1 /*

     2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Controls the state of the zoom*

    15 */

    16 

    17 

    18 // Defining this will reduce the wait period between repeated

    19 // zoom in/out events being sent.  This is just a development

    20 // test feature.

    21 

    22 // INCLUDE FILES

    23 #include    "CamZoomModel.h"

    24 #include    "CamZoomPane.h"

    25 #include    "CamPSI.h"

    26 #include    "CamUtility.h"

    27 #include    "CamAppUi.h"

    28 

    29 // CONSTANTS

    30 

    31 // MACROS

    32 

    33 // LOCAL CONSTANTS AND MACROS

    34 

    35 // MODULE DATA STRUCTURES

    36 

    37 // LOCAL FUNCTION PROTOTYPES

    38 

    39 // FORWARD DECLARATIONS

    40 

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

    42 

    43 // -----------------------------------------------------------------------------

    44 // CCamZoomModel::CCamZoomModel

    45 // C++ default constructor can NOT contain any code, that

    46 // might leave.

    47 // -----------------------------------------------------------------------------

    48 //

    49 CCamZoomModel::CCamZoomModel( CCamAppController& aController, 

    50                               CCamZoomPane*      aPane ) 

    51   : iCurrentResolution( KErrNotReady ),

    52     iController( aController ),

    53     iPane( aPane )

    54   {

    55   }

    56 

    57 // -----------------------------------------------------------------------------

    58 // CCamZoomModel::ConstructL

    59 // Symbian 2nd phase constructor can leave.

    60 // -----------------------------------------------------------------------------

    61 //

    62 void CCamZoomModel::ConstructL()

    63     {    

    64     PRINT( _L( "Camera => CCamZoomModel::ConstructL " ) );

    65     

    66     // Retrieve the max digital zoom levels

    67     TPckgBuf <TCamMaxZoomSteps> pckg;

    68     CamUtility::GetPsiAnyL( ECamPsiMaxZoomSteps, &pckg );

    69     iDigZoomSteps = pckg();

    70 

    71     // Retrieve the max EXTENDED zoom levels

    72     TPckgBuf <TCamMaxZoomSteps> pckg2;

    73     CamUtility::GetPsiAnyL( ECamPsiMaxExtendedZoomSteps, &pckg2 );

    74     iExtZoomSteps = pckg2();

    75         

    76     // Retrieve the max OPTICAL zoom levels

    77     TPckgBuf <TCamMaxZoomSteps> pckg3;

    78     CamUtility::GetPsiAnyL( ECamPsiMaxOpticalZoomSteps, &pckg3 );

    79     iOptZoomSteps = pckg3();

    80 

    81     // Retrieve the timing and step values for each of the zoom bar 

    82     // modes for Optical/Digital/Extended    

    83     TPckgBuf <TCamZoomLAF> pckg4;

    84     CamUtility::GetPsiAnyL( ECamPsiZoomBarLAF, &pckg4);

    85     iZoomLAF = pckg4();

    86     

    87     // Setting up initial internal values for zoom levels

    88     iCurZoomStepOptical = 0;

    89     iCurZoomStepDigital = 0;        

    90 

    91     // Default zoom jump multiplier

    92     iZoomStepMultiplier = 1;

    93 

    94     // Timer used to give smooth zooming    

    95     iZoomTimer = CPeriodic::NewL( CActive::EPriorityHigh );          

    96     

    97     // Register for controller events

    98     iController.AddControllerObserverL( this );

    99     

   100     // Create Zoom Update manager, which is used to 

   101     // minimize the amount of times we send updates to

   102     // the camera driver.

   103     iCamZoomUpdateManager = CCamZoomUpdateManager::NewL( iController );

   104     

   105     // This class and zoom pane are created on application start.

   106     // On app start, we should be setting the zoom to 1x, to 

   107     // tidy up incase a previous app has not reset to defaults.

   108     ResetZoomTo1x();

   109     

   110     PRINT( _L( "Camera <= CCamZoomModel::ConstructL " ) );

   111     }

   112 

   113 // -----------------------------------------------------------------------------

   114 // CCamZoomModel::NewL

   115 // Two-phased constructor.

   116 // -----------------------------------------------------------------------------

   117 //

   118 CCamZoomModel* CCamZoomModel::NewL( CCamAppController& aController, CCamZoomPane* aPane )

   119     {

   120     CCamZoomModel* self = new( ELeave ) CCamZoomModel( aController, aPane );

   121     

   122     CleanupStack::PushL( self );

   123     self->ConstructL();

   124     CleanupStack::Pop();

   125 

   126     return self;

   127     }

   128 

   129 

   130 // -----------------------------------------------------------------------------

   131 // CCamZoomModel::~CCamZoomModel

   132 // Destructor.

   133 // -----------------------------------------------------------------------------

   134 //

   135 CCamZoomModel::~CCamZoomModel()

   136   {

   137   PRINT( _L("Camera => ~CCamZoomModel" ))  

   138   

   139   iController.RemoveControllerObserver( this );

   140   if ( iZoomTimer && iZoomTimer->IsActive() )

   141     {    

   142     iZoomTimer->Cancel();

   143     }

   144   delete iZoomTimer;    

   145   

   146   if ( iCamZoomUpdateManager && iCamZoomUpdateManager->IsActive() )

   147     {    

   148     iCamZoomUpdateManager->Cancel();

   149     }

   150   delete iCamZoomUpdateManager;    

   151     

   152   iPane = NULL;   // Not owned

   153   PRINT( _L("Camera <= ~CCamZoomModel" ))  

   154   }

   155 

   156 // -----------------------------------------------------------------------------

   157 // CCamZoomModel::ZoomTo

   158 // Attempts to zoom to a specified value.

   159 // -----------------------------------------------------------------------------

   160 //

   161 void CCamZoomModel::ZoomTo( TInt aValue )

   162     {    

   163     PRINT( _L( "Camera => CCamZoomModel::ZoomTo " ) );

   164     // Note: The following code only supports digital or 

   165     // digital+extended zoom combinations.  

   166     // Optical zoom is not taken into consideration.

