browser or tab close

[jahlxx]

Hi.

I need to prevent data lose when a user close the browser or the tab where de unigui app is running.

I'm trying some options.

One of them is in MainModule, the event OnBrowserClose. Tee event is detected, but don`t executes my code.

Any idea and / or help?

 

Thanks

[jahlxx]

Hi.

 

Is there any way to control this?

 

Thanks.

[Sherzod]

On 3/30/2019 at 1:01 AM, jahlxx said:

Tee event is detected, but don`t executes my code.

Hi,

What code is not executed, can you clarify?

[jahlxx]

Well.

procedure TUniMainModule.UniGUIMainModuleBrowserClose(Sender: TObject);
begin
   if formdata.haycambios then
      //MessageDlg('Hello);
      MessageDlg('There are changes Do you want to update them ?', system.uitypes.TMsgDlgType.mtconfirmation, [system.uitypes.TMsgDlgBtn.mbYes, system.uitypes.TMsgDlgBtn.mbNo, system.uitypes.TMsgDlgBtn.mbCancel], formdata.update_data);
end;

 

Don't raises the dialog, and don`t executes the formdada.update_dada procedure

 

Thanks

[neo4a]

UniGUIMainModuleBrowserClose() is called right after browser or tab is already closed. Not before.

[jahlxx]

Ok.

Then, how can I do what I need to do?

Thanks.

[neo4a]

Unless you havn't full control over the browser app window, there is no reliable method.

[Sherzod]

7 minutes ago, jahlxx said:

Then, how can I do what I need to do?

Hi,

Immediately run the code or warn the user:

UniMainModule -> BackButtonAction = bbaWarnUser

 

[jahlxx]

Ok. THis wran the user.

 

But how can I execute my code?

 

[Sherzod]

2 hours ago, jahlxx said:

But how can I execute my code?

Sorry, how or where?

You can use the MainModule -> OnDestroy event for this I think (without MessageDialogs of course)

[jahlxx]

Ok.

Can I change UniMainModule.BackButtonAction in runtime? I could set by default to bbaDoNothing, and set to bbWarnUser if the user has done some changes .

If yes, how? And how can I change the default message?

With this, I almost have what I need.

Thanks.

 

[jahlxx]

Hi.

 

Answer myself. Yes, I can change UniMainModule.BackButtonAction  in run time.

But, how can I change the message text?

Thanks

[Sherzod]

14 minutes ago, jahlxx said:

But, how can I change the message text?

https://www.w3schools.com/jsref/event_onbeforeunload.asp

[jahlxx]

Sorry, I need more details.

What object must I use?

Any sample please?

I only want to change the message text.

Thanks.

 

[Sherzod]

24 minutes ago, jahlxx said:

I only want to change the message text.

The default message that appears in the confirmation box, is different in different browsers. However, the standard message is something like "Are you sure you want to leave this page?". This message cannot be removed.

However, you can write a custom message together with the default message. See the first example on this page. 

Note: This only works in Internet Explorer.

https://www.w3schools.com/jsref/event_onbeforeunload.asp

[Sherzod]

...

[jahlxx]

Ok. Thanks.