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/*******************************************************************************
* Copyright (c) 2018 Red Hat 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:
* Red Hat - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.tests.gtk.snippets;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
public class Bug92176_TreeScrolling {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("PR");
final Tree tree = new Tree (shell, SWT.BORDER);
tree.setSize (100, 100);
shell.setSize (200, 200);
final TreeItem[] items = new TreeItem[100];
items[0] = new TreeItem(tree, 0);
items[0].setText("elt"+0);
int n = 50;
for (int i = 1; i < n; i++) {
items[i] = new TreeItem(items[i-1], 0);
items[i].setText("child"+i);
}
for (int i = n; i < items.length; i++) {
items[i] = new TreeItem(tree, 0);
items[i].setText("elt "+i);
}
Button button = new Button(shell, SWT.PUSH);
button.setBounds(120,0,50,20);
button.setText("show");
button.addListener(SWT.Selection, new Listener() {
@Override
public void handleEvent(Event e) {
tree.showItem(items[45]);
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
}
}
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