TAbstractControlRequirements Class

TAbstractControlRequirements lists the variables and functions that the controls in an adapter form require to generate their HTML.

Class Hierarchy

Pascal

TAbstractControlRequirements = class;

C++

class TAbstractControlRequirements;

File

WebForm

Description

Components that generate HTML controls to represent the fields of an adapter (TAdapterControlGroup and TAdapterDataDisplay descendants) use descendants of TAbstractControlRequirements. The descendants of TAbstractControlRequirements store the variable and function declarations the adapter form must include before the control group can assemble HTML controls for the fields of the adapter it represents.

TAbstractControlRequirements introduces methods to

Store a specified function or variable (along with its value).

Query whether the function or variable declaration has already been added to the list of requirements.

Store an indication of whether the control requires that it be contained in a multipart form.

TAbstractControlRequirements is abstract or, in C++ terminology, pure virtual. It does not implement any of the methods it declares. WebSnap applications use TAbstractControlRequirements descendants such as TControlRequirements, which provide implementations for these methods.