Classes/NJOutputMouseScroll.m

   1 //
   2 //  NJOutputMouseScroll.m
   3 //  Enjoy
   4 //
   5 //  Created by Yifeng Huang on 7/28/12.
   6 //
   7
   8 #import "NJOutputMouseScroll.h"
   9
  10 @implementation NJOutputMouseScroll
  11
  12 + (NSString *)serializationCode {
  13     return @"mouse scroll";
  14 }
  15
  16 - (NSDictionary *)serialize {
  17     return @{ @"type": self.class.serializationCode,
  18               @"direction": @(_direction),
  19               @"speed": @(_speed),
  20               @"smooth": @(_smooth),
  21               };
  22 }
  23
  24 + (NJOutput *)outputDeserialize:(NSDictionary *)serialization
  25                   withMappings:(id <NSFastEnumeration>)mappings {
  26     NJOutputMouseScroll *output = [[NJOutputMouseScroll alloc] init];
  27     output.direction = [serialization[@"direction"] intValue];
  28     output.speed = [serialization[@"speed"] floatValue];
  29     output.smooth = [serialization[@"smooth"] boolValue];
  30     return output;
  31 }
  32
  33 - (BOOL)isContinuous {
  34     return _smooth;
  35 }
  36
  37 - (int)wheel:(int)n {
  38     int amount =  abs(_direction) == n ? _direction / n : 0;
  39     if (self.smooth)
  40         amount *= _speed * self.magnitude;
  41     return amount;
  42 }
  43
  44 - (void)trigger {
  45     if (!_smooth) {
  46         CGEventRef scroll = CGEventCreateScrollWheelEvent(NULL,
  47                                                           kCGScrollEventUnitLine,
  48                                                           2,
  49                                                           [self wheel:1],
  50                                                           [self wheel:2]);
  51         CGEventPost(kCGHIDEventTap, scroll);
  52         CFRelease(scroll);
  53     }
  54 }
  55
  56 - (BOOL)update:(NJDeviceController *)jc {
  57     if (self.magnitude < 0.05f)
  58         return NO; // dead zone
  59
  60     CGEventRef scroll = CGEventCreateScrollWheelEvent(NULL,
  61                                                       kCGScrollEventUnitPixel,
  62                                                       2,
  63                                                       [self wheel:1],
  64                                                       [self wheel:2]);
  65     CGEventPost(kCGHIDEventTap, scroll);
  66     CFRelease(scroll);
  67
  68     return YES;
  69 }
  70
  71 @end