If the demo application is activated, an announcement now appears on the login page to inform visitors on how to use the demo.

auth/views.py

@@ -39,9 +39,11 @@ def dologin(request):
         error = _("Your username and password didn't match. Please try again.")
     else:
         form = LoginForm()
+
     next = request.GET.has_key("next") and request.GET["next"] or None
     return render_to_response("registration/login.html", {
-            "form" : form, "error" : error, "next" : next
+            "form" : form, "error" : error, "next" : next, 
+            "annoucements" : events.raiseQueryEvent("GetAnnouncement", target="loginpage")
             }, context_instance=RequestContext(request))
 
 def dologout(request):

demo/__init__.py

@@ -2,6 +2,7 @@
 from django.conf import settings
 from django.core.urlresolvers import reverse
 from django.utils.translation import ugettext_noop as _
+from django.template.loader import render_to_string
 from modoboa.lib import events
 from modoboa.lib.webutils import static_url
 
@@ -28,5 +29,12 @@ def menu(**kwargs):
          }
         ]
 
+def announcement(**kwargs):
+    if kwargs["target"] == "loginpage":
+        txt = render_to_string("demo/login_announcement.html")
+        return [txt]
+    return ""
+
 if 'modoboa.demo' in settings.INSTALLED_APPS:
     events.register("UserMenuDisplay", menu)
+    events.register("GetAnnouncement", announcement)

demo/templates/demo/login_announcement.html

@@ -0,0 +1,13 @@
+{% load i18n %}
+{% blocktrans %}
+<h1>Welcome to the online demo!</h1>
+<p><b>Warning:</b> the demo's concent is resetted every two hours.</p>
+<p>To try the demo, the following users are available (<i>username/password</i>): </p>
+<ul>
+  <li>A super administrator : <b>admin/password</b></li>
+  <li>A domain administrator : <b>admin@demo.local/admin</b></li>
+  <li>A simple user : <b>user@demo.local/user</b></li>
+</ul>
+<p>Please report any issue of give any suggestion to 
+  <a href="https://groups.google.com/forum/#!forum/modoboa-users">the mailing list</a>.</p>
+{% endblocktrans %}

doc/plugin_api.rst

@@ -126,7 +126,7 @@ that corresponds to the ``Request`` object used inside the associated
 view function.
 
 UserLogout
-__________
+----------
 
 Raised when a user logs out. This event provides a ``request`` argument
 that corresponds to the ``Request`` object used inside the associated
@@ -245,6 +245,17 @@ ExtDisabled
 Raised just after an extension has been disabled. The Extension
 object is available inside the ``ext`` keyword argument.
 
+GetAnnouncement
+---------------
+
+Some places in the interface let plugins add their own announcement
+(ie. message). A keyword argument ``target`` is provided to registered
+callbacks and indicates the place where the announcement will appear:
+
+* ``loginpage`` : corresponds to the login page
+
+Callbacks listening to this event must return a list of string.
+
 Parameters
 ==========
 

extensions/stats/grapher.py

@@ -3,7 +3,7 @@
 import os
 import time
 import datetime
-import rrdtool
+#import rrdtool
 from django.utils.translation import ugettext as _
 from modoboa.lib import parameters
 

lib/events.py

@@ -22,7 +22,9 @@ events = ["CreateDomain",
           "ExtDisabled",
 
           "UserLogin",
-          "UserLogout"]
+          "UserLogout",
+
+          "GetAnnouncement"]
 
 callbacks = {}
 

static/css/login.css

@@ -7,26 +7,10 @@ html, body {
 }
 
 #loginbox {
-    margin: 100px auto;
-    width: 610px;
-    padding-bottom: 15px;
-    background: white;
-
-    border: 5px solid #333;
-    /*-moz-box-shadow: 0 10px 30px #222;*/
-    -webkit-box-shadow: 0 10px 30px #222;
-    -moz-border-radius: 10px;
-    -webkit-border-radius: 5px;
-}
-
-#loginbox h2 {
-    margin: 30px 10px 0 10px;
-    font-size: small;
-}
-
-#loginbox h3 {
-    font-size: small;
-    text-align: center;
+    margin: 100px auto 10px auto;
+    padding: 0 0 15px 0;
+    font-size: 1em;
+    width: 630px;
 }
 
 #logo {
@@ -46,6 +30,40 @@ html, body {
     width: 300px;
 }
 
+.roundedbox {
+    margin: 10px auto;
+    padding: 10px;
+    width: 610px;
+    background: white;
+    font-size: 1.1em;
+
+    border: 5px solid #333;
+    border-radius: 10px;
+}
+
+.roundedbox h1 {
+    padding: 0;
+    margin: 0;
+    font-size: 1.2em;
+    text-align: center;
+}
+
+.roundedbox h2 {
+    margin: 30px 10px 0 10px;
+    font-size: small;
+}
+
+.roundedbox h3 {
+    font-size: small;
+    text-align: center;
+}
+
+.roundedbox a, a:visited {
+    font-weight: bold;
+    color: black;
+    text-decoration: none;
+}
+
 .spacer { 
     clear: both;  
 }

templates/registration/login.html

@@ -16,7 +16,7 @@
 </head>
 
 <body>
-  <div id="loginbox">
+  <div id="loginbox" class="roundedbox">
     <div id="logo">
       <img src="{{ MEDIA_URL }}css/modoboa.png" />
        {% if error %}
@@ -27,8 +27,7 @@
     <div id="test">
       <h3>{% trans "Welcome" %}</h3>
       <form method="post" action="">
-        {% include "common/genericform.html" %}
-        
+        {% include "common/genericform.html" %}        
         <div class="lastrow" align="center">
           <input type="submit" value="login" />
         </div>
@@ -37,5 +36,8 @@
     </div>
     <div class="spacer"></div>
   </div>
+  {% for annoucement in annoucements %}
+  <div class="roundedbox">{{ annoucement|safe }}</div>
+  {% endfor %}
 </body>
 </html>