qt5base-lts/examples/itemviews/chart/pieview.h
Stephen Kelly f9caf48bee Use a QVector<int> instead of a QSet<int> in itemviews/models.
The QSet<int> is a more expensive container to use and create, so
it should be avoided.

This is source incompatible compared to earlier Qt 5 for
QAbstractItemView subclasses which reimplement dataChanged, but this
patch changes nothing compared to already-present SiC compared
to Qt 4.

Change-Id: Id95391dfd62a0a7f487a8765790b007badefb937
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
2012-06-12 04:30:07 +02:00

115 lines
3.9 KiB
C++

/****************************************************************************
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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#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, const QVector<int> & = 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