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 *)outputWithSerialization:(NSDictionary *)serialization {
  25     NJOutputMouseScroll *output = [[NJOutputMouseScroll alloc] init];
  26     output.direction = [serialization[@"direction"] intValue];
  27     output.speed = [serialization[@"speed"] floatValue];
  28     output.smooth = [serialization[@"smooth"] boolValue];
  29     return output;
  30 }
  31
  32 - (BOOL)isContinuous {
  33     return _smooth;
  34 }
  35
  36 - (int)wheel:(int)n {
  37     int amount =  abs(_direction) == n ? _direction / n : 0;
  38     if (self.smooth)
  39         amount *= _speed * self.magnitude;
  40     return amount;
  41 }
  42
  43 - (void)trigger {
  44     if (!_smooth) {
  45         CGEventRef scroll = CGEventCreateScrollWheelEvent(NULL,
  46                                                           kCGScrollEventUnitLine,
  47                                                           2,
  48                                                           [self wheel:1],
  49                                                           [self wheel:2]);
  50         CGEventPost(kCGHIDEventTap, scroll);
  51         CFRelease(scroll);
  52     }
  53 }
  54
  55 - (BOOL)update:(NJInputController *)ic {
  56     if (self.magnitude < 0.05f)
  57         return NO; // dead zone
  58
  59     CGEventRef scroll = CGEventCreateScrollWheelEvent(NULL,
  60                                                       kCGScrollEventUnitPixel,
  61                                                       2,
  62                                                       [self wheel:1],
  63                                                       [self wheel:2]);
  64     CGEventPost(kCGHIDEventTap, scroll);
  65     CFRelease(scroll);
  66
  67     return YES;
  68 }
  69
  70 @end