Controls do not draw ,NeedHelp

[sudeepa2005]

I am having some controls contained in a container instances of the following class.

#include "hdrandfooter/CBand.h"
#include <coemain.h>
#include <EMail.mbg>

CBand::CBand(TInt aBandType,MStateObserver& aStateObserver,MImageLoader& aImageLoader)
:iStateObserver(aStateObserver),iImageLoader(aImageLoader)
	{
		iBandType=aBandType;
	}

CBand::~CBand()
	{
	
	}
void CBand::ConstructL()
	{
	CreateWindowL();
	TRect iRect=TRect();
	switch(iBandType)
	{
		case KBandHeader:
		iRect.iTl.iX=0;
		iRect.iTl.iY=0;
		iRect.iBr.iX=iImageLoader.GetClientScreen().iBr.iX;
		iRect.iBr.iY=CCoeEnv::Static()->NormalFont()->HeightInPixels();
		break;
		case KBandFooter:
		iRect.iTl.iX=0;
		iRect.iTl.iY=iImageLoader.GetFullScreen().iBr.iY-CCoeEnv::Static()->NormalFont()->HeightInPixels();
		iRect.iBr.iX=iImageLoader.GetClientScreen().iBr.iX;
		iRect.iBr.iY=iImageLoader.GetFullScreen().iBr.iY;
		break;
	}
	SetRect(iRect);
	ActivateL();
	}
void CBand::Draw(const TRect aRect)const
	{
		CWindowGc& gc=SystemGc();
		gc.DrawBitmap(aRect,iImageLoader.GetImage(EMbmEmailTopper));
	
	}

and the are called into the container as

void CEMailContainer::ConstructL()
	{
	iHeader=new (ELeave) CBand(CBand::KBandHeader,iStateObserver,iImageLoader);
	iHeader->SetMopParent(this);
	iHeader->ConstructL();
	iFooter=new (ELeave) CBand(CBand::KBandFooter,iStateObserver,iImageLoader);
	iFooter->SetMopParent(this);
	iFooter->ConstructL();
	iOption=new (ELeave) COptionScreen(iStateObserver,iImageLoader);
	iOption->SetMopParent(this);
	iOption->ConstructL();

	iHeader->DrawNow();
	iFooter->DrawNow();
	iOption->DrawNow();

	ActivateL();
	}
TInt CEMailContainer::CountComponentControls() const
	{
	return 3; // return nbr of controls inside this container
	}

// ---------------------------------------------------------
// CEMailContainer::ComponentControl(TInt aIndex) const
// ---------------------------------------------------------
//
CCoeControl* CEMailContainer::ComponentControl(TInt aIndex) const
	{
	switch ( aIndex )
		{
		case 0:
			return iHeader;
		case 1:
			return iFooter;
		case 2:
		    return iOption;
		default:
			return NULL;
		}
	}

But my code does not enter the draw function of the iHeader ,iFooter and iOption .

[deepchand86]

Have you checked with the debugger, whether the controls are created r not..
Is your CBand a CCoeControl..

[sudeepa2005]

Yes the controls are being created and yes of course CBand inherits CCoeControl as public .. Also I have seen that my debug pointer goes into relevant lines in ComponentControls of the container once in top to bottom oder and once bottom up order . Strange ?

[deepchand86]

Have you added ur control to the stack..
Also check if CBand's Draw is called..
Make sure u call ActivateL() first and then Draw().
Anyway have a look at the following link...
http://wiki.forum.nokia.com/index.ph...Custom_control

find if anything is missing..

