systemagentdocument.cpp

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/**
* 
* @brief Definition of CSystemAgentDocument
*
* Copyright (c) EMCC Software Ltd 2003
* @version 1.0
*/

// INCLUDE FILES

// Class include
#include "SystemAgentDocument.h"

// User includes
#include "SystemAgentAppUi.h"	// CSystemAgentAppUi

// ================= MEMBER FUNCTIONS =======================

/**
* Constructs the document for aApp
*
* @param aApp for which the document is constructed
*/
CSystemAgentDocument::CSystemAgentDocument(CEikApplication& aApp)
:CAknDocument(aApp), 
 iSystemAgentState(ESystemAgentRed)
	{
	}

/**
* Symbian OS 2nd phase constructor.
*
*/
void CSystemAgentDocument::ConstructL()
	{
	// Connect to the System Agent
	User::LeaveIfError(iSAVarChangeNotify.Connect());

	// Set initial value for our state and notify System Agent of it
	SetSystemAgentStateVarL(ESystemAgentRed);
	}

/**
* Symbian OS 2nd phase constructor.
* Constructs the CSystemAgentDocument using the constructor and the ConstructL 
* method.
* @param aApp for which the CSystemAgentDocument is constructed
* @return The newly constructed CSystemAgentDocument
*/
CSystemAgentDocument* CSystemAgentDocument::NewL(CEikApplication& aApp)
	{
	CSystemAgentDocument* self = new (ELeave) CSystemAgentDocument(aApp);
	CleanupStack::PushL(self);
	self->ConstructL();
	CleanupStack::Pop(self);
	return self;
	}

/**
* Destructor.
* Releases our state variable and closes the connection to the System Agent.
*/
CSystemAgentDocument::~CSystemAgentDocument()
	{
	iSAVarChangeNotify.ReleaseVariable(KUidSystemAgentStateVariable);
	iSAVarChangeNotify.Close();
	}


/**
* Creates the AppUi for this document.
* @return The newly constructed AppUi
*/	
CEikAppUi* CSystemAgentDocument::CreateAppUiL()
	{
	return new (ELeave) CSystemAgentAppUi;
	}


/**
* Demonstrates notifying the System Agent of a change in a state variable
*/
void CSystemAgentDocument::SetSystemAgentStateVarL(TSystemAgentStatus aState)
	{
	// Update our internal state and notify the System Agent that our state has changed
	iSystemAgentState = aState;
	iSAVarChangeNotify.NotifySaVarChangeL(KUidSystemAgentStateVariable, iSystemAgentState);
	}

/**
 * Simply changes our state to a different value
 */
void CSystemAgentDocument::ChangeSystemAgentStateVarL()
	{
	// Change our state to a different color
	TSystemAgentStatus newState = ESystemAgentRed;
	if (iSystemAgentState == ESystemAgentRed)
		{
		newState = ESystemAgentGreen;
		}
	else if (iSystemAgentState == ESystemAgentGreen)
		{
		newState = ESystemAgentBlue;
		}
	else if (iSystemAgentState == ESystemAgentBlue)
		{
		newState = ESystemAgentRed;
		}

	SetSystemAgentStateVarL(newState);
	}


// End of File