// レアイウトする
HorizontalPanel lowerPanel = new HorizontalPanel();
lowerPanel.setBackgroundColor(Color.black, 0.0f, HorizontalPanel.DEFAULT_STATUS_PANEL_END_ALPHA);
//lowerPanel.setTopLineAlpha(0.5f);
lowerPanel.setPanelHeight(32);
lowerPanel.addGlue();
lowerPanel.add(cancelButton);
lowerPanel.add(okButton);
dialog.add(editor, BorderLayout.CENTER);
dialog.add(lowerPanel, BorderLayout.SOUTH);