Solved

IWForm - OnClose effect

Posted on 2010-11-20
4
753 Views
Last Modified: 2013-11-23
I have something I need to do when a uses leaves the page.. (maybe the site too)
I tried the OnDestroy but it does not get triggered.
Any idea on how to implement this ?

Something like:
procedure TmainForm.OnClose( sender: TObject);
begin
  callSomeSillyLittleProc(param);
end;

TIWUserSession can NOT USED! since it requires hugh overhead (too many users)

TIA
0
Comment
Question by:controlr
  • 2
  • 2
4 Comments
 
LVL 24

Expert Comment

by:jimyX
ID: 34181363
The OnDestroy gets triggered when you call release:

 
procedure TformMain.IWButtoncloseClick(Sender: TObject);
begin
  Release;
end;

procedure TformMain.IWAppFormDestroy(Sender: TObject);
begin
  callSomeSillyLittleProc(param);
end;

Open in new window



But if you close with WebApplication.Terminate then you can think of something like this (smart but not the best):
Make "callSomeSillyLittleProc(param)" a function that returns a string rather than a procedure;
pass it as a parameter to WebApplication.Terminate(callSomeSillyLittleProc(param));
Make sure the function is returning blank (Result := '');

uses SysUtils; //for inttostr

function TformMain.callSomeSillyLittleProc(i,j:integer; str:string):string;
begin
  WebApplication.showmessage(IntToStr(i+j) +' '+ str);
  Result := '';
end;

procedure TformMain.IWButtonCloseClick(Sender: TObject);
begin
  WebApplication.Terminate(callSomeSillyLittleProc(3,1,'closed, Goodbye!'));
end;

Open in new window

0
 

Author Comment

by:controlr
ID: 34182297
JImmy...
The user does not hit any button.. .. he simply closed the browser.. (CTRL+F4) and does not have any interaction with the page.

THerefore.. there is never a call made to release.. and thus (like i said) the destroy does not get triggered.

There should be a onTerminate events that gets triggered when browser is closed or the user goes to another URL.... but   I think its handles in teh Session timeout and there is no way to intercept it..  maybe eBob has a trick :)
0
 
LVL 24

Accepted Solution

by:
jimyX earned 500 total points
ID: 34182682
I do not think IW can get that done without Javascript code with it.

Have a look on this site (scroll down to the part "Implementing the Browser Close Detection"):

http://robertcram.blogspot.com/
0
 

Author Closing Comment

by:controlr
ID: 34184717
i can use that :)
Thanks!
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question