blob: d8358b6a9ca0564b5e53b136447eec97629b736e (
plain)
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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#ifndef DYNAMICMETA_H
#define DYNAMICMETA_H
#include <private/qobject_p.h>
#include <private/qmetaobjectbuilder_p.h>
#include <QtQmlIntegration/qqmlintegration.h>
template<typename T>
class MetaObjectData : public QDynamicMetaObjectData
{
Q_DISABLE_COPY_MOVE(MetaObjectData)
public:
MetaObjectData()
{
QMetaObjectBuilder builder;
builder.setSuperClass(&T::staticMetaObject);
builder.setFlags(builder.flags() | DynamicMetaObject);
metaObject = builder.toMetaObject();
};
~MetaObjectData() {
free(metaObject);
};
QMetaObject *toDynamicMetaObject(QObject *) override
{
return metaObject;
}
int metaCall(QObject *o, QMetaObject::Call call, int idx, void **argv) override
{
return o->qt_metacall(call, idx, argv);
}
QMetaObject *metaObject = nullptr;
};
class DynamicMeta : public QObject
{
Q_OBJECT
Q_PROPERTY(int foo READ foo WRITE setFoo NOTIFY fooChanged FINAL)
Q_PROPERTY(qreal value READ value WRITE setValue RESET resetValue NOTIFY valueChanged FINAL)
Q_PROPERTY(qreal shadowable READ shadowable CONSTANT)
QML_ELEMENT
public:
DynamicMeta(QObject *parent = nullptr)
: QObject(parent)
{
// deletes itself
QObjectPrivate::get(this)->metaObject = new MetaObjectData<DynamicMeta>;
}
int foo() const { return m_foo; }
void setFoo(int newFoo)
{
if (m_foo != newFoo) {
m_foo = newFoo;
emit fooChanged();
}
}
Q_INVOKABLE int bar(int baz) { return baz + 12; }
qreal value() const { return m_value; }
qreal shadowable() const { return 25; }
public slots:
void resetValue() { setValue(0); }
void setValue(qreal value)
{
if (m_value == value)
return;
m_value = value;
emit valueChanged();
}
Q_SIGNALS:
void fooChanged();
void valueChanged();
private:
int m_foo = 0;
qreal m_value = 0;
};
class DynamicMetaSingleton : public DynamicMeta
{
Q_OBJECT
QML_ELEMENT
QML_SINGLETON
Q_PROPERTY(DynamicMetaSingleton *itself READ itself CONSTANT FINAL)
public:
DynamicMetaSingleton(QObject *parent = nullptr) : DynamicMeta(parent)
{
QObjectPrivate *d = QObjectPrivate::get(this);
delete d->metaObject;
d->metaObject = new MetaObjectData<DynamicMetaSingleton>;
}
DynamicMetaSingleton *itself() { return this; }
};
#endif // DYNAMICMETA_H
|