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Learning_GTK4_tree/gtk/gtkfontdialog.c

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/*
* GTK - The GIMP Toolkit
* Copyright (C) 2022 Red Hat, Inc.
* All rights reserved.
*
* This Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkfontdialog.h"
#include "deprecated/gtkfontchooser.h"
#include "gtkfontchooserdialogprivate.h"
#include "gtkbutton.h"
#include "gtkdialogerror.h"
#include "gtktypebuiltins.h"
#include <glib/gi18n-lib.h>
/**
* GtkFontDialog:
*
* A `GtkFontDialog` object collects the arguments that
* are needed to present a font chooser dialog to the
* user, such as a title for the dialog and whether it
* should be modal.
*
* The dialog is shown with the [method@Gtk.FontDialog.choose_font]
* function or its variants. This API follows the GIO async pattern,
* and the result can be obtained by calling the corresponding
* finish function, such as [method@Gtk.FontDialog.choose_font_finish].
*
* See [class@Gtk.FontDialogButton] for a convenient control
* that uses `GtkFontDialog` and presents the results.
*
* Since: 4.10
*/
/* {{{ GObject implementation */
struct _GtkFontDialog
{
GObject parent_instance;
char *title;
PangoLanguage *language;
PangoFontMap *fontmap;
unsigned int modal : 1;
GtkFilter *filter;
};
enum
{
PROP_TITLE = 1,
PROP_MODAL,
PROP_LANGUAGE,
PROP_FONT_MAP,
PROP_FILTER,
NUM_PROPERTIES
};
static GParamSpec *properties[NUM_PROPERTIES];
G_DEFINE_TYPE (GtkFontDialog, gtk_font_dialog, G_TYPE_OBJECT)
static void
gtk_font_dialog_init (GtkFontDialog *self)
{
self->modal = TRUE;
self->language = pango_language_get_default ();
}
static void
gtk_font_dialog_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkFontDialog *self = GTK_FONT_DIALOG (object);
switch (property_id)
{
case PROP_TITLE:
g_value_set_string (value, self->title);
break;
case PROP_MODAL:
g_value_set_boolean (value, self->modal);
break;
case PROP_LANGUAGE:
g_value_set_boxed (value, self->language);
break;
case PROP_FONT_MAP:
g_value_set_object (value, self->fontmap);
break;
case PROP_FILTER:
g_value_set_object (value, self->filter);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_font_dialog_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkFontDialog *self = GTK_FONT_DIALOG (object);
switch (property_id)
{
case PROP_TITLE:
gtk_font_dialog_set_title (self, g_value_get_string (value));
break;
case PROP_MODAL:
gtk_font_dialog_set_modal (self, g_value_get_boolean (value));
break;
case PROP_LANGUAGE:
gtk_font_dialog_set_language (self, g_value_get_boxed (value));
break;
case PROP_FONT_MAP:
gtk_font_dialog_set_font_map (self, g_value_get_object (value));
break;
case PROP_FILTER:
gtk_font_dialog_set_filter (self, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_font_dialog_finalize (GObject *object)
{
GtkFontDialog *self = GTK_FONT_DIALOG (object);
g_free (self->title);
g_clear_object (&self->fontmap);
g_clear_object (&self->filter);
G_OBJECT_CLASS (gtk_font_dialog_parent_class)->finalize (object);
}
static void
gtk_font_dialog_class_init (GtkFontDialogClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->get_property = gtk_font_dialog_get_property;
object_class->set_property = gtk_font_dialog_set_property;
object_class->finalize = gtk_font_dialog_finalize;
/**
* GtkFontDialog:title: (attributes org.gtk.Property.get=gtk_font_dialog_get_title org.gtk.Property.set=gtk_font_dialog_set_title)
*
* A title that may be shown on the font chooser
* dialog that is presented by [method@Gtk.FontDialog.choose_font].
*
* Since: 4.10
*/
properties[PROP_TITLE] =
g_param_spec_string ("title", NULL, NULL,
NULL,
G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFontDialog:modal: (attributes org.gtk.Property.get=gtk_font_dialog_get_modal org.gtk.Property.set=gtk_font_dialog_set_modal)
*
* Whether the font chooser dialog is modal.
