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gnome-control-center/panels/background/cc-background-chooser.c
velsinki 18413cb172 background: Make CcBackgroundPaintable independent 
To make the CcBackgroundPaintable fully reusable, it has to know the
desired thumbnail size and the thumbnail factory. We add a width and
height property, and modify the thumbnail retrieval of CcBackgroundItem
to use the scale factor now.

This also allows us to greatly simplify the background sources, so that
they now only do one thing: provide CcBackgroundItems from different
sources.

We keep the fixed thumbnail height and width for the chooser, which
makes more sense now that it is in the chooser code instead of the
background source code.
2023-12-19 14:14:28 +00:00

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/* cc-background-chooser.c
*
* Copyright 2019 Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "cc-background-chooser"
#include <glib/gi18n.h>
#include <libgnome-desktop/gnome-desktop-thumbnail.h>
#include "bg-colors-source.h"
#include "bg-recent-source.h"
#include "bg-wallpapers-source.h"
#include "cc-background-chooser.h"
#include "cc-background-paintable.h"
#define THUMBNAIL_WIDTH 144
#define THUMBNAIL_HEIGHT (THUMBNAIL_WIDTH * 3 / 4)
struct _CcBackgroundChooser
{
GtkBox parent;
GtkFlowBox *flowbox;
GtkWidget *recent_box;
GtkFlowBox *recent_flowbox;
gboolean recent_selected;
BgWallpapersSource *wallpapers_source;
BgRecentSource *recent_source;
GnomeDesktopThumbnailFactory *thumbnail_factory;
};
G_DEFINE_TYPE (CcBackgroundChooser, cc_background_chooser, GTK_TYPE_BOX)
enum
{
BACKGROUND_CHOSEN,
N_SIGNALS,
};
static guint signals [N_SIGNALS];
static void
emit_background_chosen (CcBackgroundChooser *self)
{
g_autoptr(GList) list = NULL;
CcBackgroundItem *item;
GtkFlowBox *flowbox;
flowbox = self->recent_selected ? self->recent_flowbox : self->flowbox;
list = gtk_flow_box_get_selected_children (flowbox);
g_assert (g_list_length (list) == 1);
item = g_object_get_data (list->data, "item");
g_signal_emit (self, signals[BACKGROUND_CHOSEN], 0, item);
}
static void
on_delete_background_clicked_cb (GtkButton *button,
BgRecentSource *source)
{
GtkWidget *parent;
CcBackgroundItem *item;
parent = gtk_widget_get_parent (gtk_widget_get_parent (GTK_WIDGET (button)));
g_assert (GTK_IS_FLOW_BOX_CHILD (parent));
item = g_object_get_data (G_OBJECT (parent), "item");
bg_recent_source_remove_item (source, item);
}
static void
direction_changed_cb (GtkWidget *widget,
GtkTextDirection *previous_direction,
GdkPaintable *paintable)
{
g_object_set (paintable,
"text-direction", gtk_widget_get_direction (widget),
NULL);
}
static GtkWidget*
create_widget_func (gpointer model_item,
gpointer user_data)
{
g_autoptr(CcBackgroundPaintable) paintable = NULL;
GnomeDesktopThumbnailFactory *thumbnail_factory;
CcBackgroundItem *item;
GtkWidget *overlay;
GtkWidget *child;
GtkWidget *picture;
GtkWidget *icon;
GtkWidget *check;
GtkWidget *button = NULL;
BgSource *source;
source = BG_SOURCE (user_data);
item = CC_BACKGROUND_ITEM (model_item);
thumbnail_factory = g_object_get_data (G_OBJECT (source), "thumbnail-factory");
paintable = cc_background_paintable_new (thumbnail_factory,
item,
CC_BACKGROUND_PAINT_LIGHT_DARK,
THUMBNAIL_WIDTH,
THUMBNAIL_HEIGHT);
picture = gtk_picture_new_for_paintable (GDK_PAINTABLE (paintable));
