52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
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#include "incrementalmodel.h"
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#include <QGuiApplication>
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#include <QDebug>
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IncrementalModel::IncrementalModel(QObject *parent)
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: QAbstractListModel(parent), count(0)
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{
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for (int i = 0; i < 100; ++i)
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list.append("Item " + QString::number(i));
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}
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int IncrementalModel::rowCount(const QModelIndex & /* parent */) const
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{
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return count;
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}
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QVariant IncrementalModel::data(const QModelIndex &index, int role) const
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{
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if (!index.isValid())
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return QVariant();
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if (index.row() >= list.size() || index.row() < 0)
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return QVariant();
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if (role == Qt::DisplayRole)
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return list.at(index.row());
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return QVariant();
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}
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bool IncrementalModel::canFetchMore(const QModelIndex & /* index */) const
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{
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if (count < list.size())
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return true;
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else
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return false;
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}
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void IncrementalModel::fetchMore(const QModelIndex & /* index */)
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{
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int remainder = list.size() - count;
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int itemsToFetch = qMin(5, remainder);
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beginInsertRows(QModelIndex(), count, count+itemsToFetch-1);
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count += itemsToFetch;
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endInsertRows();
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}
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