| author | Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com> |
| Fri, 08 May 2009 08:25:06 +0300 | |
| changeset 1 | 7c90e6132015 |
| parent 0 | dd21522fd290 |
| 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 the License "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: RT Gesture helper interface |
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* |
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*/ |
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#ifndef _RT_GESTUREOBSERVER_H_ |
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#define _RT_GESTUREOBSERVER_H_ |
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#include <e32std.h> |
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namespace RT_GestureHelper |
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{
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/// flag that indicates gesture code is a holding code |
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/// clients should use MGestureEvent::IsHolding |
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const TInt EFlagHold = 0x10000000; |
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enum TGestureCode |
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{
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// states |
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EGestureStart = 0x00000001, // gesture just started (user pressed stylus down) |
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EGestureDrag = 0x00000002, // user moved stylus (may be holding or not holding) |
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EGestureReleased = 0x00000003, // user lifted stylus while user was holding |
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// gestures |
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EGestureUnknown = 0x00000005, // gesture was not recognised |
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// these codes are sent when user lifts stylus (if holding not started) |
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EGestureTap = 0x00000006, |
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EGestureDoubleTap = 0x00000007, // only if double tap is enabled |
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// (via CGestureHelper::SetDoubleTapEnabled or |
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// CGestureControl::SetDoubleTapEnabled) |
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EGestureSwipeLeft = 0x00000008, |
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EGestureSwipeRight = 0x00000009, |
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EGestureSwipeUp = 0x0000000A, |
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EGestureSwipeDown = 0x0000000B, |
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EGestureFlick = 0x0000000C, |
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EGestureLongTap = 0x0000000D, |
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EGestureDrop = 0x0000000E, |
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// these codes are sent when user initiates holding by keeping stylus in |
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// same place for a longer duration |
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EGestureHoldLeft = EGestureSwipeLeft | EFlagHold, |
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EGestureHoldRight = EGestureSwipeRight | EFlagHold, |
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EGestureHoldUp = EGestureSwipeUp | EFlagHold, |
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EGestureHoldDown = EGestureSwipeDown | EFlagHold |
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}; |
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/** |
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* Point of float accuracy |
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*/ |
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NONSHARABLE_STRUCT( TRealPoint ) |
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{
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inline TRealPoint(); |
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inline TRealPoint( const TRealPoint& aPoint ); |
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inline TRealPoint( TReal aX, TReal aY ); |
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inline TBool operator==( const TRealPoint& aPoint ) const; |
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TReal32 iX; |
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TReal32 iY; |
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}; |
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/** |
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* a gesture event |
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*/ |
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enum TAxis |
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{
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EAxisBoth, |
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EAxisHorizontal, |
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EAxisVertical |
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}; |
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class TGestureEvent |
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{
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public: |
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inline TGestureCode Code( TAxis /*aRelevantAxis*/ ) const { return iCode; };
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inline TBool IsHolding() const { return iIsHolding; };
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inline TPoint StartPos() const { return iStartPos; };
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inline TPoint CurrentPos() const { return iCurrPos; };
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inline TRealPoint Speed() const { return iSpeed; };
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inline TRealPoint SpeedPercent ( const TRect& /*aEdges*/ ) const { return iSpeedPercent; };
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inline TPoint Distance() const { return iDistance; };
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inline void SetCurrentPos(TPoint aPos) { iCurrPos = aPos; };
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inline void SetStartPos(TPoint aPos) {iStartPos = aPos; };
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inline void SetCode(TGestureCode aCode) {iCode = aCode; };
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inline void SetSpeed(TRealPoint aSpeed) { iSpeed = aSpeed; };
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inline void SetDistance(TPoint aDistance) { iDistance = aDistance; };
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inline void SetSpeedPercent(TRealPoint aSpeedPercent) { iSpeedPercent = aSpeedPercent; };
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inline void SetIsHolding(TBool aIsHolding) { iIsHolding = aIsHolding; };
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private: |
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TGestureCode iCode; |
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TBool iIsHolding; |
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TPoint iStartPos; |
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TPoint iCurrPos; |
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TRealPoint iSpeed; |
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TRealPoint iSpeedPercent; |
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TPoint iDistance; |
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}; |
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/** |
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* Observer that will be notified when user makes gestures |
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*/ |
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class MGestureObserver |
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{
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public: |
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/** |
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* Handle the gesture event |
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* @param aEvent event describing the gesture |
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*/ |
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virtual void HandleGestureL( const TGestureEvent& aEvent ) = 0; |
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}; |
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// ---------------------------------------------------------------------------- |
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// Default constructor for real point |
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// ---------------------------------------------------------------------------- |
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// |
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inline TRealPoint::TRealPoint() |
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: iX( 0 ), iY( 0 ) |
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{
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} |
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// ---------------------------------------------------------------------------- |
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// Copy constructor for real point |
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// ---------------------------------------------------------------------------- |
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// |
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inline TRealPoint::TRealPoint( const TRealPoint& aPoint ) |
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: iX( aPoint.iX ), iY( aPoint.iY ) |
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{
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} |
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// ---------------------------------------------------------------------------- |
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// Copy constructor for real point |
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// ---------------------------------------------------------------------------- |
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// |
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inline TRealPoint::TRealPoint( TReal aX, TReal aY ) |
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: iX( aX ), iY( aY ) |
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{
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} |
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// ---------------------------------------------------------------------------- |
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// Default constructor for real point |
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// ---------------------------------------------------------------------------- |
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// |
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inline TBool TRealPoint::operator==( const TRealPoint& aPoint ) const |
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{
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return iX == aPoint.iX && iY == aPoint.iY; |
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} |
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} // namespace RT_GestureHelper |
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#endif // _RT_GESTUREOBSERVER_H_ |