examples/ForumNokia/Symbian_OS_End-to-End_Sockets_API_Example/SocketTaskManager/src/TaskManagerAppUi.cpp

/*
 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
 *    
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    
 *  * Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  * Neither the name of Nokia Corporation nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *    
 *    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 *    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 *    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 *    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *    OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *    
 *    Description:  
 */


// INCLUDE FILES
#include "TaskManager.pan"
#include "TaskManagerAppUi.h"
#include "TaskManagerAppView.h"
#include "TaskManager.hrh"
#include "TaskManagerEngine.h"
#include "TaskManagerConnForm.h"
#include "TaskManagerConnInfo.h"

#include <avkon.rsg>
#include <eikapp.h>

// CONSTANTS
_LIT(KSettingsFile, "socketsettings.txt");


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

// ----------------------------------------------------------
// CTaskManagerAppUi::ConstructL()
// 
// ----------------------------------------------------------
//
void CTaskManagerAppUi::ConstructL()
        {
        // load the menu, etc. configuration from the resources
    BaseConstructL(EAknEnableSkin);

    // create the AppView - the control that will be able to draw on the screen
    iAppView = CTaskManagerAppView::NewL(ClientRect(), *this);    
    
    // required e.g. to display scroll buttons
    iAppView->SetMopParent(this);

    // add the control to the control stack - it will receive key press events
    AddToStackL(iAppView);
    
    // create an engine that handles socket transactions and SMS notifications.
    iEngine = CTaskManagerEngine::NewL(*iAppView);

#ifdef __SERIES60_30__    
        // Only in 3rd Edition
    User::LeaveIfError( iEikonEnv->FsSession().CreatePrivatePath( EDriveC ) );
        User::LeaveIfError( iEikonEnv->FsSession().SetSessionToPrivate( EDriveC ) );

#else
        // Only in 2nd Edition
        #ifndef __WINS__  // don't save settings to z-drive in emulator
        TFileName appFullName = Application()->AppFullName();
        TParsePtr appPath(appFullName);
        iSettingsFile = appPath.DriveAndPath();
        #endif //__WINS__
#endif

    iSettingsFile.Append(KSettingsFile);

        // read settings    
    InternalizeConnInfoL();

        // Here we open the connections dialog. We needn't worry about the return
        // value because the dialog class has internal code that saves changes
        // to iConnectionInfo, if the user presses ok
    if (CTaskManagerConnForm::RunDlgLD( iConnectionInfo ))
        {
        iEngine->SetConnectionSettings(iConnectionInfo.ServerAddress(),
                                                                        iConnectionInfo.Port(),
                                                                        iConnectionInfo.Username(), 
                                                                        iConnectionInfo.Password());
        TUint32 iap;
#ifdef __SERIES60_30__    
                        // Set an empty IAP, the device itself handles the correct IAP
                iConnectionInfo.SetIap(iap);
                iEngine->SetIap(iap);
                iEngine->FetchTasksL();

#else
                // In 2nd Edition we need to do this manually
        
                // query the IAP to be used.
                if (iAppView->QueryIapL(iap, iConnectionInfo.Iap()))
                        {
                        iConnectionInfo.SetIap(iap);
                        iEngine->SetIap(iap);
                        iEngine->FetchTasksL();
                        }
#endif
                
        // save settings to file
        ExternalizeConnInfoL();
        }
        iEngine->SetAutomaticUpdateL(ETrue);
        }

// ----------------------------------------------------
// CTaskManagerAppUi::~CTaskManagerAppUi()
// Destructor
// Frees reserved resources
// ----------------------------------------------------
//
CTaskManagerAppUi::~CTaskManagerAppUi()
        {
    if (iAppView)
            {
        RemoveFromStack(iAppView);
        delete iAppView;
        iAppView = NULL;
            }
    delete iEngine;
        }

// ----------------------------------------------------
// CTaskManagerAppUi::HandleCommandL()
// takes care of command handling
// ----------------------------------------------------
//
void CTaskManagerAppUi::HandleCommandL(TInt aCommand)
        {
    switch(aCommand)
                {
        case EEikCmdExit:
        case EAknSoftkeyExit:
            Exit();
            break;

        case ETaskManagerConnectionSettingsCommand:
            {
            iUiBusy = ETrue;
            iEngine->SetAutomaticUpdateL(EFalse);
            
                        // Open the connections dialog
                        if (CTaskManagerConnForm::RunDlgLD( iConnectionInfo ))
                                {
                                TUint32 iap;
                                // if IAP not yet selected, query the user.
                                if (!iEngine->IapSet())
                                        {
                                        if (iAppView->QueryIapL(iap, iConnectionInfo.Iap()))
                                                {
                                                iConnectionInfo.SetIap(iap);
                                                iEngine->SetIap(iap);
                                                }
                                        }
                                // update the connection settings.
                                iEngine->SetConnectionSettings(iConnectionInfo.ServerAddress(),
                                                                                                iConnectionInfo.Port(),
                                                                                                iConnectionInfo.Username(), 
                                                                                                iConnectionInfo.Password());
                                
