JavaFX 2 Automatic Column Width

Question

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 sta

Answer 1

To generelize the width and use any number and make sure that the width is 100% of the table's width, you can use :

double[] widths = {20, 30, 50, 20, 30, 70, 50};//define the width of the columns

//calculate the sum of the width
double sum = 0;
for (double i : widths) {
    sum += i;
}

//set the width to the columns
for (int i = 0; i < widths.length; i++) {
    table.getColumns().get(i).prefWidthProperty().bind(
            table.widthProperty().multiply(sizes[i] / sum));
    //---------The exact width-------------^-------------^
}

Answer 2

my idea.

table.getColumns().add(new TableColumn<>("Num") {
    {
        // 15%
        prefWidthProperty().bind(table.widthProperty().multiply(0.15));
    }
});
table.getColumns().add(new TableColumn<>("Filename") {{
    // 20%
    prefWidthProperty().bind(table.widthProperty().multiply(.2));
}});
table.getColumns().add(new TableColumn<>("Path") {{
    // 50%
    prefWidthProperty().bind(table.widthProperty().multiply(.5));
}});
table.getColumns().add(new TableColumn<>("Status") {
    {
        // 15%
        prefWidthProperty().bind(table.widthProperty().multiply(.15));
    }
});

Answer 3

As I use SceneBuider, I just define the MinWidth, and MaxWidth to some columns and to the main column I just define the PrefWidth to "USE_COMPUTED_SIZE"

Answer 4

After 3 years, finally I found the solution, javafx column in tableview auto fit size

import com.sun.javafx.scene.control.skin.TableViewSkin;
import javafx.scene.control.Skin;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class GUIUtils {
    private static Method columnToFitMethod;

    static {
        try {
            columnToFitMethod = TableViewSkin.class.getDeclaredMethod("resizeColumnToFitContent", TableColumn.class, int.class);
            columnToFitMethod.setAccessible(true);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
    }

    public static void autoFitTable(TableView tableView) {
        tableView.getItems().addListener(new ListChangeListener<Object>() {
            @Override
            public void onChanged(Change<?> c) {
                for (Object column : tableView.getColumns()) {
                    try {
                        columnToFitMethod.invoke(tableView.getSkin(), column, -1);
                    } catch (IllegalAccessException | InvocationTargetException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
    }
}

Answer 5

This works for me in JavaFX 8

table.setColumnResizePolicy( TableView.CONSTRAINED_RESIZE_POLICY );
col1.setMaxWidth( 1f * Integer.MAX_VALUE * 50 ); // 50% width
col2.setMaxWidth( 1f * Integer.MAX_VALUE * 30 ); // 30% width
col3.setMaxWidth( 1f * Integer.MAX_VALUE * 20 ); // 20% width

In the other examples you have the problem, the vertical scrollbar width is ignored.

Answer 6

If you had 4 columns and only last column needed to expand to fill the rest of the table width and the other columns remained the size I set in Scene Builder.

double width = col1.widthProperty().get();
width += col2.widthProperty().get();
width += col3.widthProperty().get();

col4.prefWidthProperty().bind(table.widthProperty().subtract(width));

Or if you had 2 columns that needed to expand then.

double width = col1.widthProperty().get();
width += col3.widthProperty().get();

col2.prefWidthProperty().bind(table.widthProperty().subtract(width).divide(2));
col4.prefWidthProperty().bind(table.widthProperty().subtract(width).divide(2));