| /******************************************************************************* |
| * Copyright (c) 2005, 2008 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| * Matthew Hall - bugs 260329, 260337 |
| *******************************************************************************/ |
| package org.eclipse.jface.examples.databinding.snippets; |
| |
| import java.beans.PropertyChangeListener; |
| import java.beans.PropertyChangeSupport; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.databinding.DataBindingContext; |
| import org.eclipse.core.databinding.beans.BeanProperties; |
| import org.eclipse.core.databinding.beans.BeansObservables; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.value.ComputedValue; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.core.databinding.observable.value.WritableValue; |
| import org.eclipse.jface.databinding.swt.SWTObservables; |
| import org.eclipse.jface.databinding.viewers.ViewerSupport; |
| import org.eclipse.jface.databinding.viewers.ViewersObservables; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.viewers.ViewerComparator; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.SelectionAdapter; |
| import org.eclipse.swt.events.SelectionEvent; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.layout.RowLayout; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Label; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Text; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.TreeItem; |
| |
| public class Snippet020TreeViewerWithSetFactory { |
| |
| private Button pasteButton; |
| private Button copyButton; |
| private Shell shell; |
| private Button addChildBeanButton; |
| private Button removeBeanButton; |
| private TreeViewer beanViewer; |
| private Tree tree; |
| private Text beanText; |
| private DataBindingContext m_bindingContext; |
| |
| private Bean input = createBean("input"); |
| private IObservableValue clipboard; |
| static int counter = 0; |
| |
| /** |
| * Launch the application |
| * |
| * @param args |
| */ |
| public static void main(String[] args) { |
| Display display = Display.getDefault(); |
| Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() { |
| public void run() { |
| try { |
| Snippet020TreeViewerWithSetFactory window = new Snippet020TreeViewerWithSetFactory(); |
| window.open(); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| }); |
| } |
| |
| /** |
| * Open the window |
| */ |
| public void open() { |
| final Display display = Display.getDefault(); |
| createContents(); |
| shell.open(); |
| shell.layout(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| } |
| |
| /** |
| * Create contents of the window |
| */ |
| protected void createContents() { |
| shell = new Shell(); |
| final GridLayout gridLayout_1 = new GridLayout(); |
| gridLayout_1.numColumns = 2; |
| shell.setLayout(gridLayout_1); |
| shell.setSize(535, 397); |
| shell.setText("SWT Application"); |
| |
| final Composite group = new Composite(shell, SWT.NONE); |
| final RowLayout rowLayout = new RowLayout(); |
| rowLayout.marginTop = 0; |
| rowLayout.marginRight = 0; |
| rowLayout.marginLeft = 0; |
| rowLayout.marginBottom = 0; |
| rowLayout.pack = false; |
| group.setLayout(rowLayout); |
| group |
| .setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false, |
| 2, 1)); |
| |
| final Button addRootButton = new Button(group, SWT.NONE); |
| addRootButton.addSelectionListener(new SelectionAdapter() { |
| public void widgetSelected(final SelectionEvent e) { |
| Set set = input.getSet(); |
| Bean root = createBean("root"); |
| set.add(root); |
| input.setSet(set); |
| |
| beanViewer.setSelection(new StructuredSelection(root)); |
| beanText.selectAll(); |
| beanText.setFocus(); |
| } |
| }); |
| addRootButton.setText("Add Root"); |
| |
| addChildBeanButton = new Button(group, SWT.NONE); |
| addChildBeanButton.addSelectionListener(new SelectionAdapter() { |
| public void widgetSelected(final SelectionEvent e) { |
| Bean parent = getSelectedBean(); |
| Set set = new HashSet(parent.getSet()); |
| Bean child = createBean("child" + (counter++)); |
| set.add(child); |
| parent.setSet(set); |
| |
| // beanViewer.setSelection(new StructuredSelection(parent)); |
| // beanText.selectAll(); |
| // beanText.setFocus(); |
| } |
| }); |
| addChildBeanButton.setText("Add Child"); |
| |
| removeBeanButton = new Button(group, SWT.NONE); |
| removeBeanButton.addSelectionListener(new SelectionAdapter() { |
| public void widgetSelected(final SelectionEvent e) { |
| TreeItem selectedItem = beanViewer.getTree().getSelection()[0]; |
| Bean bean = (Bean) selectedItem.getData(); |
| TreeItem parentItem = selectedItem.getParentItem(); |
| Bean parent; |
| if (parentItem == null) |
| parent = input; |
| else |
| parent = (Bean) parentItem.getData(); |
| |
| Set set = new HashSet(parent.getSet()); |
| set.remove(bean); |
| parent.setSet(set); |
| } |
| }); |
