[Qt-interest] QWebView linkClicked(url) always null?

[Israel Brewster]

Is there any way I can debug the Qt source? Such that I can see  
exactly what is being passed to the linkClicked signal? The question  
here is if the signal is being emitted with a null object, or if  
somehow the slot is "loosing" the object. Neither one seems likely,  
but it's got to be something.

On Nov 28, 2009, at 10:03 AM, Israel Brewster wrote:

> Some additional info:
>
> Just to clarify, when I say NULL QUrl, I mean the address of the  
> QUrl object is NULL, not that I have a valid QUrl object with a NULL  
> url or the like. This means that I can't even check for this case in  
> my code, because even something like calling QUrl.isValid() will  
> cause a crash-since there is no QUrl object to call it on.
>
> These same links that cause problems, when I have linkDelegation  
> turned off, load fine in the QWebView, so I know they are valid  
> links. There is nothing special about the HTML that creates the link  
> either - for example, one of the links is defined thus (if the code  
> makes it through):
>
> <a href="http://mactimeclock.sf.net/">webpage</a>
>
> so nothing fancy there. So I'm at a total loss as to why the signal  
> would be emitted with a NULL QUrl. At least I assume the problem is  
> on the emitting side- I can't think of anything that would cause the  
> slot to drop the argument passed to it.
>
> This is now using the pre-compiled Qt 4.5.3 binaries to eliminate  
> any possible problems from the way I compiled- they won't work for  
> deployment of my application, but there fine for testing certain  
> portions.
>
> Thanks for any help that can be provided!
>
> On Nov 27, 2009, at 5:23 PM, Israel Brewster wrote:
>
>> I have the following code in my program:
>>
>>  QWebView * helpWindow=new QWebView;
>> .
>> . //find the file to load here
>> .
>> helpWindow- 
>> >load(QUrl("file://"+documentationLocation.absolutePath()));
>> helpWindow->page()- 
>> >setLinkDelegationPolicy(QWebPage::DelegateExternalLinks);
>> connect 
>> (helpWindow 
>> ,SIGNAL(linkClicked(QUrl)),this,SLOT(externalLinkClicked(QUrl)));
>>
>> This much seems to work well, and when an external link is clicked,  
>> the function externalLinkClicked(QUrl) is called. However, for some  
>> reason the QUrl is invariably null - which, of course, causes  
>> problems the moment I try to do anything with it. What am I missing  
>> here? How can I get the signal to actually pass the URL? Thanks.
>> -----------------------------------------------
>> Israel Brewster
>> Computer Support Technician II
>> Frontier Flying Service Inc.
>> 5245 Airport Industrial Rd
>> Fairbanks, AK 99709
>> (907) 450-7250 x293
>> -----------------------------------------------
>>
>> <Israel Brewster.vcf>
>>
>> _______________________________________________
>> Qt-interest mailing list
>> Qt-interest at trolltech.com
>> http://lists.trolltech.com/mailman/listinfo/qt-interest
>
> -----------------------------------------------
> Israel Brewster
> Computer Support Technician II
> Frontier Flying Service Inc.
> 5245 Airport Industrial Rd
> Fairbanks, AK 99709
> (907) 450-7250 x293
> -----------------------------------------------
>
> <Israel Brewster.vcf>
>
> _______________________________________________
> Qt-interest mailing list
> Qt-interest at trolltech.com
> http://lists.trolltech.com/mailman/listinfo/qt-interest

-----------------------------------------------
Israel Brewster
Computer Support Technician II
Frontier Flying Service Inc.
5245 Airport Industrial Rd
Fairbanks, AK 99709
(907) 450-7250 x293
-----------------------------------------------



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