qt5base-lts/examples/widgets/itemviews/chart/pieview.h

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
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**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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****************************************************************************/
#ifndef PIEVIEW_H
#define PIEVIEW_H
#include <QAbstractItemView>
//! [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,
const QVector<int> &roles = QVector<int>());
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 // PIEVIEW_H