/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the examples of the Qt Toolkit.

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef PIEVIEW_H

#define PIEVIEW_H

#include <QAbstractItemView>

#include <QFont>

#include <QItemSelection>

#include <QItemSelectionModel>

#include <QModelIndex>

#include <QRect>

#include <QSize>

#include <QPoint>

#include <QWidget>

QT_BEGIN_NAMESPACE

class QRubberBand;

QT_END_NAMESPACE

//! [0]

class PieView : public QAbstractItemView

{

    Q_OBJECT

public:

    PieView(QWidget *parent = 0);

    QRect visualRect(const QModelIndex &index) const;

    void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible);

    QModelIndex indexAt(const QPoint &point) const;

protected slots:

    void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);

    void rowsInserted(const QModelIndex &parent, int start, int end);

    void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end);

protected:

    bool edit(const QModelIndex &index, EditTrigger trigger, QEvent *event);

    QModelIndex moveCursor(QAbstractItemView::CursorAction cursorAction,

                           Qt::KeyboardModifiers modifiers);

    int horizontalOffset() const;

    int verticalOffset() const;

    bool isIndexHidden(const QModelIndex &index) const;

    void setSelection(const QRect&, QItemSelectionModel::SelectionFlags command);

    void mousePressEvent(QMouseEvent *event);

    void mouseMoveEvent(QMouseEvent *event);

    void mouseReleaseEvent(QMouseEvent *event);

    void paintEvent(QPaintEvent *event);

    void resizeEvent(QResizeEvent *event);

    void scrollContentsBy(int dx, int dy);

    QRegion visualRegionForSelection(const QItemSelection &selection) const;

private:

    QRect itemRect(const QModelIndex &item) const;

    QRegion itemRegion(const QModelIndex &index) const;

    int rows(const QModelIndex &index = QModelIndex()) const;

    void updateGeometries();

    int margin;

    int totalSize;

    int pieSize;

    int validItems;

    double totalValue;

    QPoint origin;

    QRubberBand *rubberBand;

};

//! [0]

#endif