   167     

   168     // avoid mixups between button and touch presses

   169     if ( ZoomingState() != ECamZoomModelStateZoomNone )

   170         {

   171         PRINT( _L( "Camera <> CCamZoomModel::ZoomTo stopping keypress zoom" ) );

   172         StopZoom();

   173         }

   174     

   175     // Start the zoom state

   176     iState = ECamZoomModelStateZoomTo;

   177     

   178     // We don't support pausing between boundaries.  If the 

   179     // user experience so requires, it should be implemented here.

   180      

   181     // Update the zoom values

   182     // Note: Both digital and extended zoom are represented by iCurZoomStepDigital.

   183     // We assume the maximum value is already checked 

   184     // in CCamZoomPane::StartTouchZoomL

   185     PRINT1( _L( "Camera <> CCamZoomModel::ZoomTo iMaxZoomStepDig=%d" ), iMaxZoomStepDig ); 

   186     PRINT1( _L( "Camera <> CCamZoomModel::ZoomTo iMaxZoomStepExt=%d" ), iMaxZoomStepExt ); 

   187     PRINT1( _L( "Camera <> CCamZoomModel::ZoomTo iCurZoomStepDigital=%d" ), iCurZoomStepDigital ); 

   188     iCurZoomStepDigital = aValue;

   189     if ( iCurZoomStepDigital < iMaxZoomStepDig )

   190         {

   191         CheckZoomMode( ECamZoomModeExtended );

   192         }

   193     else

   194         {

   195         CheckZoomMode( ECamZoomModeDigital );

   196         }

   197             

   198     // Notify the camera driver

   199     PRINT1( _L( "Camera <> CCamZoomModel::ZoomTo to (aValue) %d" ), aValue );

   200     iCamZoomUpdateManager->SetZoomValue( iCurZoomStepDigital );

   201     

   202     // Tell the zoom pane the value to show.

   203     PRINT1( _L( "CCamZoomModel::ZoomTo set zoom pane %d" ), CurrentZoom() );

   204     iPane->SetZoomValue( CurrentZoom() );

   205         

   206     // Clear the zoom state

   207     iState = ECamZoomModelStateZoomNone; 

   208                     

   209     PRINT( _L( "Camera <= CCamZoomModel::ZoomTo " ) );

   210     }

   211     

   212 // -----------------------------------------------------------------------------

   213 // CCamZoomModel::ZoomIn

   214 // Attempts to zoom in one step (if one more step available).

   215 // -----------------------------------------------------------------------------

   216 //

   217 void CCamZoomModel::ZoomIn( TBool aOneClick )

   218     {    

   219     PRINT( _L( "Camera => CCamZoomModel::ZoomIn " ) );

   220     iState = ECamZoomModelStateZoomIn;

   221     TInt optZoomJump = 0;

   222     TInt digZoomJump = 0;    

   223     TInt extZoomJump = 0;

   224     

   225     ZoomStepsToJump( optZoomJump, digZoomJump, extZoomJump );

   226     PRINT3( _L( "CCamZoomModel::ZoomIn steps opt(%d) dig(%d) ext(%d) " ), optZoomJump, digZoomJump, extZoomJump );

   227     

   228     // First of all, check what the current boundary condition is

   229     // then check if we need to pause at that boundary.

   230     PRINT( _L( "ZoomIn boundary check start" ) );

   231     

   232     TCamZoomBoundary boundary = CheckBoundary();

   233     if ( PauseAtBoundary( boundary ) )

   234         {        

   235         if ( iPauseState == EPauseStateNone )

   236             {

   237             PRINT( _L( "ZoomIn at boundary EPauseStateNone return" ) );

   238             // If this is a new pause, update the state and return

   239             // (no zoom allowed until release)

   240             iPauseState = EPauseStatePaused;

   241             return;

   242             }

   243         else if ( iPauseState == EPauseStatePaused )

   244             {

   245             PRINT( _L( "ZoomIn at boundary EPauseStatePaused return" ) );

   246             // If still paused, return (no zoom allowed until release)

   247             return;

   248             }

   249         else // EPauseStateReleased

   250             {

   251             PRINT( _L( "ZoomIn at boundary EPauseStateReleased allow" ) );

   252             // If released, allow the zoom, but set the state

   253             // back to none.  

   254             iPauseState = EPauseStateNone;

   255             }

   256         }

   257         

   258     PRINT( _L( "ZoomIn at boundary EPauseStateNone boundary check end" ) );

   259         

   260     if ( optZoomJump )        

   261         {

   262         CheckZoomMode( ECamZoomModeOptical );

   263         iCurZoomStepOptical += optZoomJump;

   264         PRINT1( _L( "Camera => CCamZoomModel::ZoomIn opt to %d" ), iCurZoomStepOptical );

   265         //iController.SetZoomValue( iCurZoomStepOptical );            

   266         iCamZoomUpdateManager->SetZoomValue( iCurZoomStepOptical );

   267         }

   268         

   269     if ( digZoomJump )        

   270         {

   271         CheckZoomMode( ECamZoomModeDigital );

   272         iCurZoomStepDigital += digZoomJump;

   273         PRINT1( _L( "Camera => CCamZoomModel::ZoomIn dig to %d" ), iCurZoomStepDigital );

   274         //iController.SetZoomValue( iCurZoomStepDigital );              

   275         iCamZoomUpdateManager->SetZoomValue( iCurZoomStepDigital );

   276         }

   277         

   278     if ( extZoomJump )

   279         {

   280         CheckZoomMode( ECamZoomModeExtended );

   281         iCurZoomStepDigital += extZoomJump;

   282         PRINT1( _L( "Camera => CCamZoomModel::ZoomIn ext to %d" ), iCurZoomStepDigital );

   283         //iController.SetZoomValue( iCurZoomStepDigital );              

   284         iCamZoomUpdateManager->SetZoomValue( iCurZoomStepDigital );

   285         }

   286 

   287     // Tell the zoom pane the value to show.

