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/* 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_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);
}
}
static void
edge_reached (GtkScrolledWindow *sw,
GtkPositionType pos,
GtkListBox *list)
{
g_print ("Reached the edge at pos %d!\n", pos);
}
int
main (int argc, char *argv[])
{
GtkWidget *win;
GtkWidget *sw;
GtkWidget *list;
GtkWidget *overlay;
GtkWidget *label;
gtk_init ();
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_container_add (GTK_CONTAINER (popup), label);
gtk_container_add (GTK_CONTAINER (popup), spinner);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), popup);
gtk_widget_hide (popup);
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);
g_signal_connect (sw, "edge-reached", G_CALLBACK (edge_reached), list);
gtk_widget_show (win);
gtk_main ();
return 0;
}
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