vaadin8

i calculated the (x1,Y1) and (x2,Y2) and calculated the difference between them (Blue line ) and gave those pixel values to driver to click but i am not able to click on the polygon (Point). 1.First the mouse will go to center of the map where (x1,y1)=(960,520) according to the window but the driver will consider those values as (0,0). 2. Now i need to calculate the offset values from center to each polygon on the map.(x1,y1)=(960,520) and (x2,y2)=(1000,232) the difference between the (x1,y1) and (x2,y2) will give me the distance of the point from center.for ex:(x3,y3) the code below try {

At work, we develop a web application using Vaadin. I am a pretty advanced programmer in Java. I’m experienced with Vaadin as well. But now I've come to a point where information needs to be stored in a user session. Attributes like Locale, Username and so on. In the Vaadin Documentation they are talking about two different types of sessions but I dont really get the difference: VaadinServletService or VaadinPortletService described as low-level customization layer for processing requests. VaadinSession of a UI with getSession() as lower-level session objects. What is the difference and which

Looks like GeneratedPropertyContainer does not exist in Vaadin 8. How can we add a generated column to Vaadin 8 Grid? I appreciate if you can provide an example. If you pass the bean class to the constructure of Grid then it will add all properties as columns to the grid. If you want to only have some properties as columns then don't pass the class to the constructor and add your columns manually like this: grid.addColumn(Address::getStreet); grid.addColumn(Address::getHouseNumber); grid.addColumn(Address::getPostalCode); grid.addCOlumn(Address::getCity); If you want to add a generated column

Ia m new to vVadin. I created one project with grid with two columns but i want to add one Textfield column and one checkbox column and check all checkboxes when click on header checkbox. List<Person> people = Arrays.asList( new Person("Nicolaus Copernicus", 15), new Person("Galileo Galilei", 15), new Person("Johannes Kepler", 15)); TextField txt =new TextField(); CheckBox chk=new CheckBox(); // Create a grid bound to the list Grid<Person> grid = new Grid<>(); grid.setItems(people); grid.addColumn(Person::getName).setCaption("Name"); grid.addColumn(Person::getAge).setCaption("Year of birth");

I am trying to have a auto refresh feature for the grid which basically, updates the grid with latest data from the server every 'n' seconds. I was able to implement the PollListner whenever the user enables Auto-Refresh. UI ui= TestUI.getCurrent(); Boolean value = isRefreshChkBox.getValue(); PollListener listener = e -> { explorer.reloadUI(); }; if (value) { String refreshRateValue = refreshRateTxtField.getValue(); int refreshRate = Integer.valueOf(refreshRateValue); int millis = (int) TimeUnit.SECONDS.toMillis(refreshRate); absUI.setPollInterval(millis); absUI.addPollListener(listener); }