   288     PRINT1( _L( "CCamZoomModel::ZoomIn set zoom pane %d" ), CurrentZoom() );

   289     iPane->SetZoomValue( CurrentZoom() );

   290                     

   291     if ( aOneClick )

   292         {

   293         // Do not start zoom timer

   294         PRINT( _L( "CCamZoomModel::ZoomIn one click" ) );

   295         iState = ECamZoomModelStateZoomNone;

   296         }

   297     else

   298         {

   299         // Don't restart timer (Auto-stop) timer when no zoom was done

   300         if( optZoomJump || digZoomJump || extZoomJump )

   301             {

   302             // Start the timer to zoom-in again when timer expires

   303             PRINT( _L( "CCamZoomModel::ZoomIn start zoom timer" ) );

   304             StartZoomTimer();

   305             }

   306         else

   307             {

   308             PRINT( _L("Camera <> CCamZoomModel::ZoomOut - stopping zoom at boundary") );

   309             StopZoom();

   310             }

   311         }

   312     

   313     PRINT( _L( "Camera <= CCamZoomModel::ZoomIn " ) );

   314     }

   315 

   316 // ---------------------------------------------------------------------------

   317 // CCamZoomModel::CheckBoundary

   318 // Checks whether the next zoom operation will cross a zoom mode boundary.

   319 // For example from Optical to Digital or from Digital to Extended

   320 // ---------------------------------------------------------------------------

   321 //    

   322 CCamZoomModel::TCamZoomBoundary CCamZoomModel::CheckBoundary() const

   323     {

   324     PRINT( _L( "Camera => CCamZoomModel::CheckBoundary " ) );

   325     

   326     TCamZoomBoundary retVal = ECamZoomBoundaryNone;        

   327     

   328     TCamZoomMode modeBefore = CurrentZoomType();

   329     TCamZoomMode modeAfter  = CurrentZoomType( ZoomStepsToJump() );

   330     

   331     if ( modeBefore != modeAfter )

   332         {

   333         if ( modeBefore == ECamZoomModeOptical && modeAfter  == ECamZoomModeDigital ||

   334              modeBefore == ECamZoomModeDigital && modeAfter  == ECamZoomModeOptical )

   335             {

   336             PRINT( _L( "Camera <> CCamZoomModel::CheckBoundary ECamZoomBoundaryOptDig" ) );

   337             retVal = ECamZoomBoundaryOptDig;

   338             }

   339         else if ( modeBefore == ECamZoomModeExtended && modeAfter  == ECamZoomModeDigital ||

   340                   modeBefore == ECamZoomModeDigital && modeAfter  == ECamZoomModeExtended )

   341             {

   342             PRINT( _L( "Camera <> CCamZoomModel::CheckBoundary ECamZoomBoundaryDigExt" ) );

   343             retVal = ECamZoomBoundaryDigExt;

   344             }        

   345         else

   346             {

   347             // Undefined boundary, should not allow further zooming

   348             PRINT( _L( "Camera <> CCamZoomModel::CheckBoundary ECamZoomBoundaryUndefined" ) );

   349             retVal = ECamZoomBoundaryUndefined;

   350             }

   351         }

   352      else

   353         {

   354         PRINT( _L( "Camera <> CCamZoomModel::CheckBoundary ECamZoomBoundaryNone" ) );

   355         retVal = ECamZoomBoundaryNone;

   356         }

   357     

   358     PRINT( _L( "Camera <= CCamZoomModel::CheckBoundary " ) );

   359     return retVal;   

   360     }

   361     

   362     

   363 // ---------------------------------------------------------------------------

   364 // CCamZoomModel::ZoomStepsToJump

   365 // Returns the total number of zoom steps to jump based on the current 

   366 // zoom mode (opt/dig/ext). Does not break these steps into optical/digital

   367 // steps to jump, as may be the case on a boundary.

   368 // ---------------------------------------------------------------------------

   369 //      

   370 TInt CCamZoomModel::ZoomStepsToJump() const

   371     {      

   372     PRINT( _L( "Camera => CCamZoomModel::ZoomStepsToJump " ) );

   373     

   374     TInt steps = 0;

   375     

   376     if ( iController.ActiveCamera() == ECamActiveCameraPrimary )    

   377         {            

   378         // Works out the current zoom mode (opt/dig/ext)

   379         TCamZoomMode mode = CurrentZoomType();    

   380         PRINT1( _L( "Camera <> CCamZoomModel::ZoomStepsToJump mode = %d" ), mode );

   381         

   382         if ( mode == ECamZoomModeOptical )

   383             {        

   384             steps = iZoomLAF.iZoomStepsOpt;

   385             PRINT1( _L( "Camera <> CCamZoomModel::ZoomStepsToJump ECamZoomModeOptical steps = %d" ), steps );

   386             }

   387         else if ( mode == ECamZoomModeDigital )

   388             {

   389             steps = iZoomLAF.iZoomStepsDig;

   390             PRINT1( _L( "Camera <> CCamZoomModel::ZoomStepsToJump ECamZoomModeDigital steps = %d" ), steps );

   391             }

   392         else if ( mode == ECamZoomModeExtended )    

   393             {

   394             steps = iZoomLAF.iZoomStepsExt;

   395             PRINT1( _L( "Camera <> CCamZoomModel::ZoomStepsToJump ECamZoomModeExtended steps = %d" ), steps );

   396             }    

   397         else

   398             {

   399             steps = 0;            

   400             }   

   401         }

   402     else if ( iController.ActiveCamera() == ECamActiveCameraSecondary )

   403         {

   404         //steps = K2ndCamZoomStepSize;

   405         steps = iZoomLAF.iSecondCameraZoomSteps;

   406         PRINT1( _L( "Camera <> CCamZoomModel::ZoomStepsToJump K2ndCamZoomStepSize steps = %d" ), steps );

   407         }

   408     else

   409         {            

   410         }

   411         

   412         

   413     if ( iState == ECamZoomModelStateZoomOut )        

   414         {

   415         steps = -steps;    

   416         PRINT1( _L( "Camera <> CCamZoomModel::ZoomStepsToJump Inverse, since ZoomOut: steps = %d" ), steps );

   417         }

   418         

   419     PRINT( _L( "Camera <= CCamZoomModel::ZoomStepsToJump " ) );

   420     return steps;                           

   421     }

   422 

   423 // ---------------------------------------------------------------------------

   424 // CCamZoomModel::ZoomStepsToJump

   425 // Returns the number of Optical, Digital and Extended zoom steps to jump

   426 // ---------------------------------------------------------------------------

   427 //  

   428 void CCamZoomModel::ZoomStepsToJump( TInt& aOpt, TInt& aDig, TInt& aExt ) const

   429     {  

   430     PRINT( _L( "Camera => CCamZoomModel::ZoomStepsToJump (by reference)" ) );

   431     

   432     TInt steps = iZoomStepMultiplier * ZoomStepsToJump();

   433 

   434     TCamZoomBoundary boundary = CheckBoundary();

   435     

   436     // If jumping this number of steps will make us cross the boundary, 

   437     // we need to split the steps up into the composite opt/dig steps.

