examples/Graphics/GraphicsShell/GraphicsShell.cpp

// Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// License: "Symbian Foundation License v1.0" to Symbian Foundation
// members and "Symbian Foundation End User License Agreement v1.0"
// to non-members at the URL
// "http://www.symbianfoundation.org/legal/licencesv10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
//

#include <e32keys.h>

#include <coemain.h>

#include <eikenv.h>
#include <eikdef.h>
#include <eikon.hrh>
#include <eiklabel.h>
#include <eikstart.h>

#include <graphicsshell.rsg>
#include "GraphicsShell.hrh"
#include "GraphicsShell.h"


//
// TExampleShellModel
//

TExampleShellModel::TExampleShellModel()
        {
        iLibrary=KNullDesC;
        }

TBool TExampleShellModel::Differs(const TExampleShellModel* aCompare) const
        {
        return((*(TInt32*)this)!=(*(TInt32*)aCompare));
        }

//
// class CExampleShellContainer
//

void CExampleShellContainer::ConstructL(const TRect& aRect, TExampleShellModel* aModel)
    {
        iModel=aModel;
    CreateWindowL();
    Window().SetShadowDisabled(ETrue);
    iContext=this;
        iBrushStyle=CGraphicsContext::ESolidBrush;
    iBrushColor=KRgbWhite;
    SetRect(aRect);
        CreateLabelL();
    ActivateL();
    }

CExampleShellContainer::~CExampleShellContainer()
    {
        delete iExampleControl;
        delete iLabel;
    }
    
TInt CExampleShellContainer::CountComponentControls() const
        {
        return 1 + (iExampleControl ? 1 : 0);
        }

CCoeControl* CExampleShellContainer::ComponentControl(TInt aIndex) const
        {
        switch (aIndex)
                {
        case 0: return iLabel;
        case 1: return iExampleControl;
        default: return 0;
                };
        }

const TInt KLabelHeight=20;

void CExampleShellContainer::CreateLabelL()
        {
        iLabel=new (ELeave) CEikLabel;
        TRect rect=Rect();
        rect.iTl.iY=rect.iBr.iY-KLabelHeight; // make it bottom 20 pixels
        iLabel->SetContainerWindowL(*this);
        iLabel->SetRect(rect);
        iLabel->SetAlignment(EHCenterVCenter); // center text
        iLabel->SetBufferReserveLengthL(200); // nice long buffer
        iLabel->SetFont(iEikonEnv->AnnotationFont());
        iLabel->ActivateL(); // now ready
        }

void CExampleShellContainer::ResetExampleL(CGraphicExampleControl* aExample)
        {
        // get rid of old control
        delete iExampleControl;
        // set up new one
        iExampleControl=aExample;
        // if non-zero, then carry on
        if (!iExampleControl) return;
        TRect rect=Rect(); // get our rect
        rect.iBr.iY-=KLabelHeight; // make way for label
        rect.Shrink(2,2); // shrink it a bit
        iExampleControl->ConstructL(rect,this,*this); // construct, giving rect, observer, and parent
        }

_LIT(KTxtFinished,"example finished");
void CExampleShellContainer::NotifyGraphicExampleFinished()
        {
        NotifyStatus(KTxtFinished);
        }

void CExampleShellContainer::NotifyStatus(const TDesC& aMessage)
        {
        TRAPD(err,iLabel->SetTextL(aMessage));
        if(err)
                {
                return;
                }
        if (IsActivated()) iLabel->DrawNow();
        }

TKeyResponse CExampleShellContainer::OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType)
    {
        if      (iExampleControl)
                return iExampleControl->OfferKeyEventL(aKeyEvent,aType);
        else
                return EKeyWasNotConsumed;
    }

void CExampleShellContainer::Draw(const TRect& /*aRect*/) const
        {
        CWindowGc& gc = SystemGc();
        gc.SetPenStyle(CGraphicsContext::ENullPen);
        gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
        gc.DrawRect(Rect());
        }

//
// CExampleShellAppUi
//

_LIT(KTxtInitialized,"initialized");
void CExampleShellAppUi::ConstructL()
    {
    BaseConstructL();
        iModel=((CExampleShellDocument*)iDocument)->Model();
    iContainer=new(ELeave) CExampleShellContainer;
    iContainer->ConstructL(ClientRect(),iModel);
        iContainer->NotifyStatus(KTxtInitialized);
        // add container to stack; enables key event handling.
        AddToStackL(iContainer);
    }

void CExampleShellAppUi::HandleCommandL(TInt aCommand)
        {
        switch (aCommand)
                {
        case EExampleShellSelectDraw:
                iContainer->ResetExampleL(new (ELeave) CDrawControl);
                return;
        case EExampleShellSelectZoom:
                iContainer->ResetExampleL(new (ELeave) CZoomControl);
                return;
        case EEikCmdExit:
                Exit();
                return;
                }
        }

CExampleShellAppUi::~CExampleShellAppUi()
        {
        RemoveFromStack(iContainer);
    delete iContainer;
        }

//
// CExampleShellDocument
//

CEikAppUi* CExampleShellDocument::CreateAppUiL()
        {
    return(new(ELeave) CExampleShellAppUi);
        }

//
// CExampleShellApplication
//

TUid CExampleShellApplication::AppDllUid() const
        {
        return KUidExampleShellApp;
        }

CApaDocument* CExampleShellApplication::CreateDocumentL()
        {
        return new(ELeave) CExampleShellDocument(*this);
        }

//
// EXPORTed functions
//

EXPORT_C CApaApplication* NewApplication()
        {
        return new CExampleShellApplication;
        }


GLDEF_C TInt E32Main()
        {
        return EikStart::RunApplication(NewApplication);
        }

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