author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 08:45:44 +0200 | |
changeset 0 | 4e91876724a2 |
child 1 | 9ba538e329bd |
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: Zoom Event Handler |
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* |
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*/ |
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#ifndef GLXZOOMEVENTHANDLER_H_ |
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#define GLXZOOMEVENTHANDLER_H_ |
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#include "glxzoomview.hrh" |
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#include "glxfullscreenview.hrh" |
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#include "glxzoommathsengine.h" |
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//Alf Headers |
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#include <alf/alfevent.h> // For Key Events |
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#include <alf/alftimedvalue.h> // for TAlfRealPoint |
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#include <alf/alftypes.h> |
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#include <alf/alftypes.h> |
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#include <gesturehelper.h> |
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#include <gestureobserver.h> |
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// FORWARD DECLARATIONS |
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class CGlxZoomControl; |
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class TGlxZoomAndPanMathsEngine; |
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class MGlxZoomEventHandlers; |
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class CGlxZoomPanEventHandler : public CBase |
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{ |
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public: |
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/** |
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* Two-phased constructor. |
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* @param aZoomEventHandler: Handler for ZoomControl commands. |
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*/ |
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static CGlxZoomPanEventHandler* NewL(MGlxZoomEventHandlers& aZoomEventHandler ); |
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/** |
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* Destructor. |
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*/ |
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~CGlxZoomPanEventHandler(); |
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/** |
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* Two stop shop to handle all alf events. [PRASH] Make this a one stop shop |
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*/ |
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TBool HandleEventL(const TAlfEvent &aEvent ); |
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TBool HandleEvent( const TAlfEvent& aEvent ); |
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/** |
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* Cancel the timer for continous zooming |
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*/ |
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void CancelZoomPanTimer(); |
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/* |
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* ActivateZoom from the Zoom control |
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*/ |
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void ActivateZoom(TInt initialZoomRatio, |
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TSize imageSize, |
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TZoomStartMode aStartMode, |
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TInt aMinSliderRange, |
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TInt aMaxSliderRange, |
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TSize& aOriginalDimensions, |
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TPoint* aZoomFocus); |
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/* |
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* DeactivateZoom from the Zoom control |
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*/ |
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void DeactivateZoom(); |
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/* |
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* OrientationChanged |
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*/ |
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void OrientationChanged(const TRect& aNewScreenRect) ; |
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/* |
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* ZoomIsActivated |
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* This is called when the zoom is activated/deactivated from Zoom control |
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*/ |
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void SetZoomActivated(TBool aIsActivated = EFalse); |
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/* |
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* ZoomUiState |
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* This is called when the zoom state in Zoom control is changed |
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*/ |
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void SetZoomUiState(TUiState aZoomUiState); |
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/* |
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* ZoomUiState |
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* This is called when the zoom state in Zoom control is changed |
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*/ |
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TUiState ZoomUiState(); |
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/** |
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* Handle the drag events for panning |
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*/ |
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void HandleDragEvent(const GestureHelper::MGestureEvent& aEvent ); |
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void HandlePinchEventL(const GestureHelper::MGestureEvent& aEvent); |
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void HandleDoubleTap(const GestureHelper::MGestureEvent& aEvent ); |
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void HandleSingleTap(const GestureHelper::MGestureEvent& aEvent ); |
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void HandleGestureReleased(const GestureHelper::MGestureEvent& aEvent ); |
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void SetPreviousEventCode(const GestureHelper::TGestureCode code ); |
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void HandleMultiTouchReleased(); |
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private: |
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/* |
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* Constructor |
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*/ |
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CGlxZoomPanEventHandler(MGlxZoomEventHandlers& aZoomEventHandler); |
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/* |
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* ConstructL |
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*/ |
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void ConstructL(); |
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/** |
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* This Function handles all the KeyEvents |
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*/ |
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TBool HandlekeyEvents(const TAlfEvent &aEvent); |
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/** |
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* Callback function for zoom |
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*/ |
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static TInt ZoomIntervalExpired(TAny* aPtr); |
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/** |
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* Callback function for pan |
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*/ |
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static TInt PanIntervalExpired(TAny* aPtr); |
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/** |
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* Start zoom in/out continously |
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*/ |
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void DoZoom(); |
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// Zoom by the next zoom increment. |
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// aZoomMode is ignored if aExpectedZoomLevel has a positive value |
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void Zoom(TInt aExpectedZoomLevel, TInt aRelativeZoomFactor, TZoomMode aZoomMode = EZoomIn, TPoint* aZoomFocus = NULL); |
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/** |
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* Start Panning continously |
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*/ |
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void DoPan(); |
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/** |
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* Starts the timer for continous zooming |
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*/ |
