Glib::OptionGroup Class Reference

An OptionGroup defines the options in a single group. More...

`#include <glibmm/optiongroup.h>`

## Public Types

using | SlotTranslate = sigc::slot< Glib::ustring, const Glib::ustring& >
| For example Glib::ustring on_translate(const Glib::ustring& original);. More...
using | SlotOptionArgString = sigc::slot< bool, const Glib::ustring&, const Glib::ustring&, bool >
| For example bool on_option_arg_string(const Glib::ustring& option_name, const Glib::ustring& value, bool has_value);. More...
using | SlotOptionArgFilename = sigc::slot< bool, const Glib::ustring&, const std::string&, bool >
| For example bool on_option_arg_filename(const Glib::ustring& option_name, const std::string& value, bool has_value);. More...
using | vecustrings = std::vector< Glib::ustring >
using | vecstrings = std::vector< std::string >

## Public Member Functions

| OptionGroup (const Glib::ustring& name, const Glib::ustring& description, const Glib::ustring& help_description=Glib::ustring())
| OptionGroup (GOptionGroup* castitem)
| This always takes ownership of the underlying GOptionGroup, so it is only useful with C functions that return newly-allocated GOptionGroups. More...
| OptionGroup (OptionGroup&& other) noexcept
OptionGroup& | operator= (OptionGroup&& other) noexcept
virtual | ~OptionGroup ()
virtual bool | on_pre_parse (OptionContext& context, OptionGroup& group)
virtual bool | on_post_parse (OptionContext& context, OptionGroup& group)
virtual void | on_error (OptionContext& context, OptionGroup& group)
void | add_entry (const OptionEntry& entry)
void | add_entry (const OptionEntry& entry, bool&arg)
| Add a boolean option entry. More...
void | add_entry (const OptionEntry& entry, int&arg)
| Add an integer option entry. More...
void | add_entry (const OptionEntry& entry, double&arg)
| Add a double option entry. More...
void | add_entry (const OptionEntry& entry, Glib::ustring&arg)
| Add a UTF-8 string option entry. More...
void | add_entry_filename (const OptionEntry& entry, std::string&arg)
| Add a filename string option entry. More...
void | add_entry (const OptionEntry& entry, vecustrings&arg)
| Add an option entry that provides a list of UTF-8 strings. More...
void | add_entry_filename (const OptionEntry& entry, vecstrings&arg)
| Add an option entry that provides a list of filename strings. More...
void | add_entry (const OptionEntry& entry, const SlotOptionArgString& slot)
| Add a string option entry, but let a callback slot parse the extra argument instead of just setting a variable to its value. More...
void | add_entry_filename (const OptionEntry& entry, const SlotOptionArgFilename& slot)
| Add a filename option entry, but let a callback slot parse the extra argument instead of just setting a variable to its value. More...
void | set_translate_func (const SlotTranslate& slot)
| Sets the function which is used to translate user-visible strings, for –help output. More...
void | set_translation_domain (const Glib::ustring& domain)
| A convenience function to use gettext() for translating user-visible strings. More...
GOptionGroup* | gobj ()
const GOptionGroup* | gobj () const
GOptionGroup* | gobj_give_ownership ()

## Detailed Description

An OptionGroup defines the options in a single group.

Libraries which need to parse commandline options are expected to provide a function that allows their OptionGroups to be added to the application's OptionContext.

## Member Typedef Documentation

## SlotOptionArgFilename

using Glib::OptionGroup::SlotOptionArgFilename = sigc::slot<bool, const Glib::ustring&, const std::string&, bool>

For example bool on_option_arg_filename(const Glib::ustring& option_name, const std::string& value, bool has_value);.

## SlotOptionArgString

using Glib::OptionGroup::SlotOptionArgString = sigc::slot<bool, const Glib::ustring&, const Glib::ustring&, bool>

For example bool on_option_arg_string(const Glib::ustring& option_name, const Glib::ustring& value, bool has_value);.

## SlotTranslate

using Glib::OptionGroup::SlotTranslate = sigc::slot<Glib::ustring, const Glib::ustring&>

For example Glib::ustring on_translate(const Glib::ustring& original);.

## vecstrings

using Glib::OptionGroup::vecstrings = std::vector<std::string>

## vecustrings

using Glib::OptionGroup::vecustrings = std::vector<Glib::ustring>

## Constructor & Destructor Documentation

## OptionGroup() [1/3]

Glib::OptionGroup::OptionGroup | ( | const Glib::ustring& | name,
|  | const Glib::ustring& | description,
|  | const Glib::ustring& | help_description = `Glib::ustring()`
| ) |  |

## OptionGroup() [2/3]

Glib::OptionGroup::OptionGroup | ( | GOptionGroup * | castitem | ) |

explicit

This always takes ownership of the underlying GOptionGroup, so it is only useful with C functions that return newly-allocated GOptionGroups.

