mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-16 13:40:31 +00:00
ca9d15df92
This signal is emitted whenever user scrolling hits the overshoot edge in the given direction. May be useful to add "reload" or "load more" behaviors in apps. https://bugzilla.gnome.org/show_bug.cgi?id=738534
130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/* testscrolledge.c
|
|
*
|
|
* Copyright (C) 2014 Matthias Clasen <mclasen@redhat.com>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <gtk/gtk.h>
|
|
|
|
static guint add_rows_id = 0;
|
|
|
|
static void
|
|
populate_list (GtkListBox *list)
|
|
{
|
|
gint i;
|
|
gchar *text;
|
|
GtkWidget *row, *label;
|
|
gint n;
|
|
GList *l;
|
|
|
|
l = gtk_container_get_children (GTK_CONTAINER (list));
|
|
n = g_list_length (l);
|
|
g_list_free (l);
|
|
|
|
for (i = 1; i <= 50; i++)
|
|
{
|
|
row = gtk_list_box_row_new ();
|
|
text = g_strdup_printf ("List row %d", i + n);
|
|
label = gtk_label_new (text);
|
|
g_free (text);
|
|
|
|
g_object_set (label, "margin", 10, NULL);
|
|
gtk_widget_set_halign (label, GTK_ALIGN_START);
|
|
gtk_container_add (GTK_CONTAINER (row), label);
|
|
gtk_widget_show_all (row);
|
|
gtk_container_add (GTK_CONTAINER (list), row);
|
|
}
|
|
}
|
|
|
|
static GtkWidget *popup;
|
|
static GtkWidget *spinner;
|
|
|
|
static gboolean
|
|
add_rows (gpointer data)
|
|
{
|
|
GtkListBox *list = data;
|
|
|
|
gtk_widget_hide (popup);
|
|
gtk_spinner_stop (GTK_SPINNER (spinner));
|
|
|
|
populate_list (list);
|
|
add_rows_id = 0;
|
|
|
|
return G_SOURCE_REMOVE;
|
|
}
|
|
|
|
static void
|
|
edge_overshot (GtkScrolledWindow *sw,
|
|
GtkPositionType pos,
|
|
GtkListBox *list)
|
|
{
|
|
if (pos == GTK_POS_BOTTOM)
|
|
{
|
|
gtk_spinner_start (GTK_SPINNER (spinner));
|
|
gtk_widget_show (popup);
|
|
|
|
if (add_rows_id == 0)
|
|
add_rows_id = g_timeout_add (2000, add_rows, list);
|
|
}
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
GtkWidget *win;
|
|
GtkWidget *sw;
|
|
GtkWidget *list;
|
|
GtkWidget *overlay;
|
|
GtkWidget *label;
|
|
|
|
gtk_init (NULL, NULL);
|
|
|
|
win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
|
|
gtk_window_set_default_size (GTK_WINDOW (win), 600, 400);
|
|
|
|
overlay = gtk_overlay_new ();
|
|
popup = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
|
|
gtk_widget_set_halign (popup, GTK_ALIGN_CENTER);
|
|
gtk_widget_set_valign (popup, GTK_ALIGN_END);
|
|
g_object_set (popup, "margin", 40, NULL);
|
|
label = gtk_label_new ("Getting more rows...");
|
|
spinner = gtk_spinner_new ();
|
|
gtk_widget_show (spinner);
|
|
gtk_widget_show (label);
|
|
gtk_container_add (GTK_CONTAINER (popup), label);
|
|
gtk_container_add (GTK_CONTAINER (popup), spinner);
|
|
|
|
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), popup);
|
|
gtk_widget_set_no_show_all (popup, TRUE);
|
|
|
|
sw = gtk_scrolled_window_new (NULL, NULL);
|
|
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
|
|
list = gtk_list_box_new ();
|
|
gtk_list_box_set_selection_mode (GTK_LIST_BOX (list), GTK_SELECTION_NONE);
|
|
|
|
gtk_container_add (GTK_CONTAINER (win), overlay);
|
|
gtk_container_add (GTK_CONTAINER (overlay), sw);
|
|
gtk_container_add (GTK_CONTAINER (sw), list);
|
|
populate_list (GTK_LIST_BOX (list));
|
|
|
|
g_signal_connect (sw, "edge-overshot", G_CALLBACK (edge_overshot), list);
|
|
|
|
gtk_widget_show_all (win);
|
|
|
|
gtk_main ();
|
|
|
|
return 0;
|
|
}
|