redraw/dom/event/wheel

The WheelEvent interface represents events that occur due to the user moving a mouse wheel or similar input device.

This is the standard wheel event interface to use. Old versions of browsers implemented the non-standard and non-cross-browser-compatible MouseWheelEvent and MouseScrollEvent interfaces. Use this interface and avoid the non-standard ones.

Don’t confuse the wheel event with the scroll event:

• A wheel event doesn’t necessarily dispatch a scroll event. For example, the element may be unscrollable at all. Zooming actions using the wheel or trackpad also fire wheel events.
• A scroll event isn’t necessarily triggered by a wheel event. Elements can also be scrolled by using the keyboard, dragging a scrollbar, or using JavaScript.
• Even when the wheel event does trigger scrolling, the delta* values in the wheel event don’t necessarily reflect the content’s scrolling direction.

pub type WheelEvent

pub const as_event: fn(WheelEvent) -> event.Event

pub const as_mouse_event: fn(WheelEvent) -> mouse.MouseEvent

pub const as_ui_event: fn(WheelEvent) -> ui.UIEvent

pub fn delta_mode(event: WheelEvent) -> Int

pub fn delta_x(event: WheelEvent) -> Float

pub fn delta_y(event: WheelEvent) -> Float

pub fn delta_z(event: WheelEvent) -> Float