gtk_picture_set_can_shrink (GTK_PICTURE (picture), FALSE);
g_object_bind_property (picture, "scale-factor",
paintable, "scale-factor", G_BINDING_SYNC_CREATE);
g_signal_connect_object (picture, "direction-changed",
G_CALLBACK (direction_changed_cb), paintable, 0);
icon = gtk_image_new_from_icon_name ("slideshow-symbolic");
gtk_widget_set_halign (icon, GTK_ALIGN_START);
gtk_widget_set_valign (icon, GTK_ALIGN_END);
gtk_widget_set_visible (icon, cc_background_item_changes_with_time (item));
gtk_widget_add_css_class (icon, "slideshow-icon");
check = gtk_image_new_from_icon_name ("background-selected-symbolic");
gtk_widget_set_halign (check, GTK_ALIGN_END);
gtk_widget_set_valign (check, GTK_ALIGN_END);
gtk_widget_add_css_class (check, "selected-check");
if (BG_IS_RECENT_SOURCE (source))
{
button = gtk_button_new_from_icon_name ("window-close-symbolic");
gtk_widget_set_halign (button, GTK_ALIGN_END);
gtk_widget_set_valign (button, GTK_ALIGN_START);
gtk_widget_add_css_class (button, "osd");
gtk_widget_add_css_class (button, "circular");
gtk_widget_add_css_class (button, "remove-button");
gtk_widget_set_tooltip_text (GTK_WIDGET (button), _("Remove Background"));
g_signal_connect (button,
"clicked",
G_CALLBACK (on_delete_background_clicked_cb),
source);
}
overlay = gtk_overlay_new ();
gtk_widget_set_overflow (overlay, GTK_OVERFLOW_HIDDEN);
gtk_widget_add_css_class (overlay, "background-thumbnail");
gtk_overlay_set_child (GTK_OVERLAY (overlay), picture);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), icon);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), check);
if (button)
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), button);
gtk_accessible_update_property (GTK_ACCESSIBLE (overlay),
GTK_ACCESSIBLE_PROPERTY_LABEL,
cc_background_item_get_name (item),
-1);
child = gtk_flow_box_child_new ();
gtk_widget_set_halign (child, GTK_ALIGN_CENTER);
gtk_widget_set_valign (child, GTK_ALIGN_CENTER);
gtk_flow_box_child_set_child (GTK_FLOW_BOX_CHILD (child), overlay);
g_object_set_data_full (G_OBJECT (child), "item", g_object_ref (item), g_object_unref);
return child;
}
static void
update_recent_visibility (CcBackgroundChooser *self)
{
GListStore *store;
gboolean has_items;
store = bg_source_get_liststore (BG_SOURCE (self->recent_source));
has_items = g_list_model_get_n_items (G_LIST_MODEL (store)) != 0;
gtk_widget_set_visible (self->recent_box, has_items);
}
static void
setup_flowbox (CcBackgroundChooser *self)
{
GListStore *store;
store = bg_source_get_liststore (BG_SOURCE (self->wallpapers_source));
gtk_flow_box_bind_model (self->flowbox,
G_LIST_MODEL (store),
create_widget_func,
self->wallpapers_source,
NULL);
store = bg_source_get_liststore (BG_SOURCE (self->recent_source));
gtk_flow_box_bind_model (self->recent_flowbox,
G_LIST_MODEL (store),
create_widget_func,
self->recent_source,
NULL);
update_recent_visibility (self);
g_signal_connect_object (store,
"items-changed",
G_CALLBACK (update_recent_visibility),
self,
G_CONNECT_SWAPPED);
}
static void
on_item_activated_cb (CcBackgroundChooser *self,
GtkFlowBoxChild *child,
GtkFlowBox *flowbox)
{
self->recent_selected = flowbox == self->recent_flowbox;
if (self->recent_selected)
gtk_flow_box_unselect_all (self->flowbox);
else
gtk_flow_box_unselect_all (self->recent_flowbox);
emit_background_chosen (self);
}
static void
