This is a developer documentation for a simple application without any database access. Feng Office uses the MVC design pattern, but for this example we need only the view and the controller part.

Create a new file called HelloworldController.class.php in the application/controllers folder. This controller will be loaded automatically and have one or more actions (here only one: index). You can set some variables to use they in the view template.

class HelloworldController extends ApplicationController {
	function __construct() {
		parent::__construct();
		prepare_company_website_controller($this, 'website');
	}
	function index() {
		$my_var = 'World';
		tpl_assign('world', $my_var);
 
	}
}

Create a file which is called equal to the action name, here index.php, in the application/views folder to show the output of the controller.

Hello <?php echo $world ?> !

Show the new application near the others as a tab: Add it to the constructor of the TabPanel class to the items array in public/assets/javascript/og/layout.js :

	var tab_panel = new Ext.TabPanel({
		id: 'tabs-panel',
		region:'center',
		activeTab: 0,
		enableTabScroll: true,
		items: [
			...
			new og.ContentPanel({
				title: lang('helloworld'),
				id: 'helloworld-panel',
				iconCls: 'ico-helloworld',
				refreshOnWorkspaceChange: true,
				defaultContent: {
					type: "url",
					data: og.getUrl('helloworld','index')
				}
			}),

For the English translation add a new item called helloword (see above) to the array in the javascript file language/en_us/lang.js.

	...
  	'completed on': 'Completed on',
  	/* Hello World */
  	'helloworld': 'Hello World',

The icon must set by the used theme, so for the default theme you save your icon by default in the public/assets/themes/default/images/16×16 folder. Now connect the CSS class ico-helloworld to your image in the CSS file public/assets/themes/default/stylesheets/general/layout.css

.ico-helloworld {
	background-image: url(../../images/16x16/helloworld.png) !important;
}

Now reload your Feng Office and you will see your Hello World! application at the top.

For Hello World discussion see http://forums.opengoo.org/index.php?topic=476.0

Using hooks in openGoo