JavaFX 2 Automatic Column Width


I have a JavaFX 2 table that is displaying contact details for people, lets imagine there are three columns: first name, last name and email address. When my application starts it populates the table with several rows of data about the people already in the system.

The problem is that the column widths are all the same. Most of the time the first and last name is displayed in full but the email address is getting clipped. The user can double click the divider in the header to resize the column but that will become tedious quickly.

Once the table has been pre-populated I would like to programatically resize all the columns to display the data they contain but I can't figure out how to achieve this. I can see that I can call col.setPrefWidth(x) but that doesn't really help as I would have to guess the width.

Best Solution

If your total number of columns are pre-known. You can distribute the column widths among the tableview's width:

nameCol.prefWidthProperty().bind(personTable.widthProperty().divide(4)); // w * 1/4
surnameCol.prefWidthProperty().bind(personTable.widthProperty().divide(2)); // w * 1/2
emailCol.prefWidthProperty().bind(personTable.widthProperty().divide(4)); // w * 1/4

In this code, the width proportions of columns are kept in sync when the tableview is resized, so you don't need to do it manually. Also the surnameCol takes the half space of the tableview's width.

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