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| Re: Help with ITreePathContentProvider and ItreePathLabelProvider. [message #485585 is a reply to message #485043] |
Sun, 13 September 2009 23:32   |
 Wim Jongman
Messages: 423
Registered: July 2009 |
Senior Member |
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Hi Ali,
This uses a threepathcontentprovider
package org.eclipse.jface.snippets.viewers;
import java.io.File;
import java.util.ArrayList;
import org.eclipse.jface.viewers.ITreePathContentProvider;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
/**
* @author Wim Jongman, Industrial-TSI & Remain
*
*/
public class TreePathSnippet {
public TreePathSnippet(Shell shell) {
shell.setBounds(10, 10, 280, 200);
shell.setLayout(new GridLayout(1, true));
final Composite sc = new Composite(shell, SWT.NONE);
sc.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
sc.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR _WHITE));
sc.setLayout(new GridLayout(1, true));
final TreeViewer v = new TreeViewer(sc, SWT.BORDER);
v.getTree().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
v.setContentProvider(new ITreePathContentProvider() {
public void inputChanged(Viewer viewer, Object oldInput,
Object newInput) {
}
public void dispose() {
}
public Object[] getElements(Object inputElement) {
return (Object[]) inputElement;
}
public boolean hasChildren(TreePath path) {
if (((File) path.getLastSegment()).isDirectory())
return true;
return false;
}
public TreePath[] getParents(Object element) {
ArrayList<File> files = new ArrayList<File>();
File elm = (File) element;
while (elm.getParentFile() != null) {
files.add(elm.getParentFile());
elm = elm.getParentFile();
}
return new TreePath[] { new TreePath(files.toArray()) };
}
public Object[] getChildren(TreePath parentPath) {
return ((File) parentPath.getLastSegment()).listFiles();
}
});
v.setInput(File.listRoots());
}
public static void main(String[] args) {
Display display = new Display();
try {
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new TreePathSnippet(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
} catch (Exception e) {
e.printStackTrace();
}
display.dispose();
}
}
> Hello all,
>
> I'm trying to evaluate the ITreePathContentProvider and
> ItreePathLabelProvider, but haven?t been able to find any examples or get
> them to work with a TreeView using guesswork.
>
> Does anyone know of any good example code that demonstrated a viewer using
> TreePaths?
>
> Ali.
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