class: ScrollEvent

[13:7] extends: object

An event related to a scrolling motion.

Members

• handleObj
• lib
• retainedCallbacks
• signalHandlerNames
• signalSetterHandlers

Methods

• ScrollEvent (Handle = null)

  Creates a new ScrollEvent by wrapping a native handle or another wrapper.

  • @p Handle is the native handle or another wrapper whose handle to adopt.

• toNativeHandle (Source)

  Normalizes a constructor argument into a raw pointer carrier. Accepts a raw NativeHandle, a raw NativeBuffer returned from fn.call(...), another generated wrapper exposing handle(), or null. Returns null when the argument carries no pointer.

  • @p Source is the raw handle, raw buffer, wrapper, or null.
  • @r A raw pointer carrier or null when no pointer is present.

• getLib ()

  Returns the opened native library for this generated wrapper.

  • @r The opened native library.

• handle ()

  Returns the wrapped NativeHandle.

  • @r The wrapped NativeHandle.

• isNull ()

  Returns true when the wrapped handle is null.

  • @r A bool.

• describe ()

  Returns a small string for debugging generated wrappers.

  • @r A string.

• asEvent ()

  Wraps this handle as Event.

  • @r A Event object.

• get_direction ()

  Extracts the direction of a scroll event.

• get_relative_direction ()

  Extracts the scroll direction relative to the physical motion.

• get_unit ()

  Extracts the scroll delta unit of a scroll event. The unit will always be %GDK_SCROLL_UNIT_WHEEL if the scroll direction is not %GDK_SCROLL_SMOOTH.

• is_stop ()

  Check whether a scroll event is a stop scroll event. Scroll sequences with smooth scroll information may provide a stop scroll event once the interaction with the device finishes, e.g. by lifting a finger. This stop scroll event is the signal that a widget may trigger kinetic scrolling based on the current velocity. Stop scroll events always have a delta of 0/0.