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Internal/Contributor docs for the Qt SDK. <b>Note:</b> These are NOT official API docs; those are found <a href='https://doc.qt.io/'>here</a>.
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androidbackendregister.h
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1// Copyright (C) 2024 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef ANDROIDBACKENDREGISTER_H
5#define ANDROIDBACKENDREGISTER_H
6
7#include <type_traits>
8
9#include <QtCore/qjnienvironment.h>
10#include <QtCore/qjnitypes.h>
11#include <QtCore/qjniobject.h>
12
13#include <QtCore/qstring.h>
14#include <QtCore/qmap.h>
15#include <QtCore/qmutex.h>
16#include <QtCore/qloggingcategory.h>
17
19
20Q_DECLARE_LOGGING_CATEGORY(lcAndroidBackendRegister)
21
22template <typename T>
23using ValidInterfaceType = std::enable_if_t<std::is_base_of_v<QtJniTypes::JObjectBase, T>, bool>;
24
26{
27public:
28 static bool registerNatives();
29
30 template <typename T, ValidInterfaceType<T> = true>
31 [[nodiscard]] T getInterface()
32 {
33 QMutexLocker lock(&m_registerMutex);
34 return m_register.value(QString(QtJniTypes::Traits<T>::className().data()));
35 }
36
37 template <typename Object>
39 typename std::disjunction<std::is_base_of<QJniObject, Object>,
40 std::is_base_of<QtJniTypes::JObjectBase, Object>>;
41
42 template <typename Interface, typename Ret, typename... Args,
43 ValidInterfaceType<Interface> = true>
44 auto callInterface(const char *func, Args... args)
45 {
46 if (const auto obj = getInterface<Interface>(); obj.isValid())
47 return obj.template callMethod<Ret, Args...>(func, std::forward<Args>(args)...);
48
49 if constexpr (IsObjectType<Ret>::value)
50 return Ret(QJniObject());
51 if constexpr (!std::is_same_v<Ret, void>)
52 return Ret{};
53 }
54
55private:
56 QMutex m_registerMutex;
57 QMap<QString, QJniObject> m_register;
58
59 static void registerBackend(JNIEnv *, jclass, jclass interfaceClass, jobject interface);
60 Q_DECLARE_JNI_NATIVE_METHOD_IN_CURRENT_SCOPE(registerBackend)
61 static void unregisterBackend(JNIEnv *, jclass, jclass interfaceClass);
62 Q_DECLARE_JNI_NATIVE_METHOD_IN_CURRENT_SCOPE(unregisterBackend)
63};
64
66
67#endif // ANDROIDBACKENDREGISTER_H
std::enable_if_t< std::is_base_of_v< QtJniTypes::JObjectBase, T >, bool > ValidInterfaceType
auto callInterface(const char *func, Args... args)
typename std::disjunction< std::is_base_of< QJniObject, Object >, std::is_base_of< QtJniTypes::JObjectBase, Object > > IsObjectType
\inmodule QtCore
T value(const Key &key, const T &defaultValue=T()) const
Definition qmap.h:358
\inmodule QtCore
Definition qmutex.h:313
\inmodule QtCore
Definition qmutex.h:281
\macro QT_RESTRICTED_CAST_FROM_ASCII
Definition qstring.h:129
Combined button and popup list for selecting options.
DBusConnection const char DBusError DBusBusType DBusError return DBusConnection DBusHandleMessageFunction void DBusFreeFunction return DBusConnection return DBusConnection return const char DBusError return DBusConnection DBusMessage dbus_uint32_t return DBusConnection dbus_bool_t DBusConnection DBusAddWatchFunction DBusRemoveWatchFunction DBusWatchToggledFunction void DBusFreeFunction return DBusConnection DBusDispatchStatusFunction void DBusFreeFunction DBusTimeout return DBusTimeout return DBusWatch return DBusWatch unsigned int return DBusError const DBusError return const DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessage return DBusMessageIter int const void return DBusMessageIter DBusMessageIter return DBusMessageIter void DBusMessageIter void int return DBusMessage DBusMessageIter return DBusMessageIter return DBusMessageIter DBusMessageIter const char const char const char * interface
#define Q_DECLARE_LOGGING_CATEGORY(name)
GLint GLsizei GLsizei GLenum GLenum GLsizei void * data
GLhandleARB obj
[2]
GLenum func
Definition qopenglext.h:663
QReadWriteLock lock
[0]
QJSValueList args