## GtkFontChooser

GtkFontChooser — Interface implemented by widgets displaying fonts

## Synopsis

    #include <gtk/gtk.h>

                        GtkFontChooser;
    PangoFontFamily *   gtk_font_chooser_get_font_family    (GtkFontChooser *fontchooser);
    PangoFontFace *     gtk_font_chooser_get_font_face      (GtkFontChooser *fontchooser);
    gint                gtk_font_chooser_get_font_size      (GtkFontChooser *fontchooser);
    gchar *             gtk_font_chooser_get_font           (GtkFontChooser *fontchooser);
    void                gtk_font_chooser_set_font           (GtkFontChooser *fontchooser,
                                                             const gchar *fontname);
    PangoFontDescription * gtk_font_chooser_get_font_desc   (GtkFontChooser *fontchooser);
    void                gtk_font_chooser_set_font_desc      (GtkFontChooser *fontchooser,
                                                             const PangoFontDescription *font_desc);
    gchar *             gtk_font_chooser_get_preview_text   (GtkFontChooser *fontchooser);
    void                gtk_font_chooser_set_preview_text   (GtkFontChooser *fontchooser,
                                                             const gchar *text);
    gboolean            gtk_font_chooser_get_show_preview_entry
                                                            (GtkFontChooser *fontchooser);
    void                gtk_font_chooser_set_show_preview_entry
                                                            (GtkFontChooser *fontchooser,
                                                             gboolean show_preview_entry);
    gboolean            (*GtkFontFilterFunc)                (const PangoFontFamily *family,
                                                             const PangoFontFace *face,
                                                             gpointer data);
    void                gtk_font_chooser_set_filter_func    (GtkFontChooser *fontchooser,
                                                             GtkFontFilterFunc filter,
                                                             gpointer user_data,
                                                             GDestroyNotify destroy);

## Object Hierarchy

      GInterface
       +----GtkFontChooser

## Prerequisites

GtkFontChooser requires GObject.

## Known Implementations

GtkFontChooser is implemented by GtkFontButton, GtkFontChooserDialog and GtkFontChooserWidget.

## Properties

      "font"                     gchar*                : Read / Write
      "font-desc"                PangoFontDescription*  : Read / Write
      "preview-text"             gchar*                : Read / Write
      "show-preview-entry"       gboolean              : Read / Write

## Signals

      "font-activated"                                 : Run First

## Description

GtkFontChooser is an interface that can be implemented by widgets displaying the list of fonts. In GTK+, the main objects that implement this interface are GtkFontChooserWidget, GtkFontChooserDialog and GtkFontButton.

## Details

### GtkFontChooser

    typedef struct _GtkFontChooser GtkFontChooser;

### gtk_font_chooser_get_font_family ()

    PangoFontFamily *   gtk_font_chooser_get_font_family    (GtkFontChooser *fontchooser);

Gets the PangoFontFamily representing the selected font family. Font families are a collection of font faces.

If the selected font is not installed, returns `NULL`.

`fontchooser` : | a GtkFontChooser
Returns : | A PangoFontFamily representing the selected font family, or `NULL`. The returned object is owned by `fontchooser` and must not be modified or freed. [transfer none]

Since 3.2

### gtk_font_chooser_get_font_face ()

    PangoFontFace *     gtk_font_chooser_get_font_face      (GtkFontChooser *fontchooser);

Gets the PangoFontFace representing the selected font group details (i.e. family, slant, weight, width, etc).

If the selected font is not installed, returns `NULL`.

`fontchooser` : | a GtkFontChooser
Returns : | A PangoFontFace representing the selected font group details, or `NULL`. The returned object is owned by `fontchooser` and must not be modified or freed. [transfer none]

Since 3.2

### gtk_font_chooser_get_font_size ()

    gint                gtk_font_chooser_get_font_size      (GtkFontChooser *fontchooser);

The selected font size.

`fontchooser` : | a GtkFontChooser
Returns : | A n integer representing the selected font size, or -1 if no font size is selected.

Since 3.2

### gtk_font_chooser_get_font ()

    gchar *             gtk_font_chooser_get_font           (GtkFontChooser *fontchooser);

Gets the currently-selected font name.

Note that this can be a different string than what you set with `gtk_font_chooser_set_font()`, as the font chooser widget may normalize font names and thus return a string with a different structure. For example, "Helvetica Italic Bold 12" could be normalized to "Helvetica Bold Italic 12".

Use `pango_font_description_equal()` if you want to compare two font descriptions.

`fontchooser` : | a GtkFontChooser
Returns : | A string with the name of the current font, or `NULL` if no font is selected. You must free this string with `g_free()`. [transfer full][allow-none]

Since 3.2

### gtk_font_chooser_set_font ()

    void                gtk_font_chooser_set_font           (GtkFontChooser *fontchooser,
                                                             const gchar *fontname);

Sets the currently-selected font.

