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| |
| #ifndef PIEVIEW_H |
| #define PIEVIEW_H |
| |
| #include <QAbstractItemView> |
| |
| //! [0] |
| class PieView : public QAbstractItemView |
| { |
| Q_OBJECT |
| |
| public: |
| PieView(QWidget *parent = nullptr); |
| |
| 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 = 0; |
| int totalSize = 300; |
| int pieSize = totalSize - 2 * margin; |
| int validItems = 0; |
| double totalValue = 0.0; |
| QRubberBand *rubberBand = nullptr; |
| QPoint origin; |
| }; |
| //! [0] |
| |
| #endif // PIEVIEW_H |