package com.vaadin.tests.components.grid;
import com.vaadin.annotations.Widgetset;
import com.vaadin.data.ValueProvider;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUI;
import com.vaadin.ui.Button;
import com.vaadin.ui.Grid;
import com.vaadin.ui.Grid.Column;
import com.vaadin.ui.Label;
import com.vaadin.ui.Notification;
import com.vaadin.ui.renderers.NumberRenderer;
@Widgetset("com.vaadin.DefaultWidgetSet")
public class GridAddColumn extends AbstractTestUI {
@Override
protected void setup(VaadinRequest request) {
Grid<String> grid = new Grid<>();
createColumns(grid);
grid.setItems("a", "aa", "aaa");
addComponent(grid);
addComponent(new Button("Replace columns", e -> {
grid.removeAllColumns();
createColumns(grid);
Notification.show("Columns replaced.");
}));
}
private void createColumns(Grid<String> grid) {
Column<String, String> col0 = grid.addColumn(ValueProvider.identity())
.setCaption("First column");
grid.getDefaultHeaderRow().getCell(col0)
.setComponent(new Label("Label Header"));
grid.addColumn(String::length, new NumberRenderer());
grid.addColumn(String::length);
grid.addColumn(string -> -string.length());
grid.addColumn(string -> new Object());
}
}