Time for action – creating a custom component

Have you ever accepted license terms when installing software? Sometimes you can click the Install button only and only if you have previously checked a Yeah right. I do Accept the Terms checkbox. Let's make a custom component to emulate that corporate praised behavior. The steps to create a custom component are as follows:

1. Create a new Vaadin project with the name customcomponent using your IDE.

2. Create a new class extending CustomComponent:

   public class AcceptTermsButton extends CustomComponent {
   
   }

3. We need three components: a CheckBox, a Button, and a VerticalLayout:

   public class AcceptTermsButton extends CustomComponent {
   
     private VerticalLayout layout = new VerticalLayout();
     private CheckBox checkbox = new CheckBox();
     private Button button = new Button();
   
   }

   Note

   We are defining the components as class members only to emphasize that we are creating a composition of objects, but actually we only need button to be a class member.

4. Create a constructor...