## OptionGroup() [3/3]

Glib::OptionGroup::OptionGroup | ( | OptionGroup&& | other | ) |

noexcept

## ~OptionGroup()

virtual Glib::OptionGroup::~OptionGroup | ( |  | ) |

virtual

## Member Function Documentation

## add_entry() [1/7]

void Glib::OptionGroup::add_entry | ( | const OptionEntry& | entry | ) |

## add_entry() [2/7]

void Glib::OptionGroup::add_entry | ( | const OptionEntry& | entry,
|  | bool & | arg
| ) |  |

Add a boolean option entry.

If the option exists among the parsed arguments, the arg parameter will be set to `true` or, if entry contains OptionEntry::FLAG_REVERSE, to `false` after OptionContext::parse() has returned.

## add_entry() [3/7]

void Glib::OptionGroup::add_entry | ( | const OptionEntry& | entry,
|  | int & | arg
| ) |  |

Add an integer option entry.

The arg parameter will be set to the option's extra argument after OptionContext::parse() has returned.

## add_entry() [4/7]

void Glib::OptionGroup::add_entry | ( | const OptionEntry& | entry,
|  | double & | arg
| ) |  |

Add a double option entry.

The arg parameter will be set to the option's extra argument after OptionContext::parse() has returned.

## add_entry() [5/7]

void Glib::OptionGroup::add_entry | ( | const OptionEntry& | entry,
|  | Glib::ustring& | arg
| ) |  |

Add a UTF-8 string option entry.

The arg parameter will be set to the option's extra argument after OptionContext::parse() has returned.

As indicated by the Glib::ustring type, the string will be UTF-8 encoded.

## add_entry() [6/7]

void Glib::OptionGroup::add_entry | ( | const OptionEntry& | entry,
|  | vecustrings& | arg
| ) |  |

Add an option entry that provides a list of UTF-8 strings.

The arg parameter will be set to the option's extra argument after OptionContext::parse() has returned.

As indicated by the Glib::ustring type, the strings will be UTF-8 encoded.

## add_entry() [7/7]

void Glib::OptionGroup::add_entry | ( | const OptionEntry& | entry,
|  | const SlotOptionArgString& | slot
| ) |  |

Add a string option entry, but let a callback slot parse the extra argument instead of just setting a variable to its value.

## add_entry_filename() [1/3]

void Glib::OptionGroup::add_entry_filename | ( | const OptionEntry& | entry,
|  | std::string & | arg
| ) |  |

Add a filename string option entry.

The arg parameter will be set to the option's extra argument after OptionContext::parse() has returned.

The string will be in glib's filename encoding.

## add_entry_filename() [2/3]

void Glib::OptionGroup::add_entry_filename | ( | const OptionEntry& | entry,
|  | vecstrings& | arg
| ) |  |

Add an option entry that provides a list of filename strings.

The arg parameter will be set to the option's extra argument after OptionContext::parse() has returned.

The strings will be in glib's filename encoding.

## add_entry_filename() [3/3]

void Glib::OptionGroup::add_entry_filename | ( | const OptionEntry& | entry,
|  | const SlotOptionArgFilename& | slot
| ) |  |

Add a filename option entry, but let a callback slot parse the extra argument instead of just setting a variable to its value.

## gobj() [1/2]

GOptionGroup* Glib::OptionGroup::gobj | ( |  | ) |

inline

## gobj() [2/2]

const GOptionGroup* Glib::OptionGroup::gobj | ( |  | ) | const

inline

## gobj_give_ownership()

GOptionGroup* Glib::OptionGroup::gobj_give_ownership | ( |  | ) |

## on_error()

virtual void Glib::OptionGroup::on_error | ( | OptionContext& | context,
|  | OptionGroup& | group
| ) |  |

virtual

## on_post_parse()

virtual bool Glib::OptionGroup::on_post_parse | ( | OptionContext& | context,
|  | OptionGroup& | group
| ) |  |

virtual

## on_pre_parse()

virtual bool Glib::OptionGroup::on_pre_parse | ( | OptionContext& | context,
|  | OptionGroup& | group
| ) |  |

virtual

## operator=()

OptionGroup& Glib::OptionGroup::operator= | ( | OptionGroup&& | other | ) |

noexcept

## set_translate_func()

void Glib::OptionGroup::set_translate_func | ( | const SlotTranslate& | slot | ) |

Sets the function which is used to translate user-visible strings, for –help output.

Different groups can use a different SlotTranslate. If a translate function is not set, strings are not translated.

If you are using gettext(), you only need to set the translation domain, see set_translation_domain().

Parameters

  slot | the slot to be used for translation.

Since glibmm 2.28:

## set_translation_domain()

void Glib::OptionGroup::set_translation_domain | ( | const Glib::ustring& | domain | ) |

A convenience function to use gettext() for translating user-visible strings.

Since glibmm 2.6:

Parameters

  domain | The domain to use.