[Legendus]

Hi!

I'm trying to use the camerawrapper to do a app that works like a camera. I'm starting, and I'm using the example code of the package Camera wrapper example. When I use it... I get the next compilation error:


1256946905812 illegal implicit conversion from 'CviewfinderactivoView *' 'MCameraEngineObserver *' ViewfinderactivoView.cpp

I have created a project, and i want to show the viewfinder (for the moment) in the viewfinderactivo. For that, in the construct method I call to the initViewFinder() function.

Here it is:

int CviewfinderactivoView::initViewFinder(){

TInt camErr(KErrNotSupported);
//Si no hemos definido la cámara anteriormente
 if(iCameraWrapper==NULL){
 //Si hay cámaras disponibles
	 if(CCameraEngine::CamerasAvailable() > 0)
     {
     //Intentamos activar la cámara.
		 TRAP(camErr, iCameraWrapper = CCameraEngine::NewL(0,0,this));
     }
	 //Preguntar por camErr...
	 
	 //Establecemos tamaño de captura y de ViewFinder (Por ahora, modo portrait)
	 iViewFinderSize = TSize(Rect().Size().iWidth,Rect().Size().iWidth);
	 iCaptureSize = TSize(1280,960);
	 
	 if (iCameraWrapper->State() == CCameraEngine::EEngineIdle)
	 {
	        // Prepare camera
	   TRAPD(err,iCameraWrapper->PrepareL(iCaptureSize));
	   if (err){
	            //SetError(_L("Camera prepare error %d"), err);
	            return;
	   }
	        
	   // Start viewfinder. Viewfinder pictures starts coming into MceoViewFinderFrameReady();
	   TRAPD(err2,iCameraWrapper->StartViewFinderL(iViewFinderSize));
	   if (err2)
	            {
	   //         SetError(_L("Camera start viewfinder error %d"), err2);
	            return;
	            }

	        //SetTitle(_L("Camera viewfinder"));
	  }
  }
}

Then, I have in the private zone of the .h this:

	CCameraEngine* iCameraWrapper;
	TSize iViewFinderSize;
	TSize iCaptureSize;

The includes in the .h put by me are:

#include <cameraengine.h>
#include <cameraengineobserver.h>

I have added the libs:

camerawrapper.lib
ecam.lib

To the .mmp file.

Thank!

[wizard_hu_]

Originally Posted by Legendus

1256946905812 illegal implicit conversion from 'CviewfinderactivoView *' 'MCameraEngineObserver *' ViewfinderactivoView.cpp

Make sure that your class CviewfinderactivoView inherits from (and implements) MCameraEngineObserver.

[Legendus]

Ok, thanks!
Now I have added it and I have:

class CviewfinderactivoView :
public CAknView, public MCameraEngineObserver, public CCoeControl (This one for the TRect)

I have added too to the private part:

void MceoCameraReady();

But I have errors too, it must be derived by the inherits..I think

here:

CviewfinderactivoView* CviewfinderactivoView::NewLC()
	{
1	CviewfinderactivoView* self = new ( ELeave ) CviewfinderactivoView();
2	CleanupStack::PushL( self );

Creation Time Description Resource Path Location Type

1 illegal use of abstract class ('MCameraEngineObserver::MceoFocusComplete()')
2 ambiguous access from 'CviewfinderactivoView' to 'CBase'

Comparing with the example, I have it equal.

Another error here:

void CviewfinderactivoView::DoActivateL( 
		const TVwsViewId& /*aPrevViewId*/,
		TUid /*aCustomMessageId*/,
		const TDesC8& /*aCustomMessage*/ )
	{
	// [[[ begin generated region: do not modify [Generated Contents]
	SetupStatusPaneL();
	
				
				
	
	if ( iViewfinderactivo == NULL )
		{
		iViewfinderactivo = CreateContainerL();
->		iViewfinderactivo->SetMopParent( this );
		AppUi()->AddToStackL( *this, iViewfinderactivo );
		} 
	// ]]] end generated region [Generated Contents]
	
	}

ambiguous access from 'CviewfinderactivoView' to 'MObjectProvider'


And here

void CviewfinderactivoView::SetupStatusPaneL()
	{
	// reset the context pane
	TUid contextPaneUid = TUid::Uid( EEikStatusPaneUidContext );
	CEikStatusPaneBase::TPaneCapabilities subPaneContext = 
		StatusPane()->PaneCapabilities( contextPaneUid );
	if ( subPaneContext.IsPresent() && subPaneContext.IsAppOwned() )
		{
		CAknContextPane* context = static_cast< CAknContextPane* > ( 
			StatusPane()->ControlL( contextPaneUid ) );
		context->SetPictureToDefaultL();
		}
	
	// setup the title pane
	TUid titlePaneUid = TUid::Uid( EEikStatusPaneUidTitle );
	CEikStatusPaneBase::TPaneCapabilities subPaneTitle = 
		StatusPane()->PaneCapabilities( titlePaneUid );
	if ( subPaneTitle.IsPresent() && subPaneTitle.IsAppOwned() )
		{
		CAknTitlePane* title = static_cast< CAknTitlePane* >( 
			StatusPane()->ControlL( titlePaneUid ) );
		TResourceReader reader;
->		iEikonEnv->CreateResourceReaderLC( reader, R_VIEWFINDERACTIVO_TITLE_RESOURCE );
		title->SetFromResourceL( reader );
		CleanupStack::PopAndDestroy(); // reader internal state
		}
				
	}

1256948692187 ambiguous access to name found 'CAknView::iCoeEnv' and 'CCoeControl::iCoeEnv'

Thanks!

