[gtk/wip/exalm/2242-test] tests: Add a headerbar-in-window test case

[Alexander Mikhaylenko <alexm src gnome org>]

commit 70d14f60b265b5048a3020c36931e6180da72cc4
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon May 11 22:37:58 2020 +0500

    tests: Add a headerbar-in-window test case
    
    See https://gitlab.gnome.org/GNOME/gtk/-/issues/2242

 tests/meson.build      |   1 +
 tests/testheaderbar2.c | 278 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 279 insertions(+)
---
diff --git a/tests/meson.build b/tests/meson.build
index 03bb928fd4..facebb3f01 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -49,6 +49,7 @@ gtk_tests = [
   ['testgrid'],
   ['testgtk'],
   ['testheaderbar'],
+  ['testheaderbar2'],
   ['testheightforwidth'],
   ['testhover'],
   ['testiconview'],
diff --git a/tests/testheaderbar2.c b/tests/testheaderbar2.c
new file mode 100644
index 0000000000..fda5016d84
--- /dev/null
+++ b/tests/testheaderbar2.c
@@ -0,0 +1,278 @@
+#include <gtk/gtk.h>
+
+static void
+unset_title (GtkWidget *window)
+{
+  GtkWidget *box;
+
+  g_assert (GTK_IS_WINDOW (window));
+
+  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+  gtk_widget_hide (box);
+
+  gtk_window_set_titlebar (GTK_WINDOW (window), box);
+}
+
+static void
+load_css (GtkWidget  *widget,
+          const char *css)
+{
+  GtkCssProvider *provider;
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context (widget);
+
+  provider = gtk_css_provider_new ();
+  gtk_css_provider_load_from_data (provider, css, -1);
+  gtk_style_context_add_provider (context, GTK_STYLE_PROVIDER (provider), 800);
+}
+
+static void
+create_regular (GtkApplication *app)
+{
+  GtkWidget *window, *label;
+
+  window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Regular window");
+
+  label = gtk_label_new ("This window has no titlebar set");
+  gtk_label_set_wrap (GTK_LABEL (label), TRUE);
+  gtk_window_set_child (GTK_WINDOW (window), label);
+
+  gtk_widget_show (window);
+}
+
+static void
+create_headerbar_as_titlebar (GtkApplication *app)
+{
+  GtkWidget *window, *header, *label;
+
+  window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Headerbar as titlebar");
+
+  header = gtk_header_bar_new ();
+  gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
+  gtk_window_set_titlebar (GTK_WINDOW (window), header);
+
+  label = gtk_label_new ("This window has a headerbar set as a titlebar");
+  gtk_label_set_wrap (GTK_LABEL (label), TRUE);
+  gtk_window_set_child (GTK_WINDOW (window), label);
+
+  gtk_widget_show (window);
+}
+
+static void
+create_headerbar_inside_window (GtkApplication *app)
+{
+  GtkWidget *window, *box, *header, *label;
+
+  window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Headerbar inside window");
+  unset_title (window);
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+  gtk_window_set_child (GTK_WINDOW (window), box);
+
+  header = gtk_header_bar_new ();
+  gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
+  gtk_container_add (GTK_CONTAINER (box), header);
+
+  label = gtk_label_new ("This window has a headerbar inside the window and no titlebar");
+  gtk_label_set_wrap (GTK_LABEL (label), TRUE);
+  gtk_widget_set_vexpand (label, TRUE);
+  gtk_container_add (GTK_CONTAINER (box), label);
+
+  gtk_widget_show (window);
+}
+
+static void
+create_headerbar_overlay (GtkApplication *app)
+{
+  GtkWidget *window, *overlay, *sw, *box, *header, *label;
+
+  window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Headerbar overlaying content");
+  unset_title (window);
+
+  overlay = gtk_overlay_new ();
+  gtk_window_set_child (GTK_WINDOW (window), overlay);
+
+  header = gtk_header_bar_new ();
+  gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
+  gtk_widget_set_valign (header, GTK_ALIGN_START);
+  gtk_overlay_add_overlay (GTK_OVERLAY (overlay), header);
+  load_css (header, "headerbar { background: alpha(shade(@theme_bg_color, .9), .8); }");
+
+  sw = gtk_scrolled_window_new (NULL, NULL);
+  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
+  gtk_widget_set_size_request (sw, 300, 250);
+  gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), box);
+  gtk_widget_set_size_request (sw, 300, 250);
+
+  label = gtk_label_new ("Lorem ipsum dolor sit amet, consectetur adipiscing elit. "
+                         "Nulla innn urna ac dui malesuada ornare. Nullam dictum "
+                         "tempor mi et tincidunt. Aliquam metus nulla, auctor "
+                         "vitae pulvinar nec, egestas at mi. Class aptent taciti "
+                         "sociosqu ad litora torquent per conubia nostra, per "
+                         "inceptos himenaeos. Aliquam sagittis, tellus congue "
+                         "cursus congue, diam massa mollis enim, sit amet gravida "
+                         "magna turpis egestas sapien. Aenean vel molestie nunc. "
+                         "In hac habitasse platea dictumst. Suspendisse lacinia"
+                         "mi eu ipsum vestibulum in venenatis enim commodo. "
