SplashScreen.java

package org.eclipse.buckminster.ui;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

/**
 * Implementation of Splash Screen
 * 
 * @author Karel Brezina
 */
public class SplashScreen {
	private final String CLOSE_TEXT = Messages.splashScreen_splash_will_close_after_X_sec_but_you_can_click_to_close;

	private final Shell splashShell;

	private final Label textLabel;

	public SplashScreen(final Image image, final int closeTimeout, final boolean closeTextFlag, final boolean waitFlag) {
		Display display = Display.getDefault();

		splashShell = new Shell(SWT.ON_TOP);
		splashShell.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseDown(MouseEvent e) {
				splashClose();
			}
		});

		GridLayout gridLayout = new GridLayout(1, false);
		gridLayout.marginHeight = gridLayout.marginWidth = gridLayout.verticalSpacing = 0;
		splashShell.setLayout(gridLayout);
		splashShell.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
		splashShell.setBackgroundMode(SWT.INHERIT_FORCE);

		Label imageLabel = new Label(splashShell, SWT.NONE);
		imageLabel.setImage(image);
		imageLabel.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseDown(MouseEvent e) {
				splashClose();
			}
		});
		imageLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false));

		if (closeTextFlag) {
			Composite textComposite = new Composite(splashShell, SWT.NONE);
			textComposite.setLayout(new GridLayout(1, false));
			textComposite.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false));

			textLabel = new Label(textComposite, SWT.NONE);
			textLabel.setText(String.format(CLOSE_TEXT, Integer.valueOf(closeTimeout)));
			textLabel.addMouseListener(new MouseAdapter() {
				@Override
				public void mouseDown(MouseEvent e) {
					splashClose();
				}
			});
		} else {
			textLabel = null;
		}

		splashShell.pack();

		Rectangle splashRect = splashShell.getBounds();
		Rectangle displayRect = display.getBounds();
		int x = (displayRect.width - splashRect.width) / 2;
		int y = (displayRect.height - splashRect.height) / 2;
		splashShell.setLocation(x, y);

		splashShell.open();

		Thread timer = new Thread(new Runnable() {

			@Override
			public void run() {
				for (int i = closeTimeout; i > 0; i--) {
					if (splashShell.isDisposed()) {
						return;
					}

					if (closeTextFlag) {
						displayClosingText(i);
					}

					try {
						Thread.sleep(1000);
					} catch (InterruptedException e) {
						break;
					}
				}
				splashClose();
			}
		});

		timer.start();

		if (waitFlag) {
			while (!splashShell.isDisposed()) {
				if (!display.readAndDispatch()) {
					display.sleep();
				}
			}
		}
	}

	private void displayClosingText(final int secToClose) {
		if (textLabel == null) {
			return;
		}

		Display.getDefault().asyncExec(new Runnable() {
			@Override
			public void run() {
				textLabel.setText(String.format(CLOSE_TEXT, Integer.valueOf(secToClose)));
			}
		});
	}

	private void splashClose() {
		Display.getDefault().asyncExec(new Runnable() {
			@Override
			public void run() {
				if (!splashShell.isDisposed()) {
					splashShell.close();
					splashShell.dispose();
				}
			}
		});
	}
}