Big rename part 3: 'target' to 'output'.

[enjoyable.git] / NJOutputMouseScroll.m

diff --git a/NJOutputMouseScroll.m b/NJOutputMouseScroll.m
new file mode 100644 (file)
index 0000000..9057125
--- /dev/null
+++ b/NJOutputMouseScroll.m
@@ -0,0 +1,69 @@
+//
+//  NJOutputMouseScroll.m
+//  Enjoy
+//
+//  Created by Yifeng Huang on 7/28/12.
+//
+
+#import "NJOutputMouseScroll.h"
+
+@implementation NJOutputMouseScroll {
+    int sign;
+}
+
++ (NSString *)serializationCode {
+    return @"mouse scroll";
+}
+
+- (NSDictionary *)serialize {
+    return @{ @"type": @"mouse scroll", @"amount": @(_amount) };
+}
+
++ (NJOutput *)outputDeserialize:(NSDictionary *)serialization
+                  withMappings:(NSArray *)mappings {
+       NJOutputMouseScroll *output = [[NJOutputMouseScroll alloc] init];
+    output.amount = [serialization[@"amount"] intValue];
+       return output;
+}
+
+- (void)trigger {
+    if (!self.magnitude) {
+        CGEventRef scroll = CGEventCreateScrollWheelEvent(NULL,
+                                                          kCGScrollEventUnitLine,
+                                                          1,
+                                                          _amount);
+        CGEventPost(kCGHIDEventTap, scroll);
+        CFRelease(scroll);
+    }
+}
+
+- (BOOL)update:(NJInputController *)jc {
+    if (fabsf(self.magnitude) < 0.01f) {
+        sign = 0;
+        return NO; // dead zone
+    }
+    
+    // If the input crossed over High/Low, this output is done.
+    if (!sign)
+        sign = self.magnitude < 0 ? -1 : 1;
+    else if (sign / self.magnitude < 0) {
+        sign = 0;
+        return NO;
+    }
+
+    int amount = (int)(16.f * fabsf(self.magnitude) * _amount);
+    CGEventRef scroll = CGEventCreateScrollWheelEvent(NULL,
+                                                      kCGScrollEventUnitPixel,
+                                                      1,
+                                                      amount);
+    CGEventPost(kCGHIDEventTap, scroll);
+    CFRelease(scroll);
+
+    return YES;
+}
+
+- (BOOL)isContinuous {
+    return YES;
+}
+
+@end