257 lines
8.2 KiB
C
257 lines
8.2 KiB
C
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/* Lists/Words
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* #Keywords: GtkListView, GtkFilterListModel, GtkInscription
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*
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* This demo shows filtering a long list - of words.
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*
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* You should have the file `/usr/share/dict/words` installed for
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* this demo to work.
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*/
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#include <gtk/gtk.h>
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static GtkWidget *window = NULL;
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static GtkWidget *progress;
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const char *factory_text =
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"<?xml version='1.0' encoding='UTF-8'?>\n"
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"<interface>\n"
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" <template class='GtkListItem'>\n"
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" <property name='child'>\n"
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" <object class='GtkInscription'>\n"
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" <property name='xalign'>0</property>\n"
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" <binding name='text'>\n"
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" <lookup name='string' type='GtkStringObject'>\n"
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" <lookup name='item'>GtkListItem</lookup>\n"
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" </lookup>\n"
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" </binding>\n"
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" </object>\n"
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" </property>\n"
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" </template>\n"
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"</interface>\n";
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static void
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update_title_cb (GtkFilterListModel *model)
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{
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guint total;
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char *title;
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guint pending;
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total = g_list_model_get_n_items (gtk_filter_list_model_get_model (model));
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pending = gtk_filter_list_model_get_pending (model);
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title = g_strdup_printf ("%u lines", g_list_model_get_n_items (G_LIST_MODEL (model)));
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gtk_widget_set_visible (progress, pending != 0);
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gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (progress), total > 0 ? (total - pending) / (double) total : 0.);
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gtk_window_set_title (GTK_WINDOW (window), title);
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g_free (title);
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}
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static void
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read_lines_cb (GObject *object,
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GAsyncResult *result,
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gpointer data)
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{
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GBufferedInputStream *stream = G_BUFFERED_INPUT_STREAM (object);
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GtkStringList *stringlist = data;
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GError *error = NULL;
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gsize size;
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GPtrArray *lines;
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gssize n_filled;
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const char *buffer, *newline;
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n_filled = g_buffered_input_stream_fill_finish (stream, result, &error);
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if (n_filled < 0)
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{
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g_print ("Could not read data: %s\n", error->message);
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g_clear_error (&error);
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g_object_unref (stringlist);
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return;
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}
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buffer = g_buffered_input_stream_peek_buffer (stream, &size);
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if (n_filled == 0)
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{
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if (size)
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gtk_string_list_take (stringlist, g_utf8_make_valid (buffer, size));
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g_object_unref (stringlist);
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return;
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}
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lines = NULL;
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while ((newline = memchr (buffer, '\n', size)))
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{
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if (newline > buffer)
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{
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if (lines == NULL)
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lines = g_ptr_array_new_with_free_func (g_free);
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g_ptr_array_add (lines, g_utf8_make_valid (buffer, newline - buffer));
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}
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if (g_input_stream_skip (G_INPUT_STREAM (stream), newline - buffer + 1, NULL, &error) < 0)
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{
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g_clear_error (&error);
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break;
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}
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buffer = g_buffered_input_stream_peek_buffer (stream, &size);
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}
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if (lines == NULL)
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{
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g_buffered_input_stream_set_buffer_size (stream, g_buffered_input_stream_get_buffer_size (stream) + 4096);
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}
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else
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{
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g_ptr_array_add (lines, NULL);
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gtk_string_list_splice (stringlist, g_list_model_get_n_items (G_LIST_MODEL (stringlist)), 0, (const char **) lines->pdata);
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g_ptr_array_free (lines, TRUE);
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}
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g_buffered_input_stream_fill_async (stream, -1, G_PRIORITY_HIGH_IDLE, NULL, read_lines_cb, data);
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}
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static void
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file_is_open_cb (GObject *file,
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GAsyncResult *result,
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gpointer data)
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{
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GError *error = NULL;
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GFileInputStream *file_stream;
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GBufferedInputStream *stream;
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file_stream = g_file_read_finish (G_FILE (file), result, &error);
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if (file_stream == NULL)
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{
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g_print ("Could not open file: %s\n", error->message);
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g_error_free (error);
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g_object_unref (data);
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return;
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}
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stream = G_BUFFERED_INPUT_STREAM (g_buffered_input_stream_new (G_INPUT_STREAM (file_stream)));
