Reenable the Qt4-PictureFlow

These patches now should integrate better into the StandardPanel etc.
Parts had to be rearranged to be able to merge some code from libqxt into the source.
Fix bugs due to PL/ML change

Patch by VlcVelope
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/components/playlist/views.cpp

@@ -378,11 +378,17 @@ PicFlowView::PicFlowView( PLModel *p_model, QWidget *parent ) : QAbstractItemVie
     QHBoxLayout *layout = new QHBoxLayout( this );
     layout->setMargin( 0 );
     picFlow = new PictureFlow( this, p_model );
-    picFlow->setSlideSize(QSize(128,128));
     layout->addWidget( picFlow );
+    picFlow->setSlideSize(QSize( 4*LISTVIEW_ART_SIZE, 3*LISTVIEW_ART_SIZE) );
     setSelectionMode( QAbstractItemView::SingleSelection );
 }
 
+void PicFlowView::setModel( QAbstractItemModel *model )
+{
+    QAbstractItemView::setModel( model );
+    picFlow->setModel( model );
+}
+
 int PicFlowView::horizontalOffset() const
 {
     return 0;

modules/gui/qt4/components/playlist/views.hpp

@@ -104,6 +104,7 @@ public:
     virtual QRect visualRect(const QModelIndex&) const;
     virtual void scrollTo(const QModelIndex&, QAbstractItemView::ScrollHint);
     virtual QModelIndex indexAt(const QPoint&) const;
+    virtual void setModel(QAbstractItemModel *model);
 
 protected:
     virtual int horizontalOffset() const;

modules/gui/qt4/util/pictureflow.hpp

 /*
   PictureFlow - animated image show widget
   http://pictureflow.googlecode.com
+    and
+  http://libqxt.org  <foundation@libqxt.org>
 
   Copyright (C) 2009 Ariya Hidayat (ariya@kde.org)
   Copyright (C) 2008 Ariya Hidayat (ariya@kde.org)
   Copyright (C) 2007 Ariya Hidayat (ariya@kde.org)
 
+  Copyright (C) Qxt Foundation. Some rights reserved.
+
   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
@@ -28,9 +32,23 @@
 #ifndef PICTUREFLOW_H
 #define PICTUREFLOW_H
 
-#include <qwidget.h>
+#include <QApplication>
+#include <QCache>
+#include <QHash>
+#include <QImage>
+#include <QKeyEvent>
+#include <QPainter>
+#include <QPixmap>
+#include <QTimer>
+#include <QVector>
+#include <QWidget>
+#include <QAbstractItemModel>
+#include <QPersistentModelIndex>
+#include <QList>
+
 #include "../components/playlist/playlist_model.hpp" /* getArtPixmap etc */
 
+
 class PictureFlowPrivate;
 
 /*!
@@ -70,6 +88,9 @@ public:
     */
     ~PictureFlow();
 
+    void setModel(QAbstractItemModel * model);
+    QAbstractItemModel * model();
+
     /*!
       Returns the background color.
     */
@@ -158,6 +179,7 @@ protected:
     void paintEvent(QPaintEvent *event);
     void keyPressEvent(QKeyEvent* event);
     void mousePressEvent(QMouseEvent* event);
+    void wheelEvent(QWheelEvent* event);
     void resizeEvent(QResizeEvent* event);
 
 private slots:
@@ -167,5 +189,197 @@ private:
     PictureFlowPrivate* d;
 };
 