*
* Since: 4.10
*/
properties[PROP_MODAL] =
g_param_spec_boolean ("modal", NULL, NULL,
TRUE,
G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFontDialog:language: (attributes org.gtk.Property.get=gtk_font_dialog_get_language org.gtk.Property.set=gtk_font_dialog_set_language)
*
* The language for which the font features are selected.
*
* Since: 4.10
*/
properties[PROP_LANGUAGE] =
g_param_spec_boxed ("language", NULL, NULL,
PANGO_TYPE_LANGUAGE,
G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFontDialog:font-map: (attributes org.gtk.Property.get=gtk_font_dialog_get_font_map org.gtk.Property.set=gtk_font_dialog_set_font_map)
*
* Sets a custom font map to select fonts from.
*
* A custom font map can be used to present application-specific
* fonts instead of or in addition to the normal system fonts.
*
* Since: 4.10
*/
properties[PROP_FONT_MAP] =
g_param_spec_object ("font-map", NULL, NULL,
PANGO_TYPE_FONT_MAP,
G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkFontDialog:filter: (attributes org.gtk.Property.get=gtk_font_dialog_get_filter org.gtk.Property.set=gtk_font_dialog_set_filter)
*
* Sets a filter to restrict what fonts are shown
* in the font chooser dialog.
*
* Since: 4.10
*/
properties[PROP_FILTER] =
g_param_spec_object ("filter", NULL, NULL,
GTK_TYPE_FILTER,
G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class, NUM_PROPERTIES, properties);
}
/* }}} */
/* {{{ API: Constructor */
/**
* gtk_font_dialog_new:
*
* Creates a new `GtkFontDialog` object.
*
* Returns: the new `GtkFontDialog`
*
* Since: 4.10
*/
GtkFontDialog *
gtk_font_dialog_new (void)
{
return g_object_new (GTK_TYPE_FONT_DIALOG, NULL);
}
/* }}} */
/* {{{ API: Getters and setters */
/**
* gtk_font_dialog_get_title:
* @self: a `GtkFontDialog`
*
* Returns the title that will be shown on the
* font chooser dialog.
*
* Returns: the title
*
* Since: 4.10
*/
const char *
gtk_font_dialog_get_title (GtkFontDialog *self)
{
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), NULL);
return self->title;
}
/**
* gtk_font_dialog_set_title:
* @self: a `GtkFontDialog`
* @title: the new title
*
* Sets the title that will be shown on the
* font chooser dialog.
*
* Since: 4.10
*/
void
gtk_font_dialog_set_title (GtkFontDialog *self,
const char *title)
{
char *new_title;
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
g_return_if_fail (title != NULL);
if (g_strcmp0 (self->title, title) == 0)
return;
new_title = g_strdup (title);
g_free (self->title);
self->title = new_title;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_TITLE]);
}
/**
* gtk_font_dialog_get_modal:
* @self: a `GtkFontDialog`
*
* Returns whether the font chooser dialog
* blocks interaction with the parent window
* while it is presented.
*
* Returns: `TRUE` if the font chooser dialog is modal
*
* Since: 4.10
*/
gboolean
gtk_font_dialog_get_modal (GtkFontDialog *self)
{
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), TRUE);
return self->modal;
}
/**
* gtk_font_dialog_set_modal:
* @self: a `GtkFontDialog`
* @modal: the new value
*
* Sets whether the font chooser dialog
* blocks interaction with the parent window
* while it is presented.
*
* Since: 4.10
*/
void
gtk_font_dialog_set_modal (GtkFontDialog *self,
gboolean modal)
{
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
if (self->modal == modal)
return;
self->modal = modal;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MODAL]);
}
/**
* gtk_font_dialog_get_language:
* @self: a `GtkFontDialog`
*
* Returns the language for which font features are applied.
*
* Returns: (nullable): the language for font features
*
* Since: 4.10
*/
PangoLanguage *
gtk_font_dialog_get_language (GtkFontDialog *self)
{
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), NULL);
return self->language;
}
/**
* gtk_font_dialog_set_language:
* @self: a `GtkFontDialog`
* @language: the language for font features
*
* Sets the language for which font features are applied.
*
* Since: 4.10
*/
void
gtk_font_dialog_set_language (GtkFontDialog *self,
PangoLanguage *language)
{
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
if (self->language == language)
return;
self->language = language;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_LANGUAGE]);
}
/**
* gtk_font_dialog_get_font_map:
* @self: a `GtkFontDialog`
*
* Returns the fontmap from which fonts are selected,
* or `NULL` for the default fontmap.
