From d03a55599bf6ca590c90375c4f741278a3b36f60 Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Wed, 19 Sep 2018 04:29:33 +0200
Subject: [PATCH] tests: Add a test for a permanently changing listview

This is mostly for dealing with proper anchoring and can be used to
check that things don't scroll or that selection and focus handling
properly works.

For comparison purposes, a ListBox is provided next to it.
---
 tests/meson.build              |   1 +
 tests/testlistview-animating.c | 140 +++++++++++++++++++++++++++++++++
 2 files changed, 141 insertions(+)
 create mode 100644 tests/testlistview-animating.c

diff --git a/tests/meson.build b/tests/meson.build
index 65c4189631..524a814816 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -50,6 +50,7 @@ gtk_tests = [
   ['testlist3'],
   ['testlist4'],
   ['testlistview'],
+  ['testlistview-animating'],
   ['testlevelbar'],
   ['testlockbutton'],
   ['testmenubutton'],
diff --git a/tests/testlistview-animating.c b/tests/testlistview-animating.c
new file mode 100644
index 0000000000..e2c6196ab2
--- /dev/null
+++ b/tests/testlistview-animating.c
@@ -0,0 +1,140 @@
+#include <gtk/gtk.h>
+
+#define AVERAGE 300
+#define VARIANCE 200
+
+static GtkWidget *
+create_widget (gpointer unused)
+{
+  return gtk_label_new ("");
+}
+
+static void
+bind_widget (GtkWidget *widget,
+             gpointer   item,
+             gpointer   unused)
+{
+  const char *message = g_object_get_data (item, "message");
+
+  gtk_label_set_text (GTK_LABEL (widget), message);
+}
+
+static GtkWidget *
+create_widget_for_listbox (gpointer item,
+                           gpointer unused)
+{
+  GtkWidget *widget;
+
+  widget = create_widget (unused);
+  bind_widget (widget, item, unused);
+
+  return widget;
+}
+
+static void
+add (GListStore *store)
+{
+  static guint counter;
+  GObject *o;
+  char *message;
+  guint pos;
+
+  o = g_object_new (G_TYPE_OBJECT, NULL);
+  message = g_strdup_printf ("Item %u", ++counter);
+  g_object_set_data_full (o, "message", message, g_free);
+
+  pos = g_random_int_range (0, g_list_model_get_n_items (G_LIST_MODEL (store)) + 1);
+  g_list_store_insert (store, pos, o);
+  g_object_unref (o);
+}
+
+static void
+delete (GListStore *store)
+{
+  guint pos;
+
+  pos = g_random_int_range (0, g_list_model_get_n_items (G_LIST_MODEL (store)));
+  g_list_store_remove (store, pos);
+}
+
+static gboolean
+do_stuff (gpointer store)
+{
+  if (g_random_int_range (AVERAGE - VARIANCE, AVERAGE + VARIANCE) < g_list_model_get_n_items (store))
+    delete (store);
+  else
+    add (store);
+
+  return G_SOURCE_CONTINUE;
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+  GtkWidget *win, *hbox, *vbox, *sw, *listview, *listbox, *label;
+  GListStore *store;
+  GListModel *toplevels;
+  guint i;
+
+  gtk_init ();
+
+  win = gtk_window_new ();
+  gtk_window_set_default_size (GTK_WINDOW (win), 400, 600);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
+  gtk_window_set_child (GTK_WINDOW (win), hbox);
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
+  gtk_box_append (GTK_BOX (hbox), vbox);
+
+  label = gtk_label_new ("GtkListView");
+  gtk_box_append (GTK_BOX (vbox), label);
+
+  sw = gtk_scrolled_window_new (NULL, NULL);
+  gtk_widget_set_hexpand (sw, TRUE);
+  gtk_widget_set_vexpand (sw, TRUE);
+  gtk_box_append (GTK_BOX (vbox), sw);
+
+  listview = gtk_list_view_new ();
+  gtk_list_view_set_functions (GTK_LIST_VIEW (listview),
+                               create_widget,
+                               bind_widget,
+                               NULL, NULL);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), listview);
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
+  gtk_box_append (GTK_BOX (hbox), vbox);
+
+  label = gtk_label_new ("GtkListBox");
+  gtk_box_append (GTK_BOX (vbox), label);
+
+  sw = gtk_scrolled_window_new (NULL, NULL);
+  gtk_widget_set_hexpand (sw, TRUE);
+  gtk_widget_set_vexpand (sw, TRUE);
+  gtk_box_append (GTK_BOX (vbox), sw);
+
+  listbox = gtk_list_box_new ();
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), listbox);
+
+  store = g_list_store_new (G_TYPE_OBJECT);
+  for (i = 0; i < AVERAGE; i++)
+    add (store);
+  gtk_list_view_set_model (GTK_LIST_VIEW (listview), G_LIST_MODEL (store));
+  gtk_list_box_bind_model (GTK_LIST_BOX (listbox),
+                           G_LIST_MODEL (store),
+                           create_widget_for_listbox,
+                           NULL, NULL);
+
+  g_timeout_add (100, do_stuff, store);
+
+  gtk_widget_show (win);
+
+  toplevels = gtk_window_get_toplevels ();
+  while (g_list_model_get_n_items (toplevels))
+    g_main_context_iteration (NULL, TRUE);
+
+  g_object_unref (store);
+
+  return 0;
+}
-- 
2.30.2