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418 lines
12 KiB
C
418 lines
12 KiB
C
/* GTK - The GIMP Toolkit
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* gtkfontchooser.c - Abstract interface for font file selectors GUIs
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*
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* Copyright (C) 2006, Emmanuele Bassi
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* Copyright (C) 2011 Alberto Ruiz <aruiz@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkfontchooser.h"
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#include "gtkfontchooserprivate.h"
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#include "gtkintl.h"
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#include "gtktypebuiltins.h"
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#include "gtkprivate.h"
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/**
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* SECTION:gtkfontchooser
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* @Short_description: Interface implemented by widgets displaying fonts
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* @Title: GtkFontChooser
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* @See_also: #GtkFontChooserDialog, #GtkFontChooserWidget, #GtkFontButton
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*
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* #GtkFontChooser is an interface that can be implemented by widgets
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* displaying the list of fonts. In GTK+, the main objects
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* that implement this interface are #GtkFontChooserWidget,
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* #GtkFontChooserDialog and #GtkFontButton.
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*
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* Since: 3.2
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*/
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enum
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{
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SIGNAL_FONT_ACTIVATED,
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LAST_SIGNAL
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};
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static guint chooser_signals[LAST_SIGNAL];
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typedef GtkFontChooserIface GtkFontChooserInterface;
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G_DEFINE_INTERFACE (GtkFontChooser, gtk_font_chooser, G_TYPE_OBJECT);
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static void
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gtk_font_chooser_default_init (GtkFontChooserInterface *iface)
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{
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/**
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* GtkFontChooser:font:
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*
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* The font description as a string, e.g. "Sans Italic 12".
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*/
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g_object_interface_install_property
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(iface,
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g_param_spec_string ("font",
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P_("Font"),
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P_("Font description as a string, e.g. \"Sans Italic 12\""),
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GTK_FONT_CHOOSER_DEFAULT_FONT_NAME,
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GTK_PARAM_READWRITE));
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/**
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* GtkFontChooser:font-desc:
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*
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* The font description as a #PangoFontDescription.
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*/
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g_object_interface_install_property
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(iface,
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g_param_spec_boxed ("font-desc",
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P_("Font description"),
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P_("Font description as a PangoFontDescription struct"),
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PANGO_TYPE_FONT_DESCRIPTION,
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GTK_PARAM_READWRITE));
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/**
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* GtkFontChooser:preview-text:
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*
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* The string with which to preview the font.
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*/
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g_object_interface_install_property
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(iface,
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g_param_spec_string ("preview-text",
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P_("Preview text"),
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P_("The text to display in order to demonstrate the selected font"),
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pango_language_get_sample_string (NULL),
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GTK_PARAM_READWRITE));
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/**
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* GtkFontChooser:show-preview-entry:
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*
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* Whether to show an entry to change the preview text.
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*/
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g_object_interface_install_property
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(iface,
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g_param_spec_boolean ("show-preview-entry",
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P_("Show preview text entry"),
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P_("Whether the preview text entry is shown or not"),
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TRUE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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/**
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* GtkFontChooser::font-activated:
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* @self: the object which received the signal
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* @fontname: the font name
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*
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* Emitted when a font is activated.
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* This usually happens when the user double clicks an item,
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* or an item is selected and the user presses one of the keys
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* Space, Shift+Space, Return or Enter.
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*/
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chooser_signals[SIGNAL_FONT_ACTIVATED] =
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g_signal_new ("font-activated",
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GTK_TYPE_FONT_CHOOSER,
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GtkFontChooserIface, font_activated),
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NULL, NULL,
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NULL,
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G_TYPE_NONE,
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1, G_TYPE_STRING);
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}
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/**
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* gtk_font_chooser_get_font_family:
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* @fontchooser: a #GtkFontChooser
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*
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* Gets the #PangoFontFamily representing the selected font family.
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* Font families are a collection of font faces.
