Render a component in grid using PropertyValueGenerator?

Vaadin 6 / 7 / 8 Framework UI
1

Hi,

In a grid, I would like to render different components in rows based on a flag, but instead I get only the toStirng representation of the components in the UI. How can this be achieved in a grid?

Following is the snippet I tried

BeanItemContainer<Sample> beanContainer = new BeanItemContainer<Sample>(Sample.class, sampleList);
GeneratedPropertyContainer container = new GeneratedPropertyContainer(beanContainer);
container.addGeneratedProperty("columnDisplayed", new PropertyValueGenerator<Component>() {
  @Override
   public Component getValue(Item item, Object itemId, Object propertyId) {
      if(((Sample)itemId).isFlag) {
         return new Button("Foo");
      }
      return new Label("Bar");
   } 

   @Override
   public Class<Component> getType() {
      return Component.class;
   }
});
Grid grid = new Grid(container);
2

Officially not (yet) supported. You could use this unofficial add-on from Directory. It has a ComponentGrid<> component.

https://vaadin.com/directory#!addon/componentrenderer

3

Hi!

Thanks for the response.
One more thing, is there another way to achieve this without using an addon?

4

Well you can use grid.getColumn(yourPropertyId).setRenderer(new ButtonRenderer(…

But that always puts a NativeButton to the column. You can’t set it to alternatively output a button or a text value.

5

Hi!

Could you explain how the rows can alternatively display button and text values?
And I also want to show a combobox in some particular rows based on the condition.
Is there a specific renderer available for Combobox?

Thanks

6

[i]

Could you explain how the rows can alternatively display button and text values?
[/i]
You need a custom Renderer

[i]

Is there a specific renderer available for Combobox?
[/i]
No such Renderer available in Core Framework.

I recommend you trying out the component renderer add-on. Makes your life easier than trying to implement Renderer yourself.

7

It was easily possible in Table using the columnGenerator but we are asked to use Grid only.
Wish Grid had this feature too.

Anyways, many thanks for your time :slight_smile:

8

I share your frustration. I hope that this feature is the next in line to be implemented in Grid.