   438     // Depending on if we are pausing or not, we may not want to cross

   439     // the boundary yet

   440     if ( boundary == ECamZoomBoundaryOptDig )

   441         {

   442         if ( iState == ECamZoomModelStateZoomIn )

   443             {

   444             // Zooming in, then assign what we can to Optical, to get to max step

   445             // any remainder then goes to digital

   446             TInt optJumpMax = iMaxZoomStepOpt - iCurZoomStepOptical;

   447             aOpt = optJumpMax;

   448             aDig = steps - optJumpMax;

   449             

   450             // If the zoom in was going to take the digital zoom beyond the max

   451             // allowed, clip it

   452             if ( aDig > iMaxZoomStepDig )

   453                 aDig = iMaxZoomStepDig;

   454             }

   455         else if ( iState == ECamZoomModelStateZoomOut )        

   456             {

   457             // Zooming out, then assign what we can to Digital, to get to min step

   458             // any remainder then goes to optical            

   459             aDig = -iCurZoomStepDigital;                

   460             aOpt = steps + iCurZoomStepDigital; // zooming out, steps is -ve

   461             }

   462 		else

   463 			{

   464 			// Lint

   465 			}

   466         }

   467     else if ( boundary == ECamZoomBoundaryDigExt )

   468         {

   469         if ( iState == ECamZoomModelStateZoomIn )

   470             {

   471             // Zooming in, then assign what we can to Optical, to get to max step

   472             // any remainder then goes to digital

   473             TInt digJumpMax = iMaxZoomStepDig - iCurZoomStepDigital;

   474             aDig = digJumpMax;

   475             aExt = steps - digJumpMax;

   476             

   477             // If the zoom in was going to take the digital zoom beyond the max

   478             // allowed, clip it

   479             if ( aExt > iMaxZoomStepExt )

   480                 aExt = iMaxZoomStepExt;            

   481             }

   482         else if ( iState == ECamZoomModelStateZoomOut )        

   483             {

   484             // Zooming out, then assign what we can to Digital, to get to min step

   485             // any remainder then goes to optical            

   486             //aDig = iCurZoomStepDigital;

   487             aDig = steps;

   488             //aExt = steps - iCurZoomStepDigital;                            

   489             }

   490         else

   491         	{

   492         	// Lint

   493         	}

   494         }        

   495     else if ( boundary == ECamZoomBoundaryNone )

   496         {

   497         // No boundary crossed.  Can assign the steps to the current

   498         // mode        

   499         TCamZoomMode mode = CurrentZoomType();

   500         

   501         if ( iState == ECamZoomModelStateZoomIn )

   502             {           

   503             if ( mode == ECamZoomModeOptical && AllowOptZoom() )

   504                 {

   505                 aOpt = steps;

   506                 if ( iCurZoomStepOptical + aOpt > iMaxZoomStepOpt )

   507                     {

   508                     aOpt = iMaxZoomStepOpt - iCurZoomStepOptical;                            

   509                     }                    

   510                 }

   511             else if ( mode == ECamZoomModeDigital && AllowDigZoom() )

   512                 {

   513                 aDig = steps;    

   514                 if ( iCurZoomStepDigital + aDig > iMaxZoomStepDig )

   515                     {

   516                     aDig = iMaxZoomStepDig - iCurZoomStepDigital;                

   517                     }                    

   518                 }

   519             else if ( mode == ECamZoomModeExtended && AllowExtZoom() )

   520                 {

   521                 aExt = steps;                        

   522                 if ( iCurZoomStepDigital + aExt > iMaxZoomStepExt )

   523                     {

   524                     aExt = iMaxZoomStepExt - iCurZoomStepDigital;    

   525                     }                    

   526                 }               

   527             else

   528                 {

   529                 // Do nothing (as invalid state)

   530                 }                                             

   531             }

   532         else if ( iState == ECamZoomModelStateZoomOut ) 

   533             {                

   534             if ( mode == ECamZoomModeOptical && AllowOptZoom() )

   535                 {

   536                 aOpt = steps;

   537                 if ( iCurZoomStepOptical + aOpt < 0 )

   538                     {

   539                     aOpt = -iCurZoomStepOptical;                            

   540                     }                    

   541                 }

   542             else if ( mode == ECamZoomModeDigital && AllowDigZoom() )

   543                 {

   544                 aDig = steps;    

   545                 if ( iCurZoomStepDigital + aDig < 0 )

   546                     {

   547                     aDig = -iCurZoomStepDigital;                

   548                     }                    

   549                 }

   550             else if ( mode == ECamZoomModeExtended && AllowExtZoom() )

   551                 {

   552                 aExt = steps;                        

   553                 if ( iCurZoomStepDigital + aExt < iMaxZoomStepDig )

   554 					{

   555                     aExt = iMaxZoomStepDig - iCurZoomStepDigital;

   556 					}

   557                 }        

   558             else

   559                 {

   560                 // Do nothing (as invalid state)

   561                 }                        

   562             }

   563 		else

   564 			{

   565 			// Lint

   566 			}            

   567         }       

   568     else // ECamZoomBoundaryUndefined

   569         {

   570         // If undefined boundary, this would result in an invalid

   571         // zoom valid if we zoom, so set all steps to zero.        

   572         // This will stop any zoom operation from changing state.

