bluetoothchatappui.cpp

《基于symbian os的手机开发与应用》

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

// Class include
#include "BluetoothChatAppUi.h"

// System includes
#include <AknGlobalNote.h>
#include <AknNoteWrappers.h>
#include <AknQueryDialog.h>
#include <AknWaitDialog.h>
#include <BluetoothChat.rsg>		// R_BLUETOOTHCHAT_DIALOG
#include <eikmenup.h>
#include <stringloader.h>		// StringLoader

// User includes
#include "BluetoothChatDialog.h"	// CBluetoothChatDialog
#include "BluetoothChat.hrh"		// commands
#include "BluetoothDeviceSearcher.h"	// CBluetoothDeviceSearcher
#include "BluetoothServiceSearcher.h"	// CBluetoothServiceSearcher
#include "BluetoothClient.h"		// CBluetoothClient
#include "BluetoothServer.h"		// CBluetoothServer


// Constants
const TInt KFormattedMessagePrefixLength = 10;
_LIT(KFormattedMessagePrefix, "Message:\n");
const TInt KServerCleanupDelayMicroSeconds = 4000000;


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

/**
* Symbian OS 2nd phase constructor.
* Constructs and executes the application's dialog,
* setting itself as the dialog's MOP parent, and adds it to the control
* stack.
*
* Creates an instance of the Bluetooth Client and Server
*
* @param none
* @return none
*/
void CBluetoothChatAppUi::ConstructL()
	{
	BaseConstructL();
	iAppDialog = new (ELeave) CBluetoothChatDialog;
	iAppDialog->SetMopParent(this);
	iAppDialog->ExecuteLD(R_BLUETOOTHCHAT_DIALOG);
	AddToStackL(iAppDialog);

	iClient = CBluetoothClient::NewL(*this);
	iServer = CBluetoothServer::NewL(*this);
	}

/**
* Destructor.
* Removes the application's dialog from the stack and deletes it.
*
* Deletes the Bluetooth Client and Server, and message buffer
*
*/
CBluetoothChatAppUi::~CBluetoothChatAppUi()
	{
	if (iAppDialog)
		{
		RemoveFromStack(iAppDialog);
		delete iAppDialog;
		}

	delete iWaitDialog;

	delete iClient;
	delete iServer;

	delete iMessage;
	}

/**
* Dynamic Menu Construction
*
* Restricts options available to the User via the Menu
* Performs checks on the state of the Client and Server to see what should be offered
*
* @param aResourceId
* @param @aMenuPane
* @return none
*/
void CBluetoothChatAppUi::DynInitMenuPaneL(TInt aResourceId, CEikMenuPane* aMenuPane)
	{
	if (aResourceId == R_BLUETOOTHCHAT_MENU_PANE)
		{
		if (iClient->IsConnected() || iServer->IsConnected())
			{
			aMenuPane->SetItemDimmed(EBluetoothChatConnect, ETrue);
			aMenuPane->SetItemDimmed(EBluetoothChatReceive, ETrue);
			if (iClient->IsConnected())
				{
				aMenuPane->SetItemDimmed(EBluetoothChatStopReceive, ETrue);
				}
			if (!iClient->AvailableToSend() && !iServer->AvailableToSend())
				{
				aMenuPane->SetItemDimmed(EBluetoothChatSend, ETrue);
				}
			}
		else
			{
			aMenuPane->SetItemDimmed(EBluetoothChatStopReceive, ETrue);
			aMenuPane->SetItemDimmed(EBluetoothChatSend, ETrue);
			}
		}
	}

/**
* From CEikAppUi, takes care of command handling.
*
* @param aCommand command to be handled
* @return none
*/
void CBluetoothChatAppUi::HandleCommandL(TInt aCommand)
	{
	switch (aCommand)
		{
		case EBluetoothChatConnect:
			{
			FindRemoteDeviceL();
			break;
			}

		case EBluetoothChatReceive:
			{
			StartReceivingL();
			break;
			}

		case EBluetoothChatStopReceive:
			{
			iServer->StopL();
			break;
			}

		case EBluetoothChatSend:
			{
			if (ComposeMessageL())
				{
				if (iClient->AvailableToSend())
					{
					iClient->Send(*iMessage);
					}
				else if (iServer->AvailableToSend())
					{
					iServer->Send(*iMessage);
					}
				}
			break;
			}

		case EEikCmdExit:
			{
			Exit();
			break;
			}

		default:
			break;
		}
	}

/**
* Begin Client side communication.
*
* Find a Device
* Find Service on device and obtain Port information
* Pass to the Client to form a connection
* @param none
* @return none
*/
void CBluetoothChatAppUi::FindRemoteDeviceL()
	{
	iDeviceSearcher = CBluetoothDeviceSearcher::NewL(*this);
	iDeviceSelectionResponse = new (ELeave) TBTDeviceResponseParamsPckg();
	iDeviceSearcher->SelectDeviceL(*iDeviceSelectionResponse);
	}

void CBluetoothChatAppUi::DeviceFoundL(TInt result)
	{
	delete iDeviceSearcher;	// delete and cleanup
	iDeviceSearcher = 0;

	if (result == KErrNone)
		{
		TInt port = 0;
		CBluetoothServiceSearcher* serviceSearcher = CBluetoothServiceSearcher::NewLC(port);
		TInt serviceFound = serviceSearcher->FindServiceL((*iDeviceSelectionResponse)().BDAddr());
		CleanupStack::PopAndDestroy( serviceSearcher );

		if (serviceFound == KErrNone)
			{
			iClient->ConnectToServerL((*iDeviceSelectionResponse)().BDAddr(), port);
			}
		else
			{
			CAknGlobalNote* globalNote = CAknGlobalNote::NewLC();
			HBufC* warning = StringLoader::LoadLC(R_SERVICE_NOT_FOUND);
			globalNote->ShowNoteL(EAknGlobalWarningNote, *warning);
			CleanupStack::PopAndDestroy(globalNote);
			CleanupStack::PopAndDestroy(warning);

