multi_color_packet_delegate.h

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#ifndef MULTI_COLOR_PACKET_DELEGATE_H
#define MULTI_COLOR_PACKET_DELEGATE_H
 
#include <config.h>
#include <QStyledItemDelegate>
 
class QPainter;
class PinnedColumnView;
class PinnedRowView;

struct OverlayWidget {
    const PinnedColumnView *column_view = nullptr;
    const PinnedRowView *row_view = nullptr;
 
    static OverlayWidget resolve(const QWidget *widget);
};

class MultiColorPacketDelegate : public QStyledItemDelegate
{
    Q_OBJECT
public:
    MultiColorPacketDelegate(QWidget *parent = 0);

    bool paintMultiColorBackground(QPainter *painter, const QStyleOptionViewItem &option,
                                   const QModelIndex &index, QColor *fg_out = nullptr) const;
 
protected:
    void paint(QPainter *painter, const QStyleOptionViewItem &option,
               const QModelIndex &index) const override;
 
private:
    QColor calculateForeground(const QList<QColor> &backgrounds) const;

    void drawStripedBackground(QPainter *painter, const QStyleOptionViewItem &option,
                               const QList<QColor> &colors, const OverlayWidget &overlay) const;

    void drawShiftRightBackground(QPainter *painter, const QStyleOptionViewItem &option,
                                  const QList<QColor> &colors, const OverlayWidget &overlay) const;
};
 
#endif // MULTI_COLOR_PACKET_DELEGATE_H