   573         aOpt = 0;

   574         aDig = 0;

   575         aExt = 0;

   576         }

   577         

   578     PRINT( _L( "Camera <= CCamZoomModel::ZoomStepsToJump " ) );

   579     }

   580     

   581     

   582 // ---------------------------------------------------------------------------

   583 // CCamZoomModel::CurrentZoomType

   584 // Returns the zoom type (opt/dig/ext) based on current zoom levels modified

   585 // by the specified optical/digital valies

   586 // ---------------------------------------------------------------------------

   587 //   

   588 TCamZoomMode CCamZoomModel::CurrentZoomType( TInt aStepModifier ) const

   589     {

   590     PRINT( _L( "Camera => CCamZoomModel::CurrentZoomType " ) );

   591     

   592     TInt maxOptZoomStep = ( iMaxZoomStepOpt == KErrNotSupported || !AllowOptZoom() )? 0 : iMaxZoomStepOpt;

   593     TInt maxStdZoomStep = ( iMaxZoomStepDig == KErrNotSupported || !AllowDigZoom() )? maxOptZoomStep : maxOptZoomStep + iMaxZoomStepDig;

   594     TInt maxExtZoomStep = ( iMaxZoomStepExt == KErrNotSupported || !AllowExtZoom() )? maxStdZoomStep : maxStdZoomStep + iMaxZoomStepExt;   

   595     

   596     // 

   597     TInt step = CurrentZoom() + aStepModifier;    

   598         

   599     // Optical runs from step 0 to maxOptZoomStep

   600     if ( step <= maxOptZoomStep && // Not at max opt zoom level        

   601          AllowOptZoom() )          // ... and optical zoom is allowed        

   602         {

   603         PRINT( _L( "Camera <= CCamZoomModel::CurrentZoomType ECamZoomModeOptical" ) );

   604         return ECamZoomModeOptical;

   605         }

   606     // Digital runs from maxOptZoomStep to maxOptZoomStep+maxStdZoomStep

   607     else if ( step >= maxOptZoomStep &&

   608               step <= maxStdZoomStep && // Inside std zoom step limits

   609               AllowDigZoom() )          // ...and is allowed by user setting

   610         {

   611         PRINT( _L( "Camera <= CCamZoomModel::CurrentZoomType ECamZoomModeDigital" ) );

   612         return ECamZoomModeDigital;

   613         }

   614     // Extended runs from maxOptZoomStep+maxStdZoomStep to maxOptZoomStep+maxStdZoomStep        

   615     else if ( step >= maxStdZoomStep &&

   616               step <= maxExtZoomStep &&   // Inside ext zoom step limits

   617               AllowExtZoom() )            // ...and ext zoom is allowed by user

   618         {

   619         PRINT( _L( "Camera <= CCamZoomModel::CurrentZoomType ECamZoomModeExtended" ) );

   620         return ECamZoomModeExtended;

   621         }

   622     else

   623         {

   624         PRINT( _L( "Camera <= CCamZoomModel::CurrentZoomType ECamZoomModeUndefined" ) );

   625         return ECamZoomModeUndefined;

   626         }                   

   627     }

   628 

   629 // -----------------------------------------------------------------------------

   630 // CCamZoomModel::ZoomOut

   631 // Attempts to zoom out one step (if one more step available).

   632 // -----------------------------------------------------------------------------

   633 //

   634 void CCamZoomModel::ZoomOut( TBool aOneClick )

   635     {        

   636     PRINT( _L( "Camera => CCamZoomModel::ZoomOut " ) );

   637     iState = ECamZoomModelStateZoomOut;

   638     TInt optZoomJump = 0;

   639     TInt digZoomJump = 0;    

   640     TInt extZoomJump = 0; 

   641     

   642     ZoomStepsToJump( optZoomJump, digZoomJump, extZoomJump );

   643     PRINT3( _L( "CCamZoomModel::ZoomOut steps opt(%d) dig(%d) ext(%d) " ), optZoomJump, digZoomJump, extZoomJump );

   644     

   645     if ( optZoomJump )        

   646         {

   647         CheckZoomMode( ECamZoomModeOptical );

   648         iCurZoomStepOptical += optZoomJump;

   649         PRINT1( _L( "Camera => CCamZoomModel::ZoomOut opt to %d" ), iCurZoomStepOptical );

   650         //iController.SetZoomValue( iCurZoomStepOptical );            

   651         iCamZoomUpdateManager->SetZoomValue( iCurZoomStepOptical );

   652         }

   653         

   654     if ( digZoomJump )        

   655         {

   656         CheckZoomMode( ECamZoomModeDigital );

   657         iCurZoomStepDigital += digZoomJump;

   658         PRINT1( _L( "Camera => CCamZoomModel::ZoomOut dig to %d" ), iCurZoomStepDigital );

   659         //iController.SetZoomValue( iCurZoomStepDigital );              

   660         iCamZoomUpdateManager->SetZoomValue( iCurZoomStepDigital );

   661         }

   662         

   663     if ( extZoomJump )

   664         {

   665         CheckZoomMode( ECamZoomModeExtended );

   666         iCurZoomStepDigital += extZoomJump;

   667         PRINT1( _L( "Camera => CCamZoomModel::ZoomOut ext to %d" ), iCurZoomStepDigital );

   668         //iController.SetZoomValue( iCurZoomStepDigital );           

   669         iCamZoomUpdateManager->SetZoomValue( iCurZoomStepDigital );   

   670         }    

   671 

   672     // Tell the zoom pane the value to show.

   673     PRINT1( _L( "ZoomOut set zoom pane %d" ), CurrentZoom() );

   674     iPane->SetZoomValue( CurrentZoom() );    

   675 

   676     if ( aOneClick )

   677         {

   678         // Do not start zoom timer

   679         PRINT( _L( "CCamZoomModel::ZoomIn one click" ) );

   680         iState = ECamZoomModelStateZoomNone;

   681         }

   682     else

   683         {

   684         // Don't restart timer (auto-stop) timer when no zoom was done

   685         if( optZoomJump || digZoomJump || extZoomJump )

   686             {

   687             // Start the timer to zoom-in again when timer expires

   688             PRINT( _L( "CCamZoomModel::ZoomIn start zoom timer" ) );

   689             StartZoomTimer();

   690             }

   691         else

   692             {

   693             PRINT( _L("Camera <> CCamZoomModel::ZoomOut - stopping zoom at boundary") );

   694             StopZoom();

   695             }

   696         }

   697     

   698     PRINT( _L( "Camera <= CCamZoomModel::ZoomOut " ) );

   699     }

   700 

   701 // -----------------------------------------------------------------------------

   702 // CCamZoomModel::CheckZoomMode

   703 // Checks to see if the zoom mode needs to be changed.

