BrowserWindowOpener with Button click event

Hi,

I am using Vaadin 7.6.5

Trying to open a BrowserWindowOpener as Popup when button is clicked with following code

Button button = new Button("Open");

BrowserWindowOpener opener = new BrowserWindowOpener(MyUI.class);
opener.setFeatures("height=700,width=600");
opener.setResource(new FileResource(new File("G:/New folder/test1470048449513.pdf")));
opener.setWindowName("PDF");
opener.extend(button);

it works fine for me , i need to open the BrowserWindowOpener based on some condision(ie i need to do two things check the file first and open BrowserWindowOpener ) when button is clecked so how can i do this code inside buttopn click listener.

Thanks
Nagaraj RC

Hi,
if you extend a Button with BrowserWindowOpener then a click handler will be added on the client side 
so new window will be opened before your server side click listener is invoked.

If your need is to have a dynamic content generated on button click you can either implement a custom StreamSource and give it to a StreamResource or even extend StreamResource and override getStream or getStreamSource;
then you can initialize your BrowserWindowOpener with this StreamResource.
There are a lot of post regarding this argument on the forum.

Instead if you want to have your listener code inovked before window open take a look at this post ;
in this solution the click listener on client side does nothing and the window is opened at the end of the request generated by clicking the button, but this requires a widgetset recompilation.

HTH
Marco

Hello!

I'm here to tell that the below code, using button ClickListener event and setResource from BrowserWindowOpener worked fine for me:

final BrowserWindowOpener browserWindowOpener = new BrowserWindowOpener(resource);
downloadButton.addClickListener(listener -> {
	StreamSource newSource = getStreamSource(simulationStockComboBoxFilter, defaultValue); //my custom StreamSource getter
	StreamResource newResource = new StreamResource(newSource,
			fileNameBeginning + formatter.format(LocalDateTime.now()) + ".xls");
	newResource.setMIMEType("application/vnd.ms-excel");
	browserWindowOpener.setResource(newResource);
});
browserWindowOpener.extend(downloadButton);

IMPORTANT: One thing that is mandatory for this to work is to use different filenames for every downloaded file, so that we don't use the cache.