Step 6. Create a Gantt

And now, we're going to add a gantt on the page. The technique used for dhtmlxGrid is the same for all other DHTMLX components, including dhtmlxGantt.
We will divide the step into 2 substeps again:

If after completing the step, you will run webhost/yii_dhtmlx/web/gantt, the app will produce the following gantt that loads data from server and saves them back:

Step 6.1. Configuring the View object

Let's create a View file that will present our gantt.

For a deeper learning of dhtmlxGantt initialization, read:

To configure the View object:

In the "views/gantt " folder create a new file and name it "index.php "

Open the "index.php " file and add the following code there:

"views/gantt/index.php" file

<!DOCTYPE html>
<head>
    <meta http-equiv="Content-type" content="text/html; charset=utf-8">
    <script src="../lib/dhtmlxGantt/codebase/dhtmlxgantt.js"></script>
    <link rel="stylesheet" href="../lib/dhtmlxGantt/codebase/dhtmlxgantt.css">
</head>
 
<body>
    <div id="gantt_here" style='width:100%; height:250px;'></div>
 
    <script type="text/javascript">        gantt.init("gantt_here", new Date(2010,7,1), new Date(2010,8,1));
        // refers to the 'data' action that we will create in the next substep
        gantt.load("./gantt/data", "xml");
        //  refers to the 'data' action as well
        var dp = new dataProcessor("./gantt/data");
        dp.init(gantt);
    </script>
</body>

Step 6.2. Configuring the Controller object

The configuration of GanttConnector is the same as those of GridConnector and SchedulerConnector. Thus, we need to implement the actions below:

One that loads the view.
One that loads and processes data.

To load and process data we will use GanttConnector. A common use of GanttConnector is:

$connector = new GanttConnector(null, "PHPYii");
$connector->render_links(new $modelName, $id, $links);
$connector->render_table(new $modelName, $id, $tasks);

The GanttConnector constructor takes 2 parameters:

null - null is passed, as a model, not a database is used;
$PHPYii - the module for working with PHP, the hardcoded value.

The render_links method configures connector, retrieves data from a table with links and takes 3 parameters:

new $modelName - the method creating a model (e.g.new GanttLink());
$id - the name of the id field;
$links - a list of fields which will be used as data properties of a link.

The render_table method configures connector, retrieves data from a table with tasks and takes 3 parameters:

new $modelName - the method creating a model (e.g.new GanttTask());
$id - the name of the id field;
$tasks - a list of fields which will be used as data properties of a task.

To configure the Controller object:

Create a new file in the "controllers " folder and name it "GanttController.php ".

Open the "GanttController.php " file and specify the namespace for controllers and include the GanttConnector class and two models - 'GanttLink' and 'GanttTask':

"controllers/GanttController.php" file

<?php
namespace app\controllers;
use Yii;
use yii\web\Controller;
use Dhtmlx\Connector\GanttConnector;
use app\models\GanttTask;
use app\models\GanttLink;

Create the root controller class "GanttController ":

"controllers/GanttController.php" file

<?php
namespace app\controllers;
use Yii;
use yii\web\Controller;
use Dhtmlx\Connector\GanttConnector;
use app\models\GanttTask;
use app\models\GanttLink;
 
class GanttController extends Controller {               // here you should place all your functions       }

Create an action that will load the view:

"controllers/GanttController.php" file

class GanttController extends Controller {  
    public function actionIndex() {                 return $this->render("index");          }                                       }

Create an action that will load data to the Gantt. For building the gantt structure we'll use two models - 'GanttTask' and 'GanttLink':

"controllers/GanttController.php" file

class GanttController extends Controller {
 
    public function actionIndex() {
        return $this->render("index");
    }
 
    public function actionData() {                                                                                                                 $connector = new GanttConnector(null, "PHPYii");                                $connector->render_links(new GanttLink(),"id","source,target,type");            $connector->render_table(                                                           new GanttTask(),                                                                "id",                                                                           "start_date,duration,text,progress,parent"                                 );                                                                           }                                                                           }

That's all. We believe you have enjoyed the tutorial and seen how easy you could integrate Yii with dhtmlxConnector. The final application logic was not the goal of this article, but the interface built here is a good start for creating a fully-functional web application.

Follow our other tutorials to become a true DHTMLX expert.