[wizard_hu_]

Originally Posted by Legendus

class CviewfinderactivoView :
public CAknView, public MCameraEngineObserver, public CCoeControl (This one for the TRect)

He? The view and the container has to be two separate class.

I have added too to the private part:

void MceoCameraReady();

1 illegal use of abstract class ('MCameraEngineObserver::MceoFocusComplete()')

Implementing methods you 'like' is not enough, you have to implement all abstract methods (virtual Something()=0;) from MCameraEngineObserver.

2 ambiguous access from 'CviewfinderactivoView' to 'CBase'

This is because you need two separate classes for CAknView and CCoeControl. http://en.wikipedia.org/wiki/Diamond_inheritance

[Legendus]

Ah, ok, thanks!

That's what I have done:

Copy the contents of the file camerawrapperexample.h and .c to my project files called cameradecodercontain.h and .c

Changing all ccamerawapperexample for the ccameradecodercontain. I have added all the libraries said in the mmp of the example. And finally I get those errors:

1257269181968 illegal use of incomplete struct/union/class 'CCamaradecoderContainerAppUi' (4 times)

In those lines:

iAppUi = static_cast<CCamaradecoderContainerAppUi*>(iEikonEnv->EikAppUi());
iAppUi->UseOptionsExitCbaL();
TRAP_IGNORE(iAppUi->UseOptionsBackCbaL());
iAppUi->UseOptionsExitCbaL();

iAppUi declaration:

private:
// Data

CCamaradecoderContainerAppUi* iAppUi;

Thanks!

[wizard_hu_]

You probably have a "class CCamaradecoderContainerAppUi;" line somewhere in the beginning of cameradecodercontain.h. That is called a forward declaration, enabling to refer CCamaradecoderContainerAppUi as a pointer variable for example.
However it is not enough for 'real' usage in the .cpp file, there you have to #include the real .h file containing the declaration of it. (perhaps #include "CamaradecoderContainerAppUi.h")

[Legendus]

Thanks!

yes, I have already put it in the camaradecodercontainer.cpp. So, it mustn't be... :S

Thank you so much!

[wizard_hu_]

Check your guard macros then, make sure that they are unique for each .h file.

[Legendus]

I have fixed the problem. It was that the class contained on the cameradecoderAppUi was called CCameradecoderAppUi, not CCameradecoderContainerAppUi. So I use the CCameradecoderAppUi in the CCcameradecodercontainer.h and .c

Now I get:

undefined indentifier "UseOptionsExitCbaL"
undefined indentifier "UseOptionBackCbaL"

On

iAppUi->UseOptionsExitCbaL
iAppUi->UseOptionsBackCbaL

Thanks!

[wizard_hu_]

Undefined identifier means that you either do not have such methods at all, or they use some slightly different spelling, arguments, etc. than what you have tried.

[Legendus]

Hello!

Thanks, now it's compile. But now..I have a problem in the executing... :S I have been debugging and I know where it stops, but I don't know why. I'm going to explain you a bit the classes:

CCamera1View -> Class view of the camera wrapper. It's made in a 99% by carbide.
CCamera1 -> Class container. It's the example of the camera wrapper, only changing the names.

At debugging I do a change of view from Initial one to the CCamera1View, where it's done to show the viewfinder.

CCamera1View create a CCamera1:

CCamara1* Ccamara1View::CreateContainerL()
	{
	return CCamara1::NewL( ClientRect());
	}

In CCamera1:

CCamara1* CCamara1::NewL (const TRect& aRect )
    {
    CCamara1* self = CCamara1::NewLC (aRect ); (goes to newLC)
    CleanupStack::Pop (self );
    return self;
    }

CCamara1* CCamara1::NewLC (const TRect& aRect )
    {
    CCamara1* self = new (ELeave) CCamara1;
    CleanupStack::PushL (self );
    self->ConstructL (aRect ); (goes to constructL)
    return self;
    }

void CCamara1::ConstructL (const TRect& aRect )
    {
    // Create a window for this application view
    CreateWindowL ();

    iTitleFont = AknLayoutUtils::FontFromId(EAknLogicalFontPrimarySmallFont);
    
    iAppUi = static_cast<CcamaradecoderAppUi*>(iEikonEnv->EikAppUi());
    
    // Set the windows size
    SetRect (aRect ); (here comes the error!)
    
    // Activate the window, which makes it ready to be drawn
    ActivateL ();
    }

The errors remember me like a infinite loop, because I click on play and it never stops.

The error says:

Thread [Thread id: 1939] (Suspended: Signal 'Exception 0' received. Description: A data abort exception has occurred..)
2 Unknown (0x78D7C378)() 0x78d7c378
1 Unknown (0x78D7C3AA)() 0x78d7c3aa

What is it happening?

Thanks!

[Legendus]

this message is for getting up the post. thanks