIndicator; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Menu; import org.eclipse.ui.forms.AbstractFormPart; import org.eclipse.ui.forms.IManagedForm; import org.eclipse.ui.forms.widgets.ExpandableComposite; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.Section; /** * @author Kilian Matt */ @SuppressWarnings("restriction") public class ChangesetPart extends AbstractFormPart { private TableViewer table; private final ChangesetModel model = new ChangesetModel(); private ChangeSetPage page; public Control createControl(Composite parent, FormToolkit toolkit) { Section createSection = createSection(parent, toolkit); Composite composite = createContentComposite(toolkit, createSection); createTable(composite); return createSection; } @Override public void initialize(IManagedForm form) { super.initialize(form); } public void initialize(ChangeSetPage page) { this.page = page; } private Composite createContentComposite(FormToolkit toolkit, Section createSection) { Composite composite = toolkit.createComposite(createSection); createSection.setClient(composite); composite.setLayout(new FillLayout()); return composite; } private Section createSection(Composite parent, FormToolkit toolkit) { Section createSection = toolkit.createSection(parent, ExpandableComposite.TITLE_BAR | ExpandableComposite.TWISTIE | ExpandableComposite.EXPANDED); createSection.setText("Changesets"); GridLayout gl = new GridLayout(1, false); gl.marginBottom = 16; GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true); gd.horizontalSpan = 4; createSection.setLayout(gl); createSection.setLayoutData(gd); addToolBar(toolkit, createSection); return createSection; } private void createTable(Composite composite) { table = new TableViewer(composite); table.getTable().setLinesVisible(true); table.getTable().setHeaderVisible(true); addColumn(table, "Id"); addColumn(table, "Message"); addColumn(table, "Author"); addColumn(table, "Date"); table.setContentProvider(ArrayContentProvider.getInstance()); table.setLabelProvider(new TaskChangesetLabelProvider()); refreshInput(); registerContextMenu(table); } private void addToolBar(FormToolkit toolkit, Section section) { ToolBarManager toolBarManager = new ToolBarManager(SWT.FLAT); fillToolBar(toolBarManager); if (toolBarManager.getSize() == 0) { return; } Composite toolbarComposite = toolkit.createComposite(section); toolbarComposite.setBackground(null); RowLayout rowLayout = new RowLayout(); rowLayout.marginLeft = 0; rowLayout.marginRight = 0; rowLayout.marginTop = 0; rowLayout.marginBottom = 0; rowLayout.center = true; toolbarComposite.setLayout(rowLayout); toolBarManager.createControl(toolbarComposite); section.clientVerticalSpacing = 0; section.descriptionVerticalSpacing = 0; section.setTextClient(toolbarComposite); } private void fillToolBar(ToolBarManager toolBarManager) { toolBarManager.add(new IncludeSubTasksAction(model)); List<ITaskVersionsContributionAction> contributions = InternalExtensionPointLoader .loadActionContributions(); for (final ITaskVersionsContributionAction action : contributions) { toolBarManager.add(new ActionDelegate(action) { @Override public void runWithEvent(Event event) { action.run(model); } }); } } private void registerContextMenu(TableViewer table) { MenuManager menuManager = new MenuManager(); menuManager.setRemoveAllWhenShown(true); getPage().getEditorSite().registerContextMenu("org.eclipse.mylyn.versions.changesets", menuManager, table, true); Menu menu = menuManager.createContextMenu(table.getControl()); table.getTable().setMenu(menu); } private void addColumn(TableViewer table, String name) { TableViewerColumn tableViewerColumn = new TableViewerColumn(table, SWT.LEFT); tableViewerColumn.getColumn().setText(name); tableViewerColumn.getColumn().setWidth(100); } private AbstractChangesetMappingProvider determineBestProvider(final ITask task) { AbstractChangesetMappingProvider bestProvider = new NullProvider(); int score = Integer.MIN_VALUE; for (AbstractChangesetMappingProvider mappingProvider : TaskChangesetUtil.getMappingProviders()) { if (score < mappingProvider.getScoreFor(task)) { bestProvider = mappingProvider; } } return bestProvider; } private static class NullProvider extends AbstractChangesetMappingProvider { @Override public void getChangesetsForTask(IChangeSetMapping mapping, IProgressMonitor monitor) throws CoreException { } @Override public int getScoreFor(ITask task) { return 0; } } private IChangeSetMapping createChangeSetMapping(final ITask task, final List<TaskChangeSet> changesets) { return new IChangeSetMapping() { public ITask getTask() { return task; } public void addChangeSet(ChangeSet changeset) { changesets.add(new TaskChangeSet(task, changeset)); } }; } private void refreshInput() { table.setInput(model.getInput()); } private class ChangesetModel implements ITaskVersionsModel { private boolean includeSubTasks; public void setIncludeSubTasks(boolean includeSubTasks) { boolean isChanged = this.includeSubTasks ^ includeSubTasks; this.includeSubTasks = includeSubTasks; if (isChanged) { refreshInput(); } } public List<TaskChangeSet> getInput() { final ITask task = getPage().getTask(); AbstractChangesetMappingProvider bestProvider = determineBestProvider(task); final List<TaskChangeSet> changesets = new ArrayList<TaskChangeSet>(); final List<IChangeSetMapping> changesetsMapping = new ArrayList<IChangeSetMapping>(); changesetsMapping.add(createChangeSetMapping(task, changesets)); ; if (includeSubTasks) { if (task instanceof ITaskContainer) { ITaskContainer taskContainer = (ITaskContainer) task; for (ITask subTask : taskContainer.getChildren()) { changesetsMapping.add(createChangeSetMapping(subTask, changesets)); } } } final AbstractChangesetMappingProvider provider = bestProvider; BusyIndicator.showWhile(Display.getDefault(), new Runnable() { public void run() { try { for (IChangeSetMapping csm : changesetsMapping) { provider.getChangesetsForTask(csm, new NullProgressMonitor()); } } catch (CoreException e) { } } }); return changesets; } } private ChangeSetPage getPage() { return page; } }