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QCustomPlot clear Data

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  • H Offline
    H Offline
    HafsaElif
    wrote on last edited by
    #3

    yes ı wrote.

    1 Reply Last reply
    0
    • RatzzR Offline
      RatzzR Offline
      Ratzz
      wrote on last edited by
      #4

      Is it solved?

      --Alles ist gut.

      1 Reply Last reply
      0
      • H Offline
        H Offline
        HafsaElif
        wrote on last edited by
        #5

        no. all about deleting not cleaning

        kshegunovK mrjjM 2 Replies Last reply
        0
        • H HafsaElif

          no. all about deleting not cleaning

          kshegunovK Offline
          kshegunovK Offline
          kshegunov
          Moderators
          wrote on last edited by
          #6

          I think Ian explained rather clearly what you can or can not do. I don't see how we could add to that.

          Read and abide by the Qt Code of Conduct

          H 1 Reply Last reply
          3
          • H HafsaElif

            no. all about deleting not cleaning

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by
            #7

            @HafsaElif
            There is
            graph->data()->clear();
            Since the 2.0 beta version.

            Alternatively, you can simply give it an empty data list.
            Then its "Clear".

            1 Reply Last reply
            4
            • H Offline
              H Offline
              HafsaElif
              wrote on last edited by
              #8

              I wrote this code and problem solved. Thank you mrjj !!!

              ui->qcustom->graph(0)->data()->clear();
              ui->qcustom->graph(1)->data()->clear();
              ui->qcustom->graph(2)->data()->clear();
              ui->qcustom->replot();
              

              0_1486038990528_Screenshot from 2017-02-01 12:00:06.png 0_1486038992133_Screenshot from 2017-02-02 15:35:37.png

              1 Reply Last reply
              1
              • kshegunovK kshegunov

                I think Ian explained rather clearly what you can or can not do. I don't see how we could add to that.

                H Offline
                H Offline
                HafsaElif
                wrote on last edited by
                #9

                @kshegunov I dont want to set empty data . I was searching for fallowing code which is shared by mrjj.

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                0
                • I Offline
                  I Offline
                  indu
                  wrote on last edited by
                  #10

                  Hi,

                  I'm facing some issue with ui->qcustom->graph(0)->data()->clear();. It is not working for me.
                  Data container is not getting cleared, even if i call clear() and then replot().
                  Pls help.
                  Thank you.

                  1 Reply Last reply
                  0
                  • O Offline
                    O Offline
                    oaeide
                    wrote on last edited by
                    #11

                    I have the same problem as indu2. Calling clear() and replot(), nothing happens

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                    0
                    • M Offline
                      M Offline
                      Marcel92
                      wrote on last edited by mrjj
                      #12

                      Try ui->yourPlot->clearPlottables();

                      1 Reply Last reply
                      2
                      • D Offline
                        D Offline
                        david_808
                        wrote on last edited by
                        #13

                        clearPlottables() does not work because it deletes the object entirely.

                        mrjjM 1 Reply Last reply
                        0
                        • D david_808

                          clearPlottables() does not work because it deletes the object entirely.

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #14

                          @david_808

                          Hi
                          Maybe ask the author of customplot about how to do it correctly then?

                          1 Reply Last reply
                          1
                          • S Offline
                            S Offline
                            Scarab
                            wrote on last edited by
                            #15

                            Try:

                            for( int g=0; g<pq_plot->graphCount(); g++ )
                            {
                                pq_plot->graph(g)->data().data().clear();
                            }
                            pq_plot->replot();
                            

                            don't know why to use ->data().data() but it works for me.

                            1 Reply Last reply
                            1
                            • Joel BodenmannJ Offline
                              Joel BodenmannJ Offline
                              Joel Bodenmann
                              wrote on last edited by
                              #16

                              @Scarab said in QCustomPlot clear Data:

                              don't know why to use ->data().data() but it works for me.

                              The type returned by QCPGraph::data() is a shared pointer to the data container. Both the shared pointer as well as the object the shared pointer is pointing to have a clear() function:

                              • If you do pq_plot->graph(g)->data().clear() you are calling QSharedPointer::clear().
                              • If you do pq_plot->graph(g)->data()->clear() you're calling QCPGraphDataContainer::clear() - which is what you actually want.

                              Calling pq_plot->graph(g)->data().data().clear() (as per your example) effectively calls QCPGraphDataContainer::clear() because QSharedPointer::data() returns the raw pointer managed by the shared pointer.
                              Therefore, pq_plot->graph(g)->data().data().clear() and pq_plot->graph(g)->data()->clear() are equivalent.

                              I hope this helps to prevent confusion for people that come across this in the future.

                              Industrial process automation software: https://simulton.com
                              Embedded Graphics & GUI library: https://ugfx.io

                              JamshidJ Q 2 Replies Last reply
                              6
                              • Joel BodenmannJ Joel Bodenmann

                                @Scarab said in QCustomPlot clear Data:

                                don't know why to use ->data().data() but it works for me.

                                The type returned by QCPGraph::data() is a shared pointer to the data container. Both the shared pointer as well as the object the shared pointer is pointing to have a clear() function:

                                • If you do pq_plot->graph(g)->data().clear() you are calling QSharedPointer::clear().
                                • If you do pq_plot->graph(g)->data()->clear() you're calling QCPGraphDataContainer::clear() - which is what you actually want.

                                Calling pq_plot->graph(g)->data().data().clear() (as per your example) effectively calls QCPGraphDataContainer::clear() because QSharedPointer::data() returns the raw pointer managed by the shared pointer.
                                Therefore, pq_plot->graph(g)->data().data().clear() and pq_plot->graph(g)->data()->clear() are equivalent.

                                I hope this helps to prevent confusion for people that come across this in the future.

                                JamshidJ Offline
                                JamshidJ Offline
                                Jamshid
                                wrote on last edited by
                                #17

                                @Joel-Bodenmann It was so helpful for me, thanks.

                                1 Reply Last reply
                                0
                                • Joel BodenmannJ Joel Bodenmann

                                  @Scarab said in QCustomPlot clear Data:

                                  don't know why to use ->data().data() but it works for me.

                                  The type returned by QCPGraph::data() is a shared pointer to the data container. Both the shared pointer as well as the object the shared pointer is pointing to have a clear() function:

                                  • If you do pq_plot->graph(g)->data().clear() you are calling QSharedPointer::clear().
                                  • If you do pq_plot->graph(g)->data()->clear() you're calling QCPGraphDataContainer::clear() - which is what you actually want.

                                  Calling pq_plot->graph(g)->data().data().clear() (as per your example) effectively calls QCPGraphDataContainer::clear() because QSharedPointer::data() returns the raw pointer managed by the shared pointer.
                                  Therefore, pq_plot->graph(g)->data().data().clear() and pq_plot->graph(g)->data()->clear() are equivalent.

                                  I hope this helps to prevent confusion for people that come across this in the future.

                                  Q Offline
                                  Q Offline
                                  QtTester
                                  wrote on last edited by
                                  #18

                                  @Joel-Bodenmann said in QCustomPlot clear Data:

                                  iner::clear()
                                  I have tested for one hour, the memory grow from 8192k to 9600k,when i call clear(),the memory is still 9600k, seems not release.

                                  1 Reply Last reply
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