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50
51#include "imagemodel.h"
52
53//! [0]
54ImageModel::ImageModel(QObject *parent)
55 : QAbstractTableModel(parent)
56{
57}
58//! [0]
59
60//! [1]
61void ImageModel::setImage(const QImage &image)
62{
63 beginResetModel();
64 modelImage = image;
65 endResetModel();
66}
67//! [1]
68
69//! [2]
70int ImageModel::rowCount(const QModelIndex & /* parent */) const
71{
72 return modelImage.height();
73}
74
75int ImageModel::columnCount(const QModelIndex & /* parent */) const
76//! [2] //! [3]
77{
78 return modelImage.width();
79}
80//! [3]
81
82//! [4]
83QVariant ImageModel::data(const QModelIndex &index, int role) const
84{
85 if (!index.isValid() || role != Qt::DisplayRole)
86 return QVariant();
87 return qGray(rgb: modelImage.pixel(x: index.column(), y: index.row()));
88}
89//! [4]
90
91//! [5]
92QVariant ImageModel::headerData(int /* section */,
93 Qt::Orientation /* orientation */,
94 int role) const
95{
96 if (role == Qt::SizeHintRole)
97 return QSize(1, 1);
98 return QVariant();
99}
100//! [5]
101

source code of qtbase/examples/widgets/itemviews/pixelator/imagemodel.cpp