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g_buffered_input_stream_fill_async (stream, -1, G_PRIORITY_HIGH_IDLE, NULL, read_lines_cb, data);
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g_object_unref (stream);
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}
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static void
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load_file (GtkStringList *list,
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GFile *file)
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{
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gtk_string_list_splice (list, 0, g_list_model_get_n_items (G_LIST_MODEL (list)), NULL);
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g_file_read_async (file, G_PRIORITY_HIGH_IDLE, NULL, file_is_open_cb, g_object_ref (list));
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}
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static void
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open_response_cb (GObject *source,
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GAsyncResult *result,
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void *user_data)
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{
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GtkFileDialog *dialog = GTK_FILE_DIALOG (source);
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GtkStringList *stringlist = GTK_STRING_LIST (user_data);
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GFile *file;
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file = gtk_file_dialog_open_finish (dialog, result, NULL);
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if (file)
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{
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load_file (stringlist, file);
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g_object_unref (file);
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}
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}
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static void
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file_open_cb (GtkWidget *button,
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GtkStringList *stringlist)
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{
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GtkFileDialog *dialog;
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dialog = gtk_file_dialog_new ();
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gtk_file_dialog_open (dialog,
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GTK_WINDOW (gtk_widget_get_root (button)),
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NULL,
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open_response_cb, stringlist);
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g_object_unref (dialog);
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}
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GtkWidget *
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do_listview_words (GtkWidget *do_widget)
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{
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if (window == NULL)
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{
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GtkWidget *header, *listview, *sw, *vbox, *search_entry, *open_button, *overlay;
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GtkFilterListModel *filter_model;
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GtkStringList *stringlist;
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GtkFilter *filter;
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GFile *file;
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file = g_file_new_for_path ("/usr/share/dict/words");
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if (g_file_query_exists (file, NULL))
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{
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stringlist = gtk_string_list_new (NULL);
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load_file (stringlist, file);
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}
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else
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{
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char **words;
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words = g_strsplit ("lorem ipsum dolor sit amet consectetur adipisci elit sed eiusmod tempor incidunt labore et dolore magna aliqua ut enim ad minim veniam quis nostrud exercitation ullamco laboris nisi ut aliquid ex ea commodi consequat", " ", -1);
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stringlist = gtk_string_list_new ((const char **) words);
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g_strfreev (words);
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}
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g_object_unref (file);
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filter = GTK_FILTER (gtk_string_filter_new (gtk_property_expression_new (GTK_TYPE_STRING_OBJECT, NULL, "string")));
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filter_model = gtk_filter_list_model_new (G_LIST_MODEL (stringlist), filter);
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gtk_filter_list_model_set_incremental (filter_model, TRUE);
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window = gtk_window_new ();
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gtk_window_set_default_size (GTK_WINDOW (window), 400, 600);
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header = gtk_header_bar_new ();
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gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
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open_button = gtk_button_new_with_mnemonic ("_Open");
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g_signal_connect (open_button, "clicked", G_CALLBACK (file_open_cb), stringlist);
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gtk_header_bar_pack_start (GTK_HEADER_BAR (header), open_button);
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gtk_window_set_titlebar (GTK_WINDOW (window), header);
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gtk_window_set_display (GTK_WINDOW (window),
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gtk_widget_get_display (do_widget));
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer*)&window);
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vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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gtk_window_set_child (GTK_WINDOW (window), vbox);
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search_entry = gtk_search_entry_new ();
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g_object_bind_property (search_entry, "text", filter, "search", 0);
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gtk_box_append (GTK_BOX (vbox), search_entry);
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overlay = gtk_overlay_new ();
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gtk_box_append (GTK_BOX (vbox), overlay);
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progress = gtk_progress_bar_new ();
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gtk_widget_set_halign (progress, GTK_ALIGN_FILL);
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gtk_widget_set_valign (progress, GTK_ALIGN_START);
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gtk_widget_set_hexpand (progress, TRUE);
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gtk_overlay_add_overlay (GTK_OVERLAY (overlay), progress);
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sw = gtk_scrolled_window_new ();
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gtk_widget_set_vexpand (sw, TRUE);
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gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
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listview = gtk_list_view_new (
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GTK_SELECTION_MODEL (gtk_no_selection_new (G_LIST_MODEL (filter_model))),
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gtk_builder_list_item_factory_new_from_bytes (NULL,
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g_bytes_new_static (factory_text, strlen (factory_text))));
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), listview);
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g_signal_connect (filter_model, "items-changed", G_CALLBACK (update_title_cb), progress);
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g_signal_connect (filter_model, "notify::pending", G_CALLBACK (update_title_cb), progress);
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update_title_cb (filter_model);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_set_visible (window, TRUE);
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else
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gtk_window_destroy (GTK_WINDOW (window));
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return window;
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}
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