Java tutorial
/******************************************************************************* * Copyright (c) 2005, 2009 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.salever.swtjface.demo.binding; import java.beans.PropertyChangeListener; import java.beans.PropertyChangeSupport; import java.util.ArrayList; import java.util.List; 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.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 TreeViewerWithListFactory { 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 List<Bean> input = createInput(); private IObservableValue clipboard; /** * 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 { TreeViewerWithListFactory window = new TreeViewerWithListFactory(); window.open(); } catch (Exception e) { e.printStackTrace(); } } }); } private List<Bean> createInput() { return new ArrayList<Bean>(); } /** * 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) { // List<Bean> list = input.getBeans(); Bean root = createBean("root"); input.add(root); // input.setBeans(list); 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(); List<BeanItem> list = parent.getList(); BeanItem child = createBeanItem("child"); list.add(child); parent.setList(list); beanViewer.setSelection(new StructuredSelection(child)); 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]; // TreeItem parentItem = selectedItem.getParentItem(); // Bean parent; // int index; // if (parentItem == null) { // parent = input; // index = beanViewer.getTree().indexOf(selectedItem); // } else { // parent = (Bean) parentItem.getData(); // index = parentItem.indexOf(selectedItem); // } // // List list = new ArrayList(parent.getList()); // list.remove(index); // parent.setList(list); } }); 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; // // List list = new ArrayList(parent.getList()); // list.add(copy); // parent.setList(list); // // 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); 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); } private static BeanItem createBeanItem(String name) { return new BeanItem(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.list("list", BeanItem.class), BeanProperties.value(Bean.class, "text")); } static class Bean extends AbstractModelObject { private String text; private List<BeanItem> list; public Bean(String text) { this.text = text; list = new ArrayList<BeanItem>(); } public String getText() { return text; } public void setText(String value) { firePropertyChange("text", this.text, this.text = value); } public List<BeanItem> getList() { if (list == null) return null; return new ArrayList<BeanItem>(list); } public void setList(List<BeanItem> list) { if (list != null) list = new ArrayList<BeanItem>(list); firePropertyChange("list", this.list, this.list = list); } } static class BeanItem extends AbstractModelObject { String text; public BeanItem(String name) { this.text = name; } /** * @return the text */ public String getText() { return text; } /** * @param text * the text to set */ public void setText(String text) { firePropertyChange("text", this.text, this.text = text); } } static class ViewModel extends AbstractModelObject { private List<Bean> beans = new ArrayList<Bean>(); /** * @return the beans */ public List<Bean> getBeans() { return beans; } /** * @param beans * the beans to set */ public void setBeans(List<Bean> beans) { firePropertyChange("beans", this.beans, this.beans = beans); } } }