forked from AuroraMiddleware/gtk
c835ae2a02
The thing we're actually doing is create and maintain a widget for every row. That's it. Also add a testcase using this. The testcase quickly allocates too many rows though and then becomes unresponsive though. You have been warned.
346 lines
9.9 KiB
C
346 lines
9.9 KiB
C
#include <gtk/gtk.h>
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#define ROWS 30
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GSList *pending = NULL;
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guint active = 0;
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static void
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got_files (GObject *enumerate,
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GAsyncResult *res,
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gpointer store);
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static gboolean
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start_enumerate (GListStore *store)
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{
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GFileEnumerator *enumerate;
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GFile *file = g_object_get_data (G_OBJECT (store), "file");
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GError *error = NULL;
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enumerate = g_file_enumerate_children (file,
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G_FILE_ATTRIBUTE_STANDARD_TYPE
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"," G_FILE_ATTRIBUTE_STANDARD_ICON
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"," G_FILE_ATTRIBUTE_STANDARD_NAME,
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0,
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NULL,
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&error);
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if (enumerate == NULL)
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{
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if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_TOO_MANY_OPEN_FILES) && active)
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{
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g_clear_error (&error);
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pending = g_slist_prepend (pending, g_object_ref (store));
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return TRUE;
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}
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g_clear_error (&error);
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g_object_unref (store);
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return FALSE;
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}
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if (active > 20)
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{
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g_object_unref (enumerate);
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pending = g_slist_prepend (pending, g_object_ref (store));
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return TRUE;
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}
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active++;
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g_file_enumerator_next_files_async (enumerate,
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g_file_is_native (file) ? 5000 : 100,
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G_PRIORITY_DEFAULT_IDLE,
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NULL,
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got_files,
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g_object_ref (store));
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g_object_unref (enumerate);
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return TRUE;
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}
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static void
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got_files (GObject *enumerate,
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GAsyncResult *res,
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gpointer store)
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{
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GList *l, *files;
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GFile *file = g_object_get_data (store, "file");
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GPtrArray *array;
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files = g_file_enumerator_next_files_finish (G_FILE_ENUMERATOR (enumerate), res, NULL);
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if (files == NULL)
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{
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g_object_unref (store);
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if (pending)
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{
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GListStore *next = pending->data;
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pending = g_slist_remove (pending, next);
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start_enumerate (next);
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}
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active--;
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return;
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}
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array = g_ptr_array_new ();
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g_ptr_array_new_with_free_func (g_object_unref);
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for (l = files; l; l = l->next)
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{
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GFileInfo *info = l->data;
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GFile *child;
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child = g_file_get_child (file, g_file_info_get_name (info));
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g_object_set_data_full (G_OBJECT (info), "file", child, g_object_unref);
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g_ptr_array_add (array, info);
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}
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g_list_free (files);
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g_list_store_splice (store, g_list_model_get_n_items (store), 0, array->pdata, array->len);
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g_ptr_array_unref (array);
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g_file_enumerator_next_files_async (G_FILE_ENUMERATOR (enumerate),
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g_file_is_native (file) ? 5000 : 100,
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G_PRIORITY_DEFAULT_IDLE,
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NULL,
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got_files,
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store);
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}
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static char *
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get_file_path (GFileInfo *info)
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{
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GFile *file;
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file = g_object_get_data (G_OBJECT (info), "file");
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return g_file_get_path (file);
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}
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static GListModel *
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create_list_model_for_directory (gpointer file)
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{
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GtkSortListModel *sort;
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GListStore *store;
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GtkSorter *sorter;
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if (g_file_query_file_type (file, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, NULL) != G_FILE_TYPE_DIRECTORY)
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return NULL;
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store = g_list_store_new (G_TYPE_FILE_INFO);
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g_object_set_data_full (G_OBJECT (store), "file", g_object_ref (file), g_object_unref);
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if (!start_enumerate (store))
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return NULL;
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sorter = gtk_string_sorter_new (gtk_cclosure_expression_new (G_TYPE_STRING, NULL, 0, NULL, (GCallback) get_file_path, NULL, NULL));
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sort = gtk_sort_list_model_new (G_LIST_MODEL (store), sorter);
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g_object_unref (sorter);
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g_object_unref (store);
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return G_LIST_MODEL (sort);
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}
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static GtkWidget *
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create_widget (gpointer unused)
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{
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return gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
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}
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static void
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bind_widget (GtkWidget *box,
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gpointer item,
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gpointer unused)
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{
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GtkWidget *child;
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GFileInfo *info;
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GFile *file;
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guint depth;
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GIcon *icon;
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while (gtk_widget_get_first_child (box))
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gtk_box_remove (GTK_BOX (box), gtk_widget_get_first_child (box));
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depth = gtk_tree_list_row_get_depth (item);
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if (depth > 0)
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{
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child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
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gtk_widget_set_size_request (child, 16 * depth, 0);
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gtk_box_append (GTK_BOX (box), child);
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}
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if (gtk_tree_list_row_is_expandable (item))
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{
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GtkWidget *arrow;
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child = g_object_new (GTK_TYPE_TOGGLE_BUTTON, "css-name", "expander-widget", NULL);
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gtk_button_set_has_frame (GTK_BUTTON (child), FALSE);
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g_object_bind_property (item, "expanded", child, "active", G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