`fontchooser` : | a GtkFontChooser
`fontname` : | a font name like "Helvetica 12" or "Times Bold 18"

Since 3.2

### gtk_font_chooser_get_font_desc ()

    PangoFontDescription * gtk_font_chooser_get_font_desc   (GtkFontChooser *fontchooser);

Gets the currently-selected font.

Note that this can be a different string than what you set with `gtk_font_chooser_set_font()`, as the font chooser widget may normalize font names and thus return a string with a different structure. For example, "Helvetica Italic Bold 12" could be normalized to "Helvetica Bold Italic 12".

Use `pango_font_description_equal()` if you want to compare two font descriptions.

`fontchooser` : | a GtkFontChooser
Returns : | A PangoFontDescription for the current font, or `NULL` if no font is selected. [transfer full][allow-none]

Since 3.2

### gtk_font_chooser_set_font_desc ()

    void                gtk_font_chooser_set_font_desc      (GtkFontChooser *fontchooser,
                                                             const PangoFontDescription *font_desc);

Sets the currently-selected font from `font_desc`.

`fontchooser` : | a GtkFontChooser
`font_desc` : | a PangoFontDescription

Since 3.2

### gtk_font_chooser_get_preview_text ()

    gchar *             gtk_font_chooser_get_preview_text   (GtkFontChooser *fontchooser);

Gets the text displayed in the preview area.

`fontchooser` : | a GtkFontChooser
Returns : | the text displayed in the preview area. [transfer full]

Since 3.2

### gtk_font_chooser_set_preview_text ()

    void                gtk_font_chooser_set_preview_text   (GtkFontChooser *fontchooser,
                                                             const gchar *text);

Sets the text displayed in the preview area. The `text` is used to show how the selected font looks.

`fontchooser` : | a GtkFontChooser
`text` : | the text to display in the preview area. [transfer none]

Since 3.2

### gtk_font_chooser_get_show_preview_entry ()

    gboolean            gtk_font_chooser_get_show_preview_entry
                                                            (GtkFontChooser *fontchooser);

Returns whether the preview entry is shown or not.

`fontchooser` : | a GtkFontChooser
Returns : | `TRUE` if the preview entry is shown or `FALSE` if it is hidden.

Since 3.2

### gtk_font_chooser_set_show_preview_entry ()

    void                gtk_font_chooser_set_show_preview_entry
                                                            (GtkFontChooser *fontchooser,
                                                             gboolean show_preview_entry);

Shows or hides the editable preview entry.

`fontchooser` : | a GtkFontChooser
`show_preview_entry` : | whether to show the editable preview entry or not

Since 3.2

### GtkFontFilterFunc ()

    gboolean            (*GtkFontFilterFunc)                (const PangoFontFamily *family,
                                                             const PangoFontFace *face,
                                                             gpointer data);

The type of function that is used for deciding what fonts get shown in a GtkFontChooser. See `gtk_font_chooser_set_filter_func()`.

`family` : | a PangoFontFamily
`face` : | a PangoFontFace belonging to `family`
`data` : | user data passed to `gtk_font_chooser_set_filter_func()`. [closure]
Returns : | `TRUE` if the font should be displayed

### gtk_font_chooser_set_filter_func ()

    void                gtk_font_chooser_set_filter_func    (GtkFontChooser *fontchooser,
                                                             GtkFontFilterFunc filter,
                                                             gpointer user_data,
                                                             GDestroyNotify destroy);

Adds a filter function that decides which fonts to display in the font chooser.

`fontchooser` : | a GtkFontChooser
`filter` : | a GtkFontFilterFunc, or `NULL`. [allow-none]
`user_data` : | data to pass to `filter`
`destroy` : | function to call to free `data` when it is no longer needed

Since 3.2

## Property Details

### The `"font"` property

      "font"                     gchar*                : Read / Write

The font description as a string, e.g. "Sans Italic 12".

Default value: "Sans 10"

### The `"font-desc"` property

      "font-desc"                PangoFontDescription*  : Read / Write

The font description as a PangoFontDescription.

### The `"preview-text"` property

      "preview-text"             gchar*                : Read / Write

The string with which to preview the font.

Default value: "The quick brown fox jumps over the lazy dog."

### The `"show-preview-entry"` property

      "show-preview-entry"       gboolean              : Read / Write

Whether to show an entry to change the preview text.

Default value: TRUE

## Signal Details

### The `"font-activated"` signal

    void                user_function                      (GtkFontChooser *self,
                                                            gchar          *fontname,
                                                            gpointer        user_data)      : Run First

Emitted when a font is activated. This usually happens when the user double clicks an item, or an item is selected and the user presses one of the keys Space, Shift+Space, Return or Enter.

`self` : | the object which received the signal
`fontname` : | the font name
`user_data` : | user data set when the signal handler was connected.

## See Also

GtkFontChooserDialog, GtkFontChooserWidget, GtkFontButton