In an image gallery if i swipe left the image should follow my finger until the next image shows up on the right side, not stay still until i finish whatever the platform consider a "swipe left gesture". Same for pinch, the image should be resized under my fingers as i move them, not after i release them.
I haven't seen predefined gestures being useful in any app or web page ever so i'm sorry to say this library will be likewise, despite it looking very clean and easy to use from a developer point of view.