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 VISUALFLOWLITE_H

    20 #define VISUALFLOWLITE_H

    21 

    22 #include <QWidget>

    23 #include <QKeyEvent>

    24 #include "FlowInterface.h"

    25 

    26 class QPainter;

    27 

    28 namespace WRT {

    29 

    30 class VisualFlowLite : public FlowInterface

    31 {

    32 Q_OBJECT

    33 public:

    34     VisualFlowLite(QWidget* parent);

    35     void init();

    36     void addSlide(const QImage& image);

    37     void clear();

    38     int slideCount() const;

    39     QImage slide(int index) const;

    40     void setCenterIndex(int i);

    41     int centerIndex() const;

    42     bool slideAnimationOngoing() const;

    43     void setCenterThumbnail(int i);

    44     void setCurrentIndex(int i);

    45     virtual ~VisualFlowLite();

    46     void keyPressEvent(QKeyEvent* event);

    47     void paintEvent(QPaintEvent* event);

    48     void calculateLayout();

    49     void showPrevious();

    50     void showNext();

    51     void paintNormalState(QPaintEvent* event);

    52     void paintInTransition(QPaintEvent* event);

    53     void setImagesScaled(bool scaled) { m_scalingAllowed = scaled; }

    54     QRect centralRect() const;

    55 

    56 signals:

    57     void centerIndexChanged(int index);

    58     void ok(int index);

    59     void cancel();

    60 

    61 public slots:

    62     bool calcRepaintRect();

    63     bool animatePlaceHolderPosition();

    64     void scroll();

    65 

    66 protected:

    67     void mousePressEvent(QMouseEvent* event);

    68     void resizeEvent(QResizeEvent* event);

    69     void mouseMoveEvent(QMouseEvent* event);

    70     void mouseReleaseEvent(QMouseEvent* event);

    71 

    72 private:

    73     enum PaintState {

    74         paintStateNormal,

    75         paintStateInTransition

    76     };

    77 

    78     void paintImage(QPainter* painter, QRect rect, QImage image);

    79 

    80     // indicates the index of the center thumbnail

    81     int                      m_centerPageIndex;

    82     QRect                    m_offscreenRect;

    83     // represents the entry corresponding to the selected page in view

    84     // timer used to do animation

    85     QTimer*                   m_repaintTimer;

    86     //repaint rect using during animating initial display of the view

    87     QRect                    m_repaintRect;

    88     //resize factor applied during initial display animation

    89     int                      m_resizeFactor;

    90     //left place holder rectangle

    91     QRect                    m_leftPlaceHolderRect;

    92     //left place holder rectangle

    93     QRect                    m_centerPlaceHolderRect;

    94     //left place holder rectangle

    95     QRect                    m_rightPlaceHolderRect;

    96     //Left Arrow position

    97     QPoint                   m_leftArrow[3];

    98     //Right arrow position

    99     QPoint                   m_rightArrow[3];

   100     //Factor used during animation of place holders

   101     int                      m_placeHolderResizeFactor;

   102     //Direction of movement

   103     int                      m_direction;

   104     //Flag to check if fast animation is needed or not

   105     bool                     m_fastScroll;

   106     PaintState               m_paintState;

   107     // Initial position 

   108     int m_currentIndex;

   109     QList<const QImage*> m_imageList;

   110     QPoint m_lastMoveEventPos;

   111     QTimer* m_scrollTimer;

   112     bool m_scalingAllowed;

   113 };

   114 

   115 }

   116 #endif      // VISUALFLOWLITE_H

   117