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static const QFont using QFontDatabase?

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  • SeeLookS Offline
    SeeLookS Offline
    SeeLook
    wrote on last edited by
    #2

    You may init any static member after font is loaded.

    P 1 Reply Last reply
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    • SeeLookS SeeLook

      You may init any static member after font is loaded.

      P Offline
      P Offline
      Pippin
      wrote on last edited by
      #3

      @SeeLook I'm sorry what? I'm not sure I understood what you were trying to say. Keep in mind that I'd like the static member to be const.

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

        Hi,

        Why do you need a static QFont ?

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        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • SGaistS SGaist

          Hi,

          Why do you need a static QFont ?

          P Offline
          P Offline
          Pippin
          wrote on last edited by
          #5

          Hi @SGaist,

          Basically I need a global variable, and I don't intend to change it once I declared it.

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #6

            That's what I thought but what would be the use of that global QFont ?

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            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • SGaistS SGaist

              That's what I thought but what would be the use of that global QFont ?

              P Offline
              P Offline
              Pippin
              wrote on last edited by Pippin
              #7

              @SGaist It would be used whenever a few functions are run. I'm just trying to load it once and for all, rather than load it every time these functions are called. The use is drawing texts on a QImage.

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #8

                Are these functions in separated classes ?

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                • P Offline
                  P Offline
                  Pippin
                  wrote on last edited by
                  #9

                  No they are all in that same class.

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #10

                    Then why not just make it a member and load it at construction time ?

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                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                    • SGaistS SGaist

                      Then why not just make it a member and load it at construction time ?

                      P Offline
                      P Offline
                      Pippin
                      wrote on last edited by
                      #11

                      @SGaist I could do that, but it's the same font for all instances. So it would be kind of a waste of space.

                      kshegunovK 1 Reply Last reply
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                      • SeeLookS Offline
                        SeeLookS Offline
                        SeeLook
                        wrote on last edited by
                        #12

                        Simply add static init() method to the class where private static QFont is done and give access to it through const method

                        QFont myFont () const { return m_font;  }
                        
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                        • P Pippin

                          @SGaist I could do that, but it's the same font for all instances. So it would be kind of a waste of space.

                          kshegunovK Offline
                          kshegunovK Offline
                          kshegunov
                          Moderators
                          wrote on last edited by
                          #13

                          @Pippin

                          So it would be kind of a waste of space.

                          Hello,
                          I suggest answering these two questions for your own peace of mind:

                          1. How much space would you expect to save if you put it in a static variable?
                          2. What do you gain or lose by making it a static and is it worth the effort (in work time/planning time)?

                          Kind regards.

                          Read and abide by the Qt Code of Conduct

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