CalendarImpl.java example

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/*
 * Copyright (c) 2010, Michael Grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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package org.jowidgets.spi.impl.swt.common.widgets;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.DateTime;
import org.jowidgets.common.widgets.controller.IInputListener;
import org.jowidgets.spi.impl.controller.InputObservable;
import org.jowidgets.spi.impl.swt.common.image.SwtImageRegistry;
import org.jowidgets.spi.widgets.ICalendarSpi;
import org.jowidgets.spi.widgets.setup.ICalendarSetupSpi;
import org.jowidgets.util.Assert;

public class CalendarImpl extends SwtControl implements ICalendarSpi {

    private final InputObservable inputObservable;

    private Date date;

    public CalendarImpl(final Object parentUiReference, final ICalendarSetupSpi setup, final SwtImageRegistry imageRegistry) {
        super(new DateTime((Composite) parentUiReference, SWT.CALENDAR), imageRegistry);

        this.inputObservable = new InputObservable();

        getUiReference().addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(final SelectionEvent e) {
                final Calendar calendar = new GregorianCalendar();
                calendar.set(Calendar.YEAR, getUiReference().getYear());
                calendar.set(Calendar.MONTH, getUiReference().getMonth());
                calendar.set(Calendar.DAY_OF_MONTH, getUiReference().getDay());
                calendar.set(Calendar.HOUR_OF_DAY, 0);
                calendar.set(Calendar.MINUTE, 0);
                calendar.set(Calendar.SECOND, 0);
                calendar.set(Calendar.MILLISECOND, 0);
                date = calendar.getTime();
                inputObservable.fireInputChanged(date);
            }

        });
    }

    @Override
    public DateTime getUiReference() {
        return (DateTime) super.getUiReference();
    }

    @Override
    public void setDate(final Date date) {
        Assert.paramNotNull(date, "date");
        final Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);
        getUiReference().setDate(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH));
    }

    @Override
    public Date getDate() {
        return date;
    }

    @Override
    public void addInputListener(final IInputListener listener) {
        inputObservable.addInputListener(listener);
    }

    @Override
    public void removeInputListener(final IInputListener listener) {
        inputObservable.removeInputListener(listener);
    }

}