goog.events.MouseWheelEvent

Accepts a browser event object and creates a patched, cross browser event object.

Tests to see which button was pressed during the event. This is really only useful in IE and Gecko browsers. And in IE, it's only useful for mousedown/mouseup events, because click only fires for the left mouse button.

Safari 2 only reports the left button being clicked, and uses the value '1' instead of 0. Opera only reports a mousedown event for the middle button, and no mouse events for the right button. Opera has default behavior for left and middle click that can only be overridden via a configuration setting.

There's a nice table of this mess at http://www.unixpapa.com/js/mouse.html.

Whether this has an "action"-producing mouse button.

By definition, this includes left-click on windows/linux, and left-click without the ctrl key on Macs.

Prevents the default action, for example a link redirecting to a url.

Stops event propagation.

Whether alt was pressed at time of event.

Which mouse button was pressed.

Keycode of key press.

X-coordinate relative to the window.

Y-coordinate relative to the window.

Whether control was pressed at time of event.

Node that had the listener attached.

Whether the default action has been prevented. This is a property to match the W3C specification at #events-event-type-defaultPrevented. Must be treated as read-only outside the class.

The number of "lines" scrolled in the X direction.

Note that not all browsers provide enough information to distinguish horizontal and vertical scroll events, so for these unsupported browsers, we will always have a deltaX of 0, even if the user scrolled their mouse wheel or trackpad sideways.

Currently supported browsers are Webkit and Firefox 3.1 or later.

The number of lines scrolled in the Y direction.

The number of lines the user scrolled

Key of key press.

Keycode of key press.

Whether the meta key was pressed at time of event.

X-coordinate relative to target.

Y-coordinate relative to target.

Whether the default platform modifier key was pressed at time of event. (This is control for all platforms except Mac, where it's Meta.)

No information.

No information.

For mouseover and mouseout events, the related object for the event.

No information.

No information.

X-coordinate relative to the monitor.

Y-coordinate relative to the monitor.

Whether shift was pressed at time of event.

History state object, only set for PopState events where it's a copy of the state object provided to pushState or replaceState.

Target that fired the event.

Event type.