Cocoa Internals/Extensions

Extensions are used to add additional lcl-friendly methods to all Cocoa classes. The default implementation of each method should:

• either indicate that a class is not a LCL-specific class (it's Cocoa native) thus should be handled with care
• provide a basic functionality for LCL types (for example setting a control bounds using TRect type. Where cocoa is using float-point NSRect)

Extensions

LCLObjectExtension

The extensions adds additional methods to NSObject class of cocoa. (This is TObject counterpart, where (almost) all classes in Cocoa inherit from).

A lot of the methods below are control specific methods, thus it might be a good idea to elevate the extension from NSObject to NSView or NSControl. However, this might impact other control-like objects (i.w. NSWindow?)

LCLObjectExtensions methods are:

Method	Description	Default behavior
		LCLObjectExtension	LCLViewExtensions
lclIsEnabled	Returns true/false if control is enabled	false
lclSetEnable	Enables or disables the control	does nothing
lclisVisible	Returns true/false if control is visible	false	not hidden()
lclSetVisible	shows or hides a control	does nothing	setHidden() (where is the method in the documentation? deprecated?)
lclisHandle	Returns true if the instance of the class can be considered a LCL handle	false

Convention

• All lcl extension methods should start with "lcl" to distinguish them Cocoa native methods.

See Also

• Cocoa Internals