Re[2]: [help-cgicc] cgicc and Qt

[Igor]

Hello Frank,

Wednesday, March 25, 2009, 3:20:38 PM, you wrote:


That was a correct remark. Each cgicc Element is derived from MStreamable class
which has << operator defined only for std::ostream. That means there
is no << operator that knows how to put HTMLBooleanElement into
QTextStream. But you can write your own operator which would know how
to do it.

example:

 class QTextStream{
   public:
   //just to compile, junk section, if QTextStream knows how to handle
   // std::string, it wouldn't be necessary
           QTextStream& operator << (const string& s){
                   return *this;
           }
   };

   QTextStream& operator << (QTextStream& qs, const cgicc::MStreamable& obj){
           std::stringstream c;
           obj.render(c);
           qs << c.str();
           return qs;
   }
QTextStream qs;
qs << cgicc::a("Send Mail").set("href", "mailto:address@hidden";);


I didn't use QTextStream so there might be a better way to write

std::stringstream c;
obj.render(c);
qs << c.str();

I assumed QTextStream knows how to handle std::string if it is not,
you got to rewrite QTextStream& operator << (QTextStream& qs, const 
cgicc::MStreamable& obj)

 

FB> Hello Igor,

FB> yes , I search something like in the example,
FB> but this will not work.
FB> I get this error when I try to compile it:

FB> error: no match for 'operator<<' in 'ts <<
FB> cgicc::HTMLBooleanElement<cgicc::aTag>(((const std::basic_string<char,
FB> std::char_traits<char>, std::allocator<char> >&)(&
FB> std::basic_string<char, std::char_traits<char>, std::allocator<char>
>>(((const char*)"Send Mail"), ((const std::allocator<char>&)((const
FB> std::allocator<char>*)(&
FB> 
std::allocator<char>()))))))).cgicc::HTMLBooleanElement<cgicc::aTag>::<anonymous>.cgicc::HTMLElement::set(((const
FB> std::string&)(& std::basic_string<char, std::char_traits<char>,
FB> std::allocator<char> >(((const char*)"href"), ((const
FB> std::allocator<char>&)((const std::allocator<char>*)(&
FB> std::allocator<char>())))))), ((const std::string&)(&
FB> std::basic_string<char, std::char_traits<char>, std::allocator<char>
>>(((const char*)"mailto:address@hidden";), ((const
FB> std::allocator<char>&)((const std::allocator<char>*)(&
FB> std::allocator<char>())))))))'

FB> This was my test code

FB> QString Test;
FB> QTextStream ts(&Test,QIODevice::WriteOnly);
FB> ts << cgicc::a("Send Mail").set("href","mailto:address@hidden";);

FB> Thanks for your help.

FB> Igor schrieb:
>> Hello Frank,
>> 
>> Wednesday, March 25, 2009, 11:01:26 AM, you wrote:
>> 
>> FB> Hello Steve,
>> FB> I have look at the docu for the class.
>> FB> But the doc say, that this is for input only,
>> FB> but my problem is the output that must be go
>> FB> into the QTextStream.
>> 
>>     cgicc knows nothing about the output, it is your application
>>     that is responsible for what to do with the output cgicc produces.
>>     You may want to put it to cout or QTextStream or whatever.
>> 
>>     QString str;
>>     QTextStream ts( &str, IO_WriteOnly );
>>     ts << cgicc::a("Send Mail").set("href", "mailto:address@hidden";);
>> 
>>     or you may try to redirect cout to QTextStream
>> 
>> 





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Best regards,
 Igor                            mailto:address@hidden