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demo: Make words listview load async

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And add an "Open" button (why are filechooser buttons such a catastrophe
that I can't make them smaller?).
This commit is contained in:
Benjamin Otte 2020-06-30 23:31:49 +02:00
parent 66fa9380b5
commit ac524bb13a
1 changed files with 115 additions and 8 deletions
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123
demos/gtk-demo/listview_words.c
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@ -45,30 +45,134 @@ update_title_cb (GtkFilterListModel *model)
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);
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));
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);
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, 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;
GtkWidget *header, *listview, *sw, *vbox, *search_entry, *open_button;
GtkFilterListModel *filter_model;
GtkStringList *stringlist;
GtkFilter *filter;
char **words;
char *usr_dict_words;
GtkExpression *expression;
GFile *file;
if (g_file_get_contents ("/usr/share/dict/words", &usr_dict_words, NULL, NULL))
file = g_file_new_for_path ("/usr/share/dict/words");
if (g_file_query_exists (file, NULL))
{
words = g_strsplit (usr_dict_words, "\n", -1);
g_free (usr_dict_words);
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);
}
stringlist = gtk_string_list_new ((const char **) words);
g_strfreev (words);
filter = gtk_string_filter_new ();
expression = gtk_property_expression_new (GTK_TYPE_STRING_OBJECT, NULL, "string");
@ -81,6 +185,9 @@ do_listview_words (GtkWidget *do_widget)
gtk_window_set_title (GTK_WINDOW (window), "Words");
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),