Java tutorial
/******************************************************************************* * Copyright (c) 2009, 2014 Xored Software Inc 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: * Xored Software Inc - initial API and implementation and/or initial documentation *******************************************************************************/ package org.eclipse.rcptt.ui.commons; import java.util.ArrayList; import java.util.List; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IPath; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.Separator; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.jface.window.SameShellProvider; import org.eclipse.jface.wizard.WizardDialog; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.actions.DeleteResourceAction; import org.eclipse.ui.model.WorkbenchLabelProvider; import org.eclipse.ui.wizards.newresource.BasicNewFolderResourceWizard; import org.eclipse.rcptt.internal.ui.Images; import org.eclipse.rcptt.internal.ui.Messages; import org.eclipse.rcptt.ui.panels.Actions; import org.eclipse.rcptt.ui.wizards.LocationComposite; import org.eclipse.rcptt.ui.wizards.NewQ7ProjectWizard; public class Q7ContainerSelectionGroup extends Composite { private Listener listener; private IContainer selectedContainer; DataBindingContext dbc = new DataBindingContext(); private TreeViewer treeViewer; public Q7ContainerSelectionGroup(Composite parent, Listener listener, String message, int heightHint, int widthHint) { super(parent, SWT.NONE); this.listener = listener; createContents(message, heightHint, widthHint); } public void containerSelectionChanged(IContainer container) { selectedContainer = container; // fire an event so the parent can update its controls if (listener != null) { Event changeEvent = new Event(); changeEvent.type = SWT.Selection; changeEvent.widget = this; listener.handleEvent(changeEvent); } } /** * Creates the contents of the composite. * * @param message * @param heightHint * @param widthHint */ public void createContents(String message, int heightHint, int widthHint) { GridLayoutFactory.fillDefaults().applyTo(this); setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); Label label = new Label(this, SWT.WRAP); label.setText(message); label.setFont(this.getFont()); createTreeViewer(heightHint); Dialog.applyDialogFont(this); } private void createNewFolder() { BasicNewFolderResourceWizard wizard = new BasicNewFolderResourceWizard(); IWorkbench workbench = PlatformUI.getWorkbench(); wizard.init(workbench, new StructuredSelection(ResourcesPlugin.getWorkspace().getRoot())); wizard.setWindowTitle(Messages.Q7ContainerSelectionGroup_NewFolder_WindowTitle); wizard.init(PlatformUI.getWorkbench(), (IStructuredSelection) treeViewer.getSelection()); WizardDialog dialog = new WizardDialog(getParent().getShell(), wizard); if (dialog.open() == WizardDialog.OK) { ISelection selection = treeViewer.getSelection(); treeViewer.refresh(); treeViewer.setSelection(selection); } } private void createNewProject() { NewQ7ProjectWizard wizard = new NewQ7ProjectWizard(); IWorkbench workbench = PlatformUI.getWorkbench(); wizard.init(workbench, new StructuredSelection(ResourcesPlugin.getWorkspace().getRoot())); wizard.setWindowTitle(Messages.Q7ContainerSelectionGroup_NewQ7Project_WindowTitle); WizardDialog dialog = new WizardDialog(getParent().getShell(), wizard); if (dialog.open() == WizardDialog.OK) { IProject newProject = wizard.getNewProject(); if (newProject != null) { treeViewer.refresh(); treeViewer.setSelection(new StructuredSelection(newProject)); } } } @SuppressWarnings("restriction") protected void createTreeViewer(int heightHint) { // Create drill down. LocationComposite drillDown = new LocationComposite(this, SWT.NONE) { public void fillToolItems(org.eclipse.jface.action.ToolBarManager toolBarMgr) { Action newProject = new Action(Messages.Q7ContainerSelectionGroup_NewProject_ActionName) { @Override public void run() { createNewProject(); } }; newProject.setImageDescriptor(Images.getImageDescriptor(Images.NEW_PROJECT)); toolBarMgr.add(newProject); Action newFolder = new Action(Messages.Q7ContainerSelectionGroup_NewFolder_ActionName) { @Override public void run() { createNewFolder(); } }; newFolder.setImageDescriptor(Images.getImageDescriptor(Images.NEW_FOLDER)); toolBarMgr.add(newFolder); DeleteResourceAction deleteAction = new DeleteResourceAction(new SameShellProvider(this)) { public void run() { super.run(); treeViewer.refresh(); }; }; deleteAction.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages() .getImageDescriptor(ISharedImages.IMG_ETOOL_DELETE)); deleteAction.setText(""); //$NON-NLS-1$ deleteAction.setEnabled(false); toolBarMgr.add(deleteAction); treeViewer.addSelectionChangedListener(deleteAction); toolBarMgr.add(new Separator()); UpdateValueStrategy enablement = new UpdateValueStrategy() { @Override public Object convert(Object value) { return value != null; } }; dbc.bindValue(Actions.observeEnabled(newFolder), ViewersObservables.observeSingleSelection(treeViewer), null, enablement); // dbc.bindValue(Actions.observeEnabled(deleteAction), // ViewersObservables.observeSingleSelection(treeViewer), // null, enablement); }; }; GridData spec = new GridData(SWT.FILL, SWT.DEFAULT, true, false); spec.widthHint = 300; // spec.heightHint = heightHint; drillDown.setLayoutData(spec); // Create tree viewer inside drill down. treeViewer = new TreeViewer(this, SWT.BORDER); drillDown.setChildTree(treeViewer); Q7ContainerContentProvider cp = new Q7ContainerContentProvider(); cp.showClosedProjects(false); treeViewer.setContentProvider(cp); treeViewer.setLabelProvider(WorkbenchLabelProvider.getDecoratingWorkbenchLabelProvider()); treeViewer.setComparator(new ViewerComparator()); treeViewer.setUseHashlookup(true); treeViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { IStructuredSelection selection = (IStructuredSelection) event.getSelection(); containerSelectionChanged((IContainer) selection.getFirstElement()); // allow null } }); treeViewer.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { ISelection selection = event.getSelection(); if (selection instanceof IStructuredSelection) { Object item = ((IStructuredSelection) selection).getFirstElement(); if (item == null) { return; } if (treeViewer.getExpandedState(item)) { treeViewer.collapseToLevel(item, 1); } else { treeViewer.expandToLevel(item, 1); } } } }); // This has to be done after the viewer has been laid out treeViewer.setInput(ResourcesPlugin.getWorkspace()); } public IPath getContainerFullPath() { if (selectedContainer == null) return null; return selectedContainer.getFullPath(); } public void setInitialFocus() { treeViewer.getTree().setFocus(); } public void setSelectedContainer(IContainer container) { selectedContainer = container; // expand to and select the specified container List<IContainer> itemsToExpand = new ArrayList<IContainer>(); IContainer parent = container.getParent(); while (parent != null) { itemsToExpand.add(0, parent); parent = parent.getParent(); } treeViewer.setExpandedElements(itemsToExpand.toArray()); treeViewer.setSelection(new StructuredSelection(container), true); } }