package org.eclipse.nebula.snippets.ganttchart;

/*******************************************************************************
 * Copyright (c) Emil Crumhorn - Hexapixel.com - emil.crumhorn@gmail.com
 *
 * 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:
 *    emil.crumhorn@gmail.com - initial API and implementation
 *******************************************************************************/

import java.util.Calendar;

import org.eclipse.nebula.widgets.ganttchart.ColorCache;
import org.eclipse.nebula.widgets.ganttchart.GanttChart;
import org.eclipse.nebula.widgets.ganttchart.GanttEvent;
import org.eclipse.nebula.widgets.ganttchart.GanttSection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;

/**
 * This example shows how create GanttSections and also shows it's possible to connect cross-section events (even if the line gets overdrawn in the divider). It also shows reverse
 * dependency connections and a custom menu item on the checkpoint. Sections are drawn mostly as overlays but allow for extra settings such as fixed heights and so on. <br>
 * <br>
 * Do note that if sections are used, and there are events that have not been added to a section, they will not be drawn.
 * 
 */
public class GanttSectionExample {

	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setText("Gantt Chart - Gantt Sections Example");
		shell.setSize(600, 500);
		shell.setLayout(new FillLayout());

		// create chart
		GanttChart ganttChart = new GanttChart(shell, SWT.NONE);

		// create scope
		GanttEvent scopeEvent = new GanttEvent(ganttChart, "Scope");

		// create some dates for our events
		Calendar sdEventOne = Calendar.getInstance();
		Calendar edEventOne = Calendar.getInstance();
		edEventOne.add(Calendar.DATE, 10);

		Calendar rsEventOne = Calendar.getInstance();
		Calendar reEventOne = Calendar.getInstance();
		rsEventOne.add(Calendar.DATE, -5);
		reEventOne.add(Calendar.DATE, 5);

		// create event 1 with custom colors
		GanttEvent eventOne = new GanttEvent(ganttChart, "Event 1", sdEventOne, edEventOne, rsEventOne, reEventOne, 35);
		eventOne.setStatusColor(ColorCache.getColor(70, 132, 96));
		eventOne.setGradientStatusColor(ColorCache.getColor(160, 210, 181));

		Calendar sdEventTwo = Calendar.getInstance();
		Calendar edEventTwo = Calendar.getInstance();
		sdEventTwo.add(Calendar.DATE, 11);
		edEventTwo.add(Calendar.DATE, 15);
		// create event 2 with custom colors
		GanttEvent eventTwo = new GanttEvent(ganttChart, "Event 2", sdEventTwo, edEventTwo, 10);
		eventTwo.setStatusColor(ColorCache.getColor(81, 104, 145));
		eventTwo.setGradientStatusColor(ColorCache.getColor(168, 185, 216));

		Calendar chkStartAndEnd = Calendar.getInstance();
		chkStartAndEnd.add(Calendar.DATE, 16);
		GanttEvent eventCheckpoint = new GanttEvent(ganttChart, "Checkpoint", chkStartAndEnd, chkStartAndEnd, 75);
		eventCheckpoint.setCheckpoint(true);

		// create a custom menu item on the checkpoint
		MenuItem testItem = new MenuItem(eventCheckpoint.getMenu(), SWT.PUSH);
		testItem.setText("I am a custom event menu item!");
		testItem.addListener(SWT.Selection, new Listener() {
			public void handleEvent(Event event) {
				System.out.println("You clicked the custom event");
			}
		});

		// create sections, each one with a different color
		GanttSection gs = new GanttSection(ganttChart, "Section One");
		// tell this section what events belong to it
		gs.addGanttEvent(scopeEvent);
		gs.addGanttEvent(eventOne);
		gs.addGanttEvent(eventTwo);

		GanttSection gs2 = new GanttSection(ganttChart, "Section Two");
		// change the color to make it stand out, the bottom gradient will be pulled from settings (as will all other colors unless they are set)
		gs2.setWeekdayBackgroundColorTop(ColorCache.getColor(242, 231, 215));
		gs2.addGanttEvent(eventCheckpoint);

		GanttSection gs3 = new GanttSection(ganttChart, "Section Three");
		gs3.setWeekdayBackgroundColorTop(ColorCache.getColor(242, 215, 235));

		GanttSection gs4 = new GanttSection(ganttChart, "Section Four");
		gs4.setWeekdayBackgroundColorTop(ColorCache.getColor(215, 242, 222));

		// add loads of connections from everything to everything (pretty much) that even cross over sections and are reverse in dependencies as well.
		ganttChart.addConnection(eventOne, eventTwo);
		ganttChart.addConnection(eventTwo, eventOne);
		ganttChart.addConnection(eventOne, eventCheckpoint);
		ganttChart.addConnection(eventTwo, eventCheckpoint);

		ganttChart.addConnection(scopeEvent, eventOne);
		ganttChart.addConnection(scopeEvent, eventTwo);
		ganttChart.addConnection(scopeEvent, eventCheckpoint);

		ganttChart.addConnection(eventCheckpoint, scopeEvent);
		ganttChart.addConnection(eventCheckpoint, eventTwo);
		ganttChart.addConnection(eventCheckpoint, eventOne);

		// tell the scope what events belong to us. Note again that we add a cross-section event to the scope, which is possible but most likely illogical.
		scopeEvent.addScopeEvent(eventOne);
		scopeEvent.addScopeEvent(eventTwo);
		scopeEvent.addScopeEvent(eventCheckpoint);

		shell.open();

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