/*
  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation; either version
  2 of the License, or (at your option) any later version.
*/

#ifndef PICTUREVIEWER2_H
#define PICTUREVIEWER2_H

#include <QGraphicsView>
#include <QList>
#include <QVariant>
#include <QGraphicsItem>
#include <QStaticText>

class QGraphicsScene;
class QGraphicsPixmapItem;
class QWheelEvent;
class QContextMenuEvent;
class QTimer;
class QTextDocument;
class QTextCursor;
class PictureViewer2Item;
class QGraphicsItem;
class SmTreeItem;
class MappingTreeModel;

typedef QList<QVariant> PicData;
typedef QList<QList<QVariant> > PicDataList;

class PictureViewer2 : public QGraphicsView {
    Q_OBJECT
    public:
        enum AssocActions { SlideAction, HideAction };
        explicit PictureViewer2(QWidget *parent = 0);
        void addFiles(const PicDataList &files, bool clear = true);
        void addFiles(const QString &dir, bool clear = true);
        void setFile(const PicData &file);
        void setFile(const QString &fullPath);
        PicData picData(const QString &fullPath);
        virtual QSize sizeHint() const;

    public slots:
        void next();
        void previous();
        void slide(bool);
        void readSettings();
        void writeSettings();
        void shuffle();
        void initActions();

    protected:
        virtual void wheelEvent(QWheelEvent *event);
        virtual void contextMenuEvent(QContextMenuEvent *e);
        virtual void keyPressEvent(QKeyEvent *e);
        virtual void hideEvent(QHideEvent *);

    private slots:
        void showFile(const PicData &data);
        void constructInfoItem(const PicData &file, QSize picSize);
        void constructMappingItem(const PicData &file);

    private:
        void setupDialog();
        void setGradient(const QPixmap &pic);
        QTextDocument *treeToString(const SmTreeItem *root) const;
        void treeToStringRecursive(const SmTreeItem *parent, QTextCursor *cursor, int indent) const;
        QPointF getPos(PictureViewer2Item *item, int pos, const QPointF &movPos);
        QString constructWindowTitle() const;
        PicDataList mFiles;
        QGraphicsScene *mScene;
        QSize mMinimunSize;
        QGraphicsPixmapItem *mCur;
        int mCurPos;
        int mConfigInfoPos;
        int mConfigMapPos;
        QTimer *mSlideTimer;
        const QString mDefaultFile;
        PictureViewer2Item *mFnItem;
        PictureViewer2Item *mMappingItem;
        bool mUseGradient;
        bool mShowInfoItem;
        bool mShowMapItem;
        QColor mBgColor;
        QPointF mInfoPos;
        QPointF mMappingPos;
        QAction *mSlideA;
        QAction *mHideA;
};

class PictureViewer2Item : public QGraphicsItem {
    public:
        explicit PictureViewer2Item(const PicData &data, const int numSelected, const QSize &picSize = QSize(), QGraphicsItem *parent = 0);
        explicit PictureViewer2Item(QTextDocument *doc, QGraphicsItem *parent = 0);
        ~PictureViewer2Item();
        QRectF boundingRect() const;
        void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

    private:
        QStaticText mText;
        QTextDocument *mDoc;
};

#endif // PICTUREVIEWER2_H