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gnome-control-center/panels/background/cc-background-chooser.c
Alexander Mikhaylenko 13ffacb083 background: Fix thumbnail size on hidpi 
Use GIcon GtkImage API instead lf GdkPixbuf. The latter treats pixbufs as
always being in 1x scale and upscales them to compensate, while in our case
they are pre-scaled.

Fixes https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/787
2021-03-04 13:29:27 +00:00

385 lines
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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-pictures-source.h"
#include "bg-recent-source.h"
#include "bg-wallpapers-source.h"
#include "cc-background-chooser.h"
struct _CcBackgroundChooser
{
GtkBox parent;
GtkFlowBox *flowbox;
GtkWidget *recent_box;
GtkFlowBox *recent_flowbox;
gboolean recent_selected;
BgWallpapersSource *wallpapers_source;
BgRecentSource *recent_source;
};
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 GtkWidget*
create_widget_func (gpointer model_item,
gpointer user_data)
{
g_autoptr(GdkPixbuf) pixbuf = NULL;
CcBackgroundItem *item;
GtkWidget *overlay;
GtkWidget *child;
GtkWidget *image;
GtkWidget *icon;
GtkWidget *button = NULL;
BgSource *source;
source = BG_SOURCE (user_data);
item = CC_BACKGROUND_ITEM (model_item);
pixbuf = cc_background_item_get_thumbnail (item,
bg_source_get_thumbnail_factory (source),
bg_source_get_thumbnail_width (source),
bg_source_get_thumbnail_height (source),
bg_source_get_scale_factor (source));
image = gtk_image_new_from_gicon (G_ICON (pixbuf), GTK_ICON_SIZE_DIALOG);
gtk_widget_show (image);
icon = gtk_image_new_from_icon_name("slideshow-emblem", GTK_ICON_SIZE_BUTTON);
gtk_image_set_pixel_size (GTK_IMAGE (icon), 16);
gtk_widget_set_margin_start (icon, 8);
gtk_widget_set_margin_end (icon, 8);
gtk_widget_set_margin_top (icon, 8);
gtk_widget_set_margin_bottom (icon, 8);
gtk_widget_set_halign (icon, GTK_ALIGN_END);
gtk_widget_set_valign (icon, GTK_ALIGN_END);
gtk_widget_set_visible (icon, cc_background_item_changes_with_time (item));
gtk_style_context_add_class (gtk_widget_get_style_context (icon), "slideshow-emblem");
if (BG_IS_RECENT_SOURCE (source))
{
button = gtk_button_new_from_icon_name ("window-close-symbolic", GTK_ICON_SIZE_BUTTON);
gtk_widget_set_halign (button, GTK_ALIGN_END);
gtk_widget_set_valign (button, GTK_ALIGN_START);
gtk_widget_set_margin_start (icon, 6);
gtk_widget_set_margin_end (icon, 6);
gtk_widget_set_margin_top (icon, 6);
gtk_widget_set_margin_bottom (icon, 6);
gtk_widget_show (button);
gtk_style_context_add_class (gtk_widget_get_style_context (button), "osd");
gtk_style_context_add_class (gtk_widget_get_style_context (button), "remove-button");
g_signal_connect (button,
"clicked",
G_CALLBACK (on_delete_background_clicked_cb),
source);
}
overlay = gtk_overlay_new ();
gtk_container_add (GTK_CONTAINER (overlay), image);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), icon);
if (button)
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), button);
gtk_widget_show (overlay);
child = gtk_flow_box_child_new();
gtk_widget_set_halign (child, GTK_ALIGN_CENTER);
gtk_widget_set_valign (child, GTK_ALIGN_CENTER);
gtk_container_add (GTK_CONTAINER (child), overlay);
gtk_widget_show (child);
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 (GtkFlowBox *flowbox,
GtkFlowBoxChild *child,
CcBackgroundChooser *self)
{
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
on_file_chooser_response_cb (GtkDialog *filechooser,
