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Using LGPL Qt and purchasing only one package.

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  • R Offline
    R Offline
    Rufledore
    wrote on last edited by
    #1

    Hello,

    currently I am using Qt under LGPL license. In my company we provide some solutions for our users that are for free, but we'd rather keep our code close. The thing is that I want to use QtCharts in my projects, as it is not under LGPL I would like to purchase it. So here are my questions:

    1. Is it possible to use all the Qt framework and tools under LGPL and to purchase explicitly only one package?
    2. If I want to use it for a release that I will make this year, should I buy it the next year too? Could I continue distribute the already done solution with payed library without purchasing it again and again every year? In other words - is it possible to purchase the package, to do the job and to distribute the ready app next years without purchasing the package again?

    Thank you in advance!

    K Pablo J. RoginaP 2 Replies Last reply
    0
    • R Rufledore

      Hello,

      currently I am using Qt under LGPL license. In my company we provide some solutions for our users that are for free, but we'd rather keep our code close. The thing is that I want to use QtCharts in my projects, as it is not under LGPL I would like to purchase it. So here are my questions:

      1. Is it possible to use all the Qt framework and tools under LGPL and to purchase explicitly only one package?
      2. If I want to use it for a release that I will make this year, should I buy it the next year too? Could I continue distribute the already done solution with payed library without purchasing it again and again every year? In other words - is it possible to purchase the package, to do the job and to distribute the ready app next years without purchasing the package again?

      Thank you in advance!

      K Offline
      K Offline
      koahnig
      wrote on last edited by
      #2

      @Rufledore

      This is a user-driven forum. Your questions related to licensing are very specific and can be answered only by customer department of QT.

      You shall ask them the questions. They re the only ones being able to tell you the exact details and if they are willing to give you a special license.

      Vote the answer(s) that helped you to solve your issue(s)

      1 Reply Last reply
      3
      • R Rufledore

        Hello,

        currently I am using Qt under LGPL license. In my company we provide some solutions for our users that are for free, but we'd rather keep our code close. The thing is that I want to use QtCharts in my projects, as it is not under LGPL I would like to purchase it. So here are my questions:

        1. Is it possible to use all the Qt framework and tools under LGPL and to purchase explicitly only one package?
        2. If I want to use it for a release that I will make this year, should I buy it the next year too? Could I continue distribute the already done solution with payed library without purchasing it again and again every year? In other words - is it possible to purchase the package, to do the job and to distribute the ready app next years without purchasing the package again?

        Thank you in advance!

        Pablo J. RoginaP Offline
        Pablo J. RoginaP Offline
        Pablo J. Rogina
        wrote on last edited by
        #3

        @Rufledore just in case, have you looked at Qwt library?
        It may provide some useful charting capabilities, and it's LGPL licensed.

        Upvote the answer(s) that helped you solve the issue
        Use "Topic Tools" button to mark your post as Solved
        Add screenshots via postimage.org
        Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

        1 Reply Last reply
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