Features and Usage
==================

Main Features
-------------

.. image:: images/annotated_screenshot.png
   :width: 1000

The main elements of the ACA View display are shown in the figure above:

- **A** - Timeline navigation toolbar. Note the different items, from left to right and top to bottom:

  - **Play backward**.
  - **Step backward**.
  - **Pause**.
  - **Step forward**.
  - **Play forward**.
  - **Load data**. When clicked, a dialog opens to choose data to load.
  - **Show telemetry**. When clicked, the default view appears.
  - **Show python interpreter**. When clicked, and interactive IPython interpreter appears.
  - **Sampling time box**. This value determines the size of the time step.
  - **Time slider and progress bar**. The slider can be used to move backward/forward along the data timeline.
    The Progress bar displays the fraction of data already loaded.

- **B** - Image telemetry display. Note the features:

  - image shape outline corresponds to image type
  - dark cal is shown around image
  - centroids are displayed

- **C** - General Info display

  - **Limit checking**. Departures from expected levels are marked in yellow/red
  - GLBSTAT entry is a string code. If you hover the mouse over the corresponding box, you will see a list of all codes.

- **D** - Slot info display

  - **Limit checking**. Departures from expected levels are marked in yellow/red
  - IMGSTAT entry is a string code. If you hover the mouse over the corresponding box, you will see a list of all codes.

- **E** - Event list. Events currently include only commands.

Loading Data
------------

If you click the *Load data* button, the following dialog will appear. Hopefully it is self explanatory.

.. image:: images/data_dialog.png
   :width: 300


IPython Interpreter
-------------------

If you click the *Python interpreter* button, the following will appear.

.. image:: images/python_interpreter.png
   :width: 1000