Constructs new ZoomEvent event with null source and target.

Parameters:

eventType     The type of the event.

x     The x with respect to the scene.

y     The y with respect to the scene.

screenX     The x coordinate relative to screen.

screenY     The y coordinate relative to screen.

shiftDown     true if shift modifier was pressed.

controlDown     true if control modifier was pressed.

altDown     true if alt modifier was pressed.

metaDown     true if meta modifier was pressed.

direct     true if the event was caused by direct input device. See isDirect()

inertia     if represents inertia of an already finished gesture.

zoomFactor     zoom amount

totalZoomFactor     cumulative zoom amount

pickResult     pick result. Can be null, in this case a 2D pick result without any further values is constructed based on the scene coordinates

Since: JavaFX 8.0

`eventType`		The type of the event.
`x`		The x with respect to the scene.
`y`		The y with respect to the scene.
`screenX`		The x coordinate relative to screen.
`screenY`		The y coordinate relative to screen.
`shiftDown`		true if shift modifier was pressed.
`controlDown`		true if control modifier was pressed.
`altDown`		true if alt modifier was pressed.
`metaDown`		true if meta modifier was pressed.
`direct`		true if the event was caused by direct input device. See `isDirect()`
`inertia`		if represents inertia of an already finished gesture.
`zoomFactor`		zoom amount
`totalZoomFactor`		cumulative zoom amount
`pickResult`		pick result. Can be null, in this case a 2D pick result without any further values is constructed based on the scene coordinates