3 files changed, 30 insertions, 5 deletions
diff --git a/admin/themes/default/template/footer.tpl b/admin/themes/default/template/footer.tpl
index 3b6b8af43..763942e60 100644
--- a/admin/themes/default/template/footer.tpl
+++ b/admin/themes/default/template/footer.tpl
@@ -45,7 +45,7 @@
 {literal}
 <script type='text/javascript'>
   $(function() {
-    $('#pwgHead A, #footer A, .themeActions A').tipTip({
+    $('#pwgHead A, #footer A, .themeActions A, .themeActions SPAN').tipTip({
         'delay' : 0,
         'fadeIn' : 200,
         'fadeOut' : 200,
diff --git a/admin/themes/default/template/themes_installed.tpl b/admin/themes/default/template/themes_installed.tpl
index a231f39ff..0a5a0cc85 100644
--- a/admin/themes/default/template/themes_installed.tpl
+++ b/admin/themes/default/template/themes_installed.tpl
@@ -4,7 +4,8 @@
 
 <div id="themesContent">
 
-<h3>Active Themes</h3>
+<fieldset>
+<legend>Active Themes</legend>
 {if isset($active_themes)}
 <div class="themeBoxes">
 {foreach from=$active_themes item=theme}
@@ -21,9 +22,11 @@
 {/foreach}
 </div> <!-- themeBoxes -->
 {/if}
+</fieldset>
 
 {if isset($inactive_themes)}
-<h3>Inactive Themes</h3>
+<fieldset>
+<legend>Inactive Themes</legend>
 <div class="themeBoxes">
 {foreach from=$inactive_themes item=theme}
   <div class="themeBox">
@@ -31,12 +34,18 @@
     <div class="themeShot"><img src="{$theme.screenshot}"></div>
     <div class="themeActions">
       <a href="{$activate_baseurl}{$theme.id}" title="{'Make this theme available to users'|@translate}">{'Activate'|@translate}</a>
-      | <a href="{$delete_baseurl}{$theme.id}" onclick="return confirm('{'Are you sure?'|@translate|@escape:javascript}');" title="{'Delete this theme'|@translate}">{'Delete'|@translate}</a>
+      |
+  {if $theme.deletable}
+      <a href="{$delete_baseurl}{$theme.id}" onclick="return confirm('{'Are you sure?'|@translate|@escape:javascript}');" title="{'Delete this theme'|@translate}">{'Delete'|@translate}</a>
+  {else}
+      <span title="{$theme.delete_tooltip}">{'Delete'|@translate}</span>
+  {/if}
     </div>
     
   </div>
 {/foreach}
 </div> <!-- themeBoxes -->
+</fieldset>
 {/if}
 
 </div> <!-- themesContent -->
 \ No newline at end of file
diff --git a/admin/themes_installed.php b/admin/themes_installed.php
index 68510354f..82efe569a 100644
--- a/admin/themes_installed.php
+++ b/admin/themes_installed.php
@@ -68,7 +68,7 @@ foreach ($db_themes as $db_theme)
 $active_themes = array();
 $inactive_themes = array();
 
-foreach($themes->fs_themes as $theme_id => $fs_theme)
+foreach ($themes->fs_themes as $theme_id => $fs_theme)
 {
   if ($theme_id == 'default')
   {
@@ -89,6 +89,22 @@ foreach($themes->fs_themes as $theme_id => $fs_theme)
   }
   else
   {
+    $children = $themes->get_children_themes($theme_id);
+    
+    if (count($children) > 0)
+    {
+      $fs_theme['deletable'] = false;
+      
+      $fs_theme['delete_tooltip'] = sprintf(
+        l10n('Impossible to delete this theme. Other themes depends on it: %s'),
+        implode(', ', $children)
+        );
+    }
+    else
+    {
+      $fs_theme['deletable'] = true;
+    }
+    
     array_push($inactive_themes, $fs_theme);
   }
 }