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Custom Time

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  • SGaistS SGaist

    Hi and welcome to devnet,

    One way would be to store the delta between the time set by the user and the system time and recalculate the value when updating.

    N Offline
    N Offline
    nanamo
    wrote on last edited by
    #3

    @SGaist thanks for the very quick reply.
    So basically implement as the code above but add or subtract an offset to the currenttime depending on the user input?

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

      That's one way to do it yes.

      Out of curiosity, what is your goal with allowing people setting arbitrary time ?

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

      N 1 Reply Last reply
      0
      • SGaistS SGaist

        That's one way to do it yes.

        Out of curiosity, what is your goal with allowing people setting arbitrary time ?

        N Offline
        N Offline
        nanamo
        wrote on last edited by
        #5

        @SGaist it's a project I'm working on where there is the option to set time and date within settings.
        The tablet it is been used on may not have internet access.

        So I though whatever they set it to I'll just start my clock from there.
        Kinda new to this. Is there a better way do you think?

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

          That still feels strange. Why would the user not change the system time in that case ?

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

          N 1 Reply Last reply
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          • SGaistS SGaist

            That still feels strange. Why would the user not change the system time in that case ?

            N Offline
            N Offline
            nanamo
            wrote on last edited by
            #7

            @SGaist it will be running on a windows based tablet.
            I didn't want to mess with the system time but do
            You think this would be the way to go?

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

              Then question should rather be: why do you need that modified time in the first place ?

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

              N 1 Reply Last reply
              1
              • SGaistS SGaist

                Then question should rather be: why do you need that modified time in the first place ?

                N Offline
                N Offline
                nanamo
                wrote on last edited by
                #9

                @SGaist Does not every app come with an option to alter time and date?
                I have the user set time and date been accepted
                Just need to know how to alter the app clock to this new time as right now the app clock is reading currenttime()

                JKSHJ 1 Reply Last reply
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                • N nanamo

                  @SGaist Does not every app come with an option to alter time and date?
                  I have the user set time and date been accepted
                  Just need to know how to alter the app clock to this new time as right now the app clock is reading currenttime()

                  JKSHJ Offline
                  JKSHJ Offline
                  JKSH
                  Moderators
                  wrote on last edited by
                  #10

                  @nanamo said in Custom Time:

                  Does not every app come with an option to alter time and date?

                  I'm not aware of any apps that provide this option. Can you give an example?

                  Just need to know how to alter the app clock to this new time as right now the app clock is reading currenttime()

                  When your user sets a custom time, calculate the difference between the custom time and the system clock (QTime::currentTime()). Record this difference (also known as the offset).

                  Then, whenever you need to calculate or display the time, add the offset to the system time: QTime::currentTime().addSecs(offset).

                  Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                  N SGaistS 2 Replies Last reply
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                  • JKSHJ JKSH

                    @nanamo said in Custom Time:

                    Does not every app come with an option to alter time and date?

                    I'm not aware of any apps that provide this option. Can you give an example?

                    Just need to know how to alter the app clock to this new time as right now the app clock is reading currenttime()

                    When your user sets a custom time, calculate the difference between the custom time and the system clock (QTime::currentTime()). Record this difference (also known as the offset).

                    Then, whenever you need to calculate or display the time, add the offset to the system time: QTime::currentTime().addSecs(offset).

                    N Offline
                    N Offline
                    nanamo
                    wrote on last edited by
                    #11

                    @JKSH Brilliant, thanks a lot

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                    • JKSHJ JKSH

                      @nanamo said in Custom Time:

                      Does not every app come with an option to alter time and date?

                      I'm not aware of any apps that provide this option. Can you give an example?

                      Just need to know how to alter the app clock to this new time as right now the app clock is reading currenttime()

                      When your user sets a custom time, calculate the difference between the custom time and the system clock (QTime::currentTime()). Record this difference (also known as the offset).

                      Then, whenever you need to calculate or display the time, add the offset to the system time: QTime::currentTime().addSecs(offset).

                      SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #12

                      @JKSH said in Custom Time:

                      @nanamo said in Custom Time:

                      Does not every app come with an option to alter time and date?

                      I'm not aware of any apps that provide this option. Can you give an example?

                      Just need to know how to alter the app clock to this new time as right now the app clock is reading currenttime()

                      When your user sets a custom time, calculate the difference between the custom time and the system clock (QTime::currentTime()). Record this difference (also known as the offset).

                      Then, whenever you need to calculate or display the time, add the offset to the system time: QTime::currentTime().addSecs(offset).

                      The coded version of what I suggested in my first answer ^^

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

                      N JKSHJ 2 Replies Last reply
                      3
                      • SGaistS SGaist

                        @JKSH said in Custom Time:

                        @nanamo said in Custom Time:

                        Does not every app come with an option to alter time and date?

                        I'm not aware of any apps that provide this option. Can you give an example?

                        Just need to know how to alter the app clock to this new time as right now the app clock is reading currenttime()

                        When your user sets a custom time, calculate the difference between the custom time and the system clock (QTime::currentTime()). Record this difference (also known as the offset).

                        Then, whenever you need to calculate or display the time, add the offset to the system time: QTime::currentTime().addSecs(offset).

                        The coded version of what I suggested in my first answer ^^

                        N Offline
                        N Offline
                        nanamo
                        wrote on last edited by
                        #13

                        @SGaist Yes, thanks to all.
                        I will try now and see how it goes

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                        • SGaistS SGaist

                          @JKSH said in Custom Time:

                          @nanamo said in Custom Time:

                          Does not every app come with an option to alter time and date?

                          I'm not aware of any apps that provide this option. Can you give an example?

                          Just need to know how to alter the app clock to this new time as right now the app clock is reading currenttime()

                          When your user sets a custom time, calculate the difference between the custom time and the system clock (QTime::currentTime()). Record this difference (also known as the offset).

                          Then, whenever you need to calculate or display the time, add the offset to the system time: QTime::currentTime().addSecs(offset).

                          The coded version of what I suggested in my first answer ^^

                          JKSHJ Offline
                          JKSHJ Offline
                          JKSH
                          Moderators
                          wrote on last edited by
                          #14

                          @SGaist said in Custom Time:

                          The coded version of what I suggested in my first answer ^^

                          Ack, I didn't read the thread carefully; sorry!

                          Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                          SGaistS 1 Reply Last reply
                          0
                          • JKSHJ JKSH

                            @SGaist said in Custom Time:

                            The coded version of what I suggested in my first answer ^^

                            Ack, I didn't read the thread carefully; sorry!

                            SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #15

                            @JKSH said in Custom Time:

                            @SGaist said in Custom Time:

                            The coded version of what I suggested in my first answer ^^

                            Ack, I didn't read the thread carefully; sorry!

                            No worries ! I just found it funny :-D

                            You made my point clearer so @nanamo has understood it better so it's all good :-)

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

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