*
* Returns: (nullable) (transfer none): the fontmap
*
* Since: 4.10
*/
PangoFontMap *
gtk_font_dialog_get_font_map (GtkFontDialog *self)
{
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), NULL);
return self->fontmap;
}
/**
* gtk_font_dialog_set_font_map:
* @self: a `GtkFontDialog`
* @fontmap: (nullable): the fontmap
*
* Sets the fontmap from which fonts are selected.
*
* If @fontmap is `NULL`, the default fontmap is used.
*
* Since: 4.10
*/
void
gtk_font_dialog_set_font_map (GtkFontDialog *self,
PangoFontMap *fontmap)
{
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
if (g_set_object (&self->fontmap, fontmap))
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_FONT_MAP]);
}
/**
* gtk_font_dialog_get_filter:
* @self: a `GtkFontDialog`
*
* Returns the filter that decides which fonts to display
* in the font chooser dialog.
*
* Returns: (nullable) (transfer none): the filter
*
* Since: 4.10
*/
GtkFilter *
gtk_font_dialog_get_filter (GtkFontDialog *self)
{
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), NULL);
return self->filter;
}
/**
* gtk_font_dialog_set_filter:
* @self: a `GtkFontDialog`
* @filter: (nullable): a `GtkFilter`
*
* Adds a filter that decides which fonts to display
* in the font chooser dialog.
*
* The `GtkFilter` must be able to handle both `PangoFontFamily`
* and `PangoFontFace` objects.
*
* Since: 4.10
*/
void
gtk_font_dialog_set_filter (GtkFontDialog *self,
GtkFilter *filter)
{
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
g_return_if_fail (filter == NULL || GTK_IS_FILTER (filter));
if (g_set_object (&self->filter, filter))
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_FILTER]);
}
/* }}} */
/* {{{ Async implementation */
static void response_cb (GTask *task,
int response);
static void
cancelled_cb (GCancellable *cancellable,
GTask *task)
{
response_cb (task, GTK_RESPONSE_CLOSE);
}
typedef struct
{
PangoFontDescription *font_desc;
char *font_features;
PangoLanguage *language;
} FontResult;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
static void
response_cb (GTask *task,
int response)
{
GCancellable *cancellable;
GtkFontChooserDialog *window;
GtkFontChooserLevel level;
cancellable = g_task_get_cancellable (task);
if (cancellable)
g_signal_handlers_disconnect_by_func (cancellable, cancelled_cb, task);
window = GTK_FONT_CHOOSER_DIALOG (g_task_get_task_data (task));
level = gtk_font_chooser_get_level (GTK_FONT_CHOOSER (window));
if (response == GTK_RESPONSE_OK)
{
if (level & GTK_FONT_CHOOSER_LEVEL_FEATURES)
{
FontResult font_result;
font_result.font_desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (window));
font_result.font_features = gtk_font_chooser_get_font_features (GTK_FONT_CHOOSER (window));
font_result.language = pango_language_from_string (gtk_font_chooser_get_language (GTK_FONT_CHOOSER (window)));
g_task_return_pointer (task, &font_result, NULL);
g_clear_pointer (&font_result.font_desc, pango_font_description_free);
g_clear_pointer (&font_result.font_features, g_free);
}
else if (level & GTK_FONT_CHOOSER_LEVEL_SIZE)
{
PangoFontDescription *font_desc;
font_desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (window));
g_task_return_pointer (task, font_desc, (GDestroyNotify) pango_font_description_free);
}
else if (level & GTK_FONT_CHOOSER_LEVEL_STYLE)
{
PangoFontFace *face;
face = gtk_font_chooser_get_font_face (GTK_FONT_CHOOSER (window));
g_task_return_pointer (task, g_object_ref (face), g_object_unref);
}
else
{
PangoFontFamily *family;
family = gtk_font_chooser_get_font_family (GTK_FONT_CHOOSER (window));
g_task_return_pointer (task, g_object_ref (family), g_object_unref);
}
}
