The treeview browser is the left panel of VDAT. Each night of observation in the redux/ directory is displayed. Underneath you can select different calibration (arc and flat), science or bias (zero) images. Which is selected is then used as the target of all the other VDAT commands. You can also click on the tick box next the calibration and bias directories, to select that directory to be used as calibration for the rest of the reduction.
The main panel is the central panel of VDAT that displays an image of the focal plane. What is displayed depends on the type of file selected in the treeview browser. When there are OFU widgets in this panel they can be hovered over, to display the IFUID and IFUSLOTID. IFUs can be selected and deselected by left clicking. Any commands clicked on the buttons menu only act on the selected IFUs. The IFU widgets can lso be double clicked to load an IFU viewer.
The IFU viewer is window that displays detailed information about a particular IFU. It is loaded when an IFU widget in the main panel is double-clicked
The tabs.yml file in the configuration directory controls what is displayed in the IFU viewer and the main panel. This configuration is written in YAML. Note that YAML is sensitive to the indentation. What configuration is used depends on the type of selected folder, the different configurations are under the heading zro, cal, sci.
The IFU viewer that pops up when you double click an IFU is configured using the ifu_viewer subsection under each of the zro, cal, sci directory types. The section header_keys gives a list of header keys to display in the bottom panel of the IFU viewer, these header keys are extracted from the header of the currently in focus file. The tabs section descibes each of the tabs on the IFU viewer. The format is:
tabs: &fcommon
raw: # name of the tab
regex: '[0-9]*_{ihmpid}{channel}{amp}_*.fits' # regular expression used to find the files
channel: ['L', 'R'] # channels to loop over
amp: ['U', 'L'] # amplifiers to loop over
#order of channel and amp determines position in window
The IFU viewer creates a tab and fills it with a grid of Ginga fits viewers. The grid dimensions depend on which channels and amps are present (if any), i.e is you have L, R channels and U, L amps like in the example above, you get a 2x2 grid.
You can have different tabs for different types of directory simply by have different configurations in the tabs: section.
The configuration for the main panel for each type can be found under the main: subsections of the YAML file.