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