Problem in View Architecture .please help

[Abhishek_karmakar]

hello everyone,

i was trying to understand the switching of the views. I created 2 views derived from CAknView and two controls from CcoeControl .compiles properly but does not executes.

when i debug them it debugs well before ActivateL() of CMyViewSwitchingContainer::ConstructL(const TRect& aRect). but terminates after that.

can anyone please help.

following is the list of the followng parts of the program.

MyViewSwitchingAppUi.cpp

/*
 ============================================================================
 Name		: MyViewSwitchingAppUi.cpp
 Author	  : Abhishek karmakar
 Copyright   : copyright @ a.karmakar			
 Description : CMyViewSwitchingAppUi implementation
 ============================================================================
 */

// INCLUDE FILES
#include <viewcli.h>
#include <aknviewappui.h>
#include <avkon.hrh>
#include <aknmessagequerydialog.h>
#include <aknnotewrappers.h>
#include <stringloader.h>
#include <f32file.h>
#include <s32file.h>
#include <hlplch.h>

#include <MyViewSwitching_0xEB4DB8EB.rsg>

#include "MyViewSwitching_0xEB4DB8EB.hlp.hrh"
#include "MyViewSwitching.hrh"
#include "MyViewSwitching.pan"
#include "MyViewSwitchingApplication.h"
#include "MyViewSwitchingAppUi.h"
#include "MyViewSwitchingAppView.h"

_LIT(KFileName, "C:\\private\\EB4DB8EB\\MyViewSwitching.txt");
_LIT(KText, "Messege text from A.karmakar");

// ============================ MEMBER FUNCTIONS ===============================
	void CMyViewSwitchingAppUi::ConstructL()
		{
		BaseConstructL(CAknAppUi::EAknEnableSkin);

			CEikStatusPane* sp = StatusPane();
			iNaviPane = (CAknNavigationControlContainer*) sp->ControlL(TUid::Uid(EEikStatusPaneUidNavi));
			iDecoratedTabGroup = iNaviPane->ResourceDecorator();
			if (iDecoratedTabGroup)
				{
				iTabGroup = (CAknTabGroup*) iDecoratedTabGroup->DecoratedControl();
				}
			// Initialise app UI with standard value.


			CMyViewSwitchingAppView* view1 = new(ELeave) CMyViewSwitchingAppView;
			CleanupStack::PushL(view1);
			view1->ConstructL(iTabGroup);
			AddViewL(view1);
			CleanupStack::Pop(view1);

			iViewId1 = view1->Id();
			CMyViewSwitchingView2* view2 = new(ELeave) CMyViewSwitchingView2;
			CleanupStack::PushL(view2);
			view2->ConstructL();
			AddViewL(view2);
			CleanupStack::Pop(view2);
			iViewId2 = view2->Id();

			SetDefaultViewL( *view1);
		
		}
	CMyViewSwitchingAppUi::~CMyViewSwitchingAppUi()
		{
		delete iDecoratedTabGroup;
		}
	void CMyViewSwitchingAppUi::DynInitMenuPaneL(TInt /*aResourceId*/,CEikMenuPane* /*aMenuPane*/)
		{
		
		}
	void CMyViewSwitchingAppUi::HandleCommandL(TInt aCommand)
		{
		switch (aCommand)
				{
				case EEikCmdExit:
					{
					Exit();
					break;
					}
					// You can add your all application applying commands here.
					// You would handle here menu commands that are valid for all views.
				}
		
		}
	 TKeyResponse CMyViewSwitchingAppUi::HandleKeyEventL(const TKeyEvent& aKeyEvent,TEventCode /*aType*/)
		{
		if ( iTabGroup == NULL )
		        {
		        return EKeyWasNotConsumed;
		        }

