ClockView.java

/*
 * Copyright (c) 2016, Alex Blewitt, Bandlem Ltd
 * Copyright (c) 2016, Packt Publishing Ltd
 *
 * 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
 */
package com.packtpub.e4.clock.ui.views;

import java.time.ZoneId;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.ViewPart;

import com.packtpub.e4.clock.ui.ClockWidget;

public class ClockView extends ViewPart {
	private Combo timeZones;

	public void createPartControl(Composite parent) {
		Object[] objects = parent.getDisplay().getDeviceData().objects;
		int count = 0;
		for (int i = 0; i < objects.length; i++) {
			if (objects[i] instanceof Color) {
				count++;
			}
		}
		System.err.println("There are " + count + " Color instances");
		RowLayout layout = new RowLayout(SWT.HORIZONTAL);
		parent.setLayout(layout);
		final ClockWidget clock1 = new ClockWidget(parent, SWT.NONE, new RGB(255, 0, 0));
		final ClockWidget clock2 = new ClockWidget(parent, SWT.NONE, new RGB(0, 255, 0));
		final ClockWidget clock3 = new ClockWidget(parent, SWT.NONE, new RGB(0, 0, 255));
		clock1.setLayoutData(new RowData(20, 20));
		clock2.setLayoutData(new RowData(50, 50));
		clock3.setLayoutData(new RowData(100, 100));
		timeZones = new Combo(parent, SWT.DROP_DOWN);
		timeZones.setVisibleItemCount(5);
		for (String zone : ZoneId.getAvailableZoneIds()) {
			timeZones.add(zone);
		}
		timeZones.addSelectionListener(new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
				String id = timeZones.getText();
				clock3.setZone(ZoneId.of(id));
				clock3.redraw();
			}

			public void widgetDefaultSelected(SelectionEvent e) {
				clock3.setZone(ZoneId.systemDefault());
				clock3.redraw();
			}
		});
	}

	public void setFocus() {
		timeZones.setFocus();
	}
}