@Override
  public JComponent getContent() {

    if (this.obj == null) {

      throw new IllegalStateException("No object set.");
    }

    // TODO: Make this nicer later.
    if (this.obj instanceof Chapter) {

      Chapter c = (Chapter) this.obj;

      JComponent t = UIUtils.getChapterInfoPreview(c, null, this.viewer);

      if (t == null) {

        // May be a fake chapter, return null.
        return null;
      }

      t.setSize(new Dimension(300, Short.MAX_VALUE));

      return t;

    } else {

      String firstLine = "<b><i>No description.</i></b>";

      String t = (obj.getDescription() != null ? obj.getDescription().getText() : null);

      if ((t != null) && (t.length() > 0)) {

        firstLine = new Paragraph(t, 0).getFirstSentence().getText();
      }

      JEditorPane desc = UIUtils.createHelpTextPane(firstLine, null);

      FormLayout fl = new FormLayout("380px", "p");

      PanelBuilder pb = new PanelBuilder(fl);

      CellConstraints cc = new CellConstraints();

      pb.add(desc, cc.xy(1, 1));

      desc.setAlignmentX(Component.LEFT_ALIGNMENT);

      JPanel p = pb.getPanel();
      p.setOpaque(true);
      p.setBackground(UIUtils.getComponentColor());

      return p;
    }
  }