Detecting Zoom Change

rbuser

Hello

On one of my reports, at runtime, I modify the HTML generated by report
builder to put links around charts in my report, see my previous drill down
post.

This works fine, the problem I now have is that if my user changes the zoom
level of the report the html is regenerated. Is there a way that I can tell
this so that I can then put the links back into the new html that gets
generated?

The webtier does not go into the normal process request code when changing
the zoom percentage

Cheers

Paul

nardmoseley

If the parameters passed to the webtier contain a 'zoom' parameter, then the
local html page cache is cleared.

The WebTier keeps a local cache of TppPage objects and a local cache of html
pages. For a zoom request, the WebTier will delete the html page cache. If
the TppPage object does not exist in its local cache, it will request it
from the report server and add it to the cache. Finally the html page will
be generated.


--
Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com

rbuser

Hi Nard

Thanks for this info, but still am not sure how to do what I want to do

I have set up a default action on my webtier which calls my ProcessResponse
procedure. This procedure adds links into the generated html file

My main question is where do I put code for putting these links back into
the newly generated report html page after the cache has been cleared and
the new report html page has been generated?

Cheers

Paul

rbuser

Any ideas Nard?

nardmoseley

A zoom command results in a new html page being requested. The request is
sent to the web module/WebTier, just like all of the other requests. The
request is for a specific page and contains a 'zoom' parameter. The html
page is generated and returned by the WebTier.ProcessRequest method.

To see the javascript that issues the request. Preview a report in a web
browser and perform a View | Source on the toolbar frame.

You can use the Delphi web app debugger to examine the request when it is
sent to the webmodule and webtier.

I think the zoom works much like the page navigation buttons.

--
Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com

rbuser

Hi Nard

I have never been able to debug my web application using the web debugger

I sent you my webtier the other day, is there any chance that you could
change it so that I can debug using the web app debugger?

I dont know where to put the breakpoint within the web tier

Cheers

Paul

nardmoseley

For an example of a using the WebDebugger see
RBServer\Demos\WebTier\WebDebug. The example includes a ReadMe.doc. Open
rbWebModule.pas and place a break point at the line

Response.Content := rsWebTier1.ProcessWebRequest(Request.QueryFields,
Request.Content);





--
Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com

rbuser

hi Nard

My webtier is a dll does this make a difference?

Also, I notice that there are GUIDs within this demo program, how did they
get there?

Cheers

Paul

rbuser

I cant see how this got into the registry, is there a program I have to run
to register my webtier?

nardmoseley

1. Please read the Delphi docs on using the web debugger. They will explain
to you that a web debugger application is a special type of application and
how to convert between it and an ISAPI app. The GUIDS are part of the Web
Debugger app - it uses COM. Again this is all Borlan technology, nothing we
created.

I think the simplest thing to do is to create two applications (one ISAPI,
one WebDebugger) that both use the same WebModule.

Also not that you have to configure the WebTier slightly differently for the
Web Debugger app.

2. The advantage of using the Web Debugger is that it enables you to use the
Delphi debugger to trace your code. However, there are some errors that may
encounter that occur only when you run an app as the ISAPI (particularly
threading issue), since the environments are different.

3. To debug an ISAPI app, I use CodeSite from Raize software.





--
Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com

rbuser

Thanks Nard

I will look into this

I have CodeSite but for some reason the messages I send within the ISAPI app
dont get picked up?

Cheers

Paul

rbuser

Hi Nard

Sorry but this one is really beginning to annoy me now!

I still cannot get my webtier to debug through the debugger

I have created a test application. This does sort of work but the problem I
have now is that I cannot make any modifications to the html page because it
does not exist and at the time of my code getting called all that is in the
directory is a zoom file

I have now tried to use the AfterProcessRequest event and this does not fire

I just cant see why I am getting so much trouble wanting to do something so
simple!

What are the differences between the way that the web tier is configured for
the ISAPI and web debugger app?

Please help as I am losing a lot of valuable time on this now!

Cheers

Paul

nardmoseley

The WebTier.WebModuleURI property value is different for the web debugger. I
think that is the only difference.

Open the the WebModules in the RBServer\Demos\WebTier\ISAPI and
RBServer\Demos\WebTier\WebDebug to compare them.

Try running the above demos, they both should work properly.


--
Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com

rbuser

Hi Nard

Another problem now

I have finally managed to modify the html that is generated after the page
has been zoomed

For some reason the viewer does not show the charts as links? It is running
exactly the same code as it does the first time

I have viewed the source of the 0001.html file and it has link tags in

Cheers

Paul

rbuser

Hi Nard

I have just done view source on the page that has no links and it appears to
be coming from a random filename?

It appears as though even though I have added links into the 0001 file, it
is not being looked at?
Cheers

Paul

nardmoseley

If you would like to modify the RBuilder\Demos\WebTier\WebDebug project to
show a simple example of what you are trying to implement, we can try to
take a look at it here. Email in zip format to
support@digital-metaphors.com.



--
Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com