Vaadin - Table column order

Question

Anybody know how to/or it is possible - create a Table with column specific order; configuration order which was before save - example in DB, and uploaded at specific view on? also I wonder how to take generate this columns headers and content from POJOS class - beans.

Any good ideas?

Answer 1

setVisibleColumns

The Table::setVisibleColumns does double-duty:

• Controls which columns are visible, and
• Sets the order in which the columns appear.

Call Table::getVisibleColumns to see current ordering.

Doc

This is well described in:

• Book of Vaadin > Table
• Sampler > User Interface > Data Presentation > Table
• Table API JavaDoc

Example Code

Basically, you need the code like this to control columns order and also set list of bean instances as datasource.

Code is not tested, just a demonstration. Valid for Vaadin 6, but I guess no significant changes comparing to Vaadin 7.

table = new Table();

// Wrap your beans collection into vaadin data container. There are many
// types of them , check Book of Vaadin.    
BeanItemContainer<Bean> container = new BeanItemContainer<Bean>(Bean.class)
container.addBean(new Bean());

// Set collection of your beans as data source. 
// Columns will be created for each property, vaadin uses reflection.
table.setContainerDataSource( container );

// You can select to display only properties you want, not all. 
// Order matters. You can get columns list from any source - for example
// store in your DB.
table.setVisibleColumns( new Object[] {"prop1", "prop2"} );

// You can set column headers (by default vaadin will set them same as bean 
// properties names). Order matters, should match above order.
table.setColumnHeaders( new String[] {"Property 1", "Property2"} );