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/*******************************************************************************
* Copyright (c) 2006, 2007 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
*******************************************************************************/
package org.eclipse.jface.examples.databinding.contentprovider.test;
import org.eclipse.core.databinding.observable.Observables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.set.IObservableSet;
import org.eclipse.core.databinding.observable.set.UnionSet;
import org.eclipse.core.databinding.observable.set.WritableSet;
import org.eclipse.core.internal.databinding.observable.tree.IUnorderedTreeProvider;
import org.eclipse.core.internal.databinding.observable.tree.TreePath;
import org.eclipse.jface.internal.databinding.internal.viewers.UnorderedTreeContentProvider;
import org.eclipse.jface.internal.databinding.provisional.viewers.ViewerLabelProvider;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.layout.LayoutConstants;
import org.eclipse.jface.viewers.IViewerLabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.ViewerLabel;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
/**
* Tests UpdatableTreeContentProvider and DirtyIndicationLabelProvider.
* Creates a tree containing three randomly-generated sets of integers,
* and one node that contains the union of the other sets.
*
* @since 3.2
*/
public class TreeContentProviderTest {
private Shell shell;
private TreeViewer tree;
// Three randomly-generated sets of doubles
private AsynchronousTestSet set1;
private AsynchronousTestSet set2;
private AsynchronousTestSet set3;
// The union of the above three sets
private UnionSet union;
private Button randomize;
public TreeContentProviderTest() {
// Create the data model
set1 = new AsynchronousTestSet();
set2 = new AsynchronousTestSet();
set3 = new AsynchronousTestSet();
// A union of the above sets
union = new UnionSet(new IObservableSet[] {set1, set2, set3});
// Create shell
shell = new Shell(Display.getCurrent());
createTree();
Composite buttonBar = new Composite(shell, SWT.NONE);
{
buttonBar.setLayout(new FillLayout(SWT.HORIZONTAL));
randomize = new Button(buttonBar, SWT.PUSH);
randomize.setText("Randomize");
randomize.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
AsynchronousTestSet.recomputeAll();
super.widgetSelected(e);
}
});
GridLayoutFactory.fillDefaults().generateLayout(buttonBar);
}
GridLayoutFactory.fillDefaults().margins(LayoutConstants.getMargins()).generateLayout(shell);
shell.addDisposeListener(new DisposeListener() {
/* (non-Javadoc)
* @see org.eclipse.swt.events.DisposeListener#widgetDisposed(org.eclipse.swt.events.DisposeEvent)
*/
public void widgetDisposed(DisposeEvent e) {
dispose();
}
});
}
/**
*
*/
protected void dispose() {
set1.dispose();
set2.dispose();
set3.dispose();
union.dispose();
}
private void createTree() {
// Create the tree provider. This provides the structure of the tree. This tree will
// have an instance of RootNode as the root (which is really a placeholder), several
// SimpleNodes as top-level nodes, and sets of randomly generated Doubles below each
// SimpleNode.
IUnorderedTreeProvider treeProvider = new IUnorderedTreeProvider() {
public IObservableSet createChildSet(TreePath treePath) {
// If the parent is the root node, return the union of some randomly-generated
// nodes and some hardcoded nodes
if (treePath.getSegmentCount()==0 || treePath.getLastSegment() == tree.getInput()) {
// Set of hardcoded nodes
WritableSet topElements = new WritableSet();
topElements.add(new SimpleNode("Random Set 1", set1));
topElements.add(new SimpleNode("Random Set 2", set2));
topElements.add(new SimpleNode("Random Set 3", set3));
topElements.add(new SimpleNode("Union of the other sets", union));
return topElements;
}
// If the parent is a RandomChildrenNode, return a randomly-generated
// set of Doubles for its children
Object element = treePath.getLastSegment();
if (element instanceof SimpleNode) {
// We return a new DelegatingObservableSet in order to prevent the
// original from being disposed.
return Observables.proxyObservableSet(((SimpleNode)element).getChildren());
}
// Otherwise the node is a Double, which will have no children
return null;
}
public Realm getRealm() {
// TODO Auto-generated method stub
return null;
}
};
// Label provider for the tree
IViewerLabelProvider labelProvider = new ViewerLabelProvider() {
public void updateLabel(ViewerLabel label, Object element) {
if (element instanceof SimpleNode) {
SimpleNode node = (SimpleNode) element;
label.setText(node.getNodeName());
}
if (element instanceof Integer) {
Integer node = (Integer) element;
label.setText("Integer " + node);
}
}
};
// Create tree viewer
tree = new TreeViewer(shell, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
// UpdatableTreeContentProvider converts an ITreeProvider into a standard JFace content provider
UnorderedTreeContentProvider contentProvider = new UnorderedTreeContentProvider(treeProvider,
"pending...");
tree.setContentProvider(contentProvider);
tree.setLabelProvider(labelProvider);
// For the ITreeProvider above, it doesn't matter what we select as the input.
tree.setInput(new Object());
}
/**
* @param args
*/
public static void main(String[] args) {
Display display = Display.getDefault();
TreeContentProviderTest test = new TreeContentProviderTest();
Shell s = test.getShell();
s.pack();
s.setVisible(true);
while (!s.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
private Shell getShell() {
return shell;
}
}
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