Set vaadin table height to fit contents

Question

I use CustomLayout in my project to separate UI object and their style.

I have some problem with tables.

I define a div and I want the table's height set to div's height.

Which is the best way?

I thought:

table.setsizeFull() ;
table.setPageLength(0);

in the code, but the result is not what I want. I want the table full sized in div's dimensions, both with or without elements inside.

Any suggest?

Answer 1

I was solving a similar problem: I wanted a table to grow as I added rows to it. I didn't care about its exact height, as long as it showed all the rows of data, and grew as I added rows. I also wanted the table to always show some extra space at the bottom.

The core idea here is that I did three things:

• Do not call setHeight() for the table.
• I used setPageLength() to define table height by rows--by how many rows high the table should be.
• I called requestRepaint() on the element I resized. If I resized a column element, I called it on the column element. If I resized the table, I called it on the table.

Here's a generalized code sample showing how I solved this problem. My code isn't complete, but it might help you get started.

public class MyClass extends Table {

    public MyClass(...)
    {
        this.setWidth("100%"); // fill parent <td>'s width, allows draggable sizing.
        // note: do NOT setHeight().

        setupColumns(); // details not shown here
        setupBehavior(); // details not shown (listeners, etc)
        addDataToTable(); // details not shown

        adjustHeight();
    }

    // I also have a function to add rows to the table when 
        // a button is clicked.  That function calls adjustHeight() (shown below).

    public void adjustHeight()
    {
        this.setPageLength(this.getItemIds().size() + 1);
        this.requestRepaint();
    }
}

[EDIT/FOLLOW-UP] I've found that using this method tends to cause unnecessary scroll bars to be rendered on tables if you are using setColumnExpandRatio() (dynamic column widths). So just as a heads-up, you should use fixed width columns (setColumnWidth()) if you use the trick I showed above.