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Re: TreeViewer collapses nodes after sorter is set. [message #727920 is a reply to message #727901] |
Thu, 22 September 2011 08:38 |
Vijay Raj Messages: 608 Registered: July 2009 |
Senior Member |
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it is strange indeed...
in the below snippet,why is it only expanding "item0.5.*" nodes and not others?
/*******************************************************************************
* Copyright (c) 2006 Tom Schindl 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:
* Tom Schindl - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.snippets.viewers;
import java.util.ArrayList;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TreeColumn;
/**
* A simple TreeViewer to demonstrate usage
*
* @author Tom Schindl <tom.schindl@bestsolution.at>
*
*/
public class Snippet002TreeViewer {
private class MyContentProvider implements ITreeContentProvider {
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
*/
public Object[] getElements(Object inputElement) {
return ((MyModel)inputElement).child.toArray();
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
*/
public void dispose() {
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
*/
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
*/
public Object[] getChildren(Object parentElement) {
return getElements(parentElement);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
*/
public Object getParent(Object element) {
if( element == null) {
return null;
}
return ((MyModel)element).parent;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
*/
public boolean hasChildren(Object element) {
return ((MyModel)element).child.size() > 0;
}
}
public class MyModel implements Comparable<MyModel>{
public MyModel parent;
public ArrayList child = new ArrayList();
public int counter;
public MyModel(int counter, MyModel parent) {
this.parent = parent;
this.counter = counter;
}
public String toString() {
String rv = "Item ";
if( parent != null ) {
rv = parent.toString() + ".";
}
rv += counter;
return rv;
}
@Override
public int compareTo(MyModel o) {
return o.counter-counter;
}
}
public Snippet002TreeViewer(Shell shell) {
final TreeViewer v = new TreeViewer(shell);
v.setAutoExpandLevel(TreeViewer.ALL_LEVELS);
v.setLabelProvider(new LabelProvider());
v.setContentProvider(new MyContentProvider());
v.setInput(createModel());
v.setComparator(new ViewerComparator(){
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
*/
@Override
public int compare(Viewer viewer, Object e1, Object e2) {
return ((MyModel)e1).compareTo((MyModel) e2);
}
});
}
private MyModel createModel() {
MyModel root = new MyModel(0,null);
root.counter = 0;
MyModel tmp;
for( int i = 1; i < 10; i++ ) {
tmp = new MyModel(i, root);
root.child.add(tmp);
for( int j = 1; j < i; j++ ) {
MyModel e = new MyModel(j,tmp);
tmp.child.add(e);
for( int k = 1; k < i; k++ ) {
MyModel e1 = new MyModel(k,e);
e.child.add(e1);
}
}
}
return root;
}
public static void main(String[] args) {
Display display = new Display ();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new Snippet002TreeViewer(shell);
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
}
}
---------------------
why, mr. Anderson, why, why do you persist?
Because I Choose To.
Regards,
Vijay
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