file_dialog_open_cb (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
CcBackgroundChooser *self = CC_BACKGROUND_CHOOSER (user_data);
GtkFileDialog *file_dialog = GTK_FILE_DIALOG (source_object);
g_autoptr(GListModel) files = NULL;
g_autoptr(GError) error = NULL;
guint i;
files = gtk_file_dialog_open_multiple_finish (file_dialog, res, &error);
if (error != NULL)
{
g_warning ("Failed to pick backgrounds: %s", error->message);
return;
}
for (i = 0; i < g_list_model_get_n_items (files); i++)
{
g_autoptr(GFile) file = g_list_model_get_item (files, i);
g_autofree gchar *filename = g_file_get_path (file);
bg_recent_source_add_file (self->recent_source, filename);
}
}
/* GObject overrides */
static void
cc_background_chooser_finalize (GObject *object)
{
CcBackgroundChooser *self = (CcBackgroundChooser *)object;
g_clear_object (&self->recent_source);
g_clear_object (&self->wallpapers_source);
g_clear_object (&self->thumbnail_factory);
G_OBJECT_CLASS (cc_background_chooser_parent_class)->finalize (object);
}
static void
cc_background_chooser_class_init (CcBackgroundChooserClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->finalize = cc_background_chooser_finalize;
signals[BACKGROUND_CHOSEN] = g_signal_new ("background-chosen",
CC_TYPE_BACKGROUND_CHOOSER,
G_SIGNAL_RUN_FIRST,
0, NULL, NULL, NULL,
G_TYPE_NONE,
1,
CC_TYPE_BACKGROUND_ITEM);
gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/control-center/background/cc-background-chooser.ui");
gtk_widget_class_bind_template_child (widget_class, CcBackgroundChooser, flowbox);
gtk_widget_class_bind_template_child (widget_class, CcBackgroundChooser, recent_box);
gtk_widget_class_bind_template_child (widget_class, CcBackgroundChooser, recent_flowbox);
gtk_widget_class_bind_template_callback (widget_class, on_item_activated_cb);
}
static void
cc_background_chooser_init (CcBackgroundChooser *self)
{
gtk_widget_init_template (GTK_WIDGET (self));
self->recent_source = bg_recent_source_new ();
self->wallpapers_source = bg_wallpapers_source_new ();
self->thumbnail_factory = gnome_desktop_thumbnail_factory_new (GNOME_DESKTOP_THUMBNAIL_SIZE_LARGE);
g_object_set_data (G_OBJECT (self->recent_source), "thumbnail-factory", self->thumbnail_factory);
g_object_set_data (G_OBJECT (self->wallpapers_source), "thumbnail-factory", self->thumbnail_factory);
setup_flowbox (self);
}
void
cc_background_chooser_select_file (CcBackgroundChooser *self)
{
g_autoptr(GFile) pictures_folder = NULL;
GtkFileFilter *filter;
GtkFileDialog *file_dialog;
GtkWindow *toplevel;
GListStore *filters;
g_return_if_fail (CC_IS_BACKGROUND_CHOOSER (self));
toplevel = (GtkWindow*) gtk_widget_get_native (GTK_WIDGET (self));
file_dialog = gtk_file_dialog_new ();
gtk_file_dialog_set_title (file_dialog, _("Select a picture"));
gtk_file_dialog_set_modal (file_dialog, TRUE);
filter = gtk_file_filter_new ();
gtk_file_filter_add_pixbuf_formats (filter);
filters = g_list_store_new (GTK_TYPE_FILE_FILTER);
g_list_store_append (filters, filter);
gtk_file_dialog_set_filters (file_dialog, G_LIST_MODEL (filters));
pictures_folder = g_file_new_for_path (g_get_user_special_dir (G_USER_DIRECTORY_PICTURES));
gtk_file_dialog_set_initial_folder (file_dialog, pictures_folder);
gtk_file_dialog_open_multiple (file_dialog,
toplevel,
NULL,
file_dialog_open_cb,
self);
}
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