Main problems

  • Currently when digitizer crashes, the whole GUI also crashes.
    • Caused by the bad handling of the memory by digitizer or...?
    • Requires complete re-design of vector digitizer.

Requested functionality

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Proposal: Use pygrass

Use pygrass to access vectors.

Basic usage

  • possibly better and easier memory handling
  • will improve also pygrass
  • avoids code duplication (some interface would be needed for digitizer anyway)

Solving the crashing in the future

  1. use pygrass
  2. use factory design pattern
    • create objects using factory
    • everyone expects the interface provided by pygrass
  3. create new set of classes with the same interface as pygrass
    • these classes are using modules and not library calls
    • other implementations are also possible
  4. replace old factory with the new creating new classes
  5. it is possible to switch between these two ways dynamically
Last modified 11 years ago Last modified on Feb 6, 2013, 8:42:32 AM
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