			// Permit clean up of Bluetooth server connection
			User::After(TTimeIntervalMicroSeconds32(KServerCleanupDelayMicroSeconds));
			}
		}

	delete iDeviceSelectionResponse;
	iDeviceSelectionResponse = 0;
	}

/**
* Begin Server side communication.
*
* Starts Server - this will start the server and configure the security settings
*
* @param none
* @return none
*/
void CBluetoothChatAppUi::StartReceivingL()
	{
	iServer->StartServerL();
	}


/**
* React to completion of server startup.
*
* Starts advertising on server
* Display a dialog box with the option to cancel this listening process
*
* @param none
* @return none
*/
void CBluetoothChatAppUi::ServerStartedL()
	{

	// start the server's advertiser.
	iServer->StartAdvertisingL();

	// display a dialog to allow a user to cancel listening if required.
	delete iWaitDialog;
	iWaitDialog = NULL;
	iWaitDialog = new (ELeave) CAknWaitDialog(NULL, ETrue);
	HBufC* waitingMessage = StringLoader::LoadLC(R_WAITING_MESSAGE);
	iWaitDialog->SetTextL(*waitingMessage);
	CleanupStack::PopAndDestroy(waitingMessage);
	TInt retVal = iWaitDialog->ExecuteLD(R_BLUETOOTH_CONNECTION_WAIT_DIALOG);
	iWaitDialog = NULL;

	if (retVal != EAknSoftkeyDone)
		{
		// User has cancelled this connection process
		iServer->StopL();
		}

	}


/**
* Connection Made.
*
* Server - Remove the Cancel dialog
* Client - Provide feedback that a connection has been made
* @param none
* @return none
*/
void CBluetoothChatAppUi::ConnectedL()
	{
	if (iWaitDialog)
		{
		iWaitDialog->ProcessFinishedL();
		iWaitDialog = NULL;
		}

	if (iClient->IsConnected())
		{
		CAknInformationNote* infoDialog = new (ELeave) CAknInformationNote();
		HBufC* message = StringLoader::LoadLC(R_CONNECTED);
		infoDialog->ExecuteLD(*message);
		CleanupStack::PopAndDestroy(message);
		}
	}

/**
* Provides a UI Text Query Dialog requesting message to be sent.
*
* @param none
* @return true if message was composed by user
*/
TBool CBluetoothChatAppUi::ComposeMessageL()
	{
	TBool retVal = EFalse;

	delete iMessage;
	iMessage = NULL;
	iMessage = HBufC::NewL(KMaxMessageLength);
	TPtr message = iMessage->Des();

	HBufC* titleBuf = StringLoader::LoadLC(R_CHAT_TITLE);
	CAknTextQueryDialog* messageDialog = new (ELeave) CAknTextQueryDialog(message, *titleBuf, CAknTextQueryDialog::ENoTone);
	CleanupStack::PopAndDestroy(titleBuf);
	messageDialog->SetMaxLength(KMaxMessageLength);

	if (messageDialog->ExecuteLD(R_BLUETOOTH_CHAT_MESSAGE_DIALOG))
		{
		retVal = ETrue;
		}

	return retVal;
	}

/**
* Display the message received from remote device.
* @param aMessage the message received
* @return none
*/
void CBluetoothChatAppUi::DataReceivedL(const TDesC& aMessage)
	{
	TBuf<KMaxMessageLength + KFormattedMessagePrefixLength> formattedMessage;
	formattedMessage.Append(KFormattedMessagePrefix);
	formattedMessage.Append(aMessage);
	CAknQueryDialog* queryDialog = new (ELeave) CAknQueryDialog(formattedMessage, CAknQueryDialog::ENoTone);

	if (queryDialog->ExecuteLD(R_BLUETOOTH_CHAT_REPLY_DIALOG) == EBluetoothReply)
		{
		HandleCommandL(EBluetoothChatSend);
		}
	}

/**
* Provide UI feedback of errors occured during communication
* @param aErrorCode code repesenting the error that occured
*/
void CBluetoothChatAppUi::HandleErrorL(TInt aErrorCode)
	{
	HBufC* message;

	switch (aErrorCode)
		{
		case (KErrDisconnected):
		case (KErrAbort):
			{
			message = StringLoader::LoadLC(R_DISCONNECTED);
			break;
			}

		case (KErrNotReady):
			{
			message = StringLoader::LoadLC(R_CONNECTION_LOST);
			break;
			}

		case (KErrCouldNotConnect):
			{
			message = StringLoader::LoadLC(R_COULD_NOT_CONNECT);
			break;
			}

		default:
			{
			message = StringLoader::LoadLC(R_UNKNOWN_ERROR);
			break;
			}
		}

	CAknWarningNote* errorDialog = new (ELeave) CAknWarningNote();
	errorDialog->ExecuteLD(*message);
	CleanupStack::PopAndDestroy(message);
	}

// End of File