[gtk/wip/otte/listview: 182/309] tests: Add a test for a permanently changing listview

[Benjamin Otte <otte src gnome org>]

commit 201473ea093033016f2a7df891f115eeb3d43de4
Author: Benjamin Otte <otte redhat com>
Date:   Wed Sep 19 04:29:33 2018 +0200

    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(+)
---
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;
+}