                                // save the connection settings to a file.
                                ExternalizeConnInfoL();
                                }
                                
                        iUiBusy = EFalse;
                        SetAutomaticUpdateL();
                }
                break;
        
                case ETaskManagerLoadTasksCommand:
                        iEngine->FetchTasksL();
                        break;
                        
                case EAknSoftkeyCancel:
                        iEngine->CancelTransaction();
                        break;

        default:
            Panic(ETaskManagerBasicUi);
            break;
        }
        }

// ----------------------------------------------------
// CTaskManagerAppUi::HandleForegroundEventL()
// Called when an application switches to, or from, the 
// foreground.
// ----------------------------------------------------
//              
void CTaskManagerAppUi::HandleForegroundEventL(TBool aForeground)
        {
        CAknAppUi::HandleForegroundEventL(aForeground);

        // when coming in to foreground, unpause the engine and load 
        // tasks if an update SMS has arrived while we were in the background
        if (aForeground)
                {
                SetAutomaticUpdateL();
                }
        // when going in to background, pause engine so that tasks are not 
        // downloaded automatically if an update SMS arrives.
        else
                {
                iEngine->SetAutomaticUpdateL(EFalse);
                }
        }

// ----------------------------------------------------
// CTaskManagerAppUi::Model()
// Returns a reference to the engine.
// ----------------------------------------------------
//      
CTaskManagerEngine& CTaskManagerAppUi::Model()
        {
        return *iEngine;
        }

// ----------------------------------------------------
// CTaskManagerAppUi::ShowConnectingCbaL()
// While a transaction is running, show only a 
// cancel button.
// ----------------------------------------------------
//      
void CTaskManagerAppUi::ShowConnectingCbaL(const TBool& aShow)
        {
        if (aShow)
                {
                Cba()->SetCommandSetL(R_AVKON_SOFTKEYS_CANCEL);
                }
        else
                {
                Cba()->SetCommandSetL(R_AVKON_SOFTKEYS_OPTIONS_EXIT);
                }
        Cba()->DrawNow();
        }

// ----------------------------------------------------
// CTaskManagerAppUi::InternalizeConnInfoL()
// Reads connection settings from a settings file.
// ----------------------------------------------------
//
void CTaskManagerAppUi::InternalizeConnInfoL()
        {
        RFs& fs = CCoeEnv::Static()->FsSession();
    RFileReadStream readStream;
    TInt error = readStream.Open(fs, iSettingsFile, EFileRead);
    readStream.PushL();
    TInt internalizationError = KErrNone;
    // if settings file existed, try to read settings.
    if (error == KErrNone)
        {
        TRAP(internalizationError, iConnectionInfo.InternalizeL(readStream);)
        }
    readStream.Pop();
    readStream.Release();

        // reading failed, settings file might be corrupted.    
    if (internalizationError != KErrNone)
        {
                User::LeaveIfError(fs.Delete(iSettingsFile));
        }

        }

// ----------------------------------------------------
// CTaskManagerAppUi::ExternalizeConnInfoL()
// Saves connection settings to a settings file.
// ----------------------------------------------------
//      
void CTaskManagerAppUi::ExternalizeConnInfoL()
        {
        RFs& fs = CCoeEnv::Static()->FsSession();
        RFileWriteStream writeStream;
        TInt error = writeStream.Open(fs, iSettingsFile, EFileWrite);
        // setting file did not exist, create one.
        if (error != KErrNone)
                {
                User::LeaveIfError(writeStream.Create(fs, iSettingsFile, EFileWrite));
                }
        writeStream.PushL();
        writeStream << iConnectionInfo;
        writeStream.CommitL();
        writeStream.Pop();
        writeStream.Release();
        }

// ----------------------------------------------------
// CTaskManagerAppUi::SetViewBusyL()
// AppView informs the AppUi that it is busy. While 
// AppView is busy, the engine does not update tasks.
// ----------------------------------------------------
//      
void CTaskManagerAppUi::SetViewBusyL(const TBool& aBusy)
        {
        iViewBusy = aBusy;
        if (aBusy)
                {
                iEngine->SetAutomaticUpdateL(EFalse);
                }
        else
                {
                SetAutomaticUpdateL();
                }
        }

// ----------------------------------------------------
// CTaskManagerAppUi::SetAutomaticUpdateL()
// If view and ui aren't busy, tasks can be loaded 
// automatically.
// ----------------------------------------------------
//              
void CTaskManagerAppUi::SetAutomaticUpdateL()
        {
        if (!iViewBusy && !iUiBusy)
                {
                iEngine->SetAutomaticUpdateL(ETrue);
                }
        }
        
// End of file

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