Updated to highlight a drag path too close to the center.

funkyboy · Mar 1, 2012 · 0413d8c · 0413d8c
1 parent 9c228b0
commit 0413d8c
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Showing 2 changed files with 15 additions and 2 deletions.
diff --git a/...oj/project.xcworkspace/xcuserdata/cesarerocchi.xcuserdatad/UserInterfaceState.xcuserstate b/...oj/project.xcworkspace/xcuserdata/cesarerocchi.xcuserdatad/UserInterfaceState.xcuserstate
diff --git a/RotaryWheelProject/SMRotaryWheel.m b/RotaryWheelProject/SMRotaryWheel.m
@@ -206,8 +206,6 @@ - (BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event {
         return NO;
     }
 
-
-
 	float dx = touchPoint.x - container.center.x;
 	float dy = touchPoint.y - container.center.y;
 	deltaAngle = atan2(dy,dx); 
@@ -225,6 +223,21 @@ - (BOOL)continueTrackingWithTouch:(UITouch*)touch withEvent:(UIEvent*)event
 {
 
 	CGPoint pt = [touch locationInView:self];
+
+    float dist = [self calculateDistanceFromCenter:pt];
+
+    if (dist < 40 || dist > 100) 
+    {
+        // a drag path too close to the center
+        NSLog(@"drag path too close to the center (%f,%f)", pt.x, pt.y);
+
+        // here you might want to implement your solution when the drag 
+        // is too close to the center
+        // You might go back to the clove previously selected
+        // or you might calculate the clove corresponding to
+        // the "exit point" of the drag.
+
+    }
 
 	float dx = pt.x  - container.center.x;
 	float dy = pt.y  - container.center.y;