+                         "Vivamus non malesuada ligula.");
+  gtk_label_set_wrap (GTK_LABEL (label), TRUE);
+  gtk_container_add (GTK_CONTAINER (box), label);
+
+  label = gtk_label_new ("This window has a headerbar inside an overlay, so the text is visible underneath 
it");
+  gtk_label_set_wrap (GTK_LABEL (label), TRUE);
+  gtk_widget_set_vexpand (label, TRUE);
+  gtk_container_add (GTK_CONTAINER (box), label);
+
+  gtk_widget_show (window);
+}
+
+static void
+create_hiding_headerbar (GtkApplication *app)
+{
+  GtkWidget *window, *box, *revealer, *header, *label, *hbox, *toggle;
+
+  window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hiding headerbar");
+  unset_title (window);
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+  gtk_window_set_child (GTK_WINDOW (window), box);
+
+  revealer = gtk_revealer_new ();
+  gtk_container_add (GTK_CONTAINER (box), revealer);
+
+  header = gtk_header_bar_new ();
+  gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
+  gtk_revealer_set_child (GTK_REVEALER (revealer), header);
+
+  label = gtk_label_new ("This window's headerbar can be shown and hidden with animation");
+  gtk_label_set_wrap (GTK_LABEL (label), TRUE);
+  gtk_widget_set_vexpand (label, TRUE);
+  gtk_container_add (GTK_CONTAINER (box), label);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
+  gtk_widget_set_halign (hbox, GTK_ALIGN_CENTER);
+  gtk_widget_set_margin_top (hbox, 12);
+  gtk_widget_set_margin_bottom (hbox, 12);
+  gtk_widget_set_margin_start (hbox, 12);
+  gtk_widget_set_margin_end (hbox, 12);
+  gtk_container_add (GTK_CONTAINER (box), hbox);
+
+  toggle = gtk_switch_new ();
+  gtk_switch_set_active (GTK_SWITCH (toggle), TRUE);
+  gtk_container_add (GTK_CONTAINER (hbox), toggle);
+  g_object_bind_property (toggle, "active",
+                          revealer, "reveal-child",
+                          G_BINDING_SYNC_CREATE);
+
+  label = gtk_label_new ("Show headerbar");
+  gtk_container_add (GTK_CONTAINER (hbox), label);
+
+  gtk_widget_show (window);
+}
+
+static void
+create_fake_headerbar (GtkApplication *app)
+{
+  GtkWidget *window, *handle, *box, *center_box, *controls, *label;
+
+  window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Fake headerbar");
+  unset_title (window);
+
+  handle = gtk_window_handle_new ();
+  gtk_window_set_child (GTK_WINDOW (window), handle);
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+  gtk_window_handle_set_child (GTK_WINDOW_HANDLE (handle), box);
+
+  center_box = gtk_center_box_new ();
+  gtk_container_add (GTK_CONTAINER (box), center_box);
+
+  label = gtk_label_new ("Fake headerbar");
+  gtk_center_box_set_center_widget (GTK_CENTER_BOX (center_box), label);
+
+  controls = gtk_window_controls_new (GTK_PACK_START);
+  gtk_center_box_set_start_widget (GTK_CENTER_BOX (center_box), controls);
+
+  controls = gtk_window_controls_new (GTK_PACK_END);
+  gtk_center_box_set_end_widget (GTK_CENTER_BOX (center_box), controls);
+
+  label = gtk_label_new ("This window's titlebar is just a centerbox with a label and window controls.\nThe 
whole window is draggable.");
+  gtk_label_set_wrap (GTK_LABEL (label), TRUE);
+  gtk_widget_set_vexpand (label, TRUE);
+  gtk_container_add (GTK_CONTAINER (box), label);
+
+  gtk_widget_show (window);
+}
+
+struct {
+  const gchar *name;
+  void (*cb) (GtkApplication *app);
+} buttons[] =
+{
+    { "Regular window", create_regular },
+    { "Headerbar as titlebar", create_headerbar_as_titlebar },
+    { "Headerbar inside window", create_headerbar_inside_window },
+    { "Headerbar overlaying content", create_headerbar_overlay },
+    { "Hiding headerbar", create_hiding_headerbar },
+    { "Fake headerbar", create_fake_headerbar },
+};
+int n_buttons = sizeof (buttons) / sizeof (buttons[0]);
+
+static void
+app_activate_cb (GtkApplication *app)
+{
+  GtkWidget *window, *box;
+  int i;
+
+  window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Headerbar test");
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+  gtk_widget_set_halign (box, GTK_ALIGN_CENTER);
+  gtk_widget_set_valign (box, GTK_ALIGN_CENTER);
+  gtk_widget_add_css_class (box, "linked");
+  gtk_window_set_child (GTK_WINDOW (window), box);
+
+  for (i = 0; i < n_buttons; i++)
+    {
+      GtkWidget *btn;
+
+      btn = gtk_button_new_with_label (buttons[i].name);
+      g_signal_connect_object (btn,
+                               "clicked",
+                               G_CALLBACK (buttons[i].cb),
+                               app,
+                               G_CONNECT_SWAPPED);
+      gtk_container_add (GTK_CONTAINER (box), btn);
+    }
+
+  gtk_widget_show (window);
+}
+
+int
+main (int    argc,
+      char **argv)
+{
+  GtkApplication *app;
+
+  app = gtk_application_new ("org.gtk.Test.headerbar2", 0);
+
+  g_signal_connect (app,
+                    "activate",
+                    G_CALLBACK (app_activate_cb),
+                    NULL);
+
+  g_application_run (G_APPLICATION (app), argc, argv);
+
+  return 0;
+}