pieview.h Example File

itemviews/chart/pieview.h
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#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