How to display an image

[krsunil]

Hi

I am trying to display an image and a label in one of my container. Though my program doesnt crashes I dont see any image on the phone screen.

I have inherited my class from CCoeControl and gettting image from the resource file.

Any help is appreciated.

Here is the resource file:

RESOURCE IMAGE welcome_image
{
horiz_align=EEikLabelAlignHCenter;
vert_align=EEikLabelAlignVTop;
bmpfile="c:\\calypsosplash.mbm";
bmpid=0;
}

Here is the .cpp file

void CDirectionsWelcomeContainer::ConstructL(const TRect& aRect)
{

CreateWindowL();
iLabel = new (ELeave) CEikLabel;
iLabel->SetContainerWindowL( *this );
iLabel->SetTextL( _L("Mapping") );
iLabel->SetExtent(EDWIN_LABEL_POS, iLabel->MinimumSize());

iImage=new (ELeave)CEikImage;
iImage->SetContainerWindowL(*this);
TResourceReader reader;
iCoeEnv->CreateResourceReaderLC(reader, WELCOME_IMAGE);
iImage->ConstructFromResourceL(reader);
CleanupStack::PopAndDestroy(); // Resource reader
SetRect(aRect);
ActivateL();
}

[symbianyucca]

Hi

Have you implemented your CountComponentControls() & ComponentControl()-functions correctly, so they would return both of your controls.

And are you sure your image for CEikImage, is in right path and can be found correctly ?

You could also try first loading your images & checking that they are loaded correctly and then use SetBitmap() & SetMask()-functions to set them to your CEikImage, then at least you would know that everything is working correctly.

yucca

[krsunil]

Thanks for replying

I do have CountComponentControls() & ComponentControl() functions implemented correctly. The code is pasted below for the container.

Also I have kepy the imamge c:\symbian\6.1\series60\Epoc32\Wins\C directory. I copied calypsosplash.mbm from one of the examples.

Can you tell me how can I first load the image and then use setBitmap & then use setmask to my CEikImage.

Sorry if I am being naive.

Regards

Sunil.


Here is the code:

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

// ---------------------------------------------------------
// CDirectionsContainer::ConstructL(const TRect& aRect)
// EPOC two phased constructor
// ---------------------------------------------------------
//

void CDirectionsWelcomeContainer::ConstructL(const TRect& aRect)
{

CreateWindowL();
iLabel = new (ELeave) CEikLabel;
iLabel->SetContainerWindowL( *this );
iLabel->SetTextL( _L("Mapping") );
iLabel->SetExtent(EDWIN_LABEL_POS, iLabel->MinimumSize());

iImage=new (ELeave)CEikImage;
iImage->SetContainerWindowL(*this);
TResourceReader reader;
iCoeEnv->CreateResourceReaderLC(reader, WELCOME_IMAGE);
iImage->ConstructFromResourceL(reader);
CleanupStack::PopAndDestroy(); // Resource reader

//iImage->SetExtent(EDWIN_POS2, iImage->MinimumSize());

iLabel1 = new (ELeave) CEikLabel;
iLabel1->SetContainerWindowL( *this );
iLabel1->SetTextL( _L("Test") );
iLabel1->SetExtent(EDWIN_LABEL_POS2, iLabel1->MinimumSize());

SetRect(aRect);
ActivateL();
}

// Destructor
CDirectionsWelcomeContainer::~CDirectionsWelcomeContainer()
{
delete iLabel;
delete iLabel1;
delete iImage;
}

// ---------------------------------------------------------
// CDirectionsContainer::SizeChanged()
// Called by framework when the view size is changed
// ---------------------------------------------------------
//
void CDirectionsWelcomeContainer::SizeChanged()
{
// TODO: Add here control resize code etc.
//iLabel->SetExtent( TPoint(10,10), iLabel->MinimumSize() );
//iToDoLabel->SetExtent( TPoint(10,100), iToDoLabel->MinimumSize() );
}

// ---------------------------------------------------------
// CDirectionsContainer::CountComponentControls() const
// ---------------------------------------------------------
//
TInt CDirectionsWelcomeContainer::CountComponentControls() const
{
return 3; // return nbr of controls inside this container
}

// ---------------------------------------------------------
// CDirectionsContainer::ComponentControl(TInt aIndex) const
// ---------------------------------------------------------
//
CCoeControl* CDirectionsWelcomeContainer::ComponentControl(TInt aIndex) const
{
switch ( aIndex )
{
case 0:
return iLabel;
case 1:
return iImage;
case 2:
return iLabel1;
default:
return NULL;
}
}

// ---------------------------------------------------------
// CDirectionsContainer::Draw(const TRect& aRect) const
// ---------------------------------------------------------
//
void CDirectionsWelcomeContainer::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);
}

// ---------------------------------------------------------
// CDirectionsContainer::HandleControlEventL(
// CCoeControl* aControl,TCoeEvent aEventType)
// ---------------------------------------------------------
//
void CDirectionsWelcomeContainer::HandleControlEventL(
CCoeControl* /*aControl*/,TCoeEvent /*aEventType*/)
{
// TODO: Add your control event handler code here
}

[symbianyucca]

Hi

Your code looks good to me, dunno really why you are not getting anything to the screen. Anyway to load the images just use CFbsBitmap-object, it's well documented & easy to use and after succesfull loading just set it by using the functions provided by CEikImage (well documented as well).

yucca

[krsunil]

Yucca

do I need to put anything in .mpp file in order to make my image to work?

regards

Sunil

[krsunil]

Yucca

I just checked that I am able to load the bitmap using CFbsBitmap function. bitmap->Load(imagen,0) returns zero which means success. The data.mbm file contain one bit map file only.

However I am still not able to load the image using SetBitmap and SetMask functions. Do I need to overwrite the Draw function of the container?

regards

Sunil

the new code is pasted below:

CreateWindowL();
iLabel = new (ELeave) CEikLabel;
iLabel->SetContainerWindowL( *this );
iLabel->SetTextL( _L("Mapping") );
iLabel->SetExtent(EDWIN_LABEL_POS, iLabel->MinimumSize());

_LIT (imagen,"c:\\system\\apps\\data.mbm");

// load the bitmap from an .mbm file
bitmap = new (ELeave) CFbsBitmap();
CleanupStack::PushL(bitmap);
TInt ret = bitmap->Load(imagen,0);
CleanupStack::PopAndDestroy();

iImage=new (ELeave)CEikImage;
iImage->SetContainerWindowL(*this);
iImage->SetBitmap(bitmap);
iImage->SetMask(0);
/*
TResourceReader reader;
iCoeEnv->CreateResourceReaderLC(reader, WELCOME_IMAGE);
iImage->ConstructFromResourceL(reader);
CleanupStack::PopAndDestroy(); // Resource reader
*/

iLabel1 = new (ELeave) CEikLabel;
iLabel1->SetContainerWindowL( *this );
iLabel1->SetTextL( _L("by V-Enable") );
iLabel1->SetExtent(EDWIN_LABEL_POS2, iLabel1->MinimumSize());

SetRect(aRect);
ActivateL();
}

[symbianyucca]

Hi Sunil

I'm still puzzled why it doesn't work, your code looks good enough. Anyway in case you want, you could send project to me (jusilven@hotmail.com) and I'll look into it, propably can get it fixed a lot faster that way.

yucca

[rashmi_ghai]

reading the messages in this post , i was wondering how to capture the displayed image's data and apply some standard perform image processing algorithms on it

[harfaiz]

can u tell me how to access pixels in bitmaps?
using which api's can we read and write bmpfiles?