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Thread: Understanding QNetworkConfigurationManager

  1. #1
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    Default Understanding QNetworkConfigurationManager

    Qt Code:
    1. QNetworkConfigurationManager manager;
    2.  
    3. if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired)
    4. {
    5. }
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    Now, when I looked up the documentation for capabilities(), all I got was this:
    Returns the capabilities supported by the current platform.
    from: http://doc.qt.nokia.com/stable/qnetw...l#capabilities

    That is very vague, "which" capabilities exactly are we talking about here?

  2. #2
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    Default Re: Understanding QNetworkConfigurationManager

    They are described here here.

  3. The following user says thank you to Zlatomir for this useful post:

    TheIndependentAquarius (21st September 2011)

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    Default Re: Understanding QNetworkConfigurationManager

    That was helpful, thanks.


    Added after 21 minutes:


    and I am getting "16" with std :: cout << manager.capabilities();

    which is not listed in that list, what is that supposed to mean?
    Last edited by TheIndependentAquarius; 21st September 2011 at 12:15.

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    Default Re: Understanding QNetworkConfigurationManager

    It is listed, capabilities are presented in hexadecimal form.
    So "16" means 0*(16^0) + 1*(16^1) = 0x10 = 0x00000010 = QNetworkConfigurationManager::ForcedRoaming

    You can print hex values with std::cout (if I remember correctly):
    Qt Code:
    1. std::cout << std::hex << number;
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  6. The following user says thank you to stampede for this useful post:

    TheIndependentAquarius (21st September 2011)

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    Default Re: Understanding QNetworkConfigurationManager

    Quote Originally Posted by stampede View Post
    It is listed, capabilities are presented in hexadecimal form.
    So "16" means 0*(16^0) + 1*(16^1) = 0x10 = 0x00000010 = QNetworkConfigurationManager::ForcedRoaming
    Actually I checked the value of 16 in hex through a calculator before posting here, it didn't show 10, I must have used it wrongly, apologies && thanks.

  8. #6
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    Default Re: Understanding QNetworkConfigurationManager

    The int value might not match any of those, because that "flag" value is most likely a combination (not a single value from that list).

    So don't convert that to int, just use it like in the example code you gave: if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequir ed) //see the operator there (is bitwise and - is not logical and)

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