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*
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* If the selected font is not installed, returns %NULL.
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*
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* Returns: (transfer none): A #PangoFontFamily representing the
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* selected font family, or %NULL. The returned object is owned by @fontchooser
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* and must not be modified or freed.
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*
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* Since: 3.2
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*/
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PangoFontFamily *
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gtk_font_chooser_get_font_family (GtkFontChooser *fontchooser)
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{
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g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
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return GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->get_font_family (fontchooser);
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}
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/**
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* gtk_font_chooser_get_font_face:
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* @fontchooser: a #GtkFontChooser
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*
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* Gets the #PangoFontFace representing the selected font group
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* details (i.e. family, slant, weight, width, etc).
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*
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* If the selected font is not installed, returns %NULL.
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*
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* Returns: (transfer none): A #PangoFontFace representing the
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* selected font group details, or %NULL. The returned object is owned by
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* @fontchooser and must not be modified or freed.
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*
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* Since: 3.2
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*/
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PangoFontFace *
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gtk_font_chooser_get_font_face (GtkFontChooser *fontchooser)
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{
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g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
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return GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->get_font_face (fontchooser);
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}
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/**
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* gtk_font_chooser_get_font_size:
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* @fontchooser: a #GtkFontChooser
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*
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* The selected font size.
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*
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* Returns: A n integer representing the selected font size,
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* or -1 if no font size is selected.
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*
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* Since: 3.2
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*/
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gint
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gtk_font_chooser_get_font_size (GtkFontChooser *fontchooser)
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{
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g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), -1);
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return GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->get_font_size (fontchooser);
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}
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/**
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* gtk_font_chooser_get_font:
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* @fontchooser: a #GtkFontChooser
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*
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* Gets the currently-selected font name.
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*
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* Note that this can be a different string than what you set with
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* gtk_font_chooser_set_font(), as the font chooser widget may
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* normalize font names and thus return a string with a different
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* structure. For example, “Helvetica Italic Bold 12” could be
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* normalized to “Helvetica Bold Italic 12”.
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*
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* Use pango_font_description_equal() if you want to compare two
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* font descriptions.
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*
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* Returns: (transfer full) (allow-none): A string with the name
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* of the current font, or %NULL if no font is selected. You must
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* free this string with g_free().
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*
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* Since: 3.2
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*/
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gchar *
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gtk_font_chooser_get_font (GtkFontChooser *fontchooser)
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{
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gchar *fontname;
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g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
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g_object_get (fontchooser, "font", &fontname, NULL);
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return fontname;
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}
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/**
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* gtk_font_chooser_set_font:
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* @fontchooser: a #GtkFontChooser
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* @fontname: a font name like “Helvetica 12” or “Times Bold 18”
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*
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* Sets the currently-selected font.
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*
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* Since: 3.2
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*/
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void
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gtk_font_chooser_set_font (GtkFontChooser *fontchooser,
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const gchar *fontname)
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{
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g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
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g_return_if_fail (fontname != NULL);
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g_object_set (fontchooser, "font", fontname, NULL);
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}
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/**
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* gtk_font_chooser_get_font_desc:
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* @fontchooser: a #GtkFontChooser
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*
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* Gets the currently-selected font.
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*
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* Note that this can be a different string than what you set with
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* gtk_font_chooser_set_font(), as the font chooser widget may
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* normalize font names and thus return a string with a different
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* structure. For example, “Helvetica Italic Bold 12” could be
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* normalized to “Helvetica Bold Italic 12”.
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*
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* Use pango_font_description_equal() if you want to compare two
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* font descriptions.
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*
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* Returns: (transfer full) (allow-none): A #PangoFontDescription for the
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* current font, or %NULL if no font is selected.
