Re: How to stall GWT app while it is writing file in background? Timer object??

See http://groups.google.com/group/google-web-toolkit/browse_frm/thread/2bc7750aa72470f5/9afa4441d4fcceb0

In the 3rd message, I describe how I do something similar using a
hidden frame as my download target.

On Feb 1, 3:30 pm, Joshua Carey <jc11...@gmail.com> wrote:
> Hi Mark,
>
> Your suggestion worked perfectly, except for one small thing.  For some
> reason moving the Window.open from the button click event, to the onSuccess
> method, now creates a "pop up" window, instead of a new tab..  Its weird
> because they are both being executed within the presenter class so i'm
> unsure why its doing that.  Also since its now making a popup instead of a
> new tab, google chrome setting need to be changed to allow popups.  Do you
> know why moving window.open would all of a sudden make a pop up instead of
> a new tab?
>
> Thanks,
>
> Joshua
>
>
>
>
>
>
>
> On Wed, Feb 1, 2012 at 1:41 PM, Mark <mdshol...@gmail.com> wrote:
> > The whole idea between AJAX is asynchronous operation, the client
> > continues working while the server does work.  There's no telling how
> > long the server will take to do its work so a Timer is not the best
> > option.  Since you want the client to react when the server finishes
> > you need to pass the workload to the server method and pass an
> > AsyncCallback object.  In that object you put your Window.open() call
> > in the onSuccess() method.
>
> > Hope this helps.
>
> > On Feb 1, 1:52 pm, Joshua Carey <jc11...@gmail.com> wrote:
> > > I have a gwt application that calls a gwt servlet (from my presenter
> > class)
> > > to write a PDF file to disk, then in my presenter class I display the
> > newly
> > > created PDF using Window.open("my.pdf");.  The problem is that the
> > > window.open executes before the pdf is finished writing to disk.  I would
> > > like to know if there is a way to stall any further statements from
> > > occurring until the pdf is finished writing.  Or is there a way to use
> > some
> > > sort of timer object that waits 5 seconds or more while the PDF is  being
> > > created?  It would be nice to prompt the user a message box that says
> > > "please wait while PDF is retrieved" and then when the PDF is finished
> > > writing, we could automatically close the message box and execute the
> > > window.open("my.pdf") command.  Here is the lines of code in the
> > presenter
> > > class:
>
> > > ButtonCell genericButtonCellType = new ButtonCell();
> > > FieldUpdater<EOMDocument, String> previewUpdater = new
> > > FieldUpdater<EOMDocument, String>()
> > > {
> > > @Override
> > > public void update(int index, EOMDocument object, String value)
> > > {
> > > if (object.getByteBlob() == null) {
> > > Window.alert("Sorry but the PDF you are requesting from the database is
> > > empty. Please select another PDF to view!");} else {
>
> > > eventBus.writePdf(object.getByteBlob(), object.getIdocNumber());
> > >         String blobURL =  GWT.getHostPageBaseURL() + "sp_pdf/" +
> > > object.getPreviewBlobPath();
> > >         Window.open(blobURL, "Search And Preview - PDF Review", null);
>
> > > }
> > > }
> > > };
>
> > > Thanks for the help.
>
> > > Joshua
>
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