MouseEvent

This object is received as first parameter in the function associated to onmousedown, onmouseup, onmousemove, or onwheel events of a canvas widget.

MouseEvent.x

  onmousedown=function(ev)
    print('mouse button pressed in', ev.x, ev.y)
  end

The (x,y) position of the mouse when the event happens, in client coordinates, where (0,0) is the top-left corner of the canvas widget.

MouseEvent.y

See MouseEvent.x

MouseEvent.button

The MouseButton pressed or released by the user.

MouseEvent.pressure

The pressure of pen when the event is generated from a stylus.

MouseEvent.deltaX

Only for the onwheel event.

MouseEvent.deltaY

Only for the onwheel event.

MouseEvent.altKey

True if the Alt key was pressed when the event occurs.

MouseEvent.metaKey

True if the Windows key (or Command key on macOS) was pressed when the event occurs.

MouseEvent.ctrlKey

True if the Ctrl key was pressed when the event occurs.

MouseEvent.shiftKey

True if the Shift key was pressed when the event occurs.

MouseEvent.spaceKey

True if the Space key was pressed when the event occurs.

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