TNotebook.OnMouseWheelDown property
Event handler signalled for a downward movement of the mouse wheel.
Declaration
property OnMouseWheelDown:;Description
OnMouseWheelDown is a
TMouseWheelUpDownEvent property
with the event handler signalled when a downward movement of the mouse wheel
has occurred in the control.
OnMouseWheelDown is signalled (when assigned) from the DoMouseWheelDown method using the control instance as the Sender for the event notification. It occurs when the OnMouseWheel event handler has not been assigned, or does not handle the mouse wheel event.
Use OnMouseWheelUp to perform actions needed when an upward movement of the mouse wheel has occurred.
Use OnMouseWheel when a delta value with the direction for the mouse wheel movement is needed.
This description is the one of Controls.TControl.OnMouseWheelDown.
See also
- OnMouseWheel
- OnMouseWheelUp
- DoMouseWheelDown
- DoMouseWheel
- TMouseWheelUpDownEvent
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.