pieview.h Example File
itemviews/chart/pieview.h
#ifndef PIEVIEW_H
#define PIEVIEW_H
#include <QAbstractItemView>
class PieView : public QAbstractItemView
{
Q_OBJECT
public:
PieView(QWidget *parent = 0);
QRect visualRect(const QModelIndex &index) const override;
void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) override;
QModelIndex indexAt(const QPoint &point) const override;
protected slots:
void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight,
const QVector<int> &roles = QVector<int>()) override;
void rowsInserted(const QModelIndex &parent, int start, int end) override;
void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) override;
protected:
bool edit(const QModelIndex &index, EditTrigger trigger, QEvent *event) override;
QModelIndex moveCursor(QAbstractItemView::CursorAction cursorAction,
Qt::KeyboardModifiers modifiers) override;
int horizontalOffset() const override;
int verticalOffset() const override;
bool isIndexHidden(const QModelIndex &index) const override;
void setSelection(const QRect&, QItemSelectionModel::SelectionFlags command) override;
void mousePressEvent(QMouseEvent *event) override;
void mouseMoveEvent(QMouseEvent *event) override;
void mouseReleaseEvent(QMouseEvent *event) override;
void paintEvent(QPaintEvent *event) override;
void resizeEvent(QResizeEvent *event) override;
void scrollContentsBy(int dx, int dy) override;
QRegion visualRegionForSelection(const QItemSelection &selection) const override;
private:
QRect itemRect(const QModelIndex &item) const;
QRegion itemRegion(const QModelIndex &index) const;
int rows(const QModelIndex &index = QModelIndex()) const;
void updateGeometries() override;
int margin;
int totalSize;
int pieSize;
int validItems;
double totalValue;
QPoint origin;
QRubberBand *rubberBand;
};
#endif // PIEVIEW_H