Discovery of printers in the network?

[surwassu]

Hey Guys !!
i am new to qt4.7.2 and i got task to discover no of printers available in your network?
I have read qt docs and got qprinterinfo class having availableprinter() function but can anyone give me idea about how to use it ? i am working on unix platform.

Thanks...
regards ,
Sumit

[high_flyer]

can anyone give me idea about how to use it ?

You just call it!
What is there to explain?
If you know how to call a function, you know how to use it!

[surwassu]

hi wiseguy,
I have searched for programs based on printer but nobody has explain these things properly.I went to Qt
website but no examples are there.If you have any examples please let us know..
regards,
Sumit

[high_flyer]

(my username is high_flyer)
Again - example for what?
you have found the correct function to solve your problem, just use it.
What is your question?

[surwassu]

Hi high_flyer,

I have written code to show one of the available printer name ,I have used QLineText to show printer name
but getting error in following part of code:

void qprint::give_name_of_printer()
 
{   
    QPrinterInfo PrinterInfo;
    QPrinter *printer=new QPrinter(QPrinter::ScreenResolution);
 //line no 33
  QList<QPrinterInfo> pinfo;
//line 34  
QString str;
  pinfo= PrinterInfo.availablePrinters(); // transferring QList into temp list pinfo   
  str=pinfo.value(1).printerName();//value function will return Qprinterinfo object at 2nd location & that object 
                                                  // is used get printer name & stored in CString object
  Name_edit->setText(str);//This is used to set text to printer name
 
}

void qprint::give_name_of_printer()

{   
    QPrinterInfo PrinterInfo;
    QPrinter *printer=new QPrinter(QPrinter::ScreenResolution);
 //line no 33
  QList<QPrinterInfo> pinfo;
//line 34  
QString str;
  pinfo= PrinterInfo.availablePrinters(); // transferring QList into temp list pinfo   
  str=pinfo.value(1).printerName();//value function will return Qprinterinfo object at 2nd location & that object 
                                                  // is used get printer name & stored in CString object
  Name_edit->setText(str);//This is used to set text to printer name

}

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I am getting error as incomplete type and cannot be defined 'class QList<QPrinterInfo>' at line no 33
can you please help me out...

Thanks
Regards,
Sumit

[wysota]

Did you remember to #include the proper header file?

[surwassu]

thanks alot........

[ChrisW67]

You also don't need to create an instance of QPrinterInfo (line 4) in order to use the static method QPrinterInfo::availablePrinters().

[Santosh Reddy]

You code is fine, it will work, may be you missed to include <QList> file, just add it and any other file which is required, you should have it running.

Tip:
when you read the printer name, make sure the list contains the printers on the first hand, else your program will crash

...
    str=pinfo.value(1).printerName(); // this is not suggersted;
...
    if(pinfo.count() > n)
        str=pinfo.value(n).printerName();// get nth printer name
...

...
    str=pinfo.value(1).printerName(); // this is not suggersted;
...
    if(pinfo.count() > n)
        str=pinfo.value(n).printerName();// get nth printer name
...

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remember to post the code in code tags

[surwassu]

Hi Guys,

Is there any API in Qt which will communicate with my print server to discover all printer present in the network???

The function availablePrinters() is giving me locally configured printer details,But I want list of all printer present in the network on my machine..

Plz guide me..
Thank you
Regards,
Sumit

[wysota]

You need to perform the process of service discovery. It differs based on the protocols the printers implement. You can try using zeroonf (http://doc.qt.nokia.com/qq/qq23-bonjour.html)

[surwassu]

Hi guys,

Can you guys please provide some direction on how I can use Bonjour service in Qt app to discover printer devices on the dedicated printer network?
I have used http://doc.qt.nokia.com/qq/qq23-bonjour.html link but can't able to understand properly how to proceed...

can anyone give me good n simple example for this..
please give me somw guidence ..

Thank you
Regards,
Sumit

[wysota]

Please stop multiposting!

What exactly are you having problems with?

[surwassu]

Please stop multiposting!

What exactly are you having problems with?

Extreme apologies my friend ! i should not supposed create another thread for same problem ..sorry
i have already mention my problem in my previous post
regards,
sumit

[squidge]

There are examples included in the link. If you do not understand the examples, which part are you having problems with? Saying "can't able to understand" is too vague.

[surwassu]

There are examples included in the link. If you do not understand the examples, which part are you having problems with? Saying "can't able to understand" is too vague.

Hi ,
Good morning to all!

I have gone through this link http://doc.qt.nokia.com/qq/qq23-bonjour.html (topic:Storing a Bonjour Entry).

Can anybody tell me why they have use Q_DECLARE_METATYPE(BonjourRecord)?The explaination given by them is not understandable.

Also why they have use reply domain?what does it mean?what is use of that?

Please guide me.
Reagds,
Sumit

[wysota]

Can anybody tell me why they have use Q_DECLARE_METATYPE(BonjourRecord)?

Because it allows to store objects of BonjourRecord class into QVariant.

Also why they have use reply domain?what does it mean?what is use of that?

Read about how zeroconf works and you'll understand that.

[surwassu]

Because it allows to store objects of BonjourRecord class into QVariant.


Read about how zeroconf works and you'll understand that.

Hi Master,
I have gone through that code n downloaded source file it contails three folder .
Do you have any idea about how to should I proceed to execute it on unix ?
Thanks.
Regards,
Sumit

[wysota]

Come on. Read the readme file.

[surwassu]

Come on. Read the readme file.

Do you have any idea from where i can get QPrintDialog class's Source code?