eu.future.earth.gwt.client.date.week.staend.DayPanelDropController Maven / Gradle / Ivy

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/*
 * Copyright 2007 Future Earth, [email protected]
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package eu.future.earth.gwt.client.date.week.staend;

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

import com.allen_sauer.gwt.dnd.client.DragContext;
import com.allen_sauer.gwt.dnd.client.drop.SimpleDropController;
import com.google.gwt.user.client.ui.Widget;

import eu.future.earth.gwt.client.date.DateRenderer;
import eu.future.earth.gwt.client.date.DateUtils;
import eu.future.earth.gwt.client.date.week.WeekPanel;

/**
 * DropController which allows a widget to be dropped on a SimplePanel drop target when the drop target does not yet
 * have a child widget.
 */
public class DayPanelDropController extends SimpleDropController {
	private Calendar helper = new GregorianCalendar(); // NOPMD;

	private WeekPanel week = null;

	public DayPanelDropController(DayPanel newDropTarget, WeekPanel newWeek) {
		super(newDropTarget);
		week = newWeek;
	}

	public void onDrop(DragContext context) {
		final Widget drp = getDropTarget();
		if (drp != null) {
			final Widget drag = context.draggable;
			if (drp instanceof DayPanel && drag instanceof DayField) {
				@SuppressWarnings("unchecked")
				final DayPanel parent = (DayPanel) drp;

				@SuppressWarnings("unchecked")
				final DayField data = (DayField) drag;
				long duration = data.getEnd().getTime() - data.getStart().getTime();

				DateRenderer renderer = parent.getRenderer();

				int y = context.draggable.getAbsoluteTop() - week.getTopScrollable();
				if (y < 0) {
					y = 0;
				}

				y = y + (renderer.getStartHour() * renderer.getIntervalsPerHour() * renderer.getIntervalHeight());

				helper.setTime(data.getStart());
				// zero out time, keeping the date
				helper.set(Calendar.HOUR_OF_DAY, 0);
				helper.set(Calendar.MINUTE, 0);
				helper.set(Calendar.SECOND, 0);
				helper.set(Calendar.MILLISECOND, 0);
				// now add however many minutes the nearest interval represents
				helper.add(Calendar.MINUTE, (parent.calculateIntervalSnapForY(y)) * (60 / renderer.getIntervalsPerHour()));

				Date dropOn = parent.getDate();
				boolean sameDay = DateUtils.isSameDay(dropOn, data.getStart());
				if (!sameDay) {
					Calendar migrate = new GregorianCalendar(); // NOPMD;
					migrate.setTime(dropOn);
					helper.set(Calendar.YEAR, migrate.get(Calendar.YEAR));
					helper.set(Calendar.MONTH, migrate.get(Calendar.MONTH));
					helper.set(Calendar.DAY_OF_MONTH, migrate.get(Calendar.DAY_OF_MONTH));
				}
				data.setStart(helper.getTime());
				data.setEndTime(new Date(data.getStart().getTime() + duration));
				parent.addEventDrop(data, sameDay);
			}
			super.onDrop(context);
		}

	}
}