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void StartZoomTimer(); |
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/** |
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* Starts the timer for continous Panning |
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*/ |
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void StartPanTimer(); |
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/** |
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* Stops the timer for showing the UI. |
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*/ |
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void CancelUITimer(); |
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/** |
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* Starts the timer for showing the UI. |
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*/ |
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void StartUITimer(TTimeIntervalMicroSeconds32 aDelay, |
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TTimeIntervalMicroSeconds32 anInterval, |
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TCallBack aCallBack) ; |
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/** |
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*Call back function to Turn off UI/Screen Furniture[Back Key/Slider]. |
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*/ |
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static TInt UiTimeOut(TAny* aSelf); |
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/* |
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* Timer callback for zoomout |
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*/ |
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static TInt ZoomOutTimerL(TAny* aSelf); |
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/** |
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* Handle zoom key pressed or released. |
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* @param aZoomIn :ETrue for Zoom In key, EFalse for Zoom Out key |
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* @param aEventCode :Type of key event. |
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*/ |
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void HandleZoomKey(TZoomMode aZoomMode, const TEventCode aEventCode); |
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/** |
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* Handle the key events for panning |
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* @param aPanDirection: Specifies the pan direction |
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* @param aEvent : Specifies the event values. |
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*/ |
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TBool HandlePanKey(const TAlfEvent &aEvent); |
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|
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/** |
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* Handle zoom stripe key pressed. |
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* @param aZoomIn :ETrue for Zoom In key, EFalse for Zoom Out key |
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* @param aEventCode :Type of key event. |
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*/ |
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void HandleZoomStripeAction(TZoomMode aZoomMode ,TEventCode aEventCode); |
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/** |
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* Handle the drag events for panning |
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*/ |
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void HandleDragEvent(const TPoint &aTapPoint); |
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/* |
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* ShowSliderTillTimeout |
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*/ |
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void ShowSliderTillTimeout() ; |
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/* |
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* ShowScreenFurniture |
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* aTimeout == 0 means no timeout. |
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*/ |
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void ShowScreenFurniture(TTimeIntervalMicroSeconds32 aTimeout); |
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/* |
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* HideScreenFurniture |
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*/ |
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void HideScreenFurniture(); |
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/* |
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* SetupPanOperation |
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*/ |
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void SetupPanOperation(TPoint& aPanDirection); |
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void CallZoomOutL(); |
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void SetupAnimatedZoom(TZoomMode aZoomMode, TPoint * aZoomFocus = NULL); |
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static TInt ActivationIntervalElapsed(TAny* aPtr) ; |
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void NextStepAnimatedZoom(); |
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void SetupAnimatedPan() ; |
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static TInt PanInertiaFrameElapsed(TAny* aPtr); |
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void NextStepInerticPan(); |
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void CancelAnimationTimer(); |
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private: |
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MGlxZoomEventHandlers& iZoomEventHandler; |
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TTime iPanTime; // The Purpose of this Variable is to determine the Time,for how long the key was held |
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TZoomMode iZoomMode; // Says whether we are zooming in or out. |
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TPoint iPanDirection; // This gives the direction of the panning that has to be done |
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TInt iMinZoomRatio; // The minimum value that the Zoom Slider will have |
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TInt iMaxZoomRatio; // The maximum value that the Zoom Slider will have |
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CPeriodic* iUiTimer; // The Timer used to Hide the UI/Screen Furniture[Back Key/Slider] after 2 seconds |
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CPeriodic* iZoomPanTimer; // The Timer used for Zooming/Panning the Image Exponentially |
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TPoint iStartDisplayPoint; // The variable holds the starting pointer posistion to determine the Drag Distance |
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TTime iDoubleTap; // This Variable is used to determine the double tap,by using the difference of the time |
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// between subsequent single Tap. |
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// [todo] do we need this variable to be global |
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TInt iZoomRatio; |
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TRect iDoubleTapRect; // This varaible holds the rect for the Double Tap |
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TBool iDragOngoing; // Is a drag event ongoing |
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TBool iZoomActivated; // To Denote if zoom is activated |
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TUiState iZoomUiState; // To Denote if the Ui is On in zoom |
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TPoint iPreviousPointerPosition; |
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TPoint iPreviousDragStartPosition; |
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// for the animated zoom to 50 % allowed. |
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TBool iIsZoomingInAnimatedState; |
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TAnimationMode iAnimatedZoomMode; |
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CPeriodic* iZoomAnimationTimer; |
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TInt iZoomPerInterval; |
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TInt iTargetAnimatedZoomRatio; |
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// for the animated zoom to 50 % allowed. END |
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// For considering Zoom Focus. |
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TPoint iZoomFocus; // Not used right now. WIll soon carry the coordinates of the zoom focus. |
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// For considering Zoom Focus. END |
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// For Pan Inertia. |
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GestureHelper::TGestureCode iPreviousGestureCode ; |
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// For Pan Inertia. END |
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TGlxZoomAndPanMathsEngine iMathsEngine; // The new Maths engine at the core of the Zoom Component |
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}; |
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#endif /* GLXZOOMEVENTHANDLER_H_ */ |