org.eclipse.swt.snippets.Snippet193.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet193.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
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * Tree example snippet: allow user to reorder columns by dragging and programmatically.
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.2
 */
import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet193 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 193");
        shell.setLayout(new RowLayout(SWT.HORIZONTAL));
        final Tree tree = new Tree(shell, SWT.BORDER | SWT.CHECK);
        tree.setLayoutData(new RowData(-1, 300));
        tree.setHeaderVisible(true);
        TreeColumn column = new TreeColumn(tree, SWT.LEFT);
        column.setText("Column 0");
        column = new TreeColumn(tree, SWT.CENTER);
        column.setText("Column 1");
        column = new TreeColumn(tree, SWT.LEFT);
        column.setText("Column 2");
        column = new TreeColumn(tree, SWT.RIGHT);
        column.setText("Column 3");
        column = new TreeColumn(tree, SWT.CENTER);
        column.setText("Column 4");
        for (int i = 0; i < 5; i++) {
            TreeItem item = new TreeItem(tree, SWT.NONE);
            String[] text = new String[] { i + ":0", i + ":1", i + ":2", i + ":3", i + ":4" };
            item.setText(text);
            for (int j = 0; j < 5; j++) {
                TreeItem subItem = new TreeItem(item, SWT.NONE);
                text = new String[] { i + "," + j + ":0", i + "," + j + ":1", i + "," + j + ":2",
                        i + "," + j + ":3", i + "," + j + ":4" };
                subItem.setText(text);
                for (int k = 0; k < 5; k++) {
                    TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
                    text = new String[] { i + "," + j + "," + k + ":0", i + "," + j + "," + k + ":1",
                            i + "," + j + "," + k + ":2", i + "," + j + "," + k + ":3",
                            i + "," + j + "," + k + ":4" };
                    subsubItem.setText(text);
                }
            }
        }
        Listener listener = e -> System.out.println("Move " + e.widget);
        TreeColumn[] columns = tree.getColumns();
        for (int i = 0; i < columns.length; i++) {
            columns[i].setWidth(100);
            columns[i].setMoveable(true);
            columns[i].addListener(SWT.Move, listener);
        }
        Button b = new Button(shell, SWT.PUSH);
        b.setText("invert column order");
        b.addListener(SWT.Selection, e -> {
            int[] order = tree.getColumnOrder();
            for (int i = 0; i < order.length / 2; i++) {
                int temp = order[i];
                order[i] = order[order.length - i - 1];
                order[order.length - i - 1] = temp;
            }
            tree.setColumnOrder(order);
        });
        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}