Event XbpWindow():leave Foundation

Mouse moved out of the display rectangle.

:leave := {| uNIL1, uNIL2, self | ... }
:leave() --> self
xbeM_Leave (1048582)

This method returns the object executing the method (self).


The xbeM_Leave event is generated when the mouse pointer is moved out of the display rectangle of an Xbase Part. Together with its counterpart xbeM_Enter, xbeM_Leave can be used to detect when the mouse is positioned over the object. This can be used to give visual feedback as to which control would be activated if the mouse was clicked at a certain position.

In order to receive the xbeM_Leave notification, an Xbase Part must be configured to track mouse pointer movement. This is done automatically when a code block is assigned to the :leave callback slot. If xbeM_Leave is to be processed via the callback method :enter(), the method must be overloaded in a derived class. Furthermore, :setTrackPointer() must be called explicitly. This may be done in the :create() method of the derived class.

The xbeM_Leave event is sent synchronously via the :handleEvent() method of an XbpWindow object. This means that xbeM_Leave will not be retrieved by the AppEvent() function. As it is generated while the user moves the mouse, we strongly discourage to perform lengthy operations while processing the event.

Xbase Parts derived from XbpWindow maintain a special state to detect whether the mouse pointer is currently placed over the object. See member variable :controlState for further information.

Usage with ActiveX: The event xbeM_Leave is not supported for ActiveX controls. If an ActiveX control supports similar functionality, the corresponding COM/ActiveX methods or interfaces must be used instead.


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