org.eclipse.swt.snippets.Snippet80.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet80.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Lars Vogel <Lars.Vogel@vogella.com> - Bug 502845
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * Tree example snippet: limit selection to items that match a pattern
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */

import static org.eclipse.swt.events.SelectionListener.*;

import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet80 {

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Snippet 80");
        shell.setLayout(new FillLayout());
        final Tree tree = new Tree(shell, SWT.BORDER | SWT.MULTI);
        for (int i = 0; i < 2; i++) {
            TreeItem item = new TreeItem(tree, SWT.NONE);
            item.setText("item " + i);
            for (int j = 0; j < 2; j++) {
                TreeItem subItem = new TreeItem(item, SWT.NONE);
                subItem.setText("item " + j);
                for (int k = 0; k < 2; k++) {
                    TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
                    subsubItem.setText("item " + k);
                }
            }
        }

        tree.addSelectionListener(widgetSelectedAdapter(e -> {
            TreeItem[] selection = tree.getSelection();
            TreeItem[] revisedSelection = new TreeItem[0];
            for (int i = 0; i < selection.length; i++) {
                String text = selection[i].getText();
                if (text.indexOf('1') > 0) {
                    TreeItem[] newSelection = new TreeItem[revisedSelection.length + 1];
                    System.arraycopy(revisedSelection, 0, newSelection, 0, revisedSelection.length);
                    newSelection[revisedSelection.length] = selection[i];
                    revisedSelection = newSelection;
                }
            }
            tree.setSelection(revisedSelection);
        }));

        shell.setSize(300, 300);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}