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 /* Temporary implementation of WebTouchNavigation until gestures are ready. */

    20 

    21 #ifndef WEBTOUCHNAVIGATION_H

    22 #define WEBTOUCHNAVIGATION_H

    23 

    24 #include <QTime>

    25 #include <qobject.h>

    26 #include <qpoint.h>

    27 #include <qevent.h>

    28 #include <qobject.h>

    29 #include <qtimeline.h>

    30 #include <qwebframe.h>

    31 #include <qwebelement.h>

    32 #include <QWebPage>

    33 #include "wrtBrowserDefs.h"

    34 

    35 

    36 class QWebFrame;

    37 class QWebPage;

    38 class QTimer;

    39 

    40 namespace GVA

    41 {

    42     class GWebContentViewWidget;

    43     class ChromeWidget;

    44 

    45     enum Direction

    46     {

    47         DOWN,           // SOUTH 

    48         UP,             // NORTH 

    49         RIGHT,          // EAST

    50         LEFT,           // WEST

    51         BOTTOMRIGHT,    // SOUTHEAST 

    52         BOTTOMLEFT,     // SOUTHWEST

    53         TOPLEFT,        // NORTHWEST

    54         TOPRIGHT        // NORTHEAST

    55     };

    56     

    57     enum PanDirection {

    58         HorizontalPan,

    59         VerticalPan,

    60         RandomPan 

    61     };

    62 

    63     class DragPoint

    64     {

    65     public:

    66         QPoint iPoint;

    67         QTime  iTime;

    68     };

    69 

    70     class GWebTouchNavigation : public QObject

    71     {

    72     Q_OBJECT

    73     public:

    74         GWebTouchNavigation(QWebPage* webPage, GWebContentViewWidget* view);

    75         virtual ~GWebTouchNavigation();

    76         void install();

    77         void uninstall();

    78         void setPage( QWebPage * page);

    79         bool enabled() const { return m_enabled; }

    80         void setEnabled(bool value) { m_enabled = value; }

    81         void setChromeWidget(ChromeWidget* chrome) { m_chrome = chrome;}

    82 

    83     signals:

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

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

    86         void pageScrollPositionZero();

    87         

    88         /// Sent when this object starts panning/scrolling the page.  Can be useful for

    89         /// cancelling things like long-press timers which otherwise wouldn't get

    90         /// mouse-move events.

    91         void startingPanGesture(int directionHint);

    92         void mouseEvent(QEvent::Type type);

    93 

    94     protected slots:

    95         void scrollToEdge();

    96 		void doubleClickTimerExpired();

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

    98 		void pan();

    99 		void kineticScroll();

   100 		void BlockFocusChanged(QPoint pt);

   101 		void onLoadStarted(); 

   102 		void onLoadFinished(bool ok);

   103     protected:

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

   105         void mousePressEvent(const QPoint& pos);

   106         void mouseMoveEvent(const QPoint& pos, const QPoint& diff);

   107         void mouseReleaseEvent(const QPoint& pos);

   108         void mouseDoubleClickEvent(const QPoint& pos);

   109         QWebFrame* getNextScrollableFrame(const QPoint& pos);

   110         void scrollFrame(const QPoint& diff);

   111   

   112         void startScrollTimer();

   113         void updateFlickScrollDistance();

   114         bool isFlick() ;

   115         QPoint speed() ;

   116         QPoint currentPos();

   117         QPoint previousPos();

   118         qreal dragTime() const;

   119         Direction findDirectionWithAngle(const QPoint& diff);

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

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

   122         int roundOff(qreal num);

   123         QRect findEnclosingBlock(QMouseEvent* ev);

   124         QWebHitTestResult getHitTestResult(QMouseEvent* ev);

   125         void calculateActualScrollDistance();

   126         void setNewScrollDistance(QPoint blockCanvasPoint, int thresholdCheckVal);

   127 		void handleMousePressEvent(QMouseEvent* ev);

   128 		void handleMouseReleaseEvent(QMouseEvent* ev);

   129         void handleDoubleClickEvent(QMouseEvent* ev);

   130 		

   131         

   132 	private:

   133 		void highlightableElement(QMouseEvent* ev);

   134 		QWebElement getClosestAnchorElement(QMouseEvent* ev);

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

   136 	    

   137 		void handleHighlightChange(QMouseEvent* ev);

   138 		bool canDehighlight(QMouseEvent* ev);

   139 		void dehighlight(QMouseEvent* ev);

   140 		void getFocusedElement();

   141 		void startTimer();

   142         void stopTimer();

   143 

   144         

   145         void stopScrolling();        

   146         void startPanGesture(PanDirection);

   147         void panBy(const QPointF& delta);

   148         void scrollCurrentFrame (int dx, int dy);

   149         void setCurrentFrameScrollPosition (QPoint& pos);

   150 

   151         Qt::KeyboardModifier getEventModifier(const QPoint& pos);

   152         

   153     private:

   154         QWebPage* m_webPage;

   155         GWebContentViewWidget* m_view;

   156         QWebFrame* m_frame;

   157         ChromeWidget* m_chrome;

   158         bool m_scrolled;

   159         QPoint m_touchPosition;

   160         QPointF m_scrollDistance;  

   161         QPointF m_actualScrollDistance;

   162         QPointF m_prevPoint;

   163         QList<DragPoint> m_dragPoints;

   164         Direction m_flickDirection;

   165         QTime m_lastMoveEventTime;

   166 		QTimer* m_doubleClickTimer;

   167         QMouseEvent *m_pressEvent;

   168         QMouseEvent *m_releaseEvent;

   169         QPoint m_focusedBlockPt;	

   170 		QWebElement m_anchorElement;

   171 		QPoint m_higlightedPos;

   172 		bool m_ishighlighted;

   173 		int m_offset;

   174 		QTimer* m_longPressTimer;// long press timer

   175 		QPoint m_initialSpeed;		

   176 		qreal m_finalzoomfactor;

   177 		QTimer* m_scrollTimer;

   178 		QPoint  m_scrollDelta;

   179 		QTimer* m_kineticTimer;

   180 		QPointF m_kineticSpeed;

   181 		QTime   m_actualTime;

   182 		int     m_kineticScrollTime;

   183 		QPoint  m_initialScrollPos;	

   184 		bool m_isPanning;

   185         QTime m_delayedPressMoment;

   186         QPointF m_dragStartPos;

   187         PanDirection m_panDirection;

   188         QPointF m_panModeResidue;		

   189         bool m_enabled;

   190         

   191     bool m_isLoading;    

   192     };

   193 

   194 }

   195 

   196 #endif