QAbstractItemDelegate

Header: #include
qmake: QT += widgets Inherits: QObject Inherited By: QItemDelegate and QStyledItemDelegate

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
#ifndef QABSTRACTITEMDELEGATE_H
#define QABSTRACTITEMDELEGATE_H

#include <QtWidgets/qtwidgetsglobal.h>
#include <QtCore/qobject.h>
#include <QtWidgets/qstyleoption.h>

QT_REQUIRE_CONFIG(itemviews);

QT_BEGIN_NAMESPACE

class QPainter;
class QModelIndex;
class QAbstractItemModel;
class QAbstractItemView;
class QHelpEvent;
class QAbstractItemDelegatePrivate;

class Q_WIDGETS_EXPORT QAbstractItemDelegate : public QObject
{
    Q_OBJECT

public:

    enum EndEditHint {
        NoHint,
        EditNextItem,
        EditPreviousItem,
        SubmitModelCache,
        RevertModelCache
    };

    explicit QAbstractItemDelegate(QObject *parent = nullptr);
    virtual ~QAbstractItemDelegate();

    // painting
    virtual void paint(QPainter *painter,
                       const QStyleOptionViewItem &option,
                       const QModelIndex &index) const = 0;

    virtual QSize sizeHint(const QStyleOptionViewItem &option,
                           const QModelIndex &index) const = 0;

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

    virtual void destroyEditor(QWidget *editor, const QModelIndex &index) const;

    virtual void setEditorData(QWidget *editor, const QModelIndex &index) const;

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

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

    // for non-widget editors
    virtual bool editorEvent(QEvent *event,
                             QAbstractItemModel *model,
                             const QStyleOptionViewItem &option,
                             const QModelIndex &index);

#if QT_DEPRECATED_SINCE(5, 13)
    QT_DEPRECATED_X("Use QFontMetrics::elidedText() instead")
    static QString elidedText(const QFontMetrics &fontMetrics, int width,
                              Qt::TextElideMode mode, const QString &text);
#endif

    virtual bool helpEvent(QHelpEvent *event,
                           QAbstractItemView *view,
                           const QStyleOptionViewItem &option,
                           const QModelIndex &index);

    virtual QVector<int> paintingRoles() const;

Q_SIGNALS:
    void commitData(QWidget *editor);
    void closeEditor(QWidget *editor, QAbstractItemDelegate::EndEditHint hint = NoHint);
    void sizeHintChanged(const QModelIndex &);

protected:
    QAbstractItemDelegate(QObjectPrivate &, QObject *parent = nullptr);
private:
    Q_DECLARE_PRIVATE(QAbstractItemDelegate)
    Q_DISABLE_COPY(QAbstractItemDelegate)
    Q_PRIVATE_SLOT(d_func(), void _q_commitDataAndCloseEditor(QWidget*))
};

QT_END_NAMESPACE

#endif // QABSTRACTITEMDELEGATE_H