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  4. QStackwidget Multiple pages Issue[SOLVED]
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QStackwidget Multiple pages Issue[SOLVED]

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  • mrjjM mrjj

    @marlenet15
    Ok, that was odd as a stacked widget on UI and
    button where you call void setCurrentIndex(int index)

    should work just fine.

    But the important part.
    Did it crash when adding more that 7 pages that way?

    M Offline
    M Offline
    marlenet15
    wrote on last edited by
    #7

    @mrjj yes it does.

    mrjjM 1 Reply Last reply
    0
    • M marlenet15

      @mrjj yes it does.

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #8

      @marlenet15
      Ok !?!
      it crashes if you - in a blank new project,
      just right click and add more than 7 pages?

      M 1 Reply Last reply
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      • mrjjM mrjj

        @marlenet15
        Ok !?!
        it crashes if you - in a blank new project,
        just right click and add more than 7 pages?

        M Offline
        M Offline
        marlenet15
        wrote on last edited by
        #9

        @mrjj Oh no. I meant it crashes if I used void setCurrentIndex(int index) instead of setCurrentWidget(_page7);
        It wouldn't crash but it wouldn't allow me to go to the next page since clicking the button wouldn't do anything.

        mrjjM 1 Reply Last reply
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        • M marlenet15

          @mrjj Oh no. I meant it crashes if I used void setCurrentIndex(int index) instead of setCurrentWidget(_page7);
          It wouldn't crash but it wouldn't allow me to go to the next page since clicking the button wouldn't do anything.

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #10

          @marlenet15
          ok.so you had a bug. i guess.
          try this sample
          https://www.dropbox.com/s/xuhzip7p52g4guk/sevenstacked.zip?dl=0
          it can go back and forth.

          M 1 Reply Last reply
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          • mrjjM mrjj

            @marlenet15
            ok.so you had a bug. i guess.
            try this sample
            https://www.dropbox.com/s/xuhzip7p52g4guk/sevenstacked.zip?dl=0
            it can go back and forth.

            M Offline
            M Offline
            marlenet15
            wrote on last edited by marlenet15
            #11

            @mrjj I tried running it but nothing happens. The option to build is grayed out.
            and also all the pages that I am adding onto the stackwidget are classes I created so I am not sure it that also created an issue when I tried doing it through .ui

            mrjjM 1 Reply Last reply
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            • M marlenet15

              @mrjj I tried running it but nothing happens. The option to build is grayed out.
              and also all the pages that I am adding onto the stackwidget are classes I created so I am not sure it that also created an issue when I tried doing it through .ui

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by mrjj
              #12

              @marlenet15

              oh, go to Projects (left side icons) and adjust build path to
              somewhere that exists or set it if none.

              Well the stacked controls QWidgets so its ok its your own I think.

              M 1 Reply Last reply
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              • mrjjM mrjj

                @marlenet15

                oh, go to Projects (left side icons) and adjust build path to
                somewhere that exists or set it if none.

                Well the stacked controls QWidgets so its ok its your own I think.

                M Offline
                M Offline
                marlenet15
                wrote on last edited by
                #13

                @mrjj It tells me that 'File 'sevenstacked.pro' has modification time 2.9e+0.4 s in the future' and it just hangs

                mrjjM 1 Reply Last reply
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                • M marlenet15

                  @mrjj It tells me that 'File 'sevenstacked.pro' has modification time 2.9e+0.4 s in the future' and it just hangs

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

                  @marlenet15
                  OK?
                  Pretty strange.

                  just delete it and make a new .pro file and put this in it
                  just a default one.

                  #-------------------------------------------------
                  #
                  # Project created by QtCreator 2015-10-18T21:53:24
                  #
                  #-------------------------------------------------
                  
                  QT       += core gui
                  
                  greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                  
                  TARGET = sevenstacked
                  TEMPLATE = app
                  
                  
                  SOURCES += main.cpp\
                          mainwindow.cpp
                  
                  HEADERS  += mainwindow.h
                  
                  FORMS    += mainwindow.ui
                  
                  M 1 Reply Last reply
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                  • mrjjM mrjj

                    @marlenet15
                    OK?
                    Pretty strange.

                    just delete it and make a new .pro file and put this in it
                    just a default one.

                    #-------------------------------------------------
                    #
                    # Project created by QtCreator 2015-10-18T21:53:24
                    #
                    #-------------------------------------------------
                    
                    QT       += core gui
                    
                    greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                    
                    TARGET = sevenstacked
                    TEMPLATE = app
                    
                    
                    SOURCES += main.cpp\
                            mainwindow.cpp
                    
                    HEADERS  += mainwindow.h
                    
                    FORMS    += mainwindow.ui
                    
                    M Offline
                    M Offline
                    marlenet15
                    wrote on last edited by
                    #15

                    @mrjj haha it gave me like 27 errors

                    mrjjM 1 Reply Last reply
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                    • M marlenet15

                      @mrjj haha it gave me like 27 errors

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #16

                      @marlenet15
                      Ehh. ok.
                      Not sure what is going on.

                      Make new default project and then copy mainwindow.cpp/h and mainwindow.ui
                      to it ?

