166 lines
3.1 KiB
Plaintext
166 lines
3.1 KiB
Plaintext
//
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// DynObj
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//
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// Implementation of dynamic objects in Harbour
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//
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// Date : 1999/05/12
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//
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#define DATA_SYMBOL 1
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#define DATA_VAL 2
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function Main()
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local oForm := TForm():New()
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local nSeq
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QOut( "What methods are in the class :" )
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HBDebug( aoMethod( oForm ) )
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/* Let's add an inline at run-time. Should already be possible */
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QOut( "Let's add inline 'CalcArea' at run-time to an already instanced class" )
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oAddInline( oForm, "CalcArea", ;
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{|self| ( ::nRight - ::nLeft ) * ( ::nBottom - ::nTop ) } )
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QOut( "What methods are in the class :" )
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HBDebug( aoMethod( oForm ) )
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QOut( "What is the Form area ?" )
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QOut( oForm:CalcArea() )
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QOut( "Let's add method 'Smile' at run-time to an already instanced class" )
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oAddMethod( oForm, "Smile", @Smile() )
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QOut( "What methods are in the class :" )
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HBDebug( aoMethod( oForm ) )
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QOut( "Smile please " )
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oForm:Smile()
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Pause()
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QOut( "Data items before" )
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HBDebug( oForm )
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QOut( "Let's add an additional data item" )
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oAddData( oForm, "cHelp" )
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oForm:cHelp := "This is a real tricky test"
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QOut( "Data items after" )
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HBDebug( oForm )
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Pause()
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QOut( "Let's attach a bigger smile" )
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oModMethod( oForm, "Smile", @BigSmile() )
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QOut( "Let's smile" )
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oForm:Smile()
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QOut( "And CalcArea() will now give a result in square inches" )
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oModInline( oForm, "CalcArea", ;
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{|self| ( ::nRight - ::nLeft ) * ( ::nBottom - ::nTop ) / (2.54*2.54) } )
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QOut( "What is the Form area ?" )
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QOut( oForm:CalcArea() )
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QOut( "What methods are in the class :" )
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HBDebug( aoMethod( oForm ) )
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QOut( "Delete CalcArea" )
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oDelInline( oForm, "CalcArea" )
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QOut( "What methods are in the class :" )
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HBDebug( aoMethod( oForm ) )
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QOut( "Delete Smile" )
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oDelMethod( oForm, "Smile" )
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QOut( "What methods are in the class :" )
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HBDebug( aoMethod( oForm ) )
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Pause()
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QOut( "Data items before" )
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HBDebug( oForm )
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QOut( "Let's delete cHelp" )
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oDelData( oForm, "cHelp" )
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QOut( "Data items after" )
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HBDebug( oForm )
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/* oForm:cHelp := "Please crash" */
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return nil
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function TForm()
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static oClass
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if oClass == nil
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oClass = TClass():New( "TFORM" ) // starts a new class definition
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oClass:AddData( "cText" ) // define this class objects datas
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oClass:AddData( "nTop" )
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oClass:AddData( "nLeft" )
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oClass:AddData( "nBottom" )
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oClass:AddData( "nRight" )
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oClass:AddMethod( "New", @New() ) // define this class objects methods
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oClass:AddInline( "Show", {|self| ::cText } )
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oClass:Create() // builds this class
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endif
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return oClass:Instance() // builds an object of this class
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static function New()
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local Self := QSelf()
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::nTop := 10
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::nLeft := 10
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::nBottom := 20
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::nRight := 40
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return Self
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static function Smile()
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local self := QSelf()
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if ::CalcArea() == 300
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QOut( ":-)" )
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else
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QOut( ":-(" )
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endif
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return self
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static function BigSmile()
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local self := QSelf()
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QOut( ":-)))" )
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return self
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function Pause()
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__Accept( "Pause :" )
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return nil
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