[gtk/focus-adjustment: 5/6] Add a test for scroll-to-focus

[Matthias Clasen <matthiasc src gnome org>]

commit 586640863e21dfb8f3f7310e6158f57e19f97b23
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Apr 16 17:23:48 2020 -0400

    Add a test for scroll-to-focus

 tests/meson.build         |  1 +
 tests/testscrolltofocus.c | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)
---
diff --git a/tests/meson.build b/tests/meson.build
index 6d57a63c9f..45014aca7b 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -94,6 +94,7 @@ gtk_tests = [
   ['testvolumebutton'],
   ['testscrolledwindow'],
   ['testscrolledge'],
+  ['testscrolltofocus'],
   ['testcellarea'],
   ['testswitch'],
   ['testnoscreen'],
diff --git a/tests/testscrolltofocus.c b/tests/testscrolltofocus.c
new file mode 100644
index 0000000000..275ba0f173
--- /dev/null
+++ b/tests/testscrolltofocus.c
@@ -0,0 +1,39 @@
+#include <gtk/gtk.h>
+
+int main (int argc, char *argv[])
+{
+  GtkWidget *window, *sw, *viewport, *grid;
+  GtkWidget *entry;
+  int i, j;
+  char *text;
+
+  gtk_init ();
+
+  window = gtk_window_new ();
+  sw = gtk_scrolled_window_new (NULL, NULL);
+  gtk_container_add (GTK_CONTAINER (window), sw);
+  viewport = gtk_viewport_new (gtk_scrolled_window_get_hadjustment (GTK_SCROLLED_WINDOW (sw)),
+                               gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (sw)));
+  gtk_viewport_set_scroll_to_focus (GTK_VIEWPORT (viewport), TRUE);
+  gtk_container_add (GTK_CONTAINER (sw), viewport);
+  grid = gtk_grid_new ();
+  gtk_container_add (GTK_CONTAINER (viewport), grid);
+
+  for (i = 0; i < 20; i++)
+    for (j = 0; j < 20; j++)
+      {
+        entry = gtk_entry_new ();
+        text = g_strdup_printf ("(%d, %d)", i, j);
+        gtk_editable_set_text (GTK_EDITABLE (entry), text);
+        g_free (text);
+        gtk_editable_set_width_chars (GTK_EDITABLE (entry), 6);
+        gtk_grid_attach (GTK_GRID (grid), entry, i, j, 1, 1);
+      }
+ 
+  gtk_window_present (GTK_WINDOW (window));
+
+  while (1)
+    g_main_context_iteration (NULL, FALSE);
+
+  return 0;
+}