mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-28 22:41:43 +00:00
d732c869c2
Add the names of the main widgets as keywords to our demos, but also things like "game". This helps finding relevant demos in our growing list. You can now for example type "label", and find the "error states" and "links" demos showing GtkLabel features.
240 lines
7.7 KiB
C
240 lines
7.7 KiB
C
/* Lists/Words
|
|
* #Keywords: GtkListView, GtkFilterListModel
|
|
*
|
|
* This demo shows filtering a long list - of words.
|
|
*
|
|
* You should have the file `/usr/share/dict/words` installed for
|
|
* this demo to work.
|
|
*/
|
|
|
|
#include <gtk/gtk.h>
|
|
|
|
static GtkWidget *window = NULL;
|
|
static GtkWidget *progress;
|
|
|
|
const char *factory_text =
|
|
"<?xml version='1.0' encoding='UTF-8'?>\n"
|
|
"<interface>\n"
|
|
" <template class='GtkListItem'>\n"
|
|
" <property name='child'>\n"
|
|
" <object class='GtkLabel'>\n"
|
|
" <property name='ellipsize'>end</property>\n"
|
|
" <property name='xalign'>0</property>\n"
|
|
" <binding name='label'>\n"
|
|
" <lookup name='string' type='GtkStringObject'>\n"
|
|
" <lookup name='item'>GtkListItem</lookup>\n"
|
|
" </lookup>\n"
|
|
" </binding>\n"
|
|
" </object>\n"
|
|
" </property>\n"
|
|
" </template>\n"
|
|
"</interface>\n";
|
|
|
|
static void
|
|
update_title_cb (GtkFilterListModel *model)
|
|
{
|
|
guint total;
|
|
char *title;
|
|
guint pending;
|
|
|
|
total = g_list_model_get_n_items (gtk_filter_list_model_get_model (model));
|
|
pending = gtk_filter_list_model_get_pending (model);
|
|
|
|
title = g_strdup_printf ("%u lines", g_list_model_get_n_items (G_LIST_MODEL (model)));
|
|
|
|
gtk_widget_set_visible (progress, pending != 0);
|
|
gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (progress), (total - pending) / (double) total);
|
|
gtk_window_set_title (GTK_WINDOW (window), title);
|
|
g_free (title);
|
|
}
|
|
|
|
static void
|
|
read_lines_cb (GObject *object,
|
|
GAsyncResult *result,
|
|
gpointer data)
|
|
{
|
|
GBufferedInputStream *stream = G_BUFFERED_INPUT_STREAM (object);
|
|
GtkStringList *stringlist = data;
|
|
GError *error = NULL;
|
|
gsize size;
|
|
GPtrArray *lines;
|
|
gssize n_filled;
|
|
const char *buffer, *newline;
|
|
|
|
n_filled = g_buffered_input_stream_fill_finish (stream, result, &error);
|
|
if (n_filled < 0)
|
|
{
|
|
g_print ("Could not read data: %s\n", error->message);
|
|
g_clear_error (&error);
|
|
g_object_unref (stringlist);
|
|
return;
|
|
}
|
|
|
|
buffer = g_buffered_input_stream_peek_buffer (stream, &size);
|
|
|
|
if (n_filled == 0)
|
|
{
|
|
if (size)
|
|
gtk_string_list_take (stringlist, g_utf8_make_valid (buffer, size));
|
|
g_object_unref (stringlist);
|
|
return;
|
|
}
|
|
|
|
lines = NULL;
|
|
while ((newline = memchr (buffer, '\n', size)))
|
|
{
|
|
if (newline > buffer)
|
|
{
|
|
if (lines == NULL)
|
|
lines = g_ptr_array_new_with_free_func (g_free);
|
|
g_ptr_array_add (lines, g_utf8_make_valid (buffer, newline - buffer));
|
|
}
|
|
if (g_input_stream_skip (G_INPUT_STREAM (stream), newline - buffer + 1, NULL, &error) < 0)
|
|
{
|
|
g_clear_error (&error);
|
|
break;
|
|
}
|
|
buffer = g_buffered_input_stream_peek_buffer (stream, &size);
|
|
}
|
|
if (lines == NULL)
|
|
{
|
|
g_buffered_input_stream_set_buffer_size (stream, g_buffered_input_stream_get_buffer_size (stream) + 4096);
|
|
}
|
|
else
|
|
{
|
|
g_ptr_array_add (lines, NULL);
|
|
gtk_string_list_splice (stringlist, g_list_model_get_n_items (G_LIST_MODEL (stringlist)), 0, (const char **) lines->pdata);
|
|
g_ptr_array_free (lines, TRUE);
|
|
}
|
|
|
|
g_buffered_input_stream_fill_async (stream, -1, G_PRIORITY_HIGH_IDLE, NULL, read_lines_cb, data);
|
|
}
|
|
|
|
static void
|
|
file_is_open_cb (GObject *file,
|
|
GAsyncResult *result,
|
|
gpointer data)
|
|
{
|
|
GError *error = NULL;
|
|
GFileInputStream *file_stream;
|
|
GBufferedInputStream *stream;
|
|
|
|
file_stream = g_file_read_finish (G_FILE (file), result, &error);
|
|
if (file_stream == NULL)
|
|
{
|
|
