PyEpics extension: PVImage object

[vstadnytskyi]

PVImage object is a dynamically changing bitmap based on the value of the corresponding PV. The PV is transmitted as a 1-D array and needs to be reconstructed to a bitmap. Currently, the size of the image has to be hard coded.

• update the code to include an auxiliary size PV that tells the size of the bitmap so the PVImage can reshape the bitmap represented as 1-D array into whatever shape needed.

[vstadnytskyi]

Look at icarus_nmr.pyepics.PVToogleButton or pyepics.wx.PVButton class in pyepics to learn how to pass 2 or more PVs into each GUI object. This could be quite useful in constructing complex graphical objects.