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TFindLogicalDevice Class Reference

class TFindLogicalDevice : public TFindHandleBase

Searches for LDD factory objects by pattern matching against the names of LDD factory objects.

An LDD factory object is an instance of a DLogicalDevice derived class.

The match pattern can be set into this object at construction; it can also be changed at any time after construction by using TFindHandleBase::Find() .

After construction, call TFindLogicalDevice::Next() repeatedly to find successive LDD factory objects whose names match the current pattern. A successful call to TFindLogicalDevice::Next() means that a matching LDD factory object has been found.

The name of an LDD factory object is set by its Install() member function as part of the construction process.

Inherits from

TFindLogicalDevice
- TFindHandleBase
  - TFindHandle

Public Member Functions
	TFindLogicalDevice ()
	TFindLogicalDevice (const TDesC &)
IMPORT_C TInt	Next ( TFullName &)

Inherited Functions
	TFindHandle::Handle()const
	TFindHandle::Reset()
	TFindHandle::TFindHandle()
	TFindHandleBase::Find(const TDesC &)
	TFindHandleBase::NextObject(TFullName &,TInt)
	TFindHandleBase::TFindHandleBase()
	TFindHandleBase::TFindHandleBase(const TDesC &)

Constructor & Destructor Documentation

TFindLogicalDevice()

TFindLogicalDevice

(

)

[inline]

Constructs the LDD factory object with a default match pattern.

The default match pattern, as implemented by the base class, is the single character "*".

A new match pattern can be set after construction by calling the Find() member function of the TFindHandleBase base class.

TFindHandleBase::Find

TFindLogicalDevice(const TDesC &)

TFindLogicalDevice

(

const TDesC &

aMatch

)

[inline]

Constructs the LDD factory object with a specified match pattern.

A new match pattern can be set after construction by calling TFindHandleBase::Find() .

TFindHandleBase::Find

Parameters

const TDesC & aMatch

The match pattern.

Member Functions Documentation

Next(TFullName &)

IMPORT_C TInt

(

TFullName &

aResult

)

Finds the full name of the next LDD factory object which matches the match pattern.

Parameters

TFullName & aResult

A reference to a TBuf descriptor with a defined maximum length. If a matching LDD factory object is found, its full name is set into this descriptor. If no matching LDD factory object is found, the descriptor length is set to zero.