HorizontalLayout dropPane = new HorizontalLayout();
dropPane.setHeight("40px");
dropPane.setWidth("600px");
ImageDropBox dropBox = new ImageDropBox(dropPane, progress);
dropBox.setSizeUndefined();
Panel panel = new Panel(dropBox);
panel.setDescription("Drag content here");
panel.setCaption("Attachments (drag 'n' drop content)");
panel.setStyleName("left-marged");