+// for fixed-point arithmetic, we need minimum 32-bit long
+// long long (64-bit) might be useful for multiplication and division
+typedef long PFreal;
+#define PFREAL_SHIFT 10
+#define PFREAL_ONE (1 << PFREAL_SHIFT)
+
+#define IANGLE_MAX 1024
+#define IANGLE_MASK 1023
+
+inline PFreal fmul(PFreal a, PFreal b)
+{
+    return ((long long)(a))*((long long)(b)) >> PFREAL_SHIFT;
+}
+
+inline PFreal fdiv(PFreal num, PFreal den)
+{
+    long long p = (long long)(num) << (PFREAL_SHIFT * 2);
+    long long q = p / (long long)den;
+    long long r = q >> PFREAL_SHIFT;
+
+    return r;
+}
+
+inline PFreal fsin(int iangle)
+{
+    // warning: regenerate the table if IANGLE_MAX and PFREAL_SHIFT are changed!
+    static const PFreal tab[] = {
+        3,    103,    202,    300,    394,    485,    571,    652,
+        726,    793,    853,    904,    947,    980,   1004,   1019,
+        1023,   1018,   1003,    978,    944,    901,    849,    789,
+        721,    647,    566,    479,    388,    294,    196,     97,
+        -4,   -104,   -203,   -301,   -395,   -486,   -572,   -653,
+        -727,   -794,   -854,   -905,   -948,   -981,  -1005,  -1020,
+        -1024,  -1019,  -1004,   -979,   -945,   -902,   -850,   -790,
+        -722,   -648,   -567,   -480,   -389,   -295,   -197,    -98,
+        3
+    };
+
+    while (iangle < 0)
+        iangle += IANGLE_MAX;
+    iangle &= IANGLE_MASK;
+
+    int i = (iangle >> 4);
+    PFreal p = tab[i];
+    PFreal q = tab[(i+1)];
+    PFreal g = (q - p);
+    return p + g *(iangle - i*16) / 16;
+}
+
+inline PFreal fcos(int iangle)
+{
+    return fsin(iangle + (IANGLE_MAX >> 2));
+}
+
+struct SlideInfo {
+    int slideIndex;
+    int angle;
+    PFreal cx;
+    PFreal cy;
+    int blend;
+};
+
+class PictureFlow;
+
+class PictureFlowState
+{
+public:
+    PictureFlowState();
+    ~PictureFlowState();
+
+    void reposition();
+    void reset();
+
+    QRgb backgroundColor;
+    int slideWidth;
+    int slideHeight;
+    PictureFlow::ReflectionEffect reflectionEffect;
+
+    int angle;
+    int spacing;
+    PFreal offsetX;
+    PFreal offsetY;
+
+    VLCModel *model;
+    SlideInfo centerSlide;
+    QVector<SlideInfo> leftSlides;
+    QVector<SlideInfo> rightSlides;
+    int centerIndex;
+};
+
+class PictureFlowAnimator
+{
+public:
+    PictureFlowAnimator();
+    PictureFlowState* state;
+
+    void start(int slide);
+    void stop(int slide);
+    void update();
+
+    int target;
+    int step;
+    int frame;
+    QTimer animateTimer;
+};
+
+class PictureFlowAbstractRenderer
+{
+public:
+    PictureFlowAbstractRenderer(): state(0), dirty(false), widget(0) {}
+    virtual ~PictureFlowAbstractRenderer() {}
+
+    PictureFlowState* state;
+    bool dirty;
+    QWidget* widget;
+
+    virtual void init() = 0;
+    virtual void paint() = 0;
+};
+
+class PictureFlowSoftwareRenderer: public PictureFlowAbstractRenderer
+{
+public:
+    PictureFlowSoftwareRenderer();
+    ~PictureFlowSoftwareRenderer();
+
+    virtual void init();
+    virtual void paint();
+
+private:
+    QSize size;
+    QRgb bgcolor;
+    int effect;
+    QImage buffer;
+    QVector<PFreal> rays;
+    QImage* blankSurface;
+
+    void render();
+    void renderSlides();
+    QRect renderSlide(const SlideInfo &slide, int col1 = -1, int col2 = -1);
+    QImage* surface(QModelIndex);
+    QHash<QString, QImage*> cache;
+};
+
+class PictureFlowPrivate : public QObject
+{
+    Q_OBJECT
+public:
+    PictureFlowState* state;
+    PictureFlowAnimator* animator;
+    PictureFlowAbstractRenderer* renderer;
+    QTimer triggerTimer;
+    void setModel(QAbstractItemModel * model);
+    void clear();
+    void triggerRender();
+    void insertSlide(int index, const QImage& image);
+    void replaceSlide(int index, const QImage& image);
+    void removeSlide(int index);
+    void setCurrentIndex(QModelIndex index);
+    void showSlide(int index);
+
+    int picrole;
+    int textrole;
+    int piccolumn;
+    int textcolumn;
+
+    void reset();
+
+    QList<QPersistentModelIndex> modelmap;
+    QPersistentModelIndex currentcenter;
+
+    QPoint lastgrabpos;
+    QModelIndex rootindex;
+
+public Q_SLOTS:
+    void columnsAboutToBeInserted(const QModelIndex & parent, int start, int end);
+    void columnsAboutToBeRemoved(const QModelIndex & parent, int start, int end);
+    void columnsInserted(const QModelIndex & parent, int start, int end);
+    void columnsRemoved(const QModelIndex & parent, int start, int end);
+    void dataChanged(const QModelIndex & topLeft, const QModelIndex & bottomRight);
+    void headerDataChanged(Qt::Orientation orientation, int first, int last);
+    void layoutAboutToBeChanged();
+    void layoutChanged();
+    void modelAboutToBeReset();
+    void modelReset();
+    void rowsAboutToBeInserted(const QModelIndex & parent, int start, int end);
+    void rowsAboutToBeRemoved(const QModelIndex & parent, int start, int end);
+    void rowsInserted(const QModelIndex & parent, int start, int end);
+    void rowsRemoved(const QModelIndex & parent, int start, int end);
+};
+
+
 #endif // PICTUREFLOW_H