Vaadin 7 how to ask browser for download diretory

NOTE : While I feel that Vaadin is a superior Web framework, and R remains my tool of choice for mathematical statistics, the development of this package has been stalled for quite a while. The reason for this is purely lack of free time. Feel free to fork this repository and use RVaadin if it fits your needs.

I thank my former employer VTT for funding this work. RVaadin is quite complete when it comes to showing static R-generated graphics either png or svg with Vaadin. For interactive graphics, I propose combining a suitable JavaScript library g. Whereas the Vaadin framework is excellent for writing full-blown Java EE Web applications, the R language provides superior flexibility for custom algorithm development - and a large selection of ready-made routines from the vast CRAN package repository.

The RVaadin library is intended to be used when the production standards for serving Web pages are high, but the R language is used for both quick prototyping and the final implementation of the sophisticated computational methods and graphics.

Thus, a single user can have. It is published under Apache 2. You can also follow the detailed instructions for Ubuntu LTS Figure 1. An example output from the the RVaadin test program. The expected value of the normally, identically and independently distributed sequence is 0. Because of the large standard deviation, the cumulative sum turns negative quite often.

So far, we have only seen the eval String method of the RContainer class, which takes an R expression as a Java String and evaluates it in the R session. I'm new to Intellij and haven't developed the commitment to it that others have, so I'm not sure which way I'll end up going, but I'll keep you up to date.

The UserDetailComponent is the java class that implements the interface shown above. Below is the class constructor:. The Vaadin IDE-generated code is invoked to initialize the view per the visual design. The Labels are updated to clear out the initial values. The userPortrait is an Embedded component that will be used to show the user portrait; if the user doesn't have a portrait, the basic male portrait will be used, and that's what we initialize the value to.

Using this type of component, we will be able to show the real user portrait the user might have loaded to their profile. The style of the Back button is changed to a link, basically it will look like a hyperlink.

A click listener is also added to deal with clicks on the link. Inside the click listener, we get the UI instance the component is bound to our UsersUI instance and the switchToListView method is invoked to handle the switch.

In Vaadin, the UI instance is accessable to every component that is added to the heirarchy. This makes the class a great extension point to add utility methods or manage navigation. When switching to the detail view, the component needs to update with information for the user. Here's the method:.

This method does what it says, it returns the current ThemeDisplay instance that is needed to get the portrait URL. This method will come up later. The UserListComponent is used to display the list of Liferay users. It too was laid out using the Vaadin IDE in Eclipse, and that code was used in Intellij as the foundation for the class. I just had to add the code to initialize the table:.

The LiferayUsersComponent manages the tab widget with our two views as tab pages the tabs themselves are hidden. This component was also laid out using the Vaadin IDE in Eclipse, and the generated code was copied to Intellij to edit. I didn't really change any code in this class, however, I just added two utility methods for switching to selected tabs:. Since the UsersUI class is pretty small, it will be presented in whole:.

We start with the Theme annotation. This informs Vaadin that the given Vaadin theme should be used for the UI and all of it's components. Note this is the Vaadin theme, it is not a Liferay theme.

To see what Vaadin themes are available, you can use the Vaadin 7 Control Panel and use the Themes tab:. Because I generate a file which displays the current view or the content of a table table data is changing while the server is running on the server.

I'd like to delete it on the server as son as the download is finished. Important Notice - Forums is archived To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow.

Vaadin Forum 3. Vaadin 6, 7, 8 Framework UI. How to Download a File Just Created. Connect and share knowledge within a single location that is structured and easy to search.

I made a taable which has its data source set to a BeanItemContainer. Each bean has a name String and a byte[] which holds a file converted to a byte[].

I added a button to each row which is suppose to download the file by first converting it to a pdf. I am having trouble implementing the downloading part here is the code relating:. Generated columns creation is well described in Book of Vaadin , one correction to your code would be to check columnId or propertyId to ensure you create a button in right column - currently it seems you return a button for any column.

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