Reference for package '#rtl'

InvalidPoint

Check whether a point is invalid.

Declaration

Source position: classesh.inc line 2368

  function InvalidPoint(X: Integer; Y: Integer) : Boolean;
  function InvalidPoint(const At: TPoint) : Boolean;
  function InvalidPoint(const At: TSmallPoint) : Boolean;

Description

InvalidPoint returns True if the X and Y coordinates (of the TPoint or TSmallPoint records, if one of these versions is used) are -1.

See also

Name Description
PointsEqual Check whether two TPoint variables are equal.
TPoint Special type to handle a fake TComponent position
TSmallPoint Type to describe point in a small plane.