Matti Tahvonen mstahv

Developer advocate working at @vaadin. Web apps since '90s with Perl, Java, PHP, JavaScript...

mstahv / NavigationView.java

Created August 23, 2024 07:12

	package org.peimari.maastokanta.mobile;

	import com.vaadin.flow.component.Component;
	import com.vaadin.flow.component.html.H3;
	import com.vaadin.flow.component.orderedlayout.FlexComponent;
	import org.vaadin.firitin.components.orderedlayout.VHorizontalLayout;
	import org.vaadin.firitin.components.orderedlayout.VVerticalLayout;

	public class NavigationView extends VVerticalLayout {

mstahv / BarcodeView.java

Created August 30, 2023 05:33

Example how to generate Barcodes in Vaadin apps

	package org.example.views;

	import com.google.zxing.BarcodeFormat;
	import com.google.zxing.client.j2se.MatrixToImageWriter;
	import com.google.zxing.common.BitMatrix;
	import com.google.zxing.oned.EAN13Writer;
	import com.vaadin.flow.component.html.Image;
	import com.vaadin.flow.component.orderedlayout.VerticalLayout;
	import com.vaadin.flow.router.Route;
	import com.vaadin.flow.server.AbstractStreamResource;

mstahv / PushBased.java

Last active June 2, 2023 09:36

Prototype of session timeout warning dialog

	package org.vaadin.vaadin.sb.example.views;

	import com.vaadin.flow.component.AttachEvent;
	import com.vaadin.flow.component.DetachEvent;
	import com.vaadin.flow.component.UI;
	import com.vaadin.flow.component.button.Button;
	import com.vaadin.flow.component.html.Paragraph;
	import com.vaadin.flow.component.html.Span;
	import com.vaadin.flow.component.orderedlayout.VerticalLayout;
	import com.vaadin.flow.router.Route;

mstahv / Example.java

Created January 26, 2023 16:52

Abusing Vaadin ComboBox lazy data binding for filtering other components using ComboBox

	ArrayList<String> values = new ArrayList<>();
	values.add("foo");
	values.add("bar");
	ComboBox<String> stringComboBox = new ComboBox<>();

	stringComboBox.setItemsWithFilterConverter((CallbackDataProvider.FetchCallback<String, String>) query -> {
	if(query.getFilter().isPresent()) {
	String filter = query.getFilter().get();
	System.out.println("Do something else with filter: " + filter);
	return values.stream()

mstahv / SpringDataVaadinUtil.java

Created July 7, 2020 13:31

	import java.util.stream.Collectors;

	import org.springframework.data.domain.Sort;
	import org.springframework.data.domain.Sort.Order;

	import com.vaadin.flow.data.provider.Query;
	import com.vaadin.flow.data.provider.SortDirection;

	public class SpringDataVaadinUtil {

mstahv / MainView.java

Created August 5, 2019 14:48

	package com.example.demo;

	import java.sql.Connection;
	import java.sql.PreparedStatement;
	import java.sql.ResultSet;
	import java.sql.SQLException;
	import java.sql.Statement;
	import java.util.ArrayList;
	import java.util.List;

mstahv / Google2APi.java

Last active November 4, 2018 17:34

Google OAuth2.0 for scribe-java

	package org.scribe.builder.api;

	import java.util.regex.Matcher;
	import java.util.regex.Pattern;

	import org.scribe.exceptions.OAuthException;
	import org.scribe.extractors.AccessTokenExtractor;
	import org.scribe.model.OAuthConfig;
	import org.scribe.model.OAuthConstants;
	import org.scribe.model.OAuthRequest;

mstahv / MyUI.java

Created March 22, 2016 07:45

Yet another example to add lang attribute to html tag, this time with Viritin add-on

	package org.test;

	import javax.servlet.annotation.WebServlet;

	import com.vaadin.annotations.Theme;
	import com.vaadin.annotations.VaadinServletConfiguration;
	import com.vaadin.server.VaadinRequest;
	import com.vaadin.server.VaadinServlet;
	import com.vaadin.ui.Label;
	import com.vaadin.ui.UI;

mstahv / MyUI.java

Created March 21, 2016 10:03

Example how to add lang attribute to Vaadin app

	package org.test;

	import javax.servlet.annotation.WebServlet;

	import com.vaadin.annotations.Theme;
	import com.vaadin.annotations.VaadinServletConfiguration;
	import com.vaadin.server.BootstrapFragmentResponse;
	import com.vaadin.server.BootstrapListener;
	import com.vaadin.server.BootstrapPageResponse;
	import com.vaadin.server.VaadinRequest;

mstahv / settings.xml

Created November 4, 2015 13:08

An example of liferay profile

	<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
	http://maven.apache.org/xsd/settings-1.0.0.xsd">
	<profiles>
	<profile>
	<id>liferay</id>
	<properties>
	<liferayinstall>/Users/mattitahvonenitmill/Applications/liferay-portal-6.2-ce-ga4</liferayinstall>
	<plugin.type>portlet</plugin.type>