Class TPictureHeader

class TPictureHeader;

Description

Picture header providing an interface to a stored picture. The header holds:

the picture's type, encoded as a UID, which ensures that it will be restored to the correct picture type

the picture's size, which facilitates deferred loading

the stream ID of the picture body, which is replaced by a pointer to the picture object when it has been restored.

Members

Defined in TPictureHeader:

• DeletePicture()Deletes the internalised picture.
• ExternalizeL(RWriteStream &)constExternalises a picture header object to a write stream.
• InternalizeL(RReadStream &)Internalises a picture header object from a read stream.
• TPictureHeader()Constructs a default picture header.
• iPictureA swizzle storing either the ID of the stream in which the picture is stored, or...
• iPictureTypeA UID specifying the type of the picture.
• iSizeThe original size of the picture.

IMPORT_C TPictureHeader();

Description

Constructs a default picture header.

IMPORT_C void InternalizeL(RReadStream &aStream);

Description

Internalises a picture header object from a read stream.

The presence of this function means that the standard templated stream operator>>(RReadStream &,T &) is available to internalise objects of this class.

Parameters

RReadStream &aStream The read stream.

IMPORT_C void ExternalizeL(RWriteStream &aStream) const;

Description

Externalises a picture header object to a write stream.

The presence of this function means that the standard templated stream operator<<(RWriteStream &,const T &) is available to externalise objects of this class.

Parameters

RWriteStream &aStream The write stream.

IMPORT_C void DeletePicture();

Description

Deletes the internalised picture.

The picture can only be deleted if the picture has been internalized.

TSwizzle< CPicture > iPicture;

Description

A swizzle storing either the ID of the stream in which the picture is stored, or a pointer to the internalised picture.

TUid iPictureType;

Description

A UID specifying the type of the picture.

TSize iSize;

Description

The original size of the picture.