src/apps/patchbay/MidiEventMeter.h

   1 /* MidiEventMeter.h
   2  * ----------------
   3  * A UI widget that measures the amount of MIDI data generated by a
   4  * consumer.
   5  *
   6  * Copyright 2013, Haiku, Inc. All rights reserved.
   7  * Distributed under the terms of the MIT License.
   8  *
   9  * Revisions by Pete Goodeve
  10  *
  11  * Copyright 1999, Be Incorporated.   All Rights Reserved.
  12  * This file may be used under the terms of the Be Sample Code License.
  13  */
  14 #ifndef MIDIEVENTMETER_H
  15 #define MIDIEVENTMETER_H
  16
  17 #include <Point.h>
  18 #include <Rect.h>
  19
  20 class BMidiProducer;
  21 class CountEventConsumer;
  22 class BView;
  23
  24 class MidiEventMeter
  25 {
  26 public:
  27         MidiEventMeter(int32 producerID);
  28         ~MidiEventMeter();
  29
  30         void Pulse(BView* view);
  31         BRect Bounds() const;
  32         void Draw(BView* view);
  33
  34 private:
  35         int32 CalcMeterLevel(int32 eventCount) const;
  36
  37         CountEventConsumer* fCounter;
  38         int32 fMeterLevel;
  39 };
  40
  41 #endif /* MIDIEVENTMETER_H */