                      Anyway, was just a stacked widget with 10 pages and 2 buttons to go forth and back between the pages.

                      void MainWindow::on_pushButton_11_released() {
                      
                        int cur = ui->stackedWidget->currentIndex() + 1;
                        ui->stackedWidget->setCurrentIndex(cur);
                        ui->label->setText( QString::number(cur) );
                      
                      }
                      
                      void MainWindow::on_pushButton_12_released() {
                        int cur = ui->stackedWidget->currentIndex() - 1;
                        ui->stackedWidget->setCurrentIndex(cur);
                        ui->label->setText( QString::number(cur) );
                      
                      }
                      
                      M 1 Reply Last reply
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                      • mrjjM mrjj

                        @marlenet15
                        Ehh. ok.
                        Not sure what is going on.

                        Make new default project and then copy mainwindow.cpp/h and mainwindow.ui
                        to it ?

                        Anyway, was just a stacked widget with 10 pages and 2 buttons to go forth and back between the pages.

                        void MainWindow::on_pushButton_11_released() {
                        
                          int cur = ui->stackedWidget->currentIndex() + 1;
                          ui->stackedWidget->setCurrentIndex(cur);
                          ui->label->setText( QString::number(cur) );
                        
                        }
                        
                        void MainWindow::on_pushButton_12_released() {
                          int cur = ui->stackedWidget->currentIndex() - 1;
                          ui->stackedWidget->setCurrentIndex(cur);
                          ui->label->setText( QString::number(cur) );
                        
                        }
                        
                        M Offline
                        M Offline
                        marlenet15
                        wrote on last edited by
                        #17

                        @mrjj Ok so yes it does work that way. Do you have any idea why wouldn't work through the code I wrote?

                        mrjjM 1 Reply Last reply
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                        • M marlenet15

                          @mrjj Ok so yes it does work that way. Do you have any idea why wouldn't work through the code I wrote?

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by mrjj
                          #18

                          @marlenet15
                          :) super
                          Well, I cant see how you create _page1 - _page7
                          you must have XX * _page1 = new XX; somewhere.
                          and it might crash if you use setCurrentWidget for deallocated
                          object or something like that.

                          Also using setCurrentWidget, that widget must already be inserted into stacked.

                          Most of the time I just insert pages in UI as it is far easier.
                          You can even add dynamic also, if needed.

                          M 1 Reply Last reply
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                          • mrjjM mrjj

                            @marlenet15
                            :) super
                            Well, I cant see how you create _page1 - _page7
                            you must have XX * _page1 = new XX; somewhere.
                            and it might crash if you use setCurrentWidget for deallocated
                            object or something like that.

                            Also using setCurrentWidget, that widget must already be inserted into stacked.

                            Most of the time I just insert pages in UI as it is far easier.
                            You can even add dynamic also, if needed.

                            M Offline
                            M Offline
                            marlenet15
                            wrote on last edited by
                            #19

                            @mrjj wouldn't it be page7 that could be deallocated? I have been looking at my code like 50 times and I still can't find the error. I set the pages on the UI and page7 still doesn't work :(

                            M 1 Reply Last reply
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                            • M marlenet15

                              @mrjj wouldn't it be page7 that could be deallocated? I have been looking at my code like 50 times and I still can't find the error. I set the pages on the UI and page7 still doesn't work :(

                              M Offline
                              M Offline
                              marlenet15
                              wrote on last edited by
                              #20

                              @marlenet15 Ok So I commented out 90% of the code and page7 works! So now I have to uncomment section by section to figure out what is making page 7 crash.

                              mrjjM 1 Reply Last reply
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                              • M marlenet15

                                @marlenet15 Ok So I commented out 90% of the code and page7 works! So now I have to uncomment section by section to figure out what is making page 7 crash.

                                mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by mrjj
                                #21

                                @marlenet15

                                well its hard to guess when I cant see all code.

                                Do you do

                                QWidget *page7 = new QWidget()
                                

                                when you create them ?
                                or now you insert them into the stacked in the UI ?

                                M 1 Reply Last reply
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                                • mrjjM mrjj

                                  @marlenet15

                                  well its hard to guess when I cant see all code.

                                  Do you do

                                  QWidget *page7 = new QWidget()
                                  

                                  when you create them ?
                                  or now you insert them into the stacked in the UI ?

                                  M Offline
                                  M Offline
                                  marlenet15
                                  wrote on last edited by
                                  #22

                                  @mrjj I inserted it now on the UI. I figured it out! I had another class where I had an array of QStrings which contains the titles for each page. I had an array of size 6 because I had only focused on the 6 pages I created. However, when I created the 7th page it would crash because the index 6 didn't exist since the array goes from 0-5. Thank you so much for your help!!!

                                  mrjjM 1 Reply Last reply
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                                  • M marlenet15

                                    @mrjj I inserted it now on the UI. I figured it out! I had another class where I had an array of QStrings which contains the titles for each page. I had an array of size 6 because I had only focused on the 6 pages I created. However, when I created the 7th page it would crash because the index 6 didn't exist since the array goes from 0-5. Thank you so much for your help!!!

                                    mrjjM Offline
                                    mrjjM Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #23

                                    @marlenet15
                                    oh good found :)
                                    Nasty one.

                                    1 Reply Last reply
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