   704 // The purpose is to avoid unneccessary calls to SetZoomMode where possible

   705 // -----------------------------------------------------------------------------

   706 //

   707 void CCamZoomModel::CheckZoomMode( TCamZoomMode aMode )

   708   {

   709   PRINT( _L( "Camera => CCamZoomModel::CheckZoomMode " ) );

   710   if ( iZoomMode             != aMode 

   711     && ECamZoomModeUndefined != aMode )

   712     {

   713     //iController.SetZoomMode( aMode );

   714     PRINT2( _L( "Camera <> CCamZoomModel::CheckZoomMode iZoomMode changed (%d) -> (%d) " ), aMode, iZoomMode );

   715     iZoomMode = aMode;

   716     }

   717   PRINT( _L( "Camera <= CCamZoomModel::CheckZoomMode " ) );  

   718   }

   719 

   720 // -----------------------------------------------------------------------------

   721 // CCamZoomModel::RefreshSettings

   722 // Checks the current state of the Camera application, and adjusts the min/max

   723 // range of the zoom pane accordingly.

   724 // -----------------------------------------------------------------------------

   725 //

   726 void CCamZoomModel::RefreshSettings()

   727   {

   728   PRINT( _L("Camera => CCamZoomModel::RefreshSettings") );

   729   // If there is no active camera yet, or engine is not 

   730   // in a prepared state yet, do not try to refresh settings

   731   // as we can't work out what to base it on.

   732 

   733   // <CAMERAAPP_CAPI_V2_MIGRATION/>

   734   if( iController.ActiveCamera() == ECamActiveCameraNone 

   735    || !( iCameraState & (ECamImageOn|ECamVideoOn) ) 

   736     ) 

   737     {

   738     return;

   739     }        

   740 

   741   // Cache the current resolution to be used when 

   742   // determining zoom limits and steps.

   743   ReadCurrentResolution();      

   744 

   745   // Read settings to update internal state        

   746   ReadOpticalZoomSetting();

   747   ReadDigitalZoomSetting();

   748 

   749   iMaxZoomStepOpt = MaxZoomStep( iOptZoomSteps );

   750   iMaxZoomStepDig = MaxZoomStep( iDigZoomSteps );

   751   iMaxZoomStepExt = MaxZoomStep( iExtZoomSteps );

   752       

   753   iMaxZoomStep = 0;

   754 

   755   PRINT3( _L("Camera <> CCamZoomModel: max steps opt:%d dig:%d ext:%d"), iMaxZoomStepOpt, iMaxZoomStepDig, iMaxZoomStepExt );

   756 

   757   if ( AllowOptZoom() )

   758     {        

   759     iMaxZoomStep += iMaxZoomStepOpt;        

   760     }

   761     

   762   // Check if Digital zoom is allowed

   763   if ( AllowDigZoom() )

   764     {                

   765     // Check if EXTENDED zoom is allowed by user setting

   766     // and the value is valid.  For secondary camera, it may

   767     // be that it is not supported.

   768     if ( AllowExtZoom() ) // done in AllowExtZoom: && iMaxZoomStepExt != KErrNotSupported)

   769       {                                        

   770       iMaxZoomStep += iMaxZoomStepExt;        

   771       }

   772     else

   773       {            

   774       iMaxZoomStep += iMaxZoomStepDig;        

   775       }

   776     }

   777 

   778   TInt optSteps = ( AllowOptZoom() ) ? iMaxZoomStepOpt : 0; 

   779   TInt stdSteps = ( AllowDigZoom() ) ? iMaxZoomStepDig : 0;

   780   TInt extSteps = ( AllowExtZoom() ) ? Max( (iMaxZoomStepExt - iMaxZoomStepDig), 0 ) : 0;

   781           

   782   // Check that the max zoom is within (possibly new) limits

   783   CheckZoomLimit();

   784   

   785   if ( iPane )

   786     {

   787     // Inform the zoom pane of the new range of zoom steps

   788     iPane->SetZoomRange( 0, iMaxZoomStep ); 

   789     iPane->SetZoomSteps( optSteps, stdSteps, extSteps );        

   790     iPane->SetZoomValue( CurrentZoom() );

   791     }

   792 

   793   PRINT( _L("Camera <= CCamZoomModel::RefreshSettings") );

   794   }

   795     

   796     

   797 // -----------------------------------------------------------------------------

   798 // CCamZoomModel::ReadDigitalZoomSetting

   799 // Updates the setting for digital/extended zoom or not depending if user 

   800 // setting for it is on AND we have a valid setting for it.

   801 // -----------------------------------------------------------------------------

   802 //    

   803 void CCamZoomModel::ReadDigitalZoomSetting()

   804     {        

   805     iZoomSetting = static_cast<TCamSettingsDigitalZoom>(

   806         iController.IntegerSettingValue( ECamSettingItemPhotoDigitalZoom ) );    

   807     }

   808 

   809 

   810 

   811 // -----------------------------------------------------------------------------

   812 // CCamZoomModel::ReadOpticalZoomSetting

   813 // Reads whether optical zoom is allowed

   814 // -----------------------------------------------------------------------------

   815 //    

   816 void CCamZoomModel::ReadOpticalZoomSetting()

   817     {     

   818     }    

   819     

   820     

   821 // -----------------------------------------------------------------------------

   822 // CCamZoomModel::CheckZoomLimit

   823 // Checks whether the current zoom level is too great for the limits.

   824 // This can happen if the resolution is changed, as this may result in new limits

   825 // The zoom level should be cropped to where appropriate

   826 // -----------------------------------------------------------------------------

   827 //      

   828 void CCamZoomModel::CheckZoomLimit()

   829     {    

   830     TInt maxOptZoomStep = MaxZoomStep( iOptZoomSteps );

   831     TInt maxStdZoomStep = MaxZoomStep( iDigZoomSteps );

   832     TInt maxExtZoomStep = MaxZoomStep( iExtZoomSteps );

   833 

   834     if ( AllowOptZoom() &&                      // If settings allow optical zoom, 

   835          iCurZoomStepOptical > maxOptZoomStep ) // ...and value now too high

   836         {

   837         iCurZoomStepOptical = maxOptZoomStep;

   838         // iController.SetZoomMode ( ECamZoomModeOptical );

   839         iController.SetZoomValue( iCurZoomStepOptical );                                         

   840         }

   841 

   842     if ( AllowDigZoom()                        // If digital zoom is allowed

   843       && iCurZoomStepDigital > maxStdZoomStep  // and value now too high

   844       && !AllowExtZoom() )                     // and extended not allowed

   845         {

   846         // If we get here, digital zoom IS allowed, but extended isn't

   847         // and the digital zoom is too high.

