Struct gtk4::FileFilter

source ·
#[repr(transparent)]
pub struct FileFilter { /* private fields */ }
Expand description

FileFilter filters files by name or mime type.

FileFilter can be used to restrict the files being shown in a FileChooser. Files can be filtered based on their name (with add_pattern() or add_suffix()) or on their mime type (with add_mime_type()).

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 FileFilter allows wildcards for the subtype of a mime type, so you can e.g. filter for image/*.

Normally, file filters are used by adding them to a FileChooser (see FileChooserExt::add_filter()), but it is also possible to manually use a file filter on any FilterListModel containing GFileInfo objects.

GtkFileFilter as GtkBuildable

The FileFilter implementation of the Buildable interface supports adding rules using the <mime-types> and <patterns> and <suffixes> elements and listing the rules within. Specifying a <mime-type> or <pattern> or <suffix> has the same effect as as calling add_mime_type() or add_pattern() or add_suffix().

An example of a UI definition fragment specifying FileFilter rules:

<object class="GtkFileFilter">
  <property name="name" translatable="yes">Text and Images</property>
  <mime-types>
    <mime-type>text/plain</mime-type>
    <mime-type>image/ *</mime-type>
  </mime-types>
  <patterns>
    <pattern>*.txt</pattern>
  </patterns>
  <suffixes>
    <suffix>png</suffix>
  </suffixes>
</object>

Implements

FilterExt, glib::ObjectExt, BuildableExt

Implementations

Creates a new FileFilter with no rules added to it.

Such a filter doesn’t accept any files, so is not particularly useful until you add rules with add_mime_type(), add_pattern(), add_suffix() or add_pixbuf_formats().

To create a filter that accepts any file, use: ⚠️ The following code is in c ⚠️

GtkFileFilter *filter = gtk_file_filter_new ();
gtk_file_filter_add_pattern (filter, "*");
Returns

a new FileFilter

Deserialize a file filter from a GVariant.

The variant must be in the format produced by to_gvariant().

variant

an a{sv} GVariant

Returns

a new FileFilter object

Adds a rule allowing a given mime type to @self.

mime_type

name of a MIME type

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

Note that it depends on the platform whether pattern matching ignores case or not. On Windows, it does, on other platforms, it doesn’t.

pattern

a shell style glob

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

This is equivalent to calling add_mime_type() for all the supported mime types.

Available on crate feature v4_4 only.

Adds a suffix match rule to a filter.

This is similar to adding a match for the pattern “*.@suffix”.

In contrast to pattern matches, suffix matches are always case-insensitive.

suffix

filename suffix to match

Gets the attributes that need to be filled in for the GFileInfo passed to this filter.

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

Returns

the attributes

Gets the human-readable name for the filter.

See set_name().

Returns

The human-readable name of the filter

Sets a human-readable name of the filter.

This is the string that will be displayed in the file chooser if there is a selectable list of filters.

name

the human-readable-name for the filter, or None to remove any existing name.

Serialize a file filter to an a{sv} variant.

Returns

a new, floating, GVariant

Trait Implementations

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