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QStackwidget Multiple pages Issue[SOLVED]

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  • mrjjM Offline
    mrjjM Offline
    mrjj
    Lifetime Qt Champion
    wrote on last edited by
    #4

    Hi
    For test.
    If you do it in Designer in a new fresh project.
    Just Add QStackedWidget to Mainwindow.ui
    and right click it to add pages.
    Does it crash when more than 7 there also?

    M 1 Reply Last reply
    0
    • mrjjM mrjj

      Hi
      For test.
      If you do it in Designer in a new fresh project.
      Just Add QStackedWidget to Mainwindow.ui
      and right click it to add pages.
      Does it crash when more than 7 there also?

      M Offline
      M Offline
      marlenet15
      wrote on last edited by
      #5

      @mrjj That was my first option when I was creating the stackwidget. However, I wanted to go from one page to another and when I clicked the button nothing would happen but when I wrote it in code it worked fine.

      mrjjM 1 Reply Last reply
      0
      • M marlenet15

        @mrjj That was my first option when I was creating the stackwidget. However, I wanted to go from one page to another and when I clicked the button nothing would happen but when I wrote it in code it worked fine.

        mrjjM Offline
        mrjjM Offline
        mrjj
        Lifetime Qt Champion
        wrote on last edited by mrjj
        #6

        @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 1 Reply Last reply
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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
                                        0
                                        • 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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