author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 00:10:37 +0200 | |
changeset 4 | 57d388cc48c1 |
parent 0 | 4e91876724a2 |
child 18 | 78ad99c24f08 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Declaration of Maths Engine |
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* |
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*/ |
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#ifndef GLXZOOMMATHSENGINE_H_ |
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#define GLXZOOMMATHSENGINE_H_ |
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// INCLUDE FILES |
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#include <e32base.h> |
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#include <glxzoomview.hrh> |
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NONSHARABLE_CLASS( TGlxZoomAndPanMathsEngine ) |
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{ |
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public: |
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/** |
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* Starts panning with keys |
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*@ param aOffset:Specifies the offset value with which image has to be shifted/panned |
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*/ |
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void Pan(TPoint aOffset, |
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TPoint& aViewPortTopLeft, |
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TGlxPanIncrementType aPanIncrement, |
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TBool* aThresholdReached = NULL); |
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|
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/** |
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* Starts zooming In/out with slider/Keys |
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* @ param aMfactor:The Zooming factor with which image has to be zoomed |
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*/ |
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TInt Zoom( TZoomMode aZoomMode, // Ignored when aExpectedZoomRatio has a value |
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TInt aExpectedZoomRatio, // only for slider based zoom. = 0 for key based zoom. |
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TPoint& aViewPortTopLeft, |
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TSize& aViewPortDimension, |
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TBool* apThresholdReached = NULL, |
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TPoint* apZoomFocus = NULL, |
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TInt aRelativeZoomFactor = 0); |
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// Initialize |
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void Initialize(TPoint& aCenter, |
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TSize& aScreenSize, |
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TSize& aImageSize, |
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TSize& aOriginalZoomedDimensions, |
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TUint8 aInitialZoomRatio); |
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void UpdatePanFactor(TTime& aPanTime); |
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// this can have a more generic name. but now it informs only abt screen orientation changes. and hence the name |
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void OrientationChanged(const TRect& aNewScreenRect); |
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TSize ImageVirtualSize(); |
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TSize ScreenSize(); |
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TInt NewCenterCoordinate(TInt Center, |
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TInt Offset, |
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TUint16 HalfScreenDimension, |
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TInt MinimumCoordinate, |
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TInt MaximumCoordinate, |
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TBool *aLimitReached = NULL) ; |
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void SetupPanOperation(); |
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TPoint LastPanOffset(); |
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private: |
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/** |
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* Get the next Zoomlevel on the basis of Zoom In/Out |
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* @ param aZoomMode:Specifies the zoomode,whether it is Zoom In/Out |
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* |
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* We ignore aZoommode and aRelativeZoomFactor if we have a aExpectedZoomRatio. |
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* We ignore aZoommode if we have a aRelativeZoomFactor. |
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* |
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*/ |
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TInt NewZoomRatio( |
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TInt aExpectedZoomRatio, |
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TInt aRelativeZoomFactor, |
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TZoomMode aZoomMode, |
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TBool *aThresholdReached = NULL) ; |
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TPoint iCenter ; |
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TSize iScreenSize ; |
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TSize iImageVirtualSize ; |
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TSize iActualImageSize ; |
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// The Purpose of this Variable is to set the No:of pixels, by which it should Pan, |
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// when the Key is held for long time. |
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TUint8 iPanFactor ; |
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// No of continuous pan operations that have happened. This is used in calculating the pan factor |
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TInt iContinuousPanOperations; |
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// These are the thresholds |
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TUint8 iMaxZoomRatio; |
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TUint8 iMinZoomRatio ; |
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TSize iInitialImageSize ; |
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// This is what our current zoom ratio is in percentage |
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TReal iZoomRatio; |
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TPoint iPanSpeed; // Pixels Panned per pan operation in vector form. |
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TPoint iLastPanOffset; // Pixels Panned during the last pan operation. |
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// [TODO]:Tsize might not be an exact match for this. using this only since it has exactly all the parameters that are required. |
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TSize iBorderWidth; |
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}; |
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#endif //GLXZOOMMATHSENGINE |