Which view we want to move by. <p/> The view that implements this should call too {@link ParallaxViewController#parallaxViewBy(android.view.View, floa

This does a bit more than move the background, it will make it fit the view in a way that it will reach out side its bounds to take into account @par

This method is by no means accurate, and Will only work to any degree of accuracy if your list items are the same height. Otherwise it becomes vastly

Call from an AbsListView.OnScrollListener to calculate the incremental offset (change in scroll offset since the last calculation). @return The offs

Checks the BackgroundMap is ready to use.

Checks the viewMap is ready to use.

Will do the scroll changed stuff. @param x currentX of Parallaxor View @param y currentX of Parallaxor View @param oldX Previous X @param oldY

Hack to fix pre JB MR1 Kudos to @cyrilmottier @param view view drawable attached too. @param drawable drawable which gets invalidated

Init this controller

Used to do parallax, Your implementation should call directly through to this. Some implementations ignore this on purpose (e.g. the ListView) @param

@return can not be null, otherwise scroll will fail

Add a scroll listener you can listen too if you want to do something custom your end as well. @param onScrollChangedListener Null is valid (it will r

Default impl returns the View width

Default impl returns the View height

Used internally by the AbsListView implementation, calling through to this is unnecessary, the controller will happily set the OnScrollListener

@param view View which to attach the drawable to. (null will do nothing) @param drawable Drawable to Parallax (null will do nothing) @param mu

Add a view to be parallax'd by. If already set this will replace the current factor. @param view passing in yourself will throw an exception. @