g_print ("Could not open file: %s\n", error->message);
|
|
g_error_free (error);
|
|
g_object_unref (data);
|
|
return;
|
|
}
|
|
|
|
stream = G_BUFFERED_INPUT_STREAM (g_buffered_input_stream_new (G_INPUT_STREAM (file_stream)));
|
|
g_buffered_input_stream_fill_async (stream, -1, G_PRIORITY_HIGH_IDLE, NULL, read_lines_cb, data);
|
|
g_object_unref (stream);
|
|
}
|
|
|
|
static void
|
|
load_file (GtkStringList *list,
|
|
GFile *file)
|
|
{
|
|
gtk_string_list_splice (list, 0, g_list_model_get_n_items (G_LIST_MODEL (list)), NULL);
|
|
g_file_read_async (file, G_PRIORITY_HIGH_IDLE, NULL, file_is_open_cb, g_object_ref (list));
|
|
}
|
|
|
|
static void
|
|
file_selected_cb (GtkWidget *button,
|
|
GtkStringList *stringlist)
|
|
{
|
|
GFile *file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (button));
|
|
|
|
if (file)
|
|
{
|
|
load_file (stringlist, file);
|
|
g_object_unref (file);
|
|
}
|
|
}
|
|
|
|
GtkWidget *
|
|
do_listview_words (GtkWidget *do_widget)
|
|
{
|
|
if (window == NULL)
|
|
{
|
|
GtkWidget *header, *listview, *sw, *vbox, *search_entry, *open_button, *overlay;
|
|
GtkFilterListModel *filter_model;
|
|
GtkStringList *stringlist;
|
|
GtkFilter *filter;
|
|
GFile *file;
|
|
|
|
file = g_file_new_for_path ("/usr/share/dict/words");
|
|
if (g_file_query_exists (file, NULL))
|
|
{
|
|
stringlist = gtk_string_list_new (NULL);
|
|
load_file (stringlist, file);
|
|
}
|
|
else
|
|
{
|
|
char **words;
|
|
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);
|
|
stringlist = gtk_string_list_new ((const char **) words);
|
|
g_strfreev (words);
|
|
}
|
|
g_object_unref (file);
|
|
|
|
filter = GTK_FILTER (gtk_string_filter_new (gtk_property_expression_new (GTK_TYPE_STRING_OBJECT, NULL, "string")));
|
|
filter_model = gtk_filter_list_model_new (G_LIST_MODEL (stringlist), filter);
|
|
gtk_filter_list_model_set_incremental (filter_model, TRUE);
|
|
|
|
window = gtk_window_new ();
|
|
gtk_window_set_default_size (GTK_WINDOW (window), 400, 600);
|
|
|
|
header = gtk_header_bar_new ();
|
|
gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
|
|
open_button = gtk_file_chooser_button_new ("_Open", GTK_FILE_CHOOSER_ACTION_OPEN);
|
|
g_signal_connect (open_button, "file-set", G_CALLBACK (file_selected_cb), stringlist);
|
|
gtk_header_bar_pack_start (GTK_HEADER_BAR (header), open_button);
|
|
gtk_window_set_titlebar (GTK_WINDOW (window), header);
|
|
|
|
gtk_window_set_display (GTK_WINDOW (window),
|
|
gtk_widget_get_display (do_widget));
|
|
g_object_add_weak_pointer (G_OBJECT (window), (gpointer*)&window);
|
|
|
|
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
|
|
gtk_window_set_child (GTK_WINDOW (window), vbox);
|
|
|
|
search_entry = gtk_search_entry_new ();
|
|
g_object_bind_property (search_entry, "text", filter, "search", 0);
|
|
gtk_box_append (GTK_BOX (vbox), search_entry);
|
|
|
|
overlay = gtk_overlay_new ();
|
|
gtk_box_append (GTK_BOX (vbox), overlay);
|
|
|
|
progress = gtk_progress_bar_new ();
|
|
gtk_widget_set_halign (progress, GTK_ALIGN_FILL);
|
|
gtk_widget_set_valign (progress, GTK_ALIGN_START);
|
|
gtk_widget_set_hexpand (progress, TRUE);
|
|
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), progress);
|
|
|
|
sw = gtk_scrolled_window_new ();
|
|
gtk_widget_set_vexpand (sw, TRUE);
|
|
gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
|
|
|
|
listview = gtk_list_view_new (
|
|
GTK_SELECTION_MODEL (gtk_no_selection_new (G_LIST_MODEL (filter_model))),
|
|
gtk_builder_list_item_factory_new_from_bytes (NULL,
|
|
g_bytes_new_static (factory_text, strlen (factory_text))));
|
|
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), listview);
|
|
|
|
g_signal_connect (filter_model, "items-changed", G_CALLBACK (update_title_cb), progress);
|
|
g_signal_connect (filter_model, "notify::pending", G_CALLBACK (update_title_cb), progress);
|
|
update_title_cb (filter_model);
|
|
|
|
}
|
|
|
|
if (!gtk_widget_get_visible (window))
|
|
gtk_widget_show (window);
|
|
else
|
|
gtk_window_destroy (GTK_WINDOW (window));
|
|
|
|
return window;
|
|
}
|