# Gtk::FileFilter Class Reference

A filter for selecting a file subset. More...

Inherits Gtk::Object.

Collaboration diagram for Gtk::FileFilter:
[legend]

List of all members.

## Classes

class | Info

## Public Types

typedef sigc::slot< bool, const Info& > | SlotCustom
| For instance, bool on_custom(const Gtk::FileFilter::Info& filter_info);.

## Public Member Functions

virtual | ~FileFilter ()
GtkFileFilter* | gobj ()
| Provides access to the underlying C GtkObject.
const GtkFileFilter* | gobj () const
| Provides access to the underlying C GtkObject.
| FileFilter ()
void | set_name (const Glib::ustring& name)
| Sets the human-readable name of the filter; this is the string that will be displayed in the file selector user interface if there is a selectable list of filters.
Glib::ustring | get_name () const
| Gets the human-readable name for the filter.
void | add_mime_type (const Glib::ustring& mime_type)
| Adds a rule allowing a given mime type to filter.
void | add_pattern (const Glib::ustring& pattern)
| Adds a rule allowing a shell style glob to a filter.
void | add_pixbuf_formats ()
| Adds a rule allowing image files in the formats supported by GdkPixbuf.
void | add_custom (FileFilterFlags needed, const SlotCustom& slot)
FileFilterFlags | get_needed () const
| Gets the fields that need to be filled in for the structure passed to filter().

## Related Functions

(Note that these are not member functions.)
Gtk::FileFilter* | wrap (GtkFileFilter* object, bool take_copy=false)
| A Glib::wrap() method for this object.

## Detailed Description

A filter for selecting a file subset.

A Gtk::FileFilter can be used to restrict the files being shown in a Gtk::FileChooser. Files can be filtered based on their name (with add_pattern()), on their mime type (with add_mime_type()), or by a custom filter function (with add_custom()).

Filtering by mime types handles aliasing and subclassing of mime types; e.g. a filter for text/plain also matches a file with mime type application/rtf, since application/rtf is a subclass of text/plain. Note that Gtk::FileFilter allows wildcards for the subtype of a mime type, so you can e.g. filter for image/*.

Normally, filters are used by adding them to a Gtk::FileChooser. See Gtk::FileChooser::add_filter(). But it is also possible to manually use a filter on a file with filter().

## Member Typedef Documentation

typedef sigc::slot<bool, const Info&> Gtk::FileFilter::SlotCustom

For instance, bool on_custom(const Gtk::FileFilter::Info& filter_info);.

## Constructor & Destructor Documentation

virtual Gtk::FileFilter::~FileFilter | ( |  | ) | `[virtual]`

Gtk::FileFilter::FileFilter | ( |  | ) |

## Member Function Documentation

void Gtk::FileFilter::add_custom | ( | FileFilterFlags | needed,
|  | const SlotCustom& | slot |
| ) |  |  |

void Gtk::FileFilter::add_mime_type | ( | const Glib::ustring & | mime_type | ) |

Adds a rule allowing a given mime type to filter.

Since gtkmm 2.4:

Parameters:

  | mime_type | Name of a MIME type.

void Gtk::FileFilter::add_pattern | ( | const Glib::ustring & | pattern | ) |

Adds a rule allowing a shell style glob to a filter.

Since gtkmm 2.4:

Parameters:

  | pattern | A shell style glob.

void Gtk::FileFilter::add_pixbuf_formats | ( |  | ) |

Adds a rule allowing image files in the formats supported by GdkPixbuf.

Since gtkmm 2.6:

Glib::ustring Gtk::FileFilter::get_name | ( |  | ) | const

Gets the human-readable name for the filter.

See set_name().

Since gtkmm 2.4:

Returns:
  The human-readable name of the filter, or `0`. This value is owned by GTK+ and must not be modified or freed.

FileFilterFlags Gtk::FileFilter::get_needed | ( |  | ) | const

Gets the fields that need to be filled in for the structure passed to filter().

This function will not typically be used by applications; it is intended principally for use in the implementation of Gtk::FileChooser.

Since gtkmm 2.4:

Returns:
  Bitfield of flags indicating needed fields when calling filter().

const GtkFileFilter* Gtk::FileFilter::gobj | ( |  | ) | const`[inline]`

Provides access to the underlying C GtkObject.

Reimplemented from Gtk::Object.

GtkFileFilter* Gtk::FileFilter::gobj | ( |  | ) | `[inline]`

Provides access to the underlying C GtkObject.

Reimplemented from Gtk::Object.

void Gtk::FileFilter::set_name | ( | const Glib::ustring & | name | ) |

Sets the human-readable name of the filter; this is the string that will be displayed in the file selector user interface if there is a selectable list of filters.

Since gtkmm 2.4:

Parameters:

  | name | The human-readable-name for the filter, or `0` to remove any existing name.

## Friends And Related Function Documentation

Gtk::FileFilter* wrap | ( | GtkFileFilter * | object,
|  | bool | take_copy = `false` |
| ) |  |  | `[related]`

A Glib::wrap() method for this object.

Parameters:

  | object | The C instance.
  | take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns:
  A C++ instance that wraps this C instance.

The documentation for this class was generated from the following file:

- gtkmm/filefilter.h