+Constructor taking dimenstion information.
+dh\_x, dh\_y are the dimensions when docked horizontally.
+dv\_x, dv\_y are the dimensions when docked vertically.
+f\_x, f\_y are the dimensions when floating.
+For information on isFixed, see comments above.
+horizGap is the left/right gap, separating decorations
+from the bar's actual wndow, filled with the frame's background colour.
+The dimension is given in the frame's coordinates.
+vertGap is the top/bottom gap, separating decorations
+from the bar's actual wndow, filled with the frame's background colour.
+The dimension is given in the frame's coordinates.