(unknown charset) - text selection mode

From: (unknown charset) [at]} <Alexander>
Date: Mon, 9 Jan 2006 14:43:38 +0600

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Hello, everyone! And happy new year!

  I finally found some time (and an interesting example task) to learn
  and use BlackBox (version 1.5). I like its non-modal single-threaded
  design. Cooperative multitasking is great, nothing should block user
  or other objects from performing their job. But I think I see an
  inconsistency in a part of the framework design that should be
  fixed.
  
  Let's try out an example. Start BlackBox. Start a performance
  monitor (standard Windows Task Manager would do). Select any text
  view (like StdLog). Then push and don't release any mouse button.
  Suddenly CPU usage jumps to 100%.
  
  It turns out that there is a tight polling loop in procedure
  TextControllers.StdCtrl.TrackMarks where procedure Ports.Frame.Input
  is repeatedly called until a mouse button is released. This
  behaviour inevitably blocks any background tasks for no good reason
  (and slows down other applications!). This is not the case when you
  are in the middle of a text drag-and-drop operation, which means
  that there is a good way to do the same thing.
  
  Anyone can find the root of this problem by opening a new view,
  holding a mouse button and pressing Ctrl+Break (Win) or
  Command+Option+. (Mac OS).

Alexander.

--- BlackBox
--- send subject HELP or UNSUBSCRIBE to blackbox{([at]})nowhere.xy



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Received on Mon Jan 09 2006 - 09:43:38 UTC