blob: 783852bbb29182526a66916fd27586bb59790005 (
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
|
//! [0]
struct MyStruct
{
int i;
...
};
Q_DECLARE_METATYPE(MyStruct)
//! [0]
//! [1]
namespace MyNamespace
{
...
}
Q_DECLARE_METATYPE(MyNamespace::MyStruct)
//! [1]
//! [2]
MyStruct s;
QVariant var;
var.setValue(s); // copy s into the variant
...
// retrieve the value
MyStruct s2 = var.value<MyStruct>();
//! [2]
//! [3]
int id = QMetaType::type("MyClass");
if (id == 0) {
void *myClassPtr = QMetaType::construct(id);
...
QMetaType::destroy(id, myClassPtr);
myClassPtr = 0;
}
//! [3]
//! [4]
qRegisterMetaType<MyClass>("MyClass");
//! [4]
//! [5]
qRegisterMetaTypeStreamOperators<MyClass>("MyClass");
//! [5]
//! [6]
QDataStream &operator<<(QDataStream &out, const MyClass &myObj);
QDataStream &operator>>(QDataStream &in, MyClass &myObj);
//! [6]
//! [7]
int id = qRegisterMetaType<MyStruct>();
//! [7]
//! [8]
int id = qMetaTypeId<QString>(); // id is now QMetaType::QString
id = qMetaTypeId<MyStruct>(); // compile error if MyStruct not declared
//! [8]
|