[sudeepa2005]

Yes , I have added the container to the control stack . The controls are in the container , do I have to add each of them into the stack ? In which order ? Since , if I create and add them in the ConstructL . The top content in the stack would be the container itself , without window .
Secondly , before calling Drawnow for control objects I have called respective Activatel in their constructor . Do I have to call the caontainer ActivateL before calling Drawnow for contained Controls?

void CEMailAppUi::DeleteSplash()
	{
	RemoveFromStack(iSplashScreen);
	AddToStackL( iAppContainer );
	if(iSplashScreen != (CSplashScreen *)NULL)
		{
			delete iSplashScreen;
			iSplashScreen = (CSplashScreen *)NULL;
		}	
	}
void CEMailAppUi::CreateHomeScreen()
	{
	iAppContainer = new (ELeave) CEMailContainer(*this,*this);//::NewL(*this,*this,this);
	iAppContainer->SetMopParent(this);
	iAppContainer->ConstructL(this);
	DeleteSplash();	
	}

[stenlik]

Hi,

I have 2 questions

1/ Is CEMailContainer CCoeControl derived? I gues it is as you implement CountComponentControls() and ComponentControl().

2/ Where is the window specified for the container - you have to call either CreateWindowL() or SetContainerWindowL().

3/ Where do you set the rectange for the container?

BR
STeN

[sudeepa2005]

Yes Stenlik. My Container is a control , Well in one version I made it windowless (as I read somewhere that windows must be declared for the topmost level controls ) . Now in this windowless Container I tried to make the Control windows appear . That was the code but none was drawing . No Container , No Control.
In the second version I tried creating one window for the Container and pass that one to my contained control . The funny thing is that , in the second case , if I implement draw codes into my container that 1 is getting executed and not the Controls draw codes .
My code is

void CEMailContainer::ConstructL(MObjectProvider* /*aParent*/)
	{
	/* if we create a window in the container and pass them
	 * there is a resource lock occuring , ie iHeader is locking window
	 * so that one cannot be used by others to draw */
	CreateWindowL(); 	
	SetRect(iImageLoader.GetFullScreen());
	iHeader=new (ELeave) CBand(CBand::KBandHeader,iStateObserver,iImageLoader);
	CleanupStack::PushL(iHeader);
//	iHeader->SetMopParent(this);//Header contains window
	iHeader->SetContainerWindowL(*this);
	iHeader->ConstructL();
	CleanupStack::Pop(iHeader);
	CEikonEnv::Static()->EikAppUi()->AddToStackL(iHeader);	
	iFooter=new (ELeave) CBand(CBand::KBandFooter,iStateObserver,iImageLoader);
	CleanupStack::PushL(iFooter);
//	iFooter->SetMopParent(this);
	iFooter->SetContainerWindowL(*this);
	iFooter->ConstructL();
	CleanupStack::Pop(iFooter);
	iOption=new (ELeave) COptionScreen(iStateObserver,iImageLoader);
	CleanupStack::PushL(iOption);
//	iOption->SetMopParent(this);
	iOption->SetContainerWindowL(*this);
	iOption->ConstructL();
	CleanupStack::Pop(iOption);
//	iFooter=CBand::NewL(CBand::KBandFooter,iStateObserver,iImageLoader,this);	
	iHeader->DrawNow();
	iFooter->DrawNow();
	iOption->DrawNow();	
	ActivateL();
	}

void CEMailContainer::Draw(const TRect& aRect) const
	{
	CWindowGc& gc = SystemGc();
	// TODO: Add your drawing code here
	// example code...
	gc.SetPenStyle( CGraphicsContext::ENullPen );
	gc.SetBrushColor( KRgbGray );
	gc.SetBrushStyle( CGraphicsContext::ESolidBrush );
	gc.DrawRect( aRect );
	}

If I combine a windowed Container with windowed Control and execute draw codes in both , I can see Container window being drawn with a big rectangular hole in it , where the control should lie . . what should I do ?

[sudeepa2005]

Solved ,but is it always only one control and its respective container would be locking server for draw code ? Can we not impose draw for multiple samelevel controls ?

[stenlik]

Hi,

in the compound control (container) can be included many controls - there are no limits for that. Check following link about how to implement properly the custom control:

http://wiki.forum.nokia.com/index.ph...Custom_control

BR
STeN