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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#ifndef QMLUSING_H
#define QMLUSING_H
#include <QtQml/qqml.h>
#include <QtCore/qendian.h>
#include <QtCore/qobject.h>
template<typename T, typename tag>
struct TransparentWrapper
{
TransparentWrapper(T t_ = T()) : t(t_) {
static const bool registered = []() {
if (!QMetaType::registerConverter<TransparentWrapper, T>(toType)
|| !QMetaType::registerConverter<T, TransparentWrapper>(fromType)) {
return false;
}
// We always want int and double in addition because the engine uses those
if (!QMetaType::registerConverter<TransparentWrapper, double>(toType)
|| !QMetaType::registerConverter<double, TransparentWrapper>(fromType)) {
return false;
}
if constexpr (!std::is_same_v<T, int>) {
if (!QMetaType::registerConverter<TransparentWrapper, int>(toType)
|| !QMetaType::registerConverter<int, TransparentWrapper>(fromType)) {
return false;
}
}
return true;
}();
Q_ASSERT(registered);
}
static T toType(TransparentWrapper t) { return t.t; }
static TransparentWrapper fromType(T t) { return TransparentWrapper(t); }
T t;
operator T &() { return t; }
operator T() const { return t; }
TransparentWrapper &operator=(T t_)
{
t = t_;
return *this;
}
};
using myInt32 = TransparentWrapper<int32_t, struct int_tag>;
struct MyInt32Foreign
{
Q_GADGET
QML_FOREIGN(myInt32)
QML_USING(int32_t)
};
using myUInt32 = TransparentWrapper<uint32_t, struct int_tag>;
struct MyUInt32Foreign
{
Q_GADGET
QML_FOREIGN(myUInt32)
QML_USING(uint32_t)
};
class UsingUserValue
{
Q_GADGET
QML_VALUE_TYPE(usingUserValue)
Q_PROPERTY(myInt32 a READ a WRITE setA)
Q_PROPERTY(myUInt32 u READ u WRITE setU)
public:
myInt32 a() const { return m_a; }
void setA(myInt32 a) { m_a = a; }
myUInt32 u() const { return m_u; }
void setU(myUInt32 u) { m_u = u; }
Q_INVOKABLE myInt32 getB() const { return m_b; }
Q_INVOKABLE void setB(myInt32 b) { m_b = b; }
Q_INVOKABLE void setB(const QString &) { m_b = 99; }
private:
friend bool operator==(const UsingUserValue &lhs, const UsingUserValue &rhs)
{
return lhs.m_a == rhs.m_a && lhs.m_b == rhs.m_b && lhs.m_u == rhs.m_u;
}
friend bool operator!=(const UsingUserValue &lhs, const UsingUserValue &rhs)
{
return !(lhs == rhs);
}
myInt32 m_a = 24;
myInt32 m_b = 25;
myUInt32 m_u = 26;
};
class UsingUserObject : public QObject
{
Q_OBJECT
QML_ELEMENT
Q_PROPERTY(myInt32 a READ a WRITE setA NOTIFY aChanged)
Q_PROPERTY(myUInt32 u READ u WRITE setU NOTIFY uChanged)
Q_PROPERTY(UsingUserValue val READ val WRITE setVal NOTIFY valChanged)
public:
UsingUserObject(QObject *parent = nullptr) : QObject(parent) {}
myInt32 a() const { return m_a; }
void setA(myInt32 a)
{
if (a == m_a)
return;
m_a = a;
emit aChanged();
}
myUInt32 u() const { return m_u; }
void setU(myUInt32 u)
{
if (u == m_u)
return;
m_u = u;
emit uChanged();
}
UsingUserValue val() const { return m_val; }
void setVal(const UsingUserValue &val)
{
++m_setValCalls;
if (val == m_val)
return;
m_val = val;
emit valChanged();
}
Q_INVOKABLE myInt32 getB() const { return m_b; }
Q_INVOKABLE void setB(myInt32 b) { m_b = b; }
Q_INVOKABLE void setB(const QString &) { m_b = 101; }
int setValCalls() const { return m_setValCalls; }
signals:
void aChanged();
void uChanged();
void valChanged();
private:
int m_setValCalls = 0;
myInt32 m_a = 7;
myInt32 m_b = 5;
myUInt32 m_u = 9;
UsingUserValue m_val;
};
#endif // QMLUSING_H
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