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50
51#include <QtWidgets>
52
53#include "stardelegate.h"
54#include "stareditor.h"
55#include "starrating.h"
56
57//! [0]
58void StarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
59 const QModelIndex &index) const
60{
61 if (index.data().canConvert<StarRating>()) {
62 StarRating starRating = qvariant_cast<StarRating>(v: index.data());
63
64 if (option.state & QStyle::State_Selected)
65 painter->fillRect(option.rect, option.palette.highlight());
66
67 starRating.paint(painter, rect: option.rect, palette: option.palette,
68 mode: StarRating::EditMode::ReadOnly);
69 } else {
70 QStyledItemDelegate::paint(painter, option, index);
71 }
72//! [0]
73}
74
75//! [1]
76QSize StarDelegate::sizeHint(const QStyleOptionViewItem &option,
77 const QModelIndex &index) const
78{
79 if (index.data().canConvert<StarRating>()) {
80 StarRating starRating = qvariant_cast<StarRating>(v: index.data());
81 return starRating.sizeHint();
82 }
83 return QStyledItemDelegate::sizeHint(option, index);
84}
85//! [1]
86
87//! [2]
88QWidget *StarDelegate::createEditor(QWidget *parent,
89 const QStyleOptionViewItem &option,
90 const QModelIndex &index) const
91
92{
93 if (index.data().canConvert<StarRating>()) {
94 StarEditor *editor = new StarEditor(parent);
95 connect(sender: editor, signal: &StarEditor::editingFinished,
96 receiver: this, slot: &StarDelegate::commitAndCloseEditor);
97 return editor;
98 }
99 return QStyledItemDelegate::createEditor(parent, option, index);
100}
101//! [2]
102
103//! [3]
104void StarDelegate::setEditorData(QWidget *editor,
105 const QModelIndex &index) const
106{
107 if (index.data().canConvert<StarRating>()) {
108 StarRating starRating = qvariant_cast<StarRating>(v: index.data());
109 StarEditor *starEditor = qobject_cast<StarEditor *>(object: editor);
110 starEditor->setStarRating(starRating);
111 } else {
112 QStyledItemDelegate::setEditorData(editor, index);
113 }
114}
115//! [3]
116
117//! [4]
118void StarDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
119 const QModelIndex &index) const
120{
121 if (index.data().canConvert<StarRating>()) {
122 StarEditor *starEditor = qobject_cast<StarEditor *>(object: editor);
123 model->setData(index, value: QVariant::fromValue(value: starEditor->starRating()));
124 } else {
125 QStyledItemDelegate::setModelData(editor, model, index);
126 }
127}
128//! [4]
129
130//! [5]
131void StarDelegate::commitAndCloseEditor()
132{
133 StarEditor *editor = qobject_cast<StarEditor *>(object: sender());
134 emit commitData(editor);
135 emit closeEditor(editor);
136}
137//! [5]
138

source code of qtbase/examples/widgets/itemviews/stardelegate/stardelegate.cpp