		    TInt active = iTabGroup->ActiveTabIndex();
		    TInt count = iTabGroup->TabCount();

		    switch ( aKeyEvent.iCode )
		        {
		        case EKeyLeftArrow:
		            if ( active > 0 )
		                {
		                active--;
		                iTabGroup->SetActiveTabByIndex( active );
		                // ActivateLocalViewL() is used to change the view.
		                // To change view from another application we would use ActivateViewL()
		                // Send an empty message
		                ActivateLocalViewL(TUid::Uid(iTabGroup->TabIdFromIndex(active)));
		                }
		            break;
		        case EKeyRightArrow:
		        
		            if( (active + 1) < count )
		                {
		                active++;
		                iTabGroup->SetActiveTabByIndex( active );
		                // ActivateLocalViewL() is used to change the view.
		                // To change view from another application we would use ActivateViewL()
		                ActivateLocalViewL(TUid::Uid(iTabGroup->TabIdFromIndex(active)));
		                }
		            break;
		        default:
		            return EKeyWasNotConsumed;
		        }

		    return EKeyWasConsumed;
		
		}
	void CMyViewSwitchingAppUi::HandleForegroundEventL(TBool aForeground)
		{
		if (aForeground==TRUE)
		    iEikonEnv->InfoMsg(_L("Foreground true"));
		    else
		    iEikonEnv->InfoMsg(_L("Foreground false"));
		
		}
	 void CMyViewSwitchingAppUi::HandleResourceChangeL(TInt aType)
		{
		CAknAppUi::HandleResourceChangeL( aType );

		    // ADDED FOR SCALABLE UI SUPPORT
		    // *****************************
		    if ( aType==KEikDynamicLayoutVariantSwitch )
		        {
				((CMyViewSwitchingAppView*) View( iViewId1) )->HandleClientRectChange(  );
				((CMyViewSwitchingView2*) View( iViewId2) )->HandleClientRectChange(  );
				}
		    
		}

the debugger takes me to these classes ..

/*
 ============================================================================
 Name		: MyViewSwitchingAppView.cpp
 Author	  : Abhishek karmakar
 Copyright   : copyright @ a.karmakar			
 Description : Application view implementation
 ============================================================================
 */

#include "MyViewSwitchingView2.h"
#include  "MyViewSwitchingContainer.h" 
#include  "MyViewSwitching.hrh"
// INCLUDE FILES
#include  <aknviewappui.h>
#include  <avkon.hrh>
#include <coemain.h>
#include <aknview.h>
#include "MyViewSwitchingAppView.h"
#include <MyViewSwitching_0xEB4DB8EB.rsg>



// ============================ MEMBER FUNCTIONS ===============================
void CMyViewSwitchingAppView::ConstructL(CAknTabGroup* aTabGroup)
	{
	BaseConstructL(R_MYVIEW_VIEW1);
	//BaseConstructL(R_MYVIEW_VIEW1);
	iTabGroup = aTabGroup;

	}

CMyViewSwitchingAppView::~CMyViewSwitchingAppView()
	{
	if (iContainer)
		{
		AppUi()->RemoveFromViewStack( *this, iContainer);
		}
	delete iContainer;
	}

TUid CMyViewSwitchingAppView::Id() const
	{
	return KViewId;
	}

void CMyViewSwitchingAppView::HandleCommandL(TInt aCommand)
	{
	switch (aCommand)
		{
		case EAknSoftkeyOk:
			{
			iEikonEnv->InfoMsg(_L("view 1 ok"));
			}
			break;
		case EAknSoftkeyExit:
			{
			AppUi()->HandleCommandL(EEikCmdExit);
			}
			break;
		case EMyViewCmdView1Cmd1:
			{
			
