examples/sfexamples/GfxWorkbench/src/GfxIclView.cpp

/*
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modification, are permitted provided that the following conditions are met:

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  list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
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  may be used to endorse or promote products derived from this software
  without specific prior written permission.

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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Description:  Application view implementation
*/


// INCLUDE FILES
#include <GDI.H>
#include <coemain.h>
#include <EIKENV.H>
#include "GfxIclView.h"
#include <ImageConversion.h>



class CGfxImageDecoder : public CActive
        {
public:
        CGfxImageDecoder(CFbsBitmap* aBitmap, CFbsBitmap* aMask, MGfxImageDecoderHandler& aHandler);
        ~CGfxImageDecoder();

        void LoadImageL(const TDesC& aFilename);
        void RunL()     ;
        void DoCancel();

private:        
        CImageDecoder* iDecoder; 
        CFbsBitmap*             iBitmap;
        MGfxImageDecoderHandler& iHandler;
        RFs iFs;
        };
        
// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------
// CGfxDirectScreenBitmapView::NewL()
// Two-phased constructor.
// -----------------------------------------------------------------------------
//
CGfxIclView* CGfxIclView::NewL( const TRect& aRect )
        {
        CGfxIclView* self = CGfxIclView::NewLC( aRect );
        CleanupStack::Pop( self );
        return self;
        }

// -----------------------------------------------------------------------------
// CGfxDirectScreenBitmapView::NewLC()
// Two-phased constructor.
// -----------------------------------------------------------------------------
//
CGfxIclView* CGfxIclView::NewLC( const TRect& aRect )
        {
        CGfxIclView* self = new ( ELeave ) CGfxIclView;
        CleanupStack::PushL( self );
        self->ConstructL( aRect );
        return self;
        }

// -----------------------------------------------------------------------------
// CGfxDirectScreenBitmapView::ConstructL()
// Symbian 2nd phase constructor can leave.
// -----------------------------------------------------------------------------
//
void CGfxIclView::ConstructL( const TRect& aRect )
        {
        // Create a window for this application view
        CreateWindowL();

        // Set the windows size
        SetRect( aRect );


        // Activate the window, which makes it ready to be drawn
        ActivateL();
        }

// -----------------------------------------------------------------------------
// CGfxDirectScreenBitmapView::CGfxDirectScreenBitmapView()
// C++ default constructor can NOT contain any code, that might leave.
// -----------------------------------------------------------------------------
//
CGfxIclView::CGfxIclView()
        {
        // No implementation required
        }


// -----------------------------------------------------------------------------
// CGfxDirectScreenBitmapView::~CGfxDirectScreenBitmapView()
// Destructor.
// -----------------------------------------------------------------------------
//
CGfxIclView::~CGfxIclView()
        {
        delete iImageDecoder;
        delete iLoadingBmp;
        delete iBitmap;
        }


// -----------------------------------------------------------------------------
// CGfxDirectScreenBitmapView::Draw()
// Draws the display.
// -----------------------------------------------------------------------------
//
void CGfxIclView::Draw( const TRect& /*aRect*/ ) const
        {
        // Get the standard graphics context
        CWindowGc& gc = SystemGc();

        // Gets the control's extent
        TRect drawRect( Rect());

        // Clears the screen
        gc.Clear( drawRect );

        // If the bitmap has fully loaded, then draw it
        if(iBitmap)
                {
                gc.BitBlt(TPoint(0,0), iBitmap);
                }
        
        }

// -----------------------------------------------------------------------------
// CGfxDirectScreenBitmapView::SizeChanged()
// Called by framework when the view size is changed.
// -----------------------------------------------------------------------------
//
void CGfxIclView::SizeChanged()
        {  
        DrawNow();
        }
// End of File




CGfxImageDecoder::CGfxImageDecoder(CFbsBitmap* aBitmap, CFbsBitmap* /*aMask*/, MGfxImageDecoderHandler& aHandler):
        CActive(0),
        iBitmap(aBitmap),
        iHandler(aHandler)
        {
        CActiveScheduler::Add(this);
        }

CGfxImageDecoder::~CGfxImageDecoder()
        {
        Cancel();
        iFs.Close();
        delete iDecoder;
        }


void CGfxImageDecoder::RunL()
        {
        iHandler.GfxImageLoadedCallBack(iStatus.Int());
        }       

void CGfxImageDecoder::DoCancel()
        {
        iDecoder->Cancel();
        }       

void CGfxImageDecoder::LoadImageL(const TDesC& aFilename)
        {

        User::LeaveIfError(iFs.Connect());
        
        iDecoder = CImageDecoder::FileNewL(iFs, aFilename);
        TFrameInfo info = iDecoder->FrameInfo();
        
        User::LeaveIfError( iBitmap->Create(info.iOverallSizeInPixels, info.iFrameDisplayMode) );

        iDecoder->Convert(&iStatus, *iBitmap);
        SetActive();
        }
        

void CGfxIclView::GfxImageLoadedCallBack(TInt /*aError*/)
        {
        iBitmap = iLoadingBmp;
        iLoadingBmp = NULL;
        
        DrawNow();
        }

void CGfxIclView::StartL()
        {
        iLoadingBmp = new(ELeave) CFbsBitmap();
        iImageDecoder = new(ELeave) CGfxImageDecoder(iLoadingBmp, NULL, *this);
        iImageDecoder->LoadImageL(_L("c:\\data\\images\\robot.bmp"));
        }
        
void CGfxIclView::StopL()
        {
        }

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