General jQuery based approach in frontend is working.

src/site/controllers/parts.json.php

@@ -0,0 +1,59 @@
+<?php
+
+use Joomla\CMS\MVC\Controller\BaseController;
+use Joomla\CMS\Response\JsonResponse;
+use Joomla\CMS\Factory;
+
+// No direct access.
+defined('_JEXEC') or die;
+
+abstract class UserException extends Exception {}
+class InvalidUserDataException extends UserException {}
+
+class ClubsControllerParts extends BaseController
+{
+    
+    public function edit()
+    {
+        $auth = new ClubsHelperAuth();
+        $user = $auth->getCurrentUser();
+        $app = Factory::getApplication();
+        $post = $app->input->post;
+        
+        try
+        {
+            $ret = $this->callMethod($user, $post);
+            echo new JsonResponse($ret);
+        }
+        catch(UserException $e)
+        {
+            echo new JsonResponse($e);
+        }
+        
+    }
+    
+    /**
+     * @param CommonClubsModelUser $user
+     * @param JInput $post
+     */
+    private function callMethod($user, $post)
+    {
+        switch($post->getCmd('partname'))
+        {
+            case 'user.name':
+                return $this->editUserName($user, $post);
+        }
+    }
+    
+    private function editUserName($user, $post)
+    {
+        $name = $post->getString('name');
+        if(strlen($name) < 5)
+            throw new InvalidUserDataException("Der Name muss mindestens 5 Zeichen lang sein.");
+        
+        $user->setName($name);
+        $user->save();
+        $this->setRedirect('index.php?option=com_clubs&view=mypage&layout=parts&type=name');
+    }
+    
+}

src/site/css/clubs.css

@@ -29,3 +29,18 @@ table.clubs > tbody  > tr > th
 {
 	display: none !important;
 }
+
+.address-field
+{
+	line-height: 120%;
+}
+
+.clubs_content_row .clubs-hidden
+{
+	display: none;
+}
+
+.clubs_content_row:hover > a > .edit-icon
+{
+	display: inline-block;
+}

src/site/helpers/auth.php

@@ -15,6 +15,17 @@ class ClubsHelperAuth
         return true;
     }
     
+    /**
+     * @return CommonClubsModelUser
+     */
+    public function getCurrentUser()
+    {
+        // FIXME This must be implemented
+        $userFactory = new CommonClubsModelFactoryUser();
+        $users = $userFactory->loadElements();
+        return $users[0];
+    }
+    
     public function checkUser($user, $pwd)
     {
         $userModel = BaseDatabaseModel::getInstance("user", "ClubsModel");

src/site/js/edit.js

@@ -0,0 +1,30 @@
+
+jQuery(function($){
+	
+	$(document).on('click', 'a.clubs-edit', function(ev){
+		ev.preventDefault();
+		var myA = $(this);
+		$.get(ev.currentTarget.href, function(d){
+			myA.replaceWith(d);
+		});
+	});
+	
+	$(document).on('click', 'a.clubs-abort', function(ev){
+		ev.preventDefault();
+		var form = $(this).parent();
+		$.get(this.href, function(d){
+			form.replaceWith(d);
+		});
+	});
+	
+	$(document).on('click', 'a.clubs-save', function(ev){
+		ev.preventDefault();
+		var form = $(this).parent();
+		$.post(form.attr('action'), form.serializeArray(), function(d){
+			form.replaceWith(d);
+		});
+	});
+	
+	
+	
+});

src/site/views/mypage/tmpl/default.php

@@ -12,37 +12,60 @@ defined('_JEXEC') or die;
 
 <div class='clubs_row'>
 <div class='clubs_title_row'>Name</div>
-<div class='clubs_content_row'><?php echo htmlentities($this->me->getName()); ?></div>
+<div class='clubs_content_row'>
+	<a class='clubs-edit' href='index.php?option=com_clubs&view=mypage&layout=parts&mode=edit&type=name'>
+    	<?php echo htmlentities($this->me->getName()); ?>
+    	<span class='icon-apply clubs-hidden edit-icon' style='font-size: 200%; margin-left: 0.75em;'></span>
+	</a>
+</div>
 </div>
 
 <div class='clubs_row'>
 <div class='clubs_title_row'>Benutzer-Alias</div>
-<div class='clubs_content_row'><?php echo htmlentities($this->me->getUsername()); ?></div>
+<div class='clubs_content_row'>
+	<?php echo htmlentities($this->me->getUsername()); ?>
+	<span class='icon-apply clubs-hidden edit-icon' style='font-size: 200%; margin-left: 0.75em;'></span>
+</div>
 </div>
 
 <div class='clubs_row'>
 <div class='clubs_title_row'>Adresse</div>
-<div class='clubs_content_row'><?php echo nl2br(htmlentities($this->me->getAddress())); ?></div>
+<div class='clubs_content_row address-field'>
+	<?php echo nl2br(htmlentities($this->me->getAddress())); ?>
+	<span class='icon-apply clubs-hidden edit-icon' style='font-size: 200%; margin-left: 0.75em;'></span>
+</div>
 </div>
 
