iokit/Families/IOHIDSystem/IOHITablet.cpp

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 #include <IOKit/hidsystem/IOHITablet.h>
  23 #include <IOKit/hidsystem/IOHITabletPointer.h>
  24
  25 OSDefineMetaClassAndStructors(IOHITablet, IOHIPointing);
  26
  27 UInt16 IOHITablet::generateTabletID()
  28 {
  29     static UInt16 _nextTabletID = 0;
  30     return _nextTabletID++;
  31 }
  32
  33 bool IOHITablet::init(OSDictionary *propTable)
  34 {
  35     if (!IOHIPointing::init(propTable)) {
  36         return false;
  37     }
  38
  39     _systemTabletID = generateTabletID();
  40     setProperty(kIOHISystemTabletID, (unsigned long long)_systemTabletID, 16);
  41
  42     return true;
  43 }
  44
  45 bool IOHITablet::open(IOService *client,
  46                       IOOptionBits options,
  47                       RelativePointerEventAction        rpeAction,
  48                       AbsolutePointerEventAction        apeAction,
  49                       ScrollWheelEventAction            sweAction,
  50                       TabletEventAction                         tabletAction,
  51                       ProximityEventAction                      proximityAction)
  52 {
  53     if (!IOHIPointing::open(client, options, rpeAction, apeAction, sweAction)) {
  54         return false;
  55     }
  56
  57     _tabletEventTarget = client;
  58     _tabletEventAction = tabletAction;
  59     _proximityEventTarget = client;
  60     _proximityEventAction = proximityAction;
  61
  62     return true;
  63 }
  64
  65 void IOHITablet::dispatchTabletEvent(NXEventData *tabletEvent,
  66                                      AbsoluteTime ts)
  67 {
  68     if (_tabletEventAction) {
  69         (*_tabletEventAction)(_tabletEventTarget,
  70                             tabletEvent,
  71                             ts);
  72     }
  73 }
  74
  75 void IOHITablet::dispatchProximityEvent(NXEventData *proximityEvent,
  76                                         AbsoluteTime ts)
  77 {
  78     if (_proximityEventAction) {
  79         (*_proximityEventAction)(_proximityEventTarget,
  80                                proximityEvent,
  81                                ts);
  82     }
  83 }
  84
  85 bool IOHITablet::startTabletPointer(IOHITabletPointer *pointer, OSDictionary *properties)
  86 {
  87     bool result = false;
  88
  89     do {
  90         if (!pointer)
  91             break;
  92
  93         if (!pointer->init(properties))
  94             break;
  95
  96         if (!pointer->attach(this))
  97             break;
  98
  99         if (!pointer->start(this))
 100             break;
 101
 102         result = true;
 103     } while (false);
 104
 105     return result;
 106 }
 107