1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 #ifndef WEBTOUCHNAVIGATION_H

    20 #define WEBTOUCHNAVIGATION_H

    21 

    22 #include <QTime>

    23 #include <qobject.h>

    24 #include <qpoint.h>

    25 #include <qevent.h>

    26 #include <qobject.h>

    27 #include <qtimeline.h>

    28 #include <qwebframe.h>

    29 #include <qwebelement.h>

    30 #include "wrtBrowserDefs.h"

    31 #include <QTime>

    32 

    33 class QWebFrame;

    34 class QWebPage;

    35 class QTimer;

    36 

    37 namespace WRT 

    38 {

    39 

    40     enum Direction

    41     {

    42         DOWN,           // SOUTH 

    43         UP,             // NORTH 

    44         RIGHT,          // EAST

    45         LEFT,           // WEST

    46         BOTTOMRIGHT,    // SOUTHEAST 

    47         BOTTOMLEFT,     // SOUTHWEST

    48         TOPLEFT,        // NORTHWEST

    49         TOPRIGHT        // NORTHEAST

    50     };

    51 

    52     enum PanDirection {

    53         HorizontalPan,

    54         VerticalPan,

    55         RandomPan 

    56     };

    57 

    58     class DragPoint

    59     {

    60     public:

    61         QPoint iPoint;

    62         QTime  iTime;

    63     };

    64 

    65     class WebTouchNavigation : public QObject

    66     {

    67     Q_OBJECT

    68     public:

    69         WebTouchNavigation(QWebPage* webPage,QObject* view);

    70         virtual ~WebTouchNavigation();

    71         void install();

    72         void uninstall();

    73         void setPage( QWebPage * page){ m_webPage = page ;}

    74 signals:

    75         void longPressEvent();// mouse long press signal    

    76         void focusElementChanged(wrtBrowserDefs::BrowserElementType &);// mouse long press signal

    77         void pageScrollPositionZero();

    78 

    79     protected slots:

    80         void scrollToEdge();

    81 		void doubleClickTimerExpired();

    82 		void timerControl();// local slot for controlling timer

    83 		void pan();

    84 		void kineticScroll();

    85 		void BlockFocusChanged(QPoint pt);

    86     protected:

    87         bool eventFilter(QObject *object, QEvent *event);

    88         void mousePressEvent(const QPoint& pos);

    89         void mouseMoveEvent(const QPoint& pos);

    90         void mouseReleaseEvent(const QPoint& pos);

    91         void mouseDoubleClickEvent(const QPoint& pos);

    92         QWebFrame* getNextScrollableFrame(const QPoint& pos);

    93         void scrollFrame(const QPoint& pos);

    94   

    95         void startScrollTimer();

    96         void updateFlickScrollDistance();

    97         bool isFlick() ;

    98         QPoint speed() ;

    99         QPoint currentPos();

   100         QPoint previousPos();

   101         qreal dragTime() const;

   102         Direction findDirectionWithAngle(const QPoint& stPoint,const QPoint& endPoint);

   103         bool isNear(qreal aAngleUnderTest, qreal aMinAngle, qreal aMaxAngle);

   104         qreal findAngle(const int& xDelta,const int& yDelta);

   105         int roundOff(qreal num);

   106         QRect findEnclosingBlock(QMouseEvent* ev);

   107         QWebHitTestResult getHitTestResult(QMouseEvent* ev);

   108         void calculateActualScrollDistance();

   109         void setNewScrollDistance(QPoint blockCanvasPoint, int thresholdCheckVal);

   110 		void handleMousePressEvent(QMouseEvent* ev);

   111 		void handleMouseReleaseEvent(QMouseEvent* ev);

   112         void handleDoubleClickEvent(QMouseEvent* ev);

   113 		

   114         

   115 	private:

   116 		void highlightableElement(QMouseEvent* ev);

   117 		QWebElement getClosestAnchorElement(QMouseEvent* ev);

   118 		bool traverseNextNode(QWebElement parentNode,QWebElement& nextNode);

   119 	    

   120 		void handleHighlightChange(QMouseEvent* ev);

   121 		bool canDehighlight(QMouseEvent* ev);

   122 		void dehighlight(QMouseEvent* ev);

   123 		void getFocusedElement();

   124 		void startTimer();

   125         void stopTimer();

   126 

   127         

   128         void stopScrolling();

   129 

   130         void startPanGesture(PanDirection);

   131         void panBy(const QPointF& delta);

   132         void scrollCurrentFrame (int dx, int dy);

   133         void setCurrentFrameScrollPosition (QPoint& pos);

   134         

   135     private:

   136         QWebPage* m_webPage;

   137         QObject* m_view;

   138         QWebFrame* m_frame;

   139         bool m_scrolled;

   140         QPoint m_touchPosition;

   141         QPointF m_scrollDistance;  

   142         QPointF m_actualScrollDistance;

   143         QPointF m_prevPoint;

   144         QList<DragPoint> m_dragPoints;

   145         Direction m_flickDirection;

   146         QTime m_lastMoveEventTime;

   147 		QTimer* m_doubleClickTimer;

   148         QMouseEvent *m_pressEvent;

   149         QMouseEvent *m_releaseEvent;

   150         QPoint m_focusedBlockPt;	

   151 		QWebElement m_anchorElement;

   152 		QPoint m_higlightedPos;

   153 		bool m_ishighlighted;

   154 		int m_offset;

   155 		QTimer* m_longPressTimer;// long press timer

   156 		QPoint m_initialSpeed;		

   157 		qreal m_finalzoomfactor;

   158 		QTimer* m_scrollTimer;

   159 		QPoint  m_scrollDelta;

   160 		QTimer* m_kineticTimer;

   161 		QPointF m_kineticSpeed;

   162 		QTime   m_actualTime;

   163 		int     m_kineticScrollTime;

   164 		QPoint  m_initialScrollPos;

   165         bool m_isPanning;

   166         QTime m_delayedPressMoment;

   167         QPointF m_dragStartPos;

   168         PanDirection m_panDirection;

   169         QPointF m_panModeResidue;		

   170 		

   171 	};

   172 

   173 }

   174 

   175 #endif