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Date Posted: 19:25:13 10/05/01 Fri
Author: Konstantin Rudenko
Subject: TImageTransfrorm

I wrote my procedure for making transformations and send class as parametr. Then in procedure I use code like this:

TTransformClass = class of TImageTransform;

procedure MakeTrasform(TransformType : TTransformClass; Param : Variant);
var
Transform : TImageTransform;
...

begin
...
try
Transform:=TransformType.Create;
if Assigned(Transform) then
begin
Transform.OnProgress:=OnTransformProgress;
Transform.Apply(Graphic);
end;
...

for calling this procedure just:

...
MakeTrasform(TNegativeTransform,Null);
...

But. TImageTransform han't Create constructor and all descendants has Create as static method, so in MakeTransform actual Create for transform class not called, called TObject.Create.

Can it be added in TImageTransform class
constructor Create; virtual;

in all other Transorm classes
constructor Create; override;


Thanks.
Konstantin

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