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Re: HTDialog ...

From: Henrik Frystyk Nielsen <frystyk@w3.org>
Date: Mon, 22 Jan 1996 14:28:25 -0500
Message-Id: <9601221928.AA14599@www20>
To: moi <vb@goto.fr>
Cc: "'www-lib@w3.org'" <www-lib@w3.org>

I am not sure whether this has reached the list or not - but in case you have 
already seen it then please ignore it - otherwise sorry for the delay :-)

Henrik

moi writes:
> I am using the libwww in Windows so I want to have dialog boxes to prompt user for informations...
> 
> In HTDialog.c there's some functions to redefine so I have done it :

The application can use the predefined versions of the Dialog messages but 
it can also register its own - just like you're doing. The only thing 
that's important is that as they are call back functions they must have be of 
the right type, that is HTAlert_callback which is defined in HTAlert.html. 
There's a bit more information about error handling at

	http://www.w3.org/devel/WWW/Library/User/Using/Error.html

> PUBLIC BOOL PromptDialog (HTRequest * request, HTAlertOpcode op,
> 				int msgnum, CONST char * dfault, void * input,
> 				HTAlertPar * reply)
> {
> 	if (msgnum == HT_MSG_FILENAME)
> 		{
> 		// filename to save
> 		... code to show my dialog box
> 		}
> }
> 
> 
> main (  )
>  {
> 	// .... some code 
> 
> 	HTAlert_add(PromptDialog, HT_A_PROMPT);
> 
> 	// rest of code ...
> 
> }
> 
> Doing that I was hoping to have my dialog box appear when an unknown MIME type was receive but instead all
> goes to an HTBlackHole ... without my box displayed !
> The trace give me this :
> -----------------------
> MIMEParser.. Convert image/x-xbitmap to www/present
> StreamStack. Constructing stream stack for image/x-xbitmap to www/present
> BlackHole... Created
> Read Socket. Target returns 29999
> ---------------------

I can think of four things to check:

1) Have you set the Interactive mode to on in the HTAlert module? Use the 

	void HTAlert_setInteractive (BOOL interactive);
	BOOL HTAlert_interactive (void)

   methods to do this

2) Have you registered a "save locally" stream to dump it to local disk? 
Something like

    /*
    ** This dumps all other formats to local disk without any further
    ** action taken
    */
    HTConversion_add(c,"*/*", "www/present", HTSaveLocally, 0.3, 0.0, 0.0);

3) What does HTAlert_find return? Check what and if it returns soemthing

4) Try and run with all verbose output turned on then you will get information 
by the alert module.


-- 

Henrik Frystyk Nielsen, <frystyk@w3.org>
World-Wide Web Consortium, MIT/LCS NE43-356
545 Technology Square, Cambridge MA 02139, USA
Received on Monday, 22 January 1996 14:28:49 GMT

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