If set, the event shouldn't be managed anymore, for instance it can be used to block the handler to manage the scroll of a view on some scenarios

// This handler handles automatically the scroll of
// flickableItem, unless Ctrl is pressed, in this case the
// app has custom code to handle Ctrl+wheel zooming
Kirigami.WheelHandler {
  target: flickableItem
  blockTargetWheel: true
  scrollFlickableTarget: true
  onWheel: {
       if (wheel.modifiers & Qt.ControlModifier) {
           wheel.accepted = true;
           // Handle scaling of the view
      }
  }
}

The distance the wheel is rotated in degrees. The x and y coordinates indicate the horizontal and vertical wheels respectively. A positive value indicates it was rotated up/right, negative, bottom/left This value is more likely to be set in traditional mice.

it contains an OR combination of the buttons that were pressed during the wheel, they can be: Qt.LeftButton, Qt.MiddleButton, Qt.RightButton

Whether the delta values are inverted On some platformsthe returned delta are inverted, so positive values would mean bottom/left

Keyboard modifiers that were pressed during the wheel event, such as: Qt.NoModifier (default, no modifiers) Qt.ControlModifier Qt.ShiftModifier ...

provides the delta in screen pixels available on high resolution trackpads

X coordinate of the mouse pointer

Y coordinate of the mouse pointer