 <div class='clubs_row'>
 <div class='clubs_title_row'>Stadt</div>
-<div class='clubs_content_row'><?php echo htmlentities($this->me->getCity()); ?></div>
+<div class='clubs_content_row'>
+    <?php echo htmlentities($this->me->getCity()); ?>
+    <span class='icon-apply clubs-hidden edit-icon' style='font-size: 200%; margin-left: 0.75em;'></span>
+</div>
 </div>
 
 <div class='clubs_row'>
 <div class='clubs_title_row'>E-Mail-Adresse</div>
-<div class='clubs_content_row'><?php echo htmlentities($this->me->getMail()); ?></div>
+<div class='clubs_content_row'>
+    <?php echo htmlentities($this->me->getMail()); ?>
+    <span class='icon-apply clubs-hidden edit-icon' style='font-size: 200%; margin-left: 0.75em;'></span>
+</div>
 </div>
 
 <div class='clubs_row'>
 <div class='clubs_title_row'>Telefon-Nr.</div>
-<div class='clubs_content_row'><?php echo $this->me->getPhone() !== null ? htmlentities($this->me->getPhone()) : '<i>nicht angegeben</i>'; ?></div>
+<div class='clubs_content_row'>
+	<?php echo $this->me->getPhone() !== null ? htmlentities($this->me->getPhone()) : '<i>nicht angegeben</i>'; ?>
+	<span class='icon-apply clubs-hidden edit-icon' style='font-size: 200%; margin-left: 0.75em;'></span>
+</div>
 </div>
 
 <div class='clubs_row'>
 <div class='clubs_title_row'>Handy-Nr.</div>
-<div class='clubs_content_row'><?php echo $this->me->getMobile() !== null ? htmlentities($this->me->getMobile()) : '<i>nicht angegeben</i>'; ?></div>
+<div class='clubs_content_row'>
+	<?php echo $this->me->getMobile() !== null ? htmlentities($this->me->getMobile()) : '<i>nicht angegeben</i>'; ?>
+	<span class='icon-apply clubs-hidden edit-icon' style='font-size: 200%; margin-left: 0.75em;'></span>
+</div>
 </div>
 
 

src/site/views/mypage/tmpl/parts.php

@@ -0,0 +1,50 @@
+<?php
+
+use Joomla\CMS\Factory;
+
+// No direct access.
+defined('_JEXEC') or die;
+
+$input = Factory::getApplication()->input;
+$type = $input->get->getCmd('type');
+$mode = $input->get->getCmd('mode', 'view');
+
+$auth = new ClubsHelperAuth();
+$user = $auth->getCurrentUser();
+
+if($mode === 'edit')
+{
+    echo "<form method='POST' action='index.php?option=com_clubs&task=parts.edit&format=json'>";
+    
+    switch($type)
+    {
+        case 'name':
+            $partname = 'user.name';
+            $value = $user->getName();
+            $value = htmlentities($value);
+            $content = "<input name='name' value='$value'>";
+            break;
+    }
+    echo "<input type='hidden' name='partname' value='$partname'>";
+    echo $content;
+    echo '&nbsp;<a class="clubs-save" href="#"><span class="icon-ok"></span></a>&nbsp;';
+    echo '<a class="clubs-abort" href="index.php?option=com_clubs&view=mypage&layout=parts&type='.$type.'"><span class="icon-cancel-2"></span></a>';
+    echo '</form>';
+}
+elseif ($mode === 'view')
+{
+    switch ($type)
+    {
+        case 'name':
+            $content = htmlentities($user->getName());
+            $partname = 'name';
+            break;
+    }
+    
+    echo "<a class='clubs-edit' href='index.php?option=com_clubs&view=mypage&layout=parts&mode=edit&type=$partname'>";
+    echo $content;
+    echo "<span class='icon-apply clubs-hidden edit-icon' style='font-size: 200%; margin-left: 0.75em;'></span></a>";
+}
+
+jexit();
+

src/site/views/mypage/view.html.php

@@ -1,6 +1,9 @@
 <?php
 
+use Joomla\CMS\Factory;
 use Joomla\CMS\MVC\View\HtmlView;
+use Joomla\CMS\Uri\Uri;
+use Joomla\CMS\HTML\HTMLHelper;
 
 // No direct access.
 defined('_JEXEC') or die;
@@ -10,13 +13,14 @@ class ClubsViewMyPage extends HtmlView
     
     public function display($tpl = null)
     {
-        $userFactory = new CommonClubsModelFactoryUser();
+        $auth = new ClubsHelperAuth();
-        $users = $userFactory->loadElements();
+        $this->me = $auth->getCurrentUser();
-        $this->me = $users[0];
         
         $this->clubsPresident = $this->me->getPresidentClubs();
         $this->positions = $this->me->getPositions();
         
+        HTMLHelper::_('jquery.framework');
+        Factory::getDocument()->addScript(Uri::base(true) .  "components/com_clubs/js/edit.js");
         parent::display($tpl);
     }
 }