net.bhl.cdt.paxelerate.util.toOpenCDT.ProgressHandler.java Source code

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Here is the source code for net.bhl.cdt.paxelerate.util.toOpenCDT.ProgressHandler.java

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/*******************************************************************************
 * <copyright> Copyright (c) 2014-2016 Bauhaus Luftfahrt e.V.. All rights reserved. This program and the accompanying
 * materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html </copyright>
 ***************************************************************************************/
package net.bhl.cdt.paxelerate.util.toOpenCDT;

import java.awt.Dimension;
import java.awt.Toolkit;

import org.eclipse.jface.dialogs.ProgressIndicator;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

/**
 * The Class ProgressHandler.
 * 
 * @author marc.engelmann
 * @version 1.0
 * @since 0.5
 */
public class ProgressHandler {

    /** The display. */
    private Display display;

    /** The shell. */
    private Shell shell;

    /** The indicator. */
    private ProgressIndicator indicator;

    /** The current. */
    private int current;

    /** The label. */
    private Label label;

    /**
     * Report progress.
     *
     * @param value
     *            the value
     */
    public void reportProgress(int value) {
        indicator.worked(result(value));
        spin(display);
    }

    /**
     * Result.
     *
     * @param value
     *            the value
     * @return the int
     */
    private int result(int value) {
        int difference = Math.abs(current - value);

        if (difference != 0) {
            current = value;
        }
        return difference;
    }

    /**
     * Done.
     */
    public void done() {
        indicator.done();
        display.dispose();
    }

    /**
     * Update text.
     *
     * @param text
     *            the text
     */
    public void updateText(String text) {
        label.setText(text);
    }

    /**
     * Instantiates a new progress handler.
     *
     * @param max
     *            the max
     */
    public ProgressHandler(int max) {

        current = 0;

        display = new Display();
        shell = new Shell(display);
        shell.setLayout(new GridLayout());
        shell.setSize(500, 100);
        shell.setText("Boarding Simulation - Preparations in Progress.");

        indicator = new ProgressIndicator(shell, SWT.HORIZONTAL);
        indicator.setLayoutData(new GridData(SWT.FILL, SWT.NONE, true, false));
        indicator.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_CYAN));

        label = new Label(shell, SWT.NONE);
        label.setText("The boarding paths for the passengers are being calculated ...");

        shell.open();

        Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
        int x = (int) ((dimension.getWidth() - shell.getSize().x) / 2);
        int y = (int) ((dimension.getHeight() - shell.getSize().y) / 2);
        shell.setLocation(x, y);

        indicator.beginTask(max);
        indicator.showNormal();
    }

    /**
     * Spin.
     *
     * @param display
     *            the display
     */
    private static void spin(Display display) {
        long endTime = System.currentTimeMillis() + 10;
        while (System.currentTimeMillis() < endTime)
            display.readAndDispatch();

    }
}