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*
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* Since: 3.2
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*/
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PangoFontDescription *
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gtk_font_chooser_get_font_desc (GtkFontChooser *fontchooser)
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{
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PangoFontDescription *font_desc;
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g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
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g_object_get (fontchooser, "font-desc", &font_desc, NULL);
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return font_desc;
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}
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/**
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* gtk_font_chooser_set_font_desc:
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* @fontchooser: a #GtkFontChooser
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* @font_desc: a #PangoFontDescription
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*
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* Sets the currently-selected font from @font_desc.
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*
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* Since: 3.2
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*/
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void
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gtk_font_chooser_set_font_desc (GtkFontChooser *fontchooser,
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const PangoFontDescription *font_desc)
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{
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g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
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g_return_if_fail (font_desc != NULL);
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g_object_set (fontchooser, "font-desc", font_desc, NULL);
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}
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/**
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* gtk_font_chooser_get_preview_text:
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* @fontchooser: a #GtkFontChooser
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*
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* Gets the text displayed in the preview area.
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*
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* Returns: (transfer full): the text displayed in the
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* preview area
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*
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* Since: 3.2
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*/
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gchar *
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gtk_font_chooser_get_preview_text (GtkFontChooser *fontchooser)
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{
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char *text;
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g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
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g_object_get (fontchooser, "preview-text", &text, NULL);
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return text;
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}
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/**
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* gtk_font_chooser_set_preview_text:
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* @fontchooser: a #GtkFontChooser
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* @text: (transfer none): the text to display in the preview area
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*
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* Sets the text displayed in the preview area.
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* The @text is used to show how the selected font looks.
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*
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* Since: 3.2
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*/
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void
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gtk_font_chooser_set_preview_text (GtkFontChooser *fontchooser,
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const gchar *text)
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{
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g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
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g_return_if_fail (text != NULL);
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g_object_set (fontchooser, "preview-text", text, NULL);
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}
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/**
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* gtk_font_chooser_get_show_preview_entry:
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* @fontchooser: a #GtkFontChooser
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*
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* Returns whether the preview entry is shown or not.
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*
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* Returns: %TRUE if the preview entry is shown
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* or %FALSE if it is hidden.
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*
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* Since: 3.2
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*/
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gboolean
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gtk_font_chooser_get_show_preview_entry (GtkFontChooser *fontchooser)
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{
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gboolean show;
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g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), FALSE);
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g_object_get (fontchooser, "show-preview-entry", &show, NULL);
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return show;
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}
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/**
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* gtk_font_chooser_set_show_preview_entry:
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* @fontchooser: a #GtkFontChooser
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* @show_preview_entry: whether to show the editable preview entry or not
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*
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* Shows or hides the editable preview entry.
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*
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* Since: 3.2
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*/
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void
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gtk_font_chooser_set_show_preview_entry (GtkFontChooser *fontchooser,
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gboolean show_preview_entry)
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{
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g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
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show_preview_entry = show_preview_entry != FALSE;
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g_object_set (fontchooser, "show-preview-entry", show_preview_entry, NULL);
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}
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/**
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* gtk_font_chooser_set_filter_func:
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* @fontchooser: a #GtkFontChooser
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* @filter: (allow-none): a #GtkFontFilterFunc, or %NULL
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* @user_data: data to pass to @filter
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* @destroy: function to call to free @data when it is no longer needed
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*
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* Adds a filter function that decides which fonts to display
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* in the font chooser.
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*
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* Since: 3.2
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*/
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void
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gtk_font_chooser_set_filter_func (GtkFontChooser *fontchooser,
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GtkFontFilterFunc filter,
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gpointer user_data,
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GDestroyNotify destroy)
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{
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g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
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GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->set_filter_func (fontchooser,
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filter,
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user_data,
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destroy);
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}
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void
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_gtk_font_chooser_font_activated (GtkFontChooser *chooser,
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const gchar *fontname)
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{
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g_return_if_fail (GTK_IS_FONT_CHOOSER (chooser));
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g_signal_emit (chooser, chooser_signals[SIGNAL_FONT_ACTIVATED], 0, fontname);
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}
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