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39
40#ifndef QABSTRACTITEMDELEGATE_H
41#define QABSTRACTITEMDELEGATE_H
42
43#include <QtWidgets/qtwidgetsglobal.h>
44#include <QtCore/qobject.h>
45#include <QtWidgets/qstyleoption.h>
46
47QT_REQUIRE_CONFIG(itemviews);
48
49QT_BEGIN_NAMESPACE
50
51class QPainter;
52class QModelIndex;
53class QAbstractItemModel;
54class QAbstractItemView;
55class QHelpEvent;
56class QAbstractItemDelegatePrivate;
57
58class Q_WIDGETS_EXPORT QAbstractItemDelegate : public QObject
59{
60 Q_OBJECT
61
62public:
63
64 enum EndEditHint {
65 NoHint,
66 EditNextItem,
67 EditPreviousItem,
68 SubmitModelCache,
69 RevertModelCache
70 };
71
72 explicit QAbstractItemDelegate(QObject *parent = nullptr);
73 virtual ~QAbstractItemDelegate();
74
75 // painting
76 virtual void paint(QPainter *painter,
77 const QStyleOptionViewItem &option,
78 const QModelIndex &index) const = 0;
79
80 virtual QSize sizeHint(const QStyleOptionViewItem &option,
81 const QModelIndex &index) const = 0;
82
83 // editing
84 virtual QWidget *createEditor(QWidget *parent,
85 const QStyleOptionViewItem &option,
86 const QModelIndex &index) const;
87
88 virtual void destroyEditor(QWidget *editor, const QModelIndex &index) const;
89
90 virtual void setEditorData(QWidget *editor, const QModelIndex &index) const;
91
92 virtual void setModelData(QWidget *editor,
93 QAbstractItemModel *model,
94 const QModelIndex &index) const;
95
96 virtual void updateEditorGeometry(QWidget *editor,
97 const QStyleOptionViewItem &option,
98 const QModelIndex &index) const;
99
100 // for non-widget editors
101 virtual bool editorEvent(QEvent *event,
102 QAbstractItemModel *model,
103 const QStyleOptionViewItem &option,
104 const QModelIndex &index);
105
106#if QT_DEPRECATED_SINCE(5, 13)
107 QT_DEPRECATED_X("Use QFontMetrics::elidedText() instead")
108 static QString elidedText(const QFontMetrics &fontMetrics, int width,
109 Qt::TextElideMode mode, const QString &text);
110#endif
111
112 virtual bool helpEvent(QHelpEvent *event,
113 QAbstractItemView *view,
114 const QStyleOptionViewItem &option,
115 const QModelIndex &index);
116
117 virtual QVector<int> paintingRoles() const;
118
119Q_SIGNALS:
120 void commitData(QWidget *editor);
121 void closeEditor(QWidget *editor, QAbstractItemDelegate::EndEditHint hint = NoHint);
122 void sizeHintChanged(const QModelIndex &);
123
124protected:
125 QAbstractItemDelegate(QObjectPrivate &, QObject *parent = nullptr);
126private:
127 Q_DECLARE_PRIVATE(QAbstractItemDelegate)
128 Q_DISABLE_COPY(QAbstractItemDelegate)
129 Q_PRIVATE_SLOT(d_func(), void _q_commitDataAndCloseEditor(QWidget*))
130};
131
132QT_END_NAMESPACE
133
134#endif // QABSTRACTITEMDELEGATE_H
135

source code of qtbase/src/widgets/itemviews/qabstractitemdelegate.h