			}
			break;
		case EMyViewCmdView1Cmd2:
			{
			
			}
			break;
		case EMyViewCmdView1Cmd3:
			{
			
			}
			break;
		default:
			{
			
			}
			break;
		}
	}
void CMyViewSwitchingAppView::HandleClientRectChange()
	{
	if (iContainer)
		{
		iContainer->SetRect(ClientRect());
		}
	}
void CMyViewSwitchingAppView::DoActivateL(const TVwsViewId& /*aPrevViewId*/,TUid /*aCustomMessageId*/, const TDesC8& /*aCustomMessage*/)
	{
	if (!iContainer)
		{
		iContainer = new (ELeave) CMyViewSwitchingContainer;
		iContainer->SetMopParent(this);
		iContainer->ConstructL(ClientRect());
		AppUi()->AddToStackL(*this, iContainer);
		}

	}

void CMyViewSwitchingAppView::DoDeactivate()
	{
	if (iContainer)
		{
		AppUi()->RemoveFromViewStack(*this, iContainer);
		}
	delete iContainer;
	iContainer = NULL;
	}

AND THE CONTAINER

/*
 ============================================================================
 Name		: MyViewSwitchingContainer.cpp
 Author	  : Abhishek karmakar
 Version	 : 1.0
 Copyright   : copyright @ a.karmakar			
 Description : CMyViewSwitchingContainer implementation
 ============================================================================
 */

#include "MyViewSwitchingContainer.h"

#include <eiklabel.h>

void CMyViewSwitchingContainer::ConstructL(const TRect& aRect)
	{
	CreateWindowL();
	
	iLabel = new (ELeave) CEikLabel;
	iLabel->SetContainerWindowL(*this);
	iLabel->SetTextL(_L("This is my View 1"));

	SetRect(aRect);

	ActivateL();

	}

CMyViewSwitchingContainer::~CMyViewSwitchingContainer()
	{
	delete iLabel;
	}

//function from the base classes	

void CMyViewSwitchingContainer::SizeChanged()
	{
	iLabel->SetExtent(TPoint(10,10),iLabel->MinimumSize());
	}

TInt CMyViewSwitchingContainer::CountComponentControls() const
	{
	return 1;

	}

CCoeControl* CMyViewSwitchingContainer::ComponentControls(int aIndex) const
	{
	switch(aIndex)
		{
		case 0:
			return iLabel;
		case 1:
			return NULL;
		}
	return NULL;
	}

void CMyViewSwitchingContainer::Draw(const TRect& aRect) const
	{
	CWindowGc& gc = SystemGc();
	gc.SetPenStyle(CGraphicsContext::ENullPen);
	gc.SetBrushColor(KRgbBlue);
	gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
	gc.DrawRect(aRect);
	
	}

void CMyViewSwitchingContainer::HandleControlEventL(CCoeControl* /*aControl*/,TCoeEvent /*aEventType*/)
	{
	

	}

please help..

[sriky27]

Hi,

Try in your constructl i.e

void CMyViewSwitchingContainer::ConstructL(const TRect& aRect)
{
CreateWindowL();

iLabel = new (ELeave) CEikLabel;
iLabel->SetContainerWindowL(*this);
iLabel->SetTextL(_L("This is my View 1"));
iLabel->SetExtent(TPoint(10,10),iLabel->MinimumSize());


SetRect(aRect);

ActivateL();

}

[Abhishek_karmakar]

hey sriky27,

Thanks for the reply but it is not working for me . It simple exits as soon as i execute the application. there is a example shipped with S60 library "MyView" it is doing the same but in my application it is not working.

any more ideas

thanks

[yogpan]

Hi,
Have you tried debugging your application.your implementation looks fine.Are you getting any panic code when your application is crashing??

[Abhishek_karmakar]

hello YogPan,
thanks to you too. I tried debugging it , after a bit of research i also commented the portions where it was activating the control,Then, i commented the second view construction in my AppUi, now its showing two tabs in the screen the first one being empty and transparent and when i switch the second view it shows me the second view with the container.
what i am not able to understand is that even when i have commented my second view why is it showing me the display ..

neways .i'll take it from here . thanks for the replies .. may Nokia bless u all with better SDK's and IDE's.

(ha ha ha) kidding

Abhishek karmakar