Method XbpWindow():getInvalidRect() Foundation
Get current invalid rectangle of the Xbase Part.
:getInvalidRect() --> aInvRectThis method returns an array with the current invalid rectangle of the Xbase Part. If the invalid rectangle is empty, the method returns the array {0,0,0,0}.
:getInvalidRect() returns the current invalid rectangle of the Xbase Part. A non-empty invalid rectangle is redrawn by the system at the next opportunity, and the event xbeP_Paint is generated. In addition, a code block assigned to the :paint instance variable is evaluated automatically. If owner-drawing has been enabled for the Xbase Part, redrawing the invalid rectangle is performed synchronously via xbeP_Draw and similar events. See method :invalidateRect() for further information.
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