else if (response == GTK_RESPONSE_CLOSE)
g_task_return_new_error (task, GTK_DIALOG_ERROR, GTK_DIALOG_ERROR_CANCELLED, "Cancelled by application");
else if (response == GTK_RESPONSE_CANCEL ||
response == GTK_RESPONSE_DELETE_EVENT)
g_task_return_new_error (task, GTK_DIALOG_ERROR, GTK_DIALOG_ERROR_DISMISSED, "Dismissed by user");
else
g_task_return_new_error (task, GTK_DIALOG_ERROR, GTK_DIALOG_ERROR_FAILED, "Unknown failure (%d)", response);
g_object_unref (task);
}
G_GNUC_END_IGNORE_DEPRECATIONS
static void
dialog_response (GtkDialog *dialog,
int response,
GTask *task)
{
response_cb (task, response);
}
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
static GtkWidget *
create_font_chooser (GtkFontDialog *self,
GtkWindow *parent,
PangoFontDescription *initial_value,
GtkFontChooserLevel level)
{
GtkWidget *window;
const char *title;
if (self->title)
title = self->title;
else
title = _("Pick a Font");
window = gtk_font_chooser_dialog_new (title, parent);
gtk_font_chooser_set_level (GTK_FONT_CHOOSER (window), level);
gtk_window_set_modal (GTK_WINDOW (window), TRUE);
if (self->language)
gtk_font_chooser_set_language (GTK_FONT_CHOOSER (window),
pango_language_to_string (self->language));
if (self->fontmap)
gtk_font_chooser_set_font_map (GTK_FONT_CHOOSER (window), self->fontmap);
if (self->filter)
gtk_font_chooser_dialog_set_filter (GTK_FONT_CHOOSER_DIALOG (window), self->filter);
if (initial_value)
gtk_font_chooser_set_font_desc (GTK_FONT_CHOOSER (window), initial_value);
return window;
}
G_GNUC_END_IGNORE_DEPRECATIONS
/* }}} */
/* {{{ Async API */
/**
* gtk_font_dialog_choose_family:
* @self: a `GtkFontDialog`
* @parent: (nullable): the parent `GtkWindow`
* @initial_value: (nullable): the initial value
* @cancellable: (nullable): a `GCancellable` to cancel the operation
* @callback: (scope async): a callback to call when the operation is complete
* @user_data: (closure callback): data to pass to @callback
*
* This function initiates a font selection operation by
* presenting a dialog to the user for selecting a font family.
*
* The @callback will be called when the dialog is dismissed.
* It should call [method@Gtk.FontDialog.choose_family_finish]
* to obtain the result.
*
* Since: 4.10
*/
void
gtk_font_dialog_choose_family (GtkFontDialog *self,
GtkWindow *parent,
PangoFontFamily *initial_value,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GtkWidget *window;
PangoFontDescription *desc = NULL;
GTask *task;
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
if (initial_value)
{
desc = pango_font_description_new ();
pango_font_description_set_family (desc, pango_font_family_get_name (initial_value));
}
window = create_font_chooser (self, parent, desc,
GTK_FONT_CHOOSER_LEVEL_FAMILY);
g_clear_pointer (&desc, pango_font_description_free);
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_check_cancellable (task, FALSE);
g_task_set_source_tag (task, gtk_font_dialog_choose_family);
g_task_set_task_data (task, window, (GDestroyNotify) gtk_window_destroy);
if (cancellable)
g_signal_connect (cancellable, "cancelled", G_CALLBACK (cancelled_cb), task);
g_signal_connect (window, "response", G_CALLBACK (dialog_response), task);
gtk_window_present (GTK_WINDOW (window));
}
/**
* gtk_font_dialog_choose_family_finish:
* @self: a `GtkFontDialog`
* @result: a `GAsyncResult`
* @error: return location for a [enum@Gtk.DialogError] error
*
* Finishes the [method@Gtk.FontDialog.choose_family] call
* and returns the resulting family.
*
* This function never returns an error. If the operation is
* not finished successfully, the value passed as @initial_value
* to [method@Gtk.FontDialog.choose_family] is returned.
