TGSplash.java

package org.herac.tuxguitar.gui.util;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Shell;
import org.herac.tuxguitar.gui.TuxGuitar;
import org.herac.tuxguitar.gui.editors.TGPainter;
import org.herac.tuxguitar.gui.system.config.TGConfigKeys;

public class TGSplash {

  private static TGSplash instance;

  public static TGSplash instance() {
    if (instance == null) {
      instance = new TGSplash();
    }
    return instance;
  }

  private Shell shell;

  private TGSplash() {
    super();
  }

  public void finish() {
    if (this.shell != null && !this.shell.isDisposed()) {
      this.shell.close();
      this.shell.dispose();
    }
    instance = null;
  }

  private Rectangle getBounds(Image image) {
    Rectangle iBounds = image.getBounds();
    Rectangle mBounds = this.shell.getMonitor().getClientArea();
    int x = (((mBounds.x + mBounds.width) / 2) - (iBounds.width / 2));
    int y = (((mBounds.y + mBounds.height) / 2) - (iBounds.height / 2));
    int width = iBounds.width;
    int height = iBounds.height;
    return new Rectangle(x, y, width, height);
  }

  public void init() {
    if (TuxGuitar.instance().getConfig().getBooleanConfigValue(
        TGConfigKeys.SHOW_SPLASH)) {
      final Image image = TuxGuitar.instance().getIconManager().getAppSplash();

      this.shell = new Shell(TuxGuitar.instance().getDisplay(), SWT.NO_TRIM
          | SWT.NO_BACKGROUND);
      this.shell.setLayout(new FillLayout());
      this.shell.setBounds(getBounds(image));
      this.shell.setImage(TuxGuitar.instance().getIconManager().getAppIcon());
      this.shell.setText(TuxGuitar.APPLICATION_NAME);
      this.shell.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
          TGPainter painter = new TGPainter(e.gc);
          painter.drawImage(image, 0, 0);
        }
      });
      this.shell.open();
      this.shell.redraw();
      this.shell.update();
    }
  }

}