gtk2/tests/testscrolledge.c
Matthias Clasen 386b63b85d scrolledwindow: Don't take adjustments in new()
In 99.9% of all cases, these are just NULL, NULL.
So just do away with these arguments, people can
use the setters for the rare cases where they want
the scrolled window to use a different adjustment.
2020-06-24 11:25:09 -04:00

143 lines
3.9 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;
GtkWidget *child;
for (child = gtk_widget_get_first_child (GTK_WIDGET (list)), n = 0;
child != NULL;
child = gtk_widget_get_next_sibling (child), n++) ;
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);
gtk_widget_set_margin_start (label, 10);
gtk_widget_set_margin_end (label, 10);
gtk_widget_set_margin_top (label, 10);
gtk_widget_set_margin_bottom (label, 10);
gtk_widget_set_halign (label, GTK_ALIGN_START);
gtk_list_box_row_set_child (GTK_LIST_BOX_ROW (row), label);
gtk_list_box_insert (GTK_LIST_BOX (list), row, -1);
}
}
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_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);
gtk_widget_set_margin_start (popup, 40);
gtk_widget_set_margin_end (popup, 40);
gtk_widget_set_margin_top (popup, 40);
gtk_widget_set_margin_bottom (popup, 40);
label = gtk_label_new ("Getting more rows...");
spinner = gtk_spinner_new ();
gtk_box_append (GTK_BOX (popup), label);
gtk_box_append (GTK_BOX (popup), spinner);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), popup);
gtk_widget_hide (popup);
sw = gtk_scrolled_window_new ();
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_window_set_child (GTK_WINDOW (win), overlay);
gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (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);
while (TRUE)
g_main_context_iteration (NULL, TRUE);
return 0;
}