[gtk] gtk-demo: Add a password entry demo

[Matthias Clasen <matthiasc src gnome org>]

commit f5e112fd2d802df6d2c60325dbf138f0c0241616
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Mar 13 18:53:13 2019 -0400

    gtk-demo: Add a password entry demo

 demos/gtk-demo/demo.gresource.xml |  1 +
 demos/gtk-demo/meson.build        |  1 +
 demos/gtk-demo/password_entry.c   | 87 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 89 insertions(+)
---
diff --git a/demos/gtk-demo/demo.gresource.xml b/demos/gtk-demo/demo.gresource.xml
index 0a49548a48..fa0c245c87 100644
--- a/demos/gtk-demo/demo.gresource.xml
+++ b/demos/gtk-demo/demo.gresource.xml
@@ -189,6 +189,7 @@
     <file>paintable_animated.c</file>
     <file>paintable_mediastream.c</file>
     <file>panes.c</file>
+    <file>password_entry.c</file>
     <file>pickers.c</file>
     <file>pixbufs.c</file>
     <file>popover.c</file>
diff --git a/demos/gtk-demo/meson.build b/demos/gtk-demo/meson.build
index 83d0176250..e331001abb 100644
--- a/demos/gtk-demo/meson.build
+++ b/demos/gtk-demo/meson.build
@@ -47,6 +47,7 @@ demos = files([
   'paintable_animated.c',
   'paintable_mediastream.c',
   'panes.c',
+  'password_entry.c',
   'pickers.c',
   'pixbufs.c',
   'popover.c',
diff --git a/demos/gtk-demo/password_entry.c b/demos/gtk-demo/password_entry.c
new file mode 100644
index 0000000000..d190d685ad
--- /dev/null
+++ b/demos/gtk-demo/password_entry.c
@@ -0,0 +1,87 @@
+/* Entry/Password Entry
+ *
+ * GtkPasswordEntry provides common functionality of
+ * entries that are used to enter passwords and other
+ * secrets.
+ *
+ * It will display a warning if CapsLock is on, and it
+ * can optionally provide a way to see the text.
+ */
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+static GtkWidget *entry;
+static GtkWidget *entry2;
+static GtkWidget *button;
+
+static void
+update_button (GObject    *object,
+               GParamSpec *pspec,
+               gpointer    data)
+{
+  const char *text = gtk_editable_get_text (GTK_EDITABLE (entry));
+  const char *text2 = gtk_editable_get_text (GTK_EDITABLE (entry2));
+
+  gtk_widget_set_sensitive (button,
+                            text[0] != '\0' && g_str_equal (text, text2));
+}
+
+GtkWidget *
+do_password_entry (GtkWidget *do_widget)
+{
+  static GtkWidget *window = NULL;
+  GtkWidget *box;
+  GtkWidget *header;
+
+  if (!window)
+    {
+      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      gtk_window_set_display (GTK_WINDOW (window),
+                              gtk_widget_get_display (do_widget));
+      header = gtk_header_bar_new ();
+      gtk_header_bar_set_title (GTK_HEADER_BAR (header), "Choose a Password");
+      gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), FALSE);
+      gtk_window_set_titlebar (GTK_WINDOW (window), header);
+      gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
+      gtk_window_set_deletable (GTK_WINDOW (window), FALSE);
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);
+
+      box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
+      g_object_set (box, "margin", 18, NULL);
+      gtk_container_add (GTK_CONTAINER (window), box);
+
+      entry = gtk_password_entry_new ();
+      g_object_set (entry,
+                    "placeholder-text", "Password",
+                    "activates-default", TRUE,
+                    NULL);
+      g_signal_connect (entry, "notify::text", G_CALLBACK (update_button), NULL);
+      gtk_container_add (GTK_CONTAINER (box), entry);
+
+      entry2 = gtk_password_entry_new ();
+      g_object_set (entry2,
+                    "placeholder-text", "Confirm",
+                    "activates-default", TRUE,
+                    NULL);
+      g_signal_connect (entry2, "notify::text", G_CALLBACK (update_button), NULL);
+      gtk_container_add (GTK_CONTAINER (box), entry2);
+
+      button = gtk_button_new_with_mnemonic ("_Done");
+      gtk_style_context_add_class (gtk_widget_get_style_context (button), "suggested-action");
+      g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
+      gtk_widget_set_sensitive (button, FALSE);
+      gtk_header_bar_pack_end (GTK_HEADER_BAR (header), button);
+
+      gtk_widget_set_can_default (button, TRUE);
+      gtk_window_set_default (GTK_WINDOW (window), button);
+    }
+
+  if (!gtk_widget_get_visible (window))
+    gtk_widget_show (window);
+  else
+    gtk_widget_destroy (window);
+
+  return window;
+}