+ void setIdAttribute (in string ns, in string name);
+ void getIdAttribute (out string ns, out string name);
+
+ void select (in element_id elem);
+ void unselect (in element_id elem);
+ boolean isSelected (in element_id elem);
+
+ /**
+ * elementRectangle:
+ * @elem: ID of the element
+ * @x: x coordinate of the element
+ * @y: y coordinate of the element
+ * @width: width of the element
+ * @height: height of the element
+ *
+ * Returns the position and the size of the rectangle includes @elem
+ */
+ boolean elementRectangle (in element_id elem,
+ out short x, out short y,
+ out short width, out short height);
+
+ void getSize (out short width, out short height,
+ out short totalWidth, out short totalHeight);
+
+ void getTop (out short x, out short y);
+ void setTop (in short x, in short y);
+
+ void setDefaultFontSize (in short size);
+ short getDefaultFontSize ();
+
+ void setVerbosity (in short level);
+ short getVerbosity ();
+