diff options
Diffstat (limited to 'subprojects/libhandy/glade/glade-hdy-carousel.c')
| -rw-r--r-- | subprojects/libhandy/glade/glade-hdy-carousel.c | 460 |
1 files changed, 460 insertions, 0 deletions
diff --git a/subprojects/libhandy/glade/glade-hdy-carousel.c b/subprojects/libhandy/glade/glade-hdy-carousel.c new file mode 100644 index 0000000..c06a4e4 --- /dev/null +++ b/subprojects/libhandy/glade/glade-hdy-carousel.c @@ -0,0 +1,460 @@ +/* + * Copyright (C) 2019 Alexander Mikhaylenko <exalm7659@gmail.com> + * + * SPDX-License-Identifier: LGPL-2.1+ + * + * Based on + * glade-gtk-stack.c - GladeWidgetAdaptor for GtkStack + * Copyright (C) 2014 Red Hat, Inc. + */ + +#include <config.h> +#include <glib/gi18n-lib.h> + +#include "glade-hdy-carousel.h" + +#include <gladeui/glade.h> +#include "glade-hdy-utils.h" + +#include <math.h> + +static gint +hdy_carousel_get_page (HdyCarousel *carousel) +{ + return round (hdy_carousel_get_position (carousel)); +} + +static gboolean +hdy_carousel_is_transient (HdyCarousel *carousel) +{ + return fmod (hdy_carousel_get_position (carousel), 1.0) > 0.00001; +} + +static gint +get_n_pages_excluding_placeholders (GtkContainer *container) +{ + GList *children, *l; + gint n_pages; + + children = gtk_container_get_children (container); + + n_pages = 0; + for (l = children; l; l = l->next) + if (!GLADE_IS_PLACEHOLDER (l->data)) + n_pages++; + + g_list_free (children); + + + return n_pages; +} + +static void +selection_changed_cb (GladeProject *project, + GladeWidget *gwidget) +{ + GList *list; + GtkWidget *page, *sel_widget; + GtkContainer *container; + GList *children, *l; + gint index; + + list = glade_project_selection_get (project); + if (!list || g_list_length (list) != 1) + return; + + sel_widget = list->data; + + container = GTK_CONTAINER (glade_widget_get_object (gwidget)); + + if (!GTK_IS_WIDGET (sel_widget) || + !gtk_widget_is_ancestor (sel_widget, GTK_WIDGET (container))) + return; + + children = gtk_container_get_children (container); + for (l = children; l; l = l->next) { + page = l->data; + if (sel_widget == page || gtk_widget_is_ancestor (sel_widget, page)) { + hdy_carousel_scroll_to (HDY_CAROUSEL (container), page); + index = glade_hdy_get_child_index (container, page); + glade_widget_property_set (gwidget, "page", index); + break; + } + } + g_list_free (children); +} + +static void +project_changed_cb (GladeWidget *gwidget, + GParamSpec *pspec, + gpointer user_data) +{ + GladeProject *project, *old_project; + + project = glade_widget_get_project (gwidget); + old_project = g_object_get_data (G_OBJECT (gwidget), "carousel-project-ptr"); + + if (old_project) + g_signal_handlers_disconnect_by_func (G_OBJECT (old_project), + G_CALLBACK (selection_changed_cb), + gwidget); + + if (project) + g_signal_connect (G_OBJECT (project), "selection-changed", + G_CALLBACK (selection_changed_cb), gwidget); + + g_object_set_data (G_OBJECT (gwidget), "carousel-project-ptr", project); +} + +static void +position_changed_cb (HdyCarousel *carousel, + GParamSpec *pspec, + GladeWidget *gwidget) +{ + gint old_page, new_page; + + glade_widget_property_get (gwidget, "page", &old_page); + new_page = hdy_carousel_get_page (carousel); + + if (old_page == new_page || hdy_carousel_is_transient (carousel)) + return; + + glade_widget_property_set (gwidget, "page", new_page); +} + +void +glade_hdy_carousel_post_create (GladeWidgetAdaptor *adaptor, + GObject *container, + GladeCreateReason reason) +{ + GladeWidget *gwidget = glade_widget_get_from_gobject (container); + + if (reason == GLADE_CREATE_USER) + gtk_container_add (GTK_CONTAINER (container), glade_placeholder_new ()); + + g_signal_connect (G_OBJECT (gwidget), "notify::project", + G_CALLBACK (project_changed_cb), NULL); + + project_changed_cb (gwidget, NULL, NULL); + + g_signal_connect (G_OBJECT (container), "notify::position", + G_CALLBACK (position_changed_cb), gwidget); +} + +void +glade_hdy_carousel_child_action_activate (GladeWidgetAdaptor *adaptor, + GObject *container, + GObject *object, + const gchar *action_path) +{ + if (!strcmp (action_path, "insert_page_after") || + !strcmp (action_path, "insert_page_before")) { + GladeWidget *parent; + GladeProperty *property; + GtkWidget *placeholder; + gint pages, index; + + parent = glade_widget_get_from_gobject (container); + glade_widget_property_get (parent, "pages", &pages); + + glade_command_push_group (_("Insert placeholder to %s"), + glade_widget_get_name (parent)); + + index = glade_hdy_get_child_index (GTK_CONTAINER (container), GTK_WIDGET (object)); + if (!strcmp (action_path, "insert_page_after")) + index++; + + placeholder = glade_placeholder_new (); + + hdy_carousel_insert (HDY_CAROUSEL (container), placeholder, index); + hdy_carousel_scroll_to (HDY_CAROUSEL (container), placeholder); + + glade_hdy_sync_child_positions (GTK_CONTAINER (container)); + + property = glade_widget_get_property (parent, "pages"); + glade_command_set_property (property, pages + 1); + + property = glade_widget_get_property (parent, "page"); + glade_command_set_property (property, index); + + glade_command_pop_group (); + } else if (strcmp (action_path, "remove_page") == 0) { + GladeWidget *parent; + GladeProperty *property; + gint pages, position; + + parent = glade_widget_get_from_gobject (container); + glade_widget_property_get (parent, "pages", &pages); + + glade_command_push_group (_("Remove placeholder from %s"), + glade_widget_get_name (parent)); + + g_assert (GLADE_IS_PLACEHOLDER (object)); + gtk_container_remove (GTK_CONTAINER (container), GTK_WIDGET (object)); + + glade_hdy_sync_child_positions (GTK_CONTAINER (container)); + + property = glade_widget_get_property (parent, "pages"); + glade_command_set_property (property, pages - 1); + + glade_widget_property_get (parent, "page", &position); + property = glade_widget_get_property (parent, "page"); + glade_command_set_property (property, position); + + glade_command_pop_group (); + } else + GWA_GET_CLASS (GTK_TYPE_CONTAINER)->child_action_activate (adaptor, + container, + object, + action_path); +} + +static void +set_n_pages (GObject *container, + const GValue *value) +{ + GladeWidget *gbox; + GtkWidget *child; + gint old_size, new_size, i, page; + + new_size = g_value_get_int (value); + old_size = hdy_carousel_get_n_pages (HDY_CAROUSEL (container)); + + if (old_size == new_size) + return; + + for (i = old_size; i < new_size; i++) + gtk_container_add (GTK_CONTAINER (container), glade_placeholder_new ()); + + for (i = old_size; i > 0; i--) { + if (old_size <= new_size) + break; + child = glade_hdy_get_nth_child (GTK_CONTAINER (container), i - 1); + if (GLADE_IS_PLACEHOLDER (child)) { + gtk_container_remove (GTK_CONTAINER (container), child); + old_size--; + } + } + + gbox = glade_widget_get_from_gobject (container); + glade_widget_property_get (gbox, "page", &page); + glade_widget_property_set (gbox, "page", page); +} + +static void +set_page (GObject *object, + const GValue *value) +{ + gint new_page; + GtkWidget *child; + + new_page = g_value_get_int (value); + child = glade_hdy_get_nth_child (GTK_CONTAINER (object), new_page); + + if (child) + hdy_carousel_scroll_to (HDY_CAROUSEL (object), child); +} + +void +glade_hdy_carousel_set_property (GladeWidgetAdaptor *adaptor, + GObject *object, + const gchar *id, + const GValue *value) +{ + if (!strcmp (id, "pages")) + set_n_pages (object, value); + else if (!strcmp (id, "page")) + set_page (object, value); + else { + GWA_GET_CLASS (GTK_TYPE_CONTAINER)->set_property (adaptor, object, id, value); + } +} + +void +glade_hdy_carousel_get_property (GladeWidgetAdaptor *adaptor, + GObject *object, + const gchar *id, + GValue *value) +{ + if (!strcmp (id, "pages")) { + g_value_reset (value); + g_value_set_int (value, hdy_carousel_get_n_pages (HDY_CAROUSEL (object))); + } else if (!strcmp (id, "page")) { + g_value_reset (value); + g_value_set_int (value, hdy_carousel_get_page (HDY_CAROUSEL (object))); + } else { + GWA_GET_CLASS (GTK_TYPE_CONTAINER)->get_property (adaptor, object, id, value); + } +} + +static gboolean +glade_hdy_carousel_verify_n_pages (GObject *object, + const GValue *value) +{ + gint new_size, old_size; + + new_size = g_value_get_int (value); + old_size = get_n_pages_excluding_placeholders (GTK_CONTAINER (object)); + + return old_size <= new_size; +} + +static gboolean +glade_hdy_carousel_verify_page (GObject *object, + const GValue *value) +{ + gint page, pages; + + page = g_value_get_int (value); + pages = hdy_carousel_get_n_pages (HDY_CAROUSEL (object)); + + return 0 <= page && page < pages; +} + +gboolean +glade_hdy_carousel_verify_property (GladeWidgetAdaptor *adaptor, + GObject *object, + const gchar *id, + const GValue *value) +{ + if (!strcmp (id, "pages")) + return glade_hdy_carousel_verify_n_pages (object, value); + else if (!strcmp (id, "page")) + return glade_hdy_carousel_verify_page (object, value); + else if (GWA_GET_CLASS (GTK_TYPE_CONTAINER)->verify_property) + return GWA_GET_CLASS (GTK_TYPE_CONTAINER)->verify_property (adaptor, object, + id, value); + + return TRUE; +} + +void +glade_hdy_carousel_add_child (GladeWidgetAdaptor *adaptor, + GObject *container, + GObject *child) +{ + GladeWidget *gbox, *gchild; + gint pages, page; + + if (!glade_widget_superuser () && !GLADE_IS_PLACEHOLDER (child)) { + GList *l, *children; + + children = gtk_container_get_children (GTK_CONTAINER (container)); + + for (l = g_list_last (children); l; l = l->prev) { + GtkWidget *widget = l->data; + + if (GLADE_IS_PLACEHOLDER (widget)) { + gtk_container_remove (GTK_CONTAINER (container), widget); + break; + } + } + + g_list_free (children); + } + + gtk_container_add (GTK_CONTAINER (container), GTK_WIDGET (child)); + + gchild = glade_widget_get_from_gobject (child); + if (gchild) + glade_widget_set_pack_action_visible (gchild, "remove_page", FALSE); + + glade_hdy_sync_child_positions (GTK_CONTAINER (container)); + + gbox = glade_widget_get_from_gobject (container); + glade_widget_property_get (gbox, "pages", &pages); + glade_widget_property_set (gbox, "pages", pages); + glade_widget_property_get (gbox, "page", &page); + glade_widget_property_set (gbox, "page", page); +} + +void +glade_hdy_carousel_remove_child (GladeWidgetAdaptor *adaptor, + GObject *container, + GObject *child) +{ + GladeWidget *gbox; + gint pages, page; + + gtk_container_remove (GTK_CONTAINER (container), GTK_WIDGET (child)); + + glade_hdy_sync_child_positions (GTK_CONTAINER (container)); + + gbox = glade_widget_get_from_gobject (container); + glade_widget_property_get (gbox, "pages", &pages); + glade_widget_property_set (gbox, "pages", pages); + glade_widget_property_get (gbox, "page", &page); + glade_widget_property_set (gbox, "page", page); +} + +void +glade_hdy_carousel_replace_child (GladeWidgetAdaptor *adaptor, + GObject *container, + GObject *current, + GObject *new_widget) +{ + GladeWidget *gbox, *gchild; + gint pages, page, index; + + index = glade_hdy_get_child_index (GTK_CONTAINER (container), GTK_WIDGET (current)); + gtk_container_remove (GTK_CONTAINER (container), GTK_WIDGET (current)); + hdy_carousel_insert (HDY_CAROUSEL (container), GTK_WIDGET (new_widget), + index); + hdy_carousel_scroll_to_full (HDY_CAROUSEL (container), + GTK_WIDGET (new_widget), 0); + + glade_hdy_sync_child_positions (GTK_CONTAINER (container)); + + gchild = glade_widget_get_from_gobject (new_widget); + if (gchild) + glade_widget_set_pack_action_visible (gchild, "remove_page", FALSE); + + /* NOTE: make sure to sync this at the end because new_widget could be + * a placeholder and syncing these properties could destroy it. + */ + gbox = glade_widget_get_from_gobject (container); + glade_widget_property_get (gbox, "pages", &pages); + glade_widget_property_set (gbox, "pages", pages); + glade_widget_property_get (gbox, "page", &page); + glade_widget_property_set (gbox, "page", page); +} + +void +glade_hdy_carousel_get_child_property (GladeWidgetAdaptor *adaptor, + GObject *container, + GObject *child, + const gchar *property_name, + GValue *value) +{ + if (strcmp (property_name, "position") == 0) + g_value_set_int (value, glade_hdy_get_child_index (GTK_CONTAINER (container), + GTK_WIDGET (child))); + else + GWA_GET_CLASS (GTK_TYPE_CONTAINER)->child_get_property (adaptor, + container, + child, + property_name, + value); +} + +void +glade_hdy_carousel_set_child_property (GladeWidgetAdaptor *adaptor, + GObject *container, + GObject *child, + const gchar *property_name, + GValue *value) +{ + if (strcmp (property_name, "position") == 0) { + glade_hdy_reorder_child (GTK_CONTAINER (container), + GTK_WIDGET (child), + g_value_get_int (value)); + + glade_hdy_sync_child_positions (GTK_CONTAINER (container)); + } else { + GWA_GET_CLASS (GTK_TYPE_CONTAINER)->child_set_property (adaptor, + container, + child, + property_name, + value); + } +} |