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Thread: QwtText warning: Type conversion already registered from type QString to type QwtText

  1. #1
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    Default QwtText warning: Type conversion already registered from type QString to type QwtText

    I'm using qwt-6.2-git and am getting a warning "Type conversion already registered from type QString to type QwtText" in the terminal when doing the following:

    Qt Code:
    1. QString myString("hello");
    2. QwtText myText(myString);
    To copy to clipboard, switch view to plain text mode 

    I can't find anything in my code that's registering a QString to QwtText.

    Is there a way I can turn off this warning or understand what's causing it?

  2. #2
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    Default Re: QwtText warning: Type conversion already registered from type QString to type Qwt

    Quote Originally Posted by alketi View Post
    I'm using qwt-6.2-git and am getting a warning "Type conversion already registered from type QString to type QwtText" in the terminal when doing the following:

    Qt Code:
    1. QString myString("hello");
    2. QwtText myText(myString);
    To copy to clipboard, switch view to plain text mode 

    I can't find anything in my code that's registering a QString to QwtText.

    Is there a way I can turn off this warning or understand what's causing it?
    The converter is registered here: https://sourceforge.net/p/qwt/git/ci...c/qwt_text.cpp
    Maybe you can use the debugger to find out why it is called twice or if there is another place where such a converter is registered.

    Uwe

  3. #3
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    Default Re: QwtText warning: Type conversion already registered from type QString to type Qwt

    Thanks Uwe. In case anyone has this issue in the future, my problem was statically linking to the qwt library twice within an app. Once in the main tool and a second time in a plugin. I removed the second link (from the plugin) and the warning is now gone.

  4. The following user says thank you to alketi for this useful post:

    d_stranz (2nd September 2022)

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