   848         iCurZoomStepDigital = maxStdZoomStep;

   849         //iController.SetZoomMode ( ECamZoomModeDigital );

   850         iController.SetZoomValue( iCurZoomStepDigital );                                                        

   851         }

   852     else if ( AllowExtZoom()                         // If extended digitial zoom is allowed

   853            && iCurZoomStepDigital > maxExtZoomStep ) // but over the max extended range

   854         {        

   855         iCurZoomStepDigital = maxExtZoomStep;

   856         // iController.SetZoomMode ( ECamZoomModeDigital );

   857         iController.SetZoomValue( iCurZoomStepDigital );                                                                    

   858         }

   859     // otherwise, do nothing

   860     else

   861         {

   862         // empty statement to remove Lint error.

   863         }

   864         

   865     // If we have had to manually set the mode and value of zoom, 

   866     // make sure that the zoom mode is still set to what internal state

   867     // dictates it should be.    

   868 

   869     /*

   870     if ( iZoomMode == ECamZoomModeOptical )

   871         {

   872         iController.SetZoomMode( ECamZoomModeOptical );

   873         }

   874     else if ( iZoomMode == ECamZoomModeDigital ||

   875               iZoomMode == ECamZoomModeExtended )

   876         {

   877         iController.SetZoomMode( ECamZoomModeDigital );

   878         }            

   879     // otherwise, do nothing

   880     else

   881         {

   882         // empty statement to remove Lint error.

   883     */

   884     }

   885  

   886 // -----------------------------------------------------------------------------

   887 // CCamZoomModel::ResetZoomTo1x

   888 // Resets the zoom level to 1x.

   889 // -----------------------------------------------------------------------------

   890 //    

   891 void CCamZoomModel::ResetZoomTo1x()

   892   {

   893   PRINT( _L( "Camera => CCamZoomModel::ResetZoomTo1x " ) );

   894   // Recalculates the min/max values for the zoom pane and

   895   // forwards them to the control.

   896   RefreshSettings();        

   897   

   898   // Reset the actual values used by the engine

   899   iCurZoomStepOptical = 0;

   900   iCurZoomStepDigital = 0;

   901   

   902   iZoomMode = ECamZoomModeUndefined;

   903   

   904   // Only digital mode supported for now.        

   905   //iController.SetZoomMode( ECamZoomModeDigital );

   906   iController.SetZoomValue( iCurZoomStepDigital );                                

   907   if ( iPane )

   908     {

   909     iPane->SetZoomValue( 0 );

   910     iPane->MakeVisible( EFalse, EFalse );

   911     }

   912     

   913   PRINT( _L( "Camera <= CCamZoomModel::ResetZoomTo1x " ) );

   914   }        

   915         

   916 

   917 // -----------------------------------------------------------------------------

   918 // CCamZoomModel::MaxZoomStep

   919 // Returns the maximum zoom step for the supplied step array 

   920 // (optical/digital/extended), based on current camera state.

   921 // -----------------------------------------------------------------------------

   922 //

   923 TInt CCamZoomModel::MaxZoomStep( const TCamMaxZoomSteps& aStepArray ) const

   924     {        

   925     PRINT( _L( "Camera => CCamZoomModel::MaxZoomStep " ) );

   926     

   927     TInt maxStep = KErrNotSupported;

   928     if ( iCameraState & ECamImageOn )

   929         {                

   930         // TCamPhotoSizeId  sizeId = iController.GetCurrentImageResolution();

   931         TCamActiveCamera camera = iController.ActiveCamera();

   932         if ( ECamActiveCameraPrimary == camera )

   933             {

   934             // switch ( sizeId )

   935             switch ( iCurrentResolution )

   936                 {

   937                 case ECamPhotoSizeVGA:       // 640 x 480

   938                     maxStep = aStepArray.iMaxPhotoStepVGA;

   939                     break;

   940                 case ECamPhotoSizeXGA: 	// 0.8MegaPixel (1024 x 768 )

   941                     maxStep = aStepArray.iMaxPhotoStep0_8MP;

   942                     break;

   943                 case ECamPhotoSize1MP:

   944                     maxStep = aStepArray.iMaxPhotoStep1MP;

   945                     break;

   946                 case ECamPhotoSize1_3MP:     // 1280x960

   947                     maxStep = aStepArray.iMaxPhotoStep1_3MP;

   948                     break;

   949                 case ECamPhotoSize2MP:       // 1600x1200

   950                     maxStep = aStepArray.iMaxPhotoStep2MP;

   951                     break;

   952                 case ECamPhotoSize3MP:       // 

   953                     maxStep = aStepArray.iMaxPhotoStep3MP;

   954                     break;  

   955                 case ECamPhotoSize5MP:

   956                     maxStep = aStepArray.iMaxPhotoStep5MP;

   957                     break;

   958                 case ECamPhotoSize8MP:

   959                     maxStep = aStepArray.iMaxPhotoStep8MP;

   960                     break;                    

   961                 case ECamPhotoSize12MP:

   962                     maxStep = aStepArray.iMaxPhotoStep12MP;

   963                     break;

   964                 case ECamPhotoSizeW6MP: // 3264x1832

   965                     maxStep = aStepArray.iMaxPhotoStepW6MP;

   966                     break;                    

   967                 case ECamPhotoSizeW9MP: // 4000x2248

   968                     maxStep = aStepArray.iMaxPhotoStepW9MP;

   969                     break;                    

   970                 default: 

   971                     break;

   972                 }                

   973             }

   974         else if ( ECamActiveCameraSecondary == camera  )

   975             {

   976             maxStep = aStepArray.iMax2ndCamPhotoStep;

   977             }  

   978         // otherwise, do nothing

   979         else

   980             {

   981             // empty statement to remove Lint error.

