author | William Roberts <williamr@symbian.org> |
Wed, 31 Mar 2010 12:33:34 +0100 | |
branch | Symbian3 |
changeset 4 | 837f303aceeb |
permissions | -rw-r--r-- |
4
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/* |
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* Copyright (c) 2004-2007 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: An interface for the field of the store contact |
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* |
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*/ |
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|
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#ifndef MVPBKSTORECONTACTFIELD_H |
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#define MVPBKSTORECONTACTFIELD_H |
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|
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// INCLUDES |
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#include <e32std.h> |
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#include <mvpbkbasecontactfield.h> |
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|
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// CONSTANTS |
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/// A constant that indicates that the store doesn't set limits |
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/// to the length of the label |
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const TInt KVPbkUnlimitedLabelLength = -1; |
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|
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// FORWARD DECLARATIONS |
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class MVPbkContactLink; |
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|
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// CLASS DECLARATIONS |
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|
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/** |
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* An interface for the field of the store contact. |
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* |
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* Client can access the contact field using this interface. The field |
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* can have a label and a data. |
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* |
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* A new field can be created using the MVPbkStoreContact interface. |
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* For looping the contact fields see MVPbkStoreContactFieldCollection. |
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* The parent of the field in the object hierarchy is the store contact. |
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* |
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* @see CVPbkContactFieldTypeIterator |
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* @see CVPbkFieldTypeSelector |
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*/ |
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class MVPbkStoreContactField : public MVPbkBaseContactField, |
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public MVPbkObjectHierarchy |
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{ |
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public: // Destructor |
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/** |
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* Destructor |
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*/ |
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virtual ~MVPbkStoreContactField() { } |
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|
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public: // From MVPbkBaseContactField |
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virtual const MVPbkContactFieldData& FieldData() const = 0; |
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|
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public: // New functions |
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/** |
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* Returns ETrue if the field supports label. |
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* |
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* Overwrites the global setting in MVPbkContactStoreProperties. |
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* This must be confirmed before using SetFieldLabelL or |
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* MaxLabelLength. |
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* |
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* @return ETrue if the field supports label. Otherwise EFalse. |
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*/ |
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virtual TBool SupportsLabel() const = 0; |
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|
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/** |
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* Returns the label of the field or KNullDesC if there is no field |
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* label. |
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* |
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* @return The label of the field or KNullDesC |
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*/ |
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virtual TPtrC FieldLabel() const = 0; |
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|
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/** |
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* Sets this field's label. |
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* |
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* SupportsLabel must be true for using this. |
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* |
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* @param aText The label for the field. |
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*/ |
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virtual void SetFieldLabelL( const TDesC& aText ) = 0; |
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/** |
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* Gets the maximum length of the label. |
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* |
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* SupportsLabel must be true for using this. |
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* |
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* @return The maximum length of the label or KVPbkUnlimitedLabelLength |
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* if the store has no limits. Zero should be returned in other |
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* cases though this shouldn't be called if labels are |
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* not supported. |
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*/ |
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virtual TInt MaxLabelLength() const = 0; |
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|
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/** |
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* Returns the data storage (read-write) of the field. |
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* |
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* The data type depends on the field and it's client's responsibility |
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* to check the type before casting the type. |
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* |
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* @return The data storage of the field. |
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* @see MVPbkContactFieldTextData::Cast |
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* @see MVPbkContactFieldDateTimeData::Cast |
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* @see MVPbkContactFieldBinaryData::Cast |
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*/ |
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virtual MVPbkContactFieldData& FieldData() = 0; |
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|
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/** |
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* Clones the field. |
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* |
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* Pushes the created copy to the cleanup stack. |
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* |
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* @return A copy of the field. |
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* @see MVPbkStoreContactFieldCollection::FieldAt |
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*/ |
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virtual MVPbkStoreContactField* CloneLC() const = 0; |
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|
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/** |
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* Creates a link representing the contact and the field. |
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* |
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* The field can be later retrieved using the RetrieveField of |
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* MVPbkStoreContactFieldCollection interface. |
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* |
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* NOTE: implementations of stores are possibly using an index |
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* of the field as an identifier so clients should prefer not |
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* to save field links permanently. E.g modifying the contact |
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* can invalidate the link in some store implementations. |
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* A field link is practical in use cases where the link is |
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* created and immediately given to another component. |
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* |
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* @return A link representing the contact and the field or NULL |
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* if the contact doesn't exist in the store. E.g a new |
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* contact that hasn't been committed has no unique |
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* identifier yet. |
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* NULL is not put into the CleanupStack. |
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*/ |
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virtual MVPbkContactLink* CreateLinkLC() const = 0; |
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|
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/** |
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* Returns an extension point for this interface or NULL. |
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* |
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* @param aExtensionUid no extensions defined currently. |
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* @return An extension point for this interface or NULL. |
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*/ |
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virtual TAny* StoreContactFieldExtension( TUid /*aExtensionUid*/ ) |
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{ return NULL; } |
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}; |
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|
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|
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#endif // MVPBKSTORECONTACTFIELD_H |
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|
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// End of file |