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examples/Graphics/Embedding/EmbeddingGraphicsControl.h

00001 // Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
00002 // All rights reserved.
00003 // This component and the accompanying materials are made available
00004 // under the terms of "Eclipse Public License v1.0"
00005 // which accompanies this distribution, and is available
00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
00007 //
00008 // Initial Contributors:
00009 // Nokia Corporation - initial contribution.
00010 //
00011 // Contributors:
00012 //
00013 // Description:
00014 //
00015 
00016 #ifndef __EmbeddingGraphicsControl_H
00017 #define __EmbeddingGraphicsControl_H
00018 
00019 #include <coecntrl.h>
00020 #include <s32file.h>
00021 
00022 //  For Picture example
00023 
00024 //      CSmileyPicture
00025 
00026 
00027 #include "CommonGraphicsControlFramework.h"
00028 
00029 class CSmileyPicture : public CPicture
00030         {
00031 public:
00032         enum TMood { EHappy, ENeutral, ESad }; // various moods
00033         enum TSizeSpec { ELarge, EMedium, ESmall }; // sizes
00034 
00035         // creating
00036         CSmileyPicture();
00037         static CSmileyPicture* NewL(TMood aMood, TSizeSpec aSizeSpec); // from scratch
00038         static CSmileyPicture* NewL(const CStreamStore& aStore, TStreamId aStreamId); // from stream
00039         TStreamId StoreL(CStreamStore& aStore) const;
00040         void Draw(CGraphicsContext& aGc,const TPoint& aTopLeft,const TRect& aClipRect,
00041                                                 MGraphicsDeviceMap* aMap)const; 
00042 
00043         void SetMood(TMood aMood); // set mood
00044         TMood Mood(); // get mood
00045         void SetSize(TSizeSpec aSizeSpec);      // set size
00046         TSizeSpec Size(); // get size
00047         TInt SpecToFactor() const;
00048 
00049         void GetOriginalSizeInTwips(TSize& aSize) const;
00050 
00051         // only needed for cropping and scaling
00052         void SetScaleFactor(TInt aScaleFactorWidth,TInt aScaleFactorHeight);
00053         void SetCropInTwips(const TMargins& aMargins);
00054         TPictureCapability Capability() const;
00055         void GetCropInTwips(TMargins& aMargins) const;
00056         TInt ScaleFactorWidth() const;
00057         TInt ScaleFactorHeight() const;
00058 private:
00059         // streaming
00060         void ExternalizeL(RWriteStream& aStream) const;         // externalize state
00061         void InternalizeL(RReadStream& aStream);                        // internalize state
00062 private:
00063         // member data - size and details of whether happy or sad
00064         TMood iMood;
00065         TSizeSpec iSizeSpec;
00066         };
00067 
00068 // sundry derived classes
00069 
00070 class CPictureControl : public CGraphicExampleControl
00071         {
00072 public:
00073         CPictureControl();
00074         ~CPictureControl() { delete(iPicture); };
00075         void UpdateModelL();
00076         void Draw(const TRect& aRect) const;
00077 private:
00078         enum TDocStatus { EFalse, EHeader, EPicture };
00079         TStreamId StoreHeaderL(CStreamStore& aStore) const;
00080         void StoreHeaderComponentsL(CStoreMap& aMap,CStreamStore& aStore) const;
00081         void RestoreHeaderL(CStreamStore& aStore, TStreamId aId);
00082 
00083         TZoomFactor testZf;
00084         MGraphicsDeviceMap* testMap;
00085 
00086         TDocStatus iValidDocument; // if false, then Draw() draws gray screen
00087         CSmileyPicture* iPicture; // if there, then draw
00088         TPictureHeader iHeader; // if no iPicture, draw outline to specified size
00089         TPoint iOffset; // offset of picture from top-left
00090         CFileStore* iStore; // stream store for persistence
00091         TStreamId iHeaderId;  // root stream of store
00092         };
00093 
00094 
00095 #endif
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