I am currently working on a GWT application that requires report
printing. The use can select report parameters from a screen, and
upon clicking print we would like to display the file as it is being
generated. Currently we have server side code that is generating HTML
and writing it to a file. When the user clicks print, an RPC is being
made to pass the report parameters to the server and begin the
report. A second RPC is made after the report has started to obtain
the report's URL. From here, we are creating a Frame and setting the
URL to be the URL retrieved by the second RPC.
The issue I am running into, is that when setUrl gets
called, it only displays as much HTML that was contained in the file
at the time of the call. What would be the best way to refresh just
the frame containing the HTML report? It appears making subsequent
calls to setUrl passing in the same Url each time would do the trick,
but it actually doesn't seem to contain the additional content that
would've been written since the last call. It is also resetting the
vertical scroll bar's position each time back to the top of the bar
which is something else I would like to prevent.
Is there a better way to go about doing this?
I think it would be better to request HTML in chunks from GWT and render them as they arrive. Doing this with ajax instead of wholesale refreshes will enable better behavior with the scrollbar, eliminate flashing, get around caching problems, and will also let you add some feedback like a progress bar, estimated time remaining, etc.
There's a lot more infrastructure required for this, but your suggested solution doesn't seem quite appropriate for the task.
Related
I'm trying to build a way to update a user profile one question at a time.
Essentially I want a div on my page that displays a form that lets the user submit the most important information, say firstname. When that has been filled out (success on the form) I want to refresh that div and show the second most important form, for say lastname, or if that is already filled in then birthday and so on.
Much like linkedin prompts you to add one more piece to your profile.
How would you do it?
My first thought was to use elements. But I need to fetch existing profile data to populate the form and how would the element get that data, abusing requestAction is not an option.
So I guess I in that case need to call a controller action that determines which element should be rendered, renders it to a variable and submits that (response->body) in json to the js that updates the page. Seems a bit .. unclean but should work.
Then we have view cells. They seem ideal for the task until I want to call them via ajax. That is not possible right?
So how would you go about to build something like that?
A form that needs to have the ability to be prepopulated with data if there is any and then refreshed automagically to display the form for the next piece of info needed.
View cells can't really be used in AJAX requests. This is not what they thought for.
The best thing you could do, if you want to keep the cell, is to make sure you followed SoC properly and put all your business logic into the model layer.
Now have a separate controller and action that is reachable from the outside throught a request (a cell is not) and return the data as JSON from there using the same code.
You could try to instantiate the cell in the controller action as well and send it's output. But honestly, I think that's a pretty fugly way of doing it.
I have a very simple scenario. A web page with a list of items which invokes ajax call upon clicking on any item and dynamically add some text to the page.
Now, obviously, if I leave this page and then I press the back button I get the initial list without all the dynamically added text.
I've been reading a lot about this issue. There are a many tricks to preserve the information and/or load it again from server. But it seems to me that this really simple and desired behaviour should have a simple solution without the need for any trick or server re-loading which will result in obvious noticeable delay for the user.
So, does anyone know about a simple way to get back to the page via back button and retain all the dynamically added parts without the need to load them again from the server?
My clients have upwards of 40 reports with very similar parameters. These are hosted on SharePoint, but are consumed by users through a web application, and so when a report is selected and the parameters are shown, the report's title is lost. My clients are irritated that they don't know, from the parameters page, which report is being displayed (many have very similar names and they are selected from a grid, and so mis-clicking is an issue)
Is there some trick to showing the report title on the parameters page?
Thanks
Edward
I will suggest to add an additional parameter and show the report name in that.
Some points to highlight in your question.
First, I don't know any trick for showing the title in the parameter pane, as a matter of fact, I don't believe it does exist. Showing it as a parameter is something that I wouldn't do as a solution for a customer.
Second, not showing the little line with the report's path is something that can be chosen when invoking the report (by means of url, see links below) and if they are accessing through another web application, this should be the one taking care of this matter. Note that if you show the url or the little line with the path, you can compromise security (access will depend on folders setup, but you leave a door open). This web application should know what is it showing and should display the right name (any the actual report's name or a custom name within the web app). This is what happens when you embed SSRS reports using a browser in an external app.
Third, the report itself should have a title displayed once the report is executed.
As a summary, I don't believe this issue's solution is under SSRS management/development scope.
Links to know more about executing SSRS with an URL.
http://msdn.microsoft.com/en-us/library/ms155391.aspx
http://msdn.microsoft.com/en-us/library/ms155391.aspx
As you can see, there are lots of things that you can do playing around with the url, such as:
Pass parameters
Hide path pane
Hide parameters pane
Render format, you can call an url asking for an excel or pdf render and you get the download dialog for the file.
Hope this helps.
I'm trying to write a very simple client application for iOS to go to a website with three buttons. Each of these buttons load a different webpage and run a command in an application on the server, takes the results from that command and displays them on a map on the very same page that the button loaded.
What I'm trying to achieve is to be able to do the following:
Click on one of the three buttons.
Have it then run the query.
JUST PULL THE DIV WITH THE MAP TO SHOW THE DATA instead of the entire page, which is what I currently have happening.
I was going to go about this by parsing the html with "libxml2" and "hpple" but I thought that I would ask here before I got started instead of spending a few days on this to realise that I am going about it the wrong way.
So with all of that said I guess my main questions are:
Is this possible?
Is the way I'm going about it correct?
2a. If the way I am going about it is wrong, how best should I go about it?
Normally on the webpage the map, that I am trying to pull, updates dynamically every second or so. In order to make the map dynamic in my application will I have to poll the site every time I want the map to update? or will it automatically update?
I'm wracking my brain on this one.
After an HTML document loads in a browser, I want to be able to monitor
the page in case any content on it changes for any reason.
Is there a Javascript function with which I can track 'what has
changed' on the webpage. This should be irrespective of the type of content on the HTML page.
I have two examples for you to ponder on:
Ex1:
Say in an HTML document there are two select boxes s1 and s2.
The items list in s2 depends on selections in s1 (page is not
refreshed — that is, s2 is loaded through Ajax or something).
So after the HTML page loads I need to get a notification whenever s2
is populated...
Ex2:
Say, in an HTML page, there's a link, Onclicking which a light pop-up
div is created with some text.
How can I capture the content of this dynamic pop-up?
In all this discussion, I'm not taking into account any particular
format of HTML...the HTML content can be anything...I just need
to keep tracking if any content changes after the page loads...
Ideally I need to achieve this using JavaScript (client-side
scripting).
How can I achieve this?
You can keep track of changes in a textbox using onkeyup. This will tell you every time someone makes a change in a given textbox.
This could potentially fire alot of events. However, using onblur won't necessarily tell you about changes in the textbox and onchange's browser coverage is spotty at best.
If you are using AJAX, you could setup the response function to handle a home grown "event listening" system. So after the response does what it needs to do, it could call any methods that were registered with it, passing in the response text when necessary.
So from your examples above, in Ex1, when the AJAX returns from S1, it would load S2, then call a method saying S2 had changed. In Ex2, when the new AJAX returns the DIV's contents, after loading it into the DIV, it call a different method (or possibly the same depending on what your trying to do) and alerts it that the DIV has new contents.
You could set your "watcher" script as a timer, running a diff function on the current document.body.innerHTML and a stored version captured on load. Depending on how fast the diff will run will give you an idea on what timer interval to use.
This may not capture changes in form elements, but for those, it's easier to loop through all form elements in every form on the page.
Here's someone's diff function I found on Google: http://snowtide.com/jsdifflib