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               };
  21 }
  22
  23 + (NJOutput *)outputDeserialize:(NSDictionary *)serialization
  24                   withMappings:(NSArray *)mappings {
  25         NJOutputMouseScroll *output = [[NJOutputMouseScroll alloc] init];
  26     output.direction = [serialization[@"direction"] intValue];
  27     output.speed = [serialization[@"direction"] floatValue];
  28         return output;
  29 }
  30
  31 - (BOOL)isContinuous {
  32     return !!self.speed;
  33 }
  34
  35 - (void)trigger {
  36     if (!self.speed) {
  37         CGEventRef scroll = CGEventCreateScrollWheelEvent(NULL,
  38                                                           kCGScrollEventUnitLine,
  39                                                           1,
  40                                                           _direction);
  41         CGEventPost(kCGHIDEventTap, scroll);
  42         CFRelease(scroll);
  43     }
  44 }
  45
  46 - (BOOL)update:(NJDeviceController *)jc {
  47     if (self.magnitude < 0.05f)
  48         return NO; // dead zone
  49
  50     int amount = (int)(_speed * self.magnitude * _direction);
  51     CGEventRef scroll = CGEventCreateScrollWheelEvent(NULL,
  52                                                       kCGScrollEventUnitPixel,
  53                                                       1,
  54                                                       amount);
  55     CGEventPost(kCGHIDEventTap, scroll);
  56     CFRelease(scroll);
  57
  58     return YES;
  59 }
  60
  61 @end