gint response,
CcBackgroundChooser *self)
{
if (response == GTK_RESPONSE_ACCEPT)
{
g_autoptr(GSList) filenames = NULL;
GSList *l;
filenames = gtk_file_chooser_get_filenames (GTK_FILE_CHOOSER (filechooser));
for (l = filenames; l != NULL; l = l->next)
{
g_autofree gchar *filename = l->data;
bg_recent_source_add_file (self->recent_source, filename);
}
}
gtk_widget_destroy (GTK_WIDGET (filechooser));
}
static void
on_file_chooser_selection_changed_cb (GtkFileChooser *chooser,
GnomeDesktopThumbnailFactory *thumbnail_factory)
{
g_autofree gchar *uri = NULL;
uri = gtk_file_chooser_get_uri (chooser);
if (uri)
{
g_autoptr(GFileInfo) file_info = NULL;
g_autoptr(GdkPixbuf) pixbuf = NULL;
g_autofree gchar *mime_type = NULL;
g_autoptr(GFile) file = NULL;
GtkWidget *preview;
preview = gtk_file_chooser_get_preview_widget (chooser);
file = g_file_new_for_uri (uri);
file_info = g_file_query_info (file,
"standard::*",
G_FILE_QUERY_INFO_NONE,
NULL,
NULL);
if (file_info && g_file_info_get_file_type (file_info) != G_FILE_TYPE_DIRECTORY)
mime_type = g_strdup (g_file_info_get_content_type (file_info));
if (mime_type)
{
pixbuf = gnome_desktop_thumbnail_factory_generate_thumbnail (thumbnail_factory,
uri,
mime_type);
}
gtk_dialog_set_response_sensitive (GTK_DIALOG (chooser),
GTK_RESPONSE_ACCEPT,
pixbuf != NULL);
if (pixbuf)
gtk_image_set_from_pixbuf (GTK_IMAGE (preview), pixbuf);
else
gtk_image_set_from_icon_name (GTK_IMAGE (preview), "dialog-question", GTK_ICON_SIZE_DIALOG);
}
gtk_file_chooser_set_preview_widget_active (chooser, TRUE);
}
/* 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_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 (GTK_WIDGET (self));
self->wallpapers_source = bg_wallpapers_source_new (GTK_WIDGET (self));
setup_flowbox (self);
}
void
cc_background_chooser_select_file (CcBackgroundChooser *self)
{
g_autoptr(GnomeDesktopThumbnailFactory) factory = NULL;
GtkFileFilter *filter;
GtkWidget *filechooser;
GtkWindow *toplevel;
GtkWidget *preview;
g_return_if_fail (CC_IS_BACKGROUND_CHOOSER (self));
toplevel = (GtkWindow*) gtk_widget_get_toplevel (GTK_WIDGET (self));
filechooser = gtk_file_chooser_dialog_new (_("Select a picture"),
toplevel,
GTK_FILE_CHOOSER_ACTION_OPEN,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_Open"), GTK_RESPONSE_ACCEPT,
NULL);
gtk_window_set_modal (GTK_WINDOW (filechooser), TRUE);
preview = gtk_image_new ();
gtk_widget_set_size_request (preview, 154, -1);
gtk_file_chooser_set_preview_widget (GTK_FILE_CHOOSER (filechooser), preview);
gtk_file_chooser_set_use_preview_label (GTK_FILE_CHOOSER (filechooser), FALSE);
gtk_file_chooser_set_select_multiple (GTK_FILE_CHOOSER (filechooser), TRUE);
gtk_widget_show (preview);
factory = gnome_desktop_thumbnail_factory_new (GNOME_DESKTOP_THUMBNAIL_SIZE_LARGE);
g_signal_connect_after (filechooser,
"selection-changed",
G_CALLBACK (on_file_chooser_selection_changed_cb),
factory);
g_object_set_data_full (G_OBJECT (filechooser),
"factory",
g_object_ref (factory),
g_object_unref);
filter = gtk_file_filter_new ();
gtk_file_filter_add_pixbuf_formats (filter);
gtk_file_chooser_set_filter (GTK_FILE_CHOOSER (filechooser), filter);
gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (filechooser),
g_get_user_special_dir (G_USER_DIRECTORY_PICTURES));
g_signal_connect_object (filechooser,
"response",
G_CALLBACK (on_file_chooser_response_cb),
self,
0);
gtk_window_present (GTK_WINDOW (filechooser));
}
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