org.eclipse.swt.snippets.Snippet107.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet107.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;

/*
 * Sash example snippet: implement a simple splitter (with a 20 pixel limit)
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet107 {

    public static void main(String[] args) {
        Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Snippet 107");
        Button button1 = new Button(shell, SWT.PUSH);
        button1.setText("Button 1");
        final Sash sash = new Sash(shell, SWT.VERTICAL);
        Button button2 = new Button(shell, SWT.PUSH);
        button2.setText("Button 2");

        final FormLayout form = new FormLayout();
        shell.setLayout(form);

        FormData button1Data = new FormData();
        button1Data.left = new FormAttachment(0, 0);
        button1Data.right = new FormAttachment(sash, 0);
        button1Data.top = new FormAttachment(0, 0);
        button1Data.bottom = new FormAttachment(100, 0);
        button1.setLayoutData(button1Data);

        final int limit = 20, percent = 50;
        final FormData sashData = new FormData();
        sashData.left = new FormAttachment(percent, 0);
        sashData.top = new FormAttachment(0, 0);
        sashData.bottom = new FormAttachment(100, 0);
        sash.setLayoutData(sashData);
        sash.addListener(SWT.Selection, e -> {
            Rectangle sashRect = sash.getBounds();
            Rectangle shellRect = shell.getClientArea();
            int right = shellRect.width - sashRect.width - limit;
            e.x = Math.max(Math.min(e.x, right), limit);
            if (e.x != sashRect.x) {
                sashData.left = new FormAttachment(0, e.x);
                shell.layout();
            }
        });

        FormData button2Data = new FormData();
        button2Data.left = new FormAttachment(sash, 0);
        button2Data.right = new FormAttachment(100, 0);
        button2Data.top = new FormAttachment(0, 0);
        button2Data.bottom = new FormAttachment(100, 0);
        button2.setLayoutData(button2Data);

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