src/servers/app/InputManager.cpp

   1 /*
   2  * Copyright 2005, Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Axel Dörfler, axeld@pinc-software.de
   7  */
   8
   9 // TODO: introduce means to define event stream features (like local vs. net)
  10 // TODO: introduce the possibility to identify a stream by a unique name
  11
  12
  13 #include "EventStream.h"
  14 #include "InputManager.h"
  15
  16 #include <Autolock.h>
  17
  18
  19 InputManager* gInputManager;
  20         // the global input manager will be created by the AppServer
  21
  22
  23 InputManager::InputManager()
  24         : BLocker("input manager"),
  25         fFreeStreams(2, true),
  26         fUsedStreams(2, true)
  27 {
  28 }
  29
  30
  31 InputManager::~InputManager()
  32 {
  33 }
  34
  35
  36 bool
  37 InputManager::AddStream(EventStream* stream)
  38 {
  39         BAutolock _(this);
  40         return fFreeStreams.AddItem(stream);
  41 }
  42
  43
  44 void
  45 InputManager::RemoveStream(EventStream* stream)
  46 {
  47         BAutolock _(this);
  48         fFreeStreams.RemoveItem(stream);
  49 }
  50
  51
  52 EventStream*
  53 InputManager::GetStream()
  54 {
  55         BAutolock _(this);
  56
  57         EventStream* stream = NULL;
  58         do {
  59                 delete stream;
  60                         // this deletes the previous invalid stream
  61
  62                 stream = fFreeStreams.RemoveItemAt(0);
  63         } while (stream != NULL && !stream->IsValid());
  64
  65         if (stream == NULL)
  66                 return NULL;
  67
  68         fUsedStreams.AddItem(stream);
  69         return stream;
  70 }
  71
  72
  73 void
  74 InputManager::PutStream(EventStream* stream)
  75 {
  76         if (stream == NULL)
  77                 return;
  78
  79         BAutolock _(this);
  80
  81         fUsedStreams.RemoveItem(stream, false);
  82         if (stream->IsValid())
  83                 fFreeStreams.AddItem(stream);
  84         else
  85                 delete stream;
  86 }
  87
  88
  89 void
  90 InputManager::UpdateScreenBounds(BRect bounds)
  91 {
  92         BAutolock _(this);
  93
  94         for (int32 i = fUsedStreams.CountItems(); i-- > 0;) {
  95                 fUsedStreams.ItemAt(i)->UpdateScreenBounds(bounds);
  96         }
  97
  98         for (int32 i = fFreeStreams.CountItems(); i-- > 0;) {
  99                 fFreeStreams.ItemAt(i)->UpdateScreenBounds(bounds);
 100         }
 101 }
 102
 103