   982             }      

   983         }

   984     else if ( iCameraState & ECamVideoOn )

   985         {

   986         // TCamVideoResolution resId = iController.GetCurrentVideoResolution();        

   987 

   988         if ( iController.ActiveCamera() == ECamActiveCameraPrimary )

   989             {        

   990             // switch ( resId )

   991             switch ( iCurrentResolution )            

   992                 {

   993                 case ECamVideoResolutionSubQCIF:     // Small (128 x 96)

   994                     maxStep = aStepArray.iMaxVideoStepSQCIF;

   995                     break;

   996                 case ECamVideoResolutionQCIF:        // Medium (176 x 144)

   997                     maxStep = aStepArray.iMaxVideoStepQCIF;

   998                     break;

   999                 case ECamVideoResolutionCIF:         // Large (352 x 288) (Default)

  1000                     maxStep = aStepArray.iMaxVideoStepCIF;

  1001                     break;            

  1002                 case ECamVideoResolutionVGA:         // VGA (640 x 480)

  1003                     maxStep = aStepArray.iMaxVideoStepVGA;            

  1004                     break;            

  1005                 case ECamVideoResolutionQVGA:         // QVGA ( 320 x 240 )

  1006                     maxStep = aStepArray.iMaxVideoStepQVGA;

  1007                     break;                                        

  1008                 case ECamVideoResolutionNHD:         // NHD ( 640 x 352 )

  1009                     maxStep = aStepArray.iMaxVideoStepNHD;

  1010                     break;                                            

  1011                 case ECamVideoResolutionWVGA:         // WVGA ( 864 x 480 )

  1012                     maxStep = aStepArray.iMaxVideoStepWVGA;

  1013                     break;                                                

  1014                 case ECamVideoResolutionHD:           // HD ( 1280 x 720 )

  1015                     maxStep = aStepArray.iMaxVideoStepHD;

  1016                     break;                                                

  1017                 default: 

  1018                     break;

  1019                 }

  1020             }

  1021         else if ( iController.ActiveCamera() == ECamActiveCameraSecondary )

  1022             {

  1023             switch ( iCurrentResolution )

  1024                 {

  1025                 case ECamVideoResolutionCIF:         // Large (352 x 288) (Default)

  1026                     maxStep = aStepArray.iMax2ndCamVideoStepCIF;

  1027                     break;

  1028                 case ECamVideoResolutionQCIF:        // Medium (176 x 144)

  1029                     maxStep = aStepArray.iMax2ndCamVideoStepQCIF;

  1030                     break;

  1031                 case ECamVideoResolutionSubQCIF:     // Small (128 x 96)

  1032                     maxStep = aStepArray.iMax2ndCamVideoStepSQCIF;

  1033                     break;

  1034                 default:

  1035                     break;

  1036                 }                        

  1037             }  

  1038         // otherwise, do nothing

  1039         else

  1040             {

  1041             // empty statement to remove Lint error.

  1042             }      

  1043         }                

  1044     // otherwise, do nothing

  1045     else

  1046         {

  1047         // empty statement to remove Lint error.

  1048         }

  1049 

  1050     PRINT1( _L( "Camera <= CCamZoomModel::MaxZoomStep maxStep=%d" ), maxStep );

  1051     return maxStep;

  1052     }

  1053 

  1054 

  1055     

  1056 

  1057 // -----------------------------------------------------------------------------

  1058 // CCamZoomModel::StopZoom

  1059 // Called when the user releases the zoom key to stop an ongoing zoom operation.

  1060 // -----------------------------------------------------------------------------

  1061 //

  1062 void CCamZoomModel::StopZoom()

  1063     {    

  1064     PRINT( _L( "Camera => CCamZoomModel::StopZoom " ) );

  1065     

  1066     if ( iZoomTimer->IsActive() )

  1067         {

  1068         iZoomTimer->Cancel();

  1069         }

  1070 

  1071     // Clear the zoom state

  1072     iState = ECamZoomModelStateZoomNone;

  1073 

  1074     // Reset zoom multiplier

  1075     iZoomStepMultiplier = 1;

  1076 

  1077     if ( iPauseState == EPauseStatePaused )

  1078         {

  1079         iPauseState = EPauseStateReleased;

  1080         }

  1081     else

  1082         {

  1083         iPauseState = EPauseStateNone;

  1084         }

  1085         

  1086     PRINT( _L( "Camera <= CCamZoomModel::StopZoom " ) );

  1087     }

  1088 

  1089 // -----------------------------------------------------------------------------

  1090 // CCamZoomModel::HandleControllerEventL

  1091 // Called when a controller event occurs

  1092 // -----------------------------------------------------------------------------

  1093 //

  1094 void CCamZoomModel::HandleControllerEventL( TCamControllerEvent aEvent, 

  1095                                             TInt /*aError*/ )

  1096   {

  1097   PRINT( _L( "Camera => CCamZoomModel::HandleControllerEventL " ) );

  1098   switch( aEvent )

  1099     {

  1100     // -----------------------------------------

  1101     case ECamEventEngineStateChanged:

  1102       {

  1103       iCameraState = iController.CameraControllerState();  

  1104       

  1105       // If a reset is waiting. This happens if the application 'pretends to exit' 

  1106       // but this occurred when the engine was not prepared e.g. in standby.

  1107       // The zoom needs to be set back to default when prepared, and the engine has

  1108       // now entered a prepared state

  1109       if ( iResetPending 

  1110         && ( iCameraState & (ECamImageOn|ECamVideoOn) ) )

  1111           {

  1112           // The zoom pane will not be redrawn while the iResetPending flag is on.

  1113           // This calls RefreshSettings()

  1114           ResetZoomTo1x();

  1115           // In this situation the zoom pane should not be shown.

  1116           /*if ( iPane->IsVisible() )

  1117               {

  1118               iPane->MakeVisible( EFalse, ETrue );

  1119               }*/

  1120           iResetPending = EFalse;                

  1121           }     

  1122       else

  1123           {

  1124           // If state changes (video <-> photo) refresh settings

  1125           RefreshSettings();

  1126           }

  1127       }

  1128       break;

  1129     // -----------------------------------------

  1130     case ECamEventCameraChanged:

  1131       {        

  1132       // If state changes (camera change) refresh settings

  1133       RefreshSettings();

  1134       

  1135       ResetZoomTo1x();