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Revision as of 07:27, 20 March 2007 by symbianyucca (Talk | contribs)

Drawing skins in container

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The CSkinnedContainer implementation illustrates how to draw skins in CCoeControl derived container within S60 platform.

The iBgContext is the CAknsBasicBackgroundControlContext which is used to draw the skin into the controls background. To draw different screen area you could change KAknsIIDQsnBgScreen identify the background you would like to use with your container.

Note that for skins to work properly you need to enable skins first, usually this is done in Application user interface classes ConstructL function, by calling the ConstructL function with CAknAppUi::EAknEnableSkin as a parameter.

SkinnedContainer.cpp

CSkinnedContainer::~CSkinnedContainer()
{
delete iBgContext;
iBgContext = NULL;
}
 
CSkinnedContainer* CSkinnedContainer::NewL(void)
{
CSkinnedContainer* self = new(ELeave)CSkinnedContainer();
CleanupStack::PushL(self);
self->ConstructL();
CleanupStack::Pop(self);
return self;
}
 
void CSkinnedContainer::ConstructL(void)
{
CreateWindowL();
 
// make first with no size at all
iBgContext = CAknsBasicBackgroundControlContext::NewL(KAknsIIDQsnBgScreen,TRect(0,0,1,1), ETrue);
// Setting rect will cause SizeChanged to be called
// and iBgContext size & position is updated accordingly.
SetRect(CEikonEnv::Static()->EikAppUi()->ClientRect());
 
ActivateL();
DrawNow();
}
 
void CSkinnedContainer::SizeChanged()
{
if ( iBgContext )
{
iBgContext->SetRect(Rect());
 
if ( &Window() )
{
iBgContext->SetParentPos( PositionRelativeToScreen() );
}
}
}
 
 
void CSkinnedContainer::HandleResourceChange(TInt aType)
{
TRect rect;
 
if ( aType==KEikDynamicLayoutVariantSwitch )
{
AknLayoutUtils::LayoutMetricsRect(AknLayoutUtils::EMainPane, rect);
SetRect(rect);
}
 
CCoeControl::HandleResourceChange(aType);
}
 
 
TTypeUid::Ptr CSkinnedContainer::MopSupplyObject(TTypeUid aId)
{
if (iBgContext)
{
return MAknsControlContext::SupplyMopObject(aId, iBgContext );
}
 
return CCoeControl::MopSupplyObject(aId);
}
 
 
void CSkinnedContainer::Draw(const TRect& aRect) const
{
CWindowGc& gc = SystemGc();
 
// draw background skin first.
MAknsSkinInstance* skin = AknsUtils::SkinInstance();
AknsDrawUtils::Background( skin, iBgContext, this, gc, aRect );
}

SkinnedContainer.h

#include <coecntrl.h>       // CCoeControl
#include <AknsBasicBackgroundControlContext.h>
#include <aknsdrawutils.h>
#include <aknscontrolcontext.h>
#include <AknsSkinInstance.h>
#include <aknsutils.h>
 
 
class CSkinnedContainer : public CCoeControl
{
public:
static CSkinnedContainer* NewL(void);
~CSkinnedContainer();
protected:
TTypeUid::Ptr MopSupplyObject(TTypeUid aId); //
private:
virtual void SizeChanged();
virtual void HandleResourceChange(TInt aType);
void ConstructL(void);
void Draw(const TRect& aRect) const;
private:
CAknsBasicBackgroundControlContext* iBgContext;
};
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