headers/private/shared/LongAndDragTrackingFilter.h

   1 /*
   2  * Copyright 2009, Alexandre Deckner, alex@zappotek.com
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef LONG_AND_DRAG_TRACKING_FILTER_H
   6 #define LONG_AND_DRAG_TRACKING_FILTER_H
   7
   8
   9 #include <MessageFilter.h>
  10 #include <Point.h>
  11
  12
  13 class BHandler;
  14 class BMessageRunner;
  15
  16
  17 namespace BPrivate {
  18
  19 class LongAndDragTrackingFilter : public BMessageFilter {
  20 public:
  21                                                                 LongAndDragTrackingFilter(
  22                                                                         uint32 longMessageWhat,
  23                                                                         uint32 dragMessageWhat,
  24                                                                         float radiusThreshold = 4.0f,
  25                                                                         bigtime_t durationThreshold = 0);
  26                                                                 ~LongAndDragTrackingFilter();
  27
  28                         filter_result           Filter(BMessage* message, BHandler** target);
  29
  30 private:
  31                         void                            _StopTracking();
  32
  33                         uint32                          fLongMessageWhat;
  34                         uint32                          fDragMessageWhat;
  35                         BMessageRunner*         fMessageRunner;
  36                         BPoint                          fClickPoint;
  37                         uint32                          fClickButtons;
  38                         float                           fSquaredRadiusThreshold;
  39                         bigtime_t                       fDurationThreshold;
  40 };
  41
  42 }       // namespace BPrivate
  43
  44 using BPrivate::LongAndDragTrackingFilter;
  45
  46 #endif  // LONG_AND_DRAG_TRACKING_FILTER_H
  47