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
|
// Copyright (C) 2016 David Faure <faure@kde.org>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <qcommandlineparser.h>
int main(int argc, char **argv)
{
{
QCommandLineParser parser;
//! [0]
bool verbose = parser.isSet("verbose");
//! [0]
}
{
//! [1]
QCoreApplication app(argc, argv);
QCommandLineParser parser;
QCommandLineOption verboseOption("verbose");
parser.addOption(verboseOption);
parser.process(app);
bool verbose = parser.isSet(verboseOption);
//! [1]
}
{
QCommandLineParser parser;
//! [2]
// Usage: image-editor file
//
// Arguments:
// file The file to open.
parser.addPositionalArgument("file", QCoreApplication::translate("main", "The file to open."));
// Usage: web-browser [urls...]
//
// Arguments:
// urls URLs to open, optionally.
parser.addPositionalArgument("urls", QCoreApplication::translate("main", "URLs to open, optionally."), "[urls...]");
// Usage: cp source destination
//
// Arguments:
// source Source file to copy.
// destination Destination directory.
parser.addPositionalArgument("source", QCoreApplication::translate("main", "Source file to copy."));
parser.addPositionalArgument("destination", QCoreApplication::translate("main", "Destination directory."));
//! [2]
}
{
//! [3]
QCoreApplication app(argc, argv);
QCommandLineParser parser;
parser.addPositionalArgument("command", "The command to execute.");
// Call parse() to find out the positional arguments.
parser.parse(QCoreApplication::arguments());
const QStringList args = parser.positionalArguments();
const QString command = args.isEmpty() ? QString() : args.first();
if (command == "resize") {
parser.clearPositionalArguments();
parser.addPositionalArgument("resize", "Resize the object to a new size.", "resize [resize_options]");
parser.addOption(QCommandLineOption("size", "New size.", "new_size"));
parser.process(app);
// ...
}
/*
This code results in context-dependent help:
$ tool --help
Usage: tool command
Arguments:
command The command to execute.
$ tool resize --help
Usage: tool resize [resize_options]
Options:
--size <size> New size.
Arguments:
resize Resize the object to a new size.
*/
//! [3]
}
}
|
