org.eclipse.swt.snippets.Snippet190.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet190.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;

/*
 * Floating point values in Spinner
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.1
 */

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

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

public class Snippet190 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Spinner with float values");
        shell.setLayout(new GridLayout());
        final Spinner spinner = new Spinner(shell, SWT.NONE);
        // allow 3 decimal places
        spinner.setDigits(3);
        // set the minimum value to 0.001
        spinner.setMinimum(1);
        // set the maximum value to 20
        spinner.setMaximum(20000);
        // set the increment value to 0.010
        spinner.setIncrement(10);
        // set the seletion to 3.456
        spinner.setSelection(3456);
        spinner.addSelectionListener(widgetSelectedAdapter(e -> {
            int selection = spinner.getSelection();
            int digits = spinner.getDigits();
            System.out.println("Selection is " + (selection / Math.pow(10, digits)));
        }));
        shell.setSize(200, 200);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}