epoc32/include/apgctl.h
author William Roberts <williamr@symbian.org>
Tue, 16 Mar 2010 16:12:26 +0000
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// Copyright (c) 1997-2009 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 the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
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// which accompanies this distribution, and is available
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// at the URL "http://www.symbianfoundation.org/legal/licencesv10.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:
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//
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#ifndef __APGCTL_H__
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#define __APGCTL_H__
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#if !defined(__E32STD_H__)
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#include <e32std.h>
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#endif
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#if !defined(__E32BASE_H__)
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#include <e32base.h>
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#endif
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// classes defined:
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class CApaSystemControl;
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class CApaSystemControlList;
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//
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// classes referenced:
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class RFs;
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class CApaMaskedBitmap;
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//
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/**
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Calls the control DLL's first ordinal function to create and run the control.
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The function leaves with KErrBadLibraryEntryPoint if the ordinal 1 function 
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cannot be found.
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@publishedAll 
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@released
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*/
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typedef TInt (*ApaRunSystemControl)(const TDesC&);
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/**
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@publishedAll 
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@released
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*/
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#ifdef _UNICODE
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#define KUidSystemControlDll KUidSystemControlDll16
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#else
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#define KUidSystemControlDll KUidSystemControlDll8
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#endif
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/**
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@publishedAll 
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@deprecated
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*/
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const TInt KSystemControlDllUidValue8=0x10000297;
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/**
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@publishedAll
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@deprecated
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*/
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const TUid KUidSystemControlDll8={KSystemControlDllUidValue8};
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/**
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@publishedAll
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@released
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*/
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const TUid KUidSystemControlDll16={0x10003A34};
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class CApaSystemControl : public CBase
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/** Wrapper to a control panel application.
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An instance of the class represents a control panel application. It is also a cache for the control's icon and caption.
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An instance of the wrapper can only be constructed by the control panel application list, which 
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is a CApaSystemControlList object. 
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@publishedAll
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@released */
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	{
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public:
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	IMPORT_C void CreateL();
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	IMPORT_C TUid Type()const;
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	IMPORT_C TFileName FileName()const;
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	IMPORT_C CApaMaskedBitmap* Icon()const; // one size of icon, 48x48?
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	IMPORT_C TPtrC Caption()const;
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	IMPORT_C TPtrC ShortCaption()const;
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private:
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	static CApaSystemControl* NewL(RFs& aFs,const TDesC& aFullPath,const TUidType aUidType);
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	~CApaSystemControl();
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	CApaSystemControl(RFs& aFs);
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	void ConstructL(const TDesC& aFullPath,const TUidType aUidType);
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private:
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	CApaSystemControl* iNext;
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	HBufC* iCaption;
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	HBufC* iShortCaption;
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	CApaMaskedBitmap* iIcon;
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	TBool iExists; // used during updating
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	TFileName iFullPath;
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	TUidType iUidType;
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	RFs& iFs;
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	friend class CApaSystemControlList;
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	};
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class CApaSystemControlList : public CBase
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/** Provides a list of all available control panel applications present on the phone. 
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This class is implemented as a linked list of CApaSystemControl. Updates the control panel application list by removing 
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control panels that no longer exist, adding new control panels found to the control panel application list and replacing 
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a control panel if found in an earlier drive.
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@see CApaSystemControl
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@publishedPartner
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@released
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*/
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	{
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public:
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	IMPORT_C static CApaSystemControlList* NewL(RFs& aFs);
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	IMPORT_C ~CApaSystemControlList();
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	IMPORT_C TInt Count()const;
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	IMPORT_C TInt Index(TUid aType)const;
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	IMPORT_C CApaSystemControl* Control(TInt aIndex)const;
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	IMPORT_C CApaSystemControl* Control(TUid aType)const;
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	IMPORT_C void UpdateL();
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	inline TInt UpdateCount()const;
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private:
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	CApaSystemControlList(RFs& aFs);
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	CApaSystemControl* PreviousControl(const CApaSystemControl* aControl) const;
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private:
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	TInt iUpdateCount;
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	RFs& iFs;
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	CApaSystemControl* iControl;
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	};
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//
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// inlines
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//
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inline TInt CApaSystemControlList::UpdateCount()const
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/** Gets the number of times the control panel application list has been 
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updated (by calling UpdateL()). It returns 1 for a newly created list.
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@return The number of times the control panel application list has been changed. */
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	{ return iUpdateCount; }
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#endif