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g_object_set_data_full (G_OBJECT (child), "make-sure-its-not-unreffed", g_object_ref (item), g_object_unref);
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arrow = g_object_new (GTK_TYPE_SPINNER, "css-name", "expander", NULL);
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g_object_bind_property (item, "expanded", arrow, "spinning", G_BINDING_SYNC_CREATE);
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gtk_button_set_child (GTK_BUTTON (child), arrow);
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}
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else
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{
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child = gtk_image_new (); /* empty whatever */
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}
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gtk_box_append (GTK_BOX (box), child);
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info = gtk_tree_list_row_get_item (item);
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icon = g_file_info_get_icon (info);
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if (icon)
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{
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child = gtk_image_new_from_gicon (icon);
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gtk_box_append (GTK_BOX (box), child);
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}
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file = g_object_get_data (G_OBJECT (info), "file");
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child = gtk_label_new (g_file_get_basename (file));
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g_object_unref (info);
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gtk_box_append (GTK_BOX (box), child);
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}
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static GListModel *
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create_list_model_for_file_info (gpointer file_info,
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gpointer unused)
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{
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GFile *file = g_object_get_data (file_info, "file");
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if (file == NULL)
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return NULL;
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return create_list_model_for_directory (file);
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}
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static gboolean
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update_statusbar (GtkStatusbar *statusbar)
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{
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GListModel *model = g_object_get_data (G_OBJECT (statusbar), "model");
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GString *string = g_string_new (NULL);
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guint n;
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gboolean result = G_SOURCE_REMOVE;
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gtk_statusbar_remove_all (statusbar, 0);
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n = g_list_model_get_n_items (model);
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g_string_append_printf (string, "%u", n);
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if (GTK_IS_FILTER_LIST_MODEL (model))
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{
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guint n_unfiltered = g_list_model_get_n_items (gtk_filter_list_model_get_model (GTK_FILTER_LIST_MODEL (model)));
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if (n != n_unfiltered)
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g_string_append_printf (string, "/%u", n_unfiltered);
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}
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g_string_append (string, " items");
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if (pending || active)
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{
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g_string_append_printf (string, " (%u directories remaining)", active + g_slist_length (pending));
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result = G_SOURCE_CONTINUE;
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}
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gtk_statusbar_push (statusbar, 0, string->str);
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g_free (string->str);
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return result;
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}
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static gboolean
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match_file (gpointer item, gpointer data)
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{
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GtkWidget *search_entry = data;
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GFileInfo *info = gtk_tree_list_row_get_item (item);
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GFile *file = g_object_get_data (G_OBJECT (info), "file");
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char *path;
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gboolean result;
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path = g_file_get_path (file);
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result = strstr (path, gtk_editable_get_text (GTK_EDITABLE (search_entry))) != NULL;
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g_object_unref (info);
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g_free (path);
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return result;
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}
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static void
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search_changed_cb (GtkSearchEntry *entry,
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GtkFilter *custom_filter)
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{
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gtk_filter_changed (custom_filter, GTK_FILTER_CHANGE_DIFFERENT);
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}
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int
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main (int argc, char *argv[])
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{
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GtkWidget *win, *vbox, *sw, *listview, *search_entry, *statusbar;
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GListModel *dirmodel;
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GtkTreeListModel *tree;
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GtkFilterListModel *filter;
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GtkFilter *custom_filter;
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GFile *root;
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GListModel *toplevels;
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gtk_init ();
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win = gtk_window_new ();
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gtk_window_set_default_size (GTK_WINDOW (win), 400, 600);
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vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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gtk_window_set_child (GTK_WINDOW (win), vbox);
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search_entry = gtk_search_entry_new ();
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gtk_box_append (GTK_BOX (vbox), search_entry);
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sw = gtk_scrolled_window_new (NULL, NULL);
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gtk_widget_set_vexpand (sw, TRUE);
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gtk_search_entry_set_key_capture_widget (GTK_SEARCH_ENTRY (search_entry), sw);
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gtk_box_append (GTK_BOX (vbox), sw);
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listview = gtk_list_view_new ();
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gtk_list_view_set_functions (GTK_LIST_VIEW (listview),
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create_widget,
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bind_widget,
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NULL, NULL);
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), listview);
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if (argc > 1)
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root = g_file_new_for_commandline_arg (argv[1]);
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else
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root = g_file_new_for_path (g_get_current_dir ());
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dirmodel = create_list_model_for_directory (root);
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tree = gtk_tree_list_model_new (FALSE,
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dirmodel,
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TRUE,
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create_list_model_for_file_info,
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NULL, NULL);
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g_object_unref (dirmodel);
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g_object_unref (root);
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custom_filter = gtk_custom_filter_new (match_file, search_entry, NULL);
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filter = gtk_filter_list_model_new (G_LIST_MODEL (tree), custom_filter);
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g_signal_connect (search_entry, "search-changed", G_CALLBACK (search_changed_cb), custom_filter);
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g_object_unref (custom_filter);
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gtk_list_view_set_model (GTK_LIST_VIEW (listview), G_LIST_MODEL (filter));
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statusbar = gtk_statusbar_new ();
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gtk_widget_add_tick_callback (statusbar, (GtkTickCallback) update_statusbar, NULL, NULL);
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g_object_set_data (G_OBJECT (statusbar), "model", filter);
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g_signal_connect_swapped (filter, "items-changed", G_CALLBACK (update_statusbar), statusbar);
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update_statusbar (GTK_STATUSBAR (statusbar));
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gtk_box_append (GTK_BOX (vbox), statusbar);
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g_object_unref (tree);
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g_object_unref (filter);
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gtk_widget_show (win);
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toplevels = gtk_window_get_toplevels ();
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while (g_list_model_get_n_items (toplevels))
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g_main_context_iteration (NULL, TRUE);
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return 0;
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}
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