[gtk/peek-password: 13/14] gtk-demo: Show password strength

[Matthias Clasen <matthiasc src gnome org>]

commit d3d65e9148b10319e7c32b505e7039ae3d308b76
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Mar 13 20:37:42 2019 -0400

    gtk-demo: Show password strength
    
    Make the password entry demo show password strength.

 demos/gtk-demo/password_entry.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/demos/gtk-demo/password_entry.c b/demos/gtk-demo/password_entry.c
index b7083286bd..a30fd35174 100644
--- a/demos/gtk-demo/password_entry.c
+++ b/demos/gtk-demo/password_entry.c
@@ -27,6 +27,19 @@ update_button (GObject    *object,
                             text[0] != '\0' && g_str_equal (text, text2));
 }
 
+static int
+get_strength (GtkPasswordEntry *entry)
+{
+  const char *text;
+  int strength;
+
+  text = gtk_editable_get_text (GTK_EDITABLE (entry));
+
+  strength = CLAMP (10 * strlen (text), 0, 100);
+
+  return strength;
+}
+
 GtkWidget *
 do_password_entry (GtkWidget *do_widget)
 {
@@ -59,6 +72,8 @@ do_password_entry (GtkWidget *do_widget)
                     "activates-default", TRUE,
                     NULL);
       g_signal_connect (entry, "notify::text", G_CALLBACK (update_button), NULL);
+      gtk_password_entry_set_show_strength (GTK_PASSWORD_ENTRY (entry), TRUE);
+      g_signal_connect (entry, "get-strength", G_CALLBACK (get_strength), NULL);
       gtk_container_add (GTK_CONTAINER (box), entry);
 
       entry2 = gtk_password_entry_new ();