* Returns: (nullable) (transfer full): the selected family
*
* Since: 4.10
*/
PangoFontFamily *
gtk_font_dialog_choose_family_finish (GtkFontDialog *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), NULL);
g_return_val_if_fail (g_task_is_valid (result, self), NULL);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) == gtk_font_dialog_choose_family, NULL);
/* Destroy the dialog window not to be bound to GTask lifecycle */
g_task_set_task_data (G_TASK (result), NULL, NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* gtk_font_dialog_choose_face:
* @self: a `GtkFontDialog`
* @parent: (nullable): the parent `GtkWindow`
* @initial_value: (nullable): the initial value
* @cancellable: (nullable): a `GCancellable` to cancel the operation
* @callback: (scope async): a callback to call when the operation is complete
* @user_data: (closure callback): data to pass to @callback
*
* This function initiates a font selection operation by
* presenting a dialog to the user for selecting a font face
* (i.e. a font family and style, but not a specific font size).
*
* The @callback will be called when the dialog is dismissed.
* It should call [method@Gtk.FontDialog.choose_face_finish]
* to obtain the result.
*
* Since: 4.10
*/
void
gtk_font_dialog_choose_face (GtkFontDialog *self,
GtkWindow *parent,
PangoFontFace *initial_value,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GtkWidget *window;
PangoFontDescription *desc = NULL;
GTask *task;
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
if (initial_value)
desc = pango_font_face_describe (initial_value);
window = create_font_chooser (self, parent, desc,
GTK_FONT_CHOOSER_LEVEL_FAMILY |
GTK_FONT_CHOOSER_LEVEL_STYLE);
g_clear_pointer (&desc, pango_font_description_free);
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_check_cancellable (task, FALSE);
g_task_set_source_tag (task, gtk_font_dialog_choose_face);
g_task_set_task_data (task, window, (GDestroyNotify) gtk_window_destroy);
if (cancellable)
g_signal_connect (cancellable, "cancelled", G_CALLBACK (cancelled_cb), task);
g_signal_connect (window, "response", G_CALLBACK (dialog_response), task);
gtk_window_present (GTK_WINDOW (window));
}
/**
* gtk_font_dialog_choose_face_finish:
* @self: a `GtkFontDialog`
* @result: a `GAsyncResult`
* @error: return location for a [enum@Gtk.DialogError] error
*
* Finishes the [method@Gtk.FontDialog.choose_face] call
* and returns the resulting font face.
*
* Returns: (nullable) (transfer full): the selected font face
*
* Since: 4.10
*/
PangoFontFace *
gtk_font_dialog_choose_face_finish (GtkFontDialog *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), NULL);
g_return_val_if_fail (g_task_is_valid (result, self), NULL);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) == gtk_font_dialog_choose_face, NULL);
/* Destroy the dialog window not to be bound to GTask lifecycle */
g_task_set_task_data (G_TASK (result), NULL, NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* gtk_font_dialog_choose_font:
* @self: a `GtkFontDialog`
* @parent: (nullable): the parent `GtkWindow`
* @initial_value: (nullable): the font to select initially
* @cancellable: (nullable): a `GCancellable` to cancel the operation
* @callback: (scope async): a callback to call when the operation is complete
* @user_data: (closure callback): data to pass to @callback
*
* This function initiates a font selection operation by
* presenting a dialog to the user for selecting a font.
*
* The @callback will be called when the dialog is dismissed.
* It should call [method@Gtk.FontDialog.choose_font_finish]
* to obtain the result.
*
* If you want to let the user select font features as well,
* use [method@Gtk.FontDialog.choose_font_and_features] instead.
*
* Since: 4.10
*/
void
gtk_font_dialog_choose_font (GtkFontDialog *self,
GtkWindow *parent,
PangoFontDescription *initial_value,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GtkWidget *window;
GTask *task;
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
window = create_font_chooser (self, parent, initial_value,
GTK_FONT_CHOOSER_LEVEL_FAMILY |
GTK_FONT_CHOOSER_LEVEL_STYLE |
GTK_FONT_CHOOSER_LEVEL_SIZE |
GTK_FONT_CHOOSER_LEVEL_VARIATIONS);
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_check_cancellable (task, FALSE);
g_task_set_source_tag (task, gtk_font_dialog_choose_font);
g_task_set_task_data (task, window, (GDestroyNotify) gtk_window_destroy);
if (cancellable)
g_signal_connect (cancellable, "cancelled", G_CALLBACK (cancelled_cb), task);
g_signal_connect (window, "response", G_CALLBACK (dialog_response), task);
gtk_window_present (GTK_WINDOW (window));
}
/**
* gtk_font_dialog_choose_font_finish:
* @self: a `GtkFontDialog`
* @result: a `GAsyncResult`
* @error: return location for a [enum@Gtk.DialogError] error
*
* Finishes the [method@Gtk.FontDialog.choose_font] call
* and returns the resulting font description.
