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
|
//! [0]
QValidator *validator = new QIntValidator(100, 999, this);
QLineEdit *edit = new QLineEdit(this);
// the edit lineedit will only accept integers between 100 and 999
edit->setValidator(validator);
//! [0]
//! [1]
QString str;
int pos = 0;
QIntValidator v(100, 900, this);
str = "1";
v.validate(str, pos); // returns Intermediate
str = "012";
v.validate(str, pos); // returns Intermediate
str = "123";
v.validate(str, pos); // returns Acceptable
str = "678";
v.validate(str, pos); // returns Acceptable
str = "999";
v.validate(str, pos); // returns Intermediate
str = "1234";
v.validate(str, pos); // returns Invalid
str = "-123";
v.validate(str, pos); // returns Invalid
str = "abc";
v.validate(str, pos); // returns Invalid
str = "12cm";
v.validate(str, pos); // returns Invalid
//! [1]
//! [2]
int pos = 0;
s = "abc";
v.validate(s, pos); // returns Invalid
s = "5";
v.validate(s, pos); // returns Intermediate
s = "50";
v.validate(s, pos); // returns Acceptable
//! [2]
//! [3]
// regexp: optional '-' followed by between 1 and 3 digits
QRegExp rx("-?\\d{1,3}");
QValidator *validator = new QRegExpValidator(rx, this);
QLineEdit *edit = new QLineEdit(this);
edit->setValidator(validator);
//! [3]
//! [4]
// integers 1 to 9999
QRegExp rx("[1-9]\\d{0,3}");
// the validator treats the regexp as "^[1-9]\\d{0,3}$"
QRegExpValidator v(rx, 0);
QString s;
int pos = 0;
s = "0"; v.validate(s, pos); // returns Invalid
s = "12345"; v.validate(s, pos); // returns Invalid
s = "1"; v.validate(s, pos); // returns Acceptable
rx.setPattern("\\S+"); // one or more non-whitespace characters
v.setRegExp(rx);
s = "myfile.txt"; v.validate(s, pos); // Returns Acceptable
s = "my file.txt"; v.validate(s, pos); // Returns Invalid
// A, B or C followed by exactly five digits followed by W, X, Y or Z
rx.setPattern("[A-C]\\d{5}[W-Z]");
v.setRegExp(rx);
s = "a12345Z"; v.validate(s, pos); // Returns Invalid
s = "A12345Z"; v.validate(s, pos); // Returns Acceptable
s = "B12"; v.validate(s, pos); // Returns Intermediate
// match most 'readme' files
rx.setPattern("read\\S?me(\.(txt|asc|1st))?");
rx.setCaseSensitive(false);
v.setRegExp(rx);
s = "readme"; v.validate(s, pos); // Returns Acceptable
s = "README.1ST"; v.validate(s, pos); // Returns Acceptable
s = "read me.txt"; v.validate(s, pos); // Returns Invalid
s = "readm"; v.validate(s, pos); // Returns Intermediate
//! [4]
|
