org.eclipse.swt.snippets.Snippet77.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet77.java

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/*******************************************************************************
 * Copyright (c) 2000, 2017 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;

/*
 * Table example snippet: resize columns as table resizes
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet77 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 77");
        shell.setLayout(new FillLayout());

        final Composite comp = new Composite(shell, SWT.NONE);
        final Table table = new Table(comp, SWT.BORDER | SWT.V_SCROLL);
        table.setHeaderVisible(true);
        table.setLinesVisible(true);
        final TableColumn column1 = new TableColumn(table, SWT.NONE);
        column1.setText("Column 1");
        final TableColumn column2 = new TableColumn(table, SWT.NONE);
        column2.setText("Column 2");
        for (int i = 0; i < 10; i++) {
            TableItem item = new TableItem(table, SWT.NONE);
            item.setText(new String[] { "item 0" + i, "item 1" + i });
        }
        comp.addControlListener(ControlListener.controlResizedAdapter(e -> {
            Rectangle area = comp.getClientArea();
            Point size = table.computeSize(SWT.DEFAULT, SWT.DEFAULT);
            ScrollBar vBar = table.getVerticalBar();
            int width = area.width - table.computeTrim(0, 0, 0, 0).width - vBar.getSize().x;
            if (size.y > area.height + table.getHeaderHeight()) {
                // Subtract the scrollbar width from the total column width
                // if a vertical scrollbar will be required
                Point vBarSize = vBar.getSize();
                width -= vBarSize.x;
            }
            Point oldSize = table.getSize();
            if (oldSize.x > area.width) {
                // table is getting smaller so make the columns
                // smaller first and then resize the table to
                // match the client area width
                column1.setWidth(width / 3);
                column2.setWidth(width - column1.getWidth());
                table.setSize(area.width, area.height);
            } else {
                // table is getting bigger so make the table
                // bigger first and then make the columns wider
                // to match the client area width
                table.setSize(area.width, area.height);
                column1.setWidth(width / 3);
                column2.setWidth(width - column1.getWidth());
            }
        }));

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