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CLASS
Creates a new Class with its new Methods and Instances
Syntax:
CLASS DEFINITION
#include "Objects.ch"
CLASS ClassName [ FROM SuperClass1 [, SuperClassN ] ]
DATA DataName1 [, DataNameN ]
METHOD MethodName( [ Param1 [, ParamN ] ] ) CONSTRUCTOR
METHOD MethodName( [ Par1 [, ParN ] ] ) BLOCK ;
{ | Self [, Par1 [, ParN ] ] | Actions, , , }
METHOD MethodName( [ Par1 [, ParN ] ] ) SETGET
METHOD MethodName( [ Par1 [, ParN ] ] ) VIRTUAL
METHOD MethodName( [ Par1 [, ParN ] ] )
ENDCLASS
METHOD DEFINITION
METHOD MethodName( Par1, Par2, ... ) CLASS ClassName
...
[ ::Parent:New( Par1, Par2, ... ) ]
...
::DataName1 := ...
...
::MethodName( ... )
...
Return [ Return Value ]
CLASS : Indicates the start of a class definition
FROM : Determines if this class must receive the methods and
instances from other class that serve as the superclass
or master class.
DATA : Define instances or internal variables of the class.
METHOD : Define methods of the class.
CONSTRUCTOR : Indicates the constructor method of the class.
BLOCK : Define a method like a codeblock.
VIRTUAL : Define empty methods.
ENDCLASS : Marks the end of the definition of the class.
Description:
Define new classes in Clipper. You must access the non-
documented functions of the SEND module.
All Methods and Instances of the new class will automatically be
defined upon creation and will inherit from the superclass if the
FROM statement is invoked. If you're unfamiliar with the Clipper
SEND syntax, help is very often available from the power users that
congregate on Compuserve's Clipper forum. It is beyond the scope of
this document to teach OOPS.
Return:
Not available.
Example:
Function oDemo()
Local oTest := TDemo():New( 33, 10 )
oTest:cMess := "Welcome to FAST.lib"
oTest:SetClr := "W/B"
oTest:Message()
Return ( Nil )
CLASS TDemo
DATA nPosX
DATA nPosY
DATA cMens
DATA cClr
METHOD New( nY, nX ) CONSTRUCTOR
METHOD Message()
METHOD SetClr( cC ) BLOCK { | Self, cC | ::cClr := cC }
ENDCLASS
METHOD Function New( nY, nX )
::nPosY := nY
::nPosX := nX
Return( Self )
METHOD Function Mess()
@ ::nPosY, ::nPosX Say ::cMess Color ::cClr
Return( Self )
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