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
|
// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2019 Luxoft Sweden AB
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QIFREMOTEOBJECTSSOURCEHELPER_P_H
#define QIFREMOTEOBJECTSSOURCEHELPER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/QObject>
#include <QtInterfaceFramework/QIfPendingReply>
#include "qtifremoteobjectshelper_global.h"
#include "qifremoteobjectspendingresult_p.h"
QT_BEGIN_NAMESPACE
template <class T> class QIfRemoteObjectsSourceHelper
{
public:
QIfRemoteObjectsSourceHelper(T *adapter, const QLoggingCategory &category = qtif_private::qLcQtIfRoHelper())
: m_adapter(adapter)
, m_replyCounter(0)
, m_category(category)
{
qRegisterMetaType<QIfRemoteObjectsPendingResult>();
}
QVariant toRemoteObjectVariant(const QVariant &variant) const
{
// QtRemoteObjects always uses QVariant::data() and passes it directly to qt_metacall. This doesn't
// work for methods/signals which take a QVariant.
// The workaround is put the QVariant in a QVariant as a container.
// QTBUG-75056
return QVariant(QMetaType(QMetaType::QVariant), &variant);
}
QVariant fromPendingReply(const QIfPendingReplyBase &pendingReply)
{
if (pendingReply.isSuccessful()) {
qCDebug(m_category) << "Returning result right away";
return pendingReply.value();
} else { //reply not yet ready or failed
const quint64 id = ++m_replyCounter;
if (pendingReply.isResultAvailable()) { // the call failed
qCDebug(m_category) << "Returning failed reply";
return QVariant::fromValue(QIfRemoteObjectsPendingResult(id, true /* failed */));
}
QIfRemoteObjectsPendingResult result = QIfRemoteObjectsPendingResult(id, false /* failed */);
qCDebug(m_category) << "Returning a pending result: id:" << id;
QObject::connect(pendingReply.watcher(), &QIfPendingReplyWatcher::valueChanged, [this, pendingReply, id] (const QVariant &value) {
qCDebug(m_category) << "Value for pending result available: id:" << id << "value:" << value;
Q_EMIT m_adapter->pendingResultAvailable(id, pendingReply.isSuccessful(), value);
});
return QVariant::fromValue(result);
}
}
private:
T *m_adapter;
quint64 m_replyCounter;
const QLoggingCategory &m_category;
};
QT_END_NAMESPACE
#endif //QIFREMOTEOBJECTSSOURCEHELPER_P_H
|
