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why any widget Qt opensource has a specail license?

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licensewidgetsqt 5.4
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  • stackprogramerS Offline
    stackprogramerS Offline
    stackprogramer
    wrote on last edited by stackprogramer
    #1

    hi,when i examine Qt widgets ,i saw any widget has a special license .like these product:

    QtCore:
    QSegfaultHandler BSD-style
    QUrl Modified BSD
    DES MIT
    EUC-JP Text Codec BSD-style
    QtGui
    QImage BSD
    FFTReal LGPL
    for more info license:
    http://doc.qt.io/qt-5/licensing.html

    it is not struggle for users that using different Qt widget?
    i am not a lawyer,only i want to know:how much i am free in using Qt opensource widgets?why the widgets aren't unified in license

    thanks for reply

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi,

      It's explained in the document you linked: because Qt uses code written by other for certain things.

      What do you mean by "how much am i free" ?

      What non-unified license did you find in the Qt Widget module ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      stackprogramerS 1 Reply Last reply
      0
      • SGaistS SGaist

        Hi,

        It's explained in the document you linked: because Qt uses code written by other for certain things.

        What do you mean by "how much am i free" ?

        What non-unified license did you find in the Qt Widget module ?

        stackprogramerS Offline
        stackprogramerS Offline
        stackprogramer
        wrote on last edited by stackprogramer
        #3

        @SGaist
        for example :
        i want to develop a game in Qt with using different widgets.
        it is possible that i published it closed source!?
        or we s when using a widget with GPL licenese,we should publish it opensource?
        thanks for reply

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #4

          Qt's sources are covered by the same set of license, GPL, LGPL and Commercial. There's no one widget with a license and another with another license.

          You have to choose which license you want to use with your project and then abide by its rules. The commercial license being only available once you bought it.

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          1 Reply Last reply
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