*
* Returns: (nullable) (transfer full): the selected font
*
* Since: 4.10
*/
PangoFontDescription *
gtk_font_dialog_choose_font_finish (GtkFontDialog *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), NULL);
g_return_val_if_fail (g_task_is_valid (result, self), NULL);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) == gtk_font_dialog_choose_font, NULL);
/* Destroy the dialog window not to be bound to GTask lifecycle */
g_task_set_task_data (G_TASK (result), NULL, NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* gtk_font_dialog_choose_font_and_features:
* @self: a `GtkFontDialog`
* @parent: (nullable): the parent `GtkWindow`
* @initial_value: (nullable): the font to select initially
* @cancellable: (nullable): a `GCancellable` to cancel the operation
* @callback: (scope async): a callback to call when the operation is complete
* @user_data: (closure callback): data to pass to @callback
*
* This function initiates a font selection operation by
* presenting a dialog to the user for selecting a font and
* font features.
*
* Font features affect how the font is rendered, for example
* enabling glyph variants or ligatures.
*
* The @callback will be called when the dialog is dismissed.
* It should call [method@Gtk.FontDialog.choose_font_and_features_finish]
* to obtain the result.
*
* Since: 4.10
*/
void
gtk_font_dialog_choose_font_and_features (GtkFontDialog *self,
GtkWindow *parent,
PangoFontDescription *initial_value,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GtkWidget *window;
GTask *task;
g_return_if_fail (GTK_IS_FONT_DIALOG (self));
window = create_font_chooser (self, parent, initial_value,
GTK_FONT_CHOOSER_LEVEL_FAMILY |
GTK_FONT_CHOOSER_LEVEL_STYLE |
GTK_FONT_CHOOSER_LEVEL_SIZE |
GTK_FONT_CHOOSER_LEVEL_VARIATIONS |
GTK_FONT_CHOOSER_LEVEL_FEATURES);
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_check_cancellable (task, FALSE);
g_task_set_source_tag (task, gtk_font_dialog_choose_font_and_features);
g_task_set_task_data (task, window, (GDestroyNotify) gtk_window_destroy);
if (cancellable)
g_signal_connect (cancellable, "cancelled", G_CALLBACK (cancelled_cb), task);
g_signal_connect (window, "response", G_CALLBACK (dialog_response), task);
gtk_window_present (GTK_WINDOW (window));
}
/**
* gtk_font_dialog_choose_font_and_features_finish:
* @self: a `GtkFontDialog`
* @result: a `GAsyncResult`
* @font_desc: (out): return location for font description
* @font_features: (out): return location for font features
* @language: (out): return location for the language
* @error: return location for a [enum@Gtk.DialogError] error
*
* Finishes the [method@Gtk.FontDialog.choose_font_and_features]
* call and returns the resulting font description and font features.
*
* Returns: `TRUE` if a font was selected. Otherwise `FALSE` is returned
* and @error is set
*
* Since: 4.10
*/
gboolean
gtk_font_dialog_choose_font_and_features_finish (GtkFontDialog *self,
GAsyncResult *result,
PangoFontDescription **font_desc,
char **font_features,
PangoLanguage **language,
GError **error)
{
FontResult *font_result;
g_return_val_if_fail (GTK_IS_FONT_DIALOG (self), FALSE);
g_return_val_if_fail (g_task_is_valid (result, self), FALSE);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) == gtk_font_dialog_choose_font_and_features, FALSE);
/* Destroy the dialog window not to be bound to GTask lifecycle */
g_task_set_task_data (G_TASK (result), NULL, NULL);
font_result = g_task_propagate_pointer (G_TASK (result), error);
if (font_result)
{
*font_desc = g_steal_pointer (&font_result->font_desc);
*font_features = g_steal_pointer (&font_result->font_features);
*language = g_steal_pointer (&font_result->language);
}
return font_result != NULL;
}
/* }}} */
/* vim:set foldmethod=marker expandtab: */
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