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      1 /*
      2  * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
      3  * Copyright (C) 2009 Girish Ramakrishnan <girish (at) forwardbias.in>
      4  * Copyright (C) 2006 George Staikos <staikos (at) kde.org>
      5  * Copyright (C) 2006 Dirk Mueller <mueller (at) kde.org>
      6  * Copyright (C) 2006 Zack Rusin <zack (at) kde.org>
      7  * Copyright (C) 2006 Simon Hausmann <hausmann (at) kde.org>
      8  *
      9  * All rights reserved.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     21  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     28  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef webview_h
     34 #define webview_h
     35 
     36 #include "fpstimer.h"
     37 #include "webpage.h"
     38 #include <qwebview.h>
     39 #include <qgraphicswebview.h>
     40 #include <QGraphicsView>
     41 #include <QGraphicsWidget>
     42 #include <QTime>
     43 
     44 QT_BEGIN_NAMESPACE
     45 class QStateMachine;
     46 QT_END_NAMESPACE
     47 
     48 class WebViewTraditional : public QWebView {
     49     Q_OBJECT
     50 
     51 public:
     52     WebViewTraditional(QWidget* parent) : QWebView(parent) {}
     53 
     54 protected:
     55     virtual void contextMenuEvent(QContextMenuEvent*);
     56     virtual void mousePressEvent(QMouseEvent*);
     57 };
     58 
     59 
     60 class GraphicsWebView : public QGraphicsWebView {
     61     Q_OBJECT
     62 
     63 public:
     64     GraphicsWebView(QGraphicsItem* parent = 0) : QGraphicsWebView(parent) {};
     65 
     66 protected:
     67     virtual void contextMenuEvent(QGraphicsSceneContextMenuEvent*);
     68     virtual void mousePressEvent(QGraphicsSceneMouseEvent*);
     69 };
     70 
     71 
     72 class WebViewGraphicsBased : public QGraphicsView {
     73     Q_OBJECT
     74     Q_PROPERTY(qreal yRotation READ yRotation WRITE setYRotation)
     75 
     76 public:
     77     WebViewGraphicsBased(QWidget* parent);
     78     void setPage(QWebPage* page);
     79 
     80     void setItemCacheMode(QGraphicsItem::CacheMode mode) { graphicsWebView()->setCacheMode(mode); }
     81     QGraphicsItem::CacheMode itemCacheMode() { return graphicsWebView()->cacheMode(); }
     82 
     83     void setFrameRateMeasurementEnabled(bool enabled);
     84     bool frameRateMeasurementEnabled() const { return m_measureFps; }
     85 
     86     virtual void resizeEvent(QResizeEvent*);
     87     virtual void paintEvent(QPaintEvent* event);
     88 
     89     void setResizesToContents(bool b);
     90     bool resizesToContents() const { return m_resizesToContents; }
     91 
     92     void setYRotation(qreal angle);
     93     qreal yRotation() const { return m_yRotation; }
     94 
     95     GraphicsWebView* graphicsWebView() const { return m_item; }
     96 
     97 public slots:
     98     void updateFrameRate();
     99     void animatedFlip();
    100     void animatedYFlip();
    101     void contentsSizeChanged(const QSize&);
    102     void scrollRequested(int, int);
    103 
    104 signals:
    105     void currentFPSUpdated(int fps);
    106 
    107 private:
    108     GraphicsWebView* m_item;
    109     int m_numPaintsTotal;
    110     int m_numPaintsSinceLastMeasure;
    111     QTime m_startTime;
    112     QTime m_lastConsultTime;
    113     QTimer* m_updateTimer;
    114     bool m_measureFps;
    115     qreal m_yRotation;
    116     bool m_resizesToContents;
    117     QStateMachine* m_machine;
    118     FpsTimer m_fpsTimer;
    119 };
    120 
    121 inline void WebViewGraphicsBased::setYRotation(qreal angle)
    122 {
    123     QRectF r = graphicsWebView()->boundingRect();
    124     graphicsWebView()->setTransform(QTransform()
    125         .translate(r.width() / 2, r.height() / 2)
    126         .rotate(angle, Qt::YAxis)
    127         .translate(-r.width() / 2, -r.height() / 2));
    128     m_yRotation = angle;
    129 }
    130 
    131 #endif
    132