InteractionSystem

Goal

Reference : https://trac.videolan.org/vlc/ticket/27

The goal is to implement a system to:

• Alert the user of critical errors (cannot play file). Should be blocking.
• Ask the user a question
  • Are you sure?
  • Try to Fix index of avi?
  • Overwrite File ?
• Inform the user, without disturbing him. (Buffering stream). This might require a displaytime or something. Because how do we know how long this information should be displayed? Also think of buffering 0-100%
• present a user/passwd dialog when we get an authentication failure on a stream.

Roadmap

Scheduled for implementation in 0.8.5

Some work will have to be done in all interfaces

Objects architecture

• Interaction object
  • void * pointer for interface specific stuff

• Widget object
  • for input, associated with a vlc_value_t

• Interaction manager
  • Maintains a list of currently active interaction displays
  • When a new interaction is requested, forward the request to the interface (ASYNCHRONOUS !)
  • Asks the interface to show/modify/remove a display
  • Active polling ?

• Signalling the interface :
  • function pointer
    • easier to know if interface does not support
  • variable
    • cleaner ?
  • "control" function

• Requester
  • Builds the interaction object
  • Add it to the interaction manager request queue.
    • Queue or single with lock ?
    • Analyze deadlock possibility