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===== Model-View-Controller =====

The x0x c0ntr0l application employs the model-view-controller (MVC)
paradigm for application design.  This three tier approach seperates
the graphical user interface (the view) from the mechanics of the
application such as the serial ports, data storage on disk and
application logic (the model).  The controller is the interface
between the object and the view.  Messages between the model and view
must pass through the controller.  These messages must adhere to
the specifications listed in this document.

==== Model <-> Controller Interface ====

=== The view can ask the model to: ===

  * openSerialPort()  # Perhaps these happen automatically??
  * closeSerialPort()
  * selectSerialPort(PORT)
  * writepattern(PATTERN, BANK, LOC)
  * readPattern(BANK, LOC)
  * backupAllPatterns(TOFILE)
  * restoreAllPatterns(FROMFILE)
  * sendRunStop()
  * setCurrentBank(BANK)
  * setCurrentLoc(LOC)
  * setTempo(TEMPO)
  * setSync(SYNC)


=== The model can ask the view to: ===

  * updateSerialStatus(STATE)
  * updateSelectedSerialPort(PORT)
  * updateSerialPortName(PORT,NAME)
  * updateCurrentPattern(PATTERN)
  * updateLoc(LOC)
  * updateBank(BANK)
  * updateTempo(TEMPO)
  * updateSync(SYNC)
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