// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QITEMDELEGATE_H
#define QITEMDELEGATE_H

#include <QtWidgets/qtwidgetsglobal.h>
#include <QtWidgets/qabstractitemdelegate.h>
#include <QtCore/qstring.h>
#include <QtGui/qpixmap.h>
#include <QtCore/qvariant.h>

QT_REQUIRE_CONFIG(itemviews);

QT_BEGIN_NAMESPACE

class QItemDelegatePrivate;
class QItemEditorFactory;

class Q_WIDGETS_EXPORT QItemDelegate : public QAbstractItemDelegate
{
    Q_OBJECT
    Q_PROPERTY(bool clipping READ hasClipping WRITE setClipping)

public:
    explicit QItemDelegate(QObject *parent = nullptr);
    ~QItemDelegate();

    bool hasClipping() const;
    void setClipping(bool clip);

    // painting
    void paint(QPainter *painter,
               const QStyleOptionViewItem &option,
               const QModelIndex &index) const override;
    QSize sizeHint(const QStyleOptionViewItem &option,
                   const QModelIndex &index) const override;

    // editing
    QWidget *createEditor(QWidget *parent,
                          const QStyleOptionViewItem &option,
                          const QModelIndex &index) const override;

    void setEditorData(QWidget *editor, const QModelIndex &index) const override;
    void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override;

    void updateEditorGeometry(QWidget *editor,
                              const QStyleOptionViewItem &option,
                              const QModelIndex &index) const override;

    // editor factory
    QItemEditorFactory *itemEditorFactory() const;
    void setItemEditorFactory(QItemEditorFactory *factory);

protected:
    virtual void drawDisplay(QPainter *painter, const QStyleOptionViewItem &option,
                             const QRect &rect, const QString &text) const;
    virtual void drawDecoration(QPainter *painter, const QStyleOptionViewItem &option,
                                const QRect &rect, const QPixmap &pixmap) const;
    virtual void drawFocus(QPainter *painter, const QStyleOptionViewItem &option,
                           const QRect &rect) const;
    virtual void drawCheck(QPainter *painter, const QStyleOptionViewItem &option,
                           const QRect &rect, Qt::CheckState state) const;
    void drawBackground(QPainter *painter, const QStyleOptionViewItem &option,
                        const QModelIndex &index) const;

    void doLayout(const QStyleOptionViewItem &option,
                  QRect *checkRect, QRect *iconRect, QRect *textRect, bool hint) const;

    QRect rect(const QStyleOptionViewItem &option, const QModelIndex &index, int role) const;

    bool eventFilter(QObject *object, QEvent *event) override;
    bool editorEvent(QEvent *event, QAbstractItemModel *model,
                     const QStyleOptionViewItem &option, const QModelIndex &index) override;

    QStyleOptionViewItem setOptions(const QModelIndex &index,
                                    const QStyleOptionViewItem &option) const;

    QPixmap decoration(const QStyleOptionViewItem &option, const QVariant &variant) const;

    static QPixmap selectedPixmap(const QPixmap &pixmap, const QPalette &palette, bool enabled);

    QRect doCheck(const QStyleOptionViewItem &option, const QRect &bounding,
                const QVariant &variant) const;
    QRect textRectangle(QPainter *painter, const QRect &rect,
                        const QFont &font, const QString &text) const;

private:
    Q_DECLARE_PRIVATE(QItemDelegate)
    Q_DISABLE_COPY(QItemDelegate)
};

QT_END_NAMESPACE

#endif // QITEMDELEGATE_H
