TFindLogicalDevice Class Reference

#include <e32std.h>

class TFindLogicalDevice : public TFindHandleBase

Inherits from

Detailed Description

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.

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.

See also: 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().

See also: TFindHandleBase::Find

Parameters
aMatchThe match pattern.

Member Function Documentation

Next ( TFullName & )

IMPORT_C TIntNext(TFullName &aResult)

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

Parameters
aResultA 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.
Return Value
KErrNone, if a matching LDD factory object is found; KErrNotFound otherwise.