| removeBeanButton.setText("Remove"); |
| |
| copyButton = new Button(group, SWT.NONE); |
| copyButton.addSelectionListener(new SelectionAdapter() { |
| public void widgetSelected(final SelectionEvent e) { |
| clipboard.setValue(getSelectedBean()); |
| } |
| }); |
| copyButton.setText("Copy"); |
| |
| pasteButton = new Button(group, SWT.NONE); |
| pasteButton.addSelectionListener(new SelectionAdapter() { |
| public void widgetSelected(final SelectionEvent e) { |
| Bean copy = (Bean) clipboard.getValue(); |
| if (copy == null) |
| return; |
| Bean parent = getSelectedBean(); |
| if (parent == null) |
| parent = input; |
| |
| Set set = new HashSet(parent.getSet()); |
| set.add(copy); |
| parent.setSet(set); |
| |
| beanViewer.setSelection(new StructuredSelection(copy)); |
| beanText.selectAll(); |
| beanText.setFocus(); |
| } |
| }); |
| pasteButton.setText("Paste"); |
| |
| final Button refreshButton = new Button(group, SWT.NONE); |
| refreshButton.addSelectionListener(new SelectionAdapter() { |
| public void widgetSelected(final SelectionEvent e) { |
| beanViewer.refresh(); |
| } |
| }); |
| refreshButton.setText("Refresh"); |
| |
| beanViewer = new TreeViewer(shell, SWT.FULL_SELECTION | SWT.BORDER); |
| beanViewer.setUseHashlookup(true); |
| beanViewer.setComparator(new ViewerComparator()); |
| tree = beanViewer.getTree(); |
| tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1)); |
| |
| final Label itemNameLabel = new Label(shell, SWT.NONE); |
| itemNameLabel.setText("Item Name"); |
| |
| beanText = new Text(shell, SWT.BORDER); |
| final GridData gd_beanValue = new GridData(SWT.FILL, SWT.CENTER, true, |
| false); |
| beanText.setLayoutData(gd_beanValue); |
| m_bindingContext = initDataBindings(); |
| // |
| initExtraBindings(m_bindingContext); |
| } |
| |
| private static Bean createBean(String name) { |
| return new Bean(name); |
| } |
| |
| protected DataBindingContext initDataBindings() { |
| IObservableValue treeViewerSelectionObserveSelection = ViewersObservables |
| .observeSingleSelection(beanViewer); |
| IObservableValue textTextObserveWidget = SWTObservables.observeText( |
| beanText, SWT.Modify); |
| IObservableValue treeViewerValueObserveDetailValue = BeansObservables |
| .observeDetailValue(treeViewerSelectionObserveSelection, |
| "text", String.class); |
| // |
| // |
| DataBindingContext bindingContext = new DataBindingContext(); |
| // |
| bindingContext.bindValue(textTextObserveWidget, |
| treeViewerValueObserveDetailValue); |
| // |
| return bindingContext; |
| } |
| |
| private Bean getSelectedBean() { |
| IStructuredSelection selection = (IStructuredSelection) beanViewer |
| .getSelection(); |
| if (selection.isEmpty()) |
| return null; |
| return (Bean) selection.getFirstElement(); |
| } |
| |
| private void initExtraBindings(DataBindingContext dbc) { |
| final IObservableValue beanViewerSelection = ViewersObservables |
| .observeSingleSelection(beanViewer); |
| IObservableValue beanSelected = new ComputedValue(Boolean.TYPE) { |
| protected Object calculate() { |
| return Boolean.valueOf(beanViewerSelection.getValue() != null); |
| } |
| }; |
| dbc.bindValue(SWTObservables.observeEnabled(addChildBeanButton), |
| beanSelected); |
| dbc.bindValue(SWTObservables.observeEnabled(removeBeanButton), |
| beanSelected); |
| |
| clipboard = new WritableValue(); |
| dbc.bindValue(SWTObservables.observeEnabled(copyButton), beanSelected); |
| dbc.bindValue(SWTObservables.observeEnabled(pasteButton), |
| new ComputedValue(Boolean.TYPE) { |
| protected Object calculate() { |
| return Boolean.valueOf(clipboard.getValue() != null); |
| } |
| }); |
| |
| ViewerSupport.bind(beanViewer, input, BeanProperties.set("set", |
| Bean.class), BeanProperties.value(Bean.class, "text")); |
| } |
| |
| static class Bean { |
| /* package */PropertyChangeSupport changeSupport = new PropertyChangeSupport( |
| this); |
| private String text; |
| private Set set; |
| |
| public Bean(String text) { |
| this.text = text; |
| set = new HashSet(); |
| } |
| |
| public void addPropertyChangeListener(PropertyChangeListener listener) { |
| changeSupport.addPropertyChangeListener(listener); |
| } |
| |
| public void removePropertyChangeListener(PropertyChangeListener listener) { |
| changeSupport.removePropertyChangeListener(listener); |
| } |
| |
| public String getText() { |
| return text; |
| } |
| |
| public void setText(String value) { |
| changeSupport.firePropertyChange("text", this.text, |
| this.text = value); |
| } |
| |
| public Set getSet() { |
| if (set == null) |
| return null; |
| return new HashSet(set); |
| } |
| |
| public void setSet(Set set) { |
| if (set != null) |
| set = new HashSet(set); |
| changeSupport.firePropertyChange("set", this.set, this.set = set); |
| } |
| |
| public boolean hasListeners(String propertyName) { |
| return changeSupport.hasListeners(propertyName); |
| } |
| } |
| } |