Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. General talk
  3. Brainstorm
  4. implementing a dynamic display
Forum Updated to NodeBB v4.3 + New Features

implementing a dynamic display

Scheduled Pinned Locked Moved Solved Brainstorm
33 Posts 6 Posters 11.5k Views 4 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #16

    You usually subclass QDialog and give it the necessary API to access what you want. Depending on what you want to add, you can also simply hide what should not be used.

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

    mzimmersM 1 Reply Last reply
    1
    • SGaistS SGaist

      You usually subclass QDialog and give it the necessary API to access what you want. Depending on what you want to add, you can also simply hide what should not be used.

      mzimmersM Offline
      mzimmersM Offline
      mzimmers
      wrote on last edited by
      #17

      @SGaist so each form would then have its own subclass?

      1 Reply Last reply
      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #18

        Just to be sure we are talking about the same thing, what do you mean by form ?

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

        mzimmersM 1 Reply Last reply
        0
        • SGaistS SGaist

          Just to be sure we are talking about the same thing, what do you mean by form ?

          mzimmersM Offline
          mzimmersM Offline
          mzimmers
          wrote on last edited by
          #19

          @SGaist by "form" I mean an entry under "Forms" in the project file; ie, a file with a .ui extension that is generated by Designer.

          1 Reply Last reply
          0
          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #20

            Then that's the most common use case. You create as many "Forms" you need and give them the API you need.

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

            1 Reply Last reply
            1
            • mzimmersM Offline
              mzimmersM Offline
              mzimmers
              wrote on last edited by
              #21

              I see. So, when I created this project, I selected Qt Widgets Application, and Creator automatically set up the form and the class for me. Should I use that class as a model for my new form?

              I still don't quite understand how the program "knows" to use the .ui file. I don't see the connection anywhere in my code.

              1 Reply Last reply
              0
              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #22

                It's just a starting point. Nothing forbids you to have several forms.

                The .uil file is processed by uic to generate code (a bit like moc for QObject based classes) then the ui.setupUi(this); line does the "magic" to setup everything you prepared with Designer.

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

                1 Reply Last reply
                1
                • mzimmersM Offline
                  mzimmersM Offline
                  mzimmers
                  wrote on last edited by
                  #23

                  I've tried to implement a new class (patterned after my main form)...obviously I don't understand something.

                  Here's the header:

                  #ifndef CREDENTIALS_H
                  #define CREDENTIALS_H
                  
                  #include <QWidget>
                  
                  namespace Ui
                  {
                      class Credentials;
                  }
                  class Credentials : public QWidget
                  {
                      Q_OBJECT
                  public:
                      explicit Credentials(QWidget *parent = nullptr);
                  private:
                      Ui::Credentials *uiCredentials;
                  };
                  
                  #endif // CREDENTIALS_H
                  

                  and here's the source:

                  #include "credentials.h"
                  #include "ui_credentials.h"
                  
                  Credentials::Credentials(QWidget *parent)
                      : QWidget(parent),
                        uiCredentials(new Ui::Credentials)
                  
                  {
                      uiCredentials->setupUi(this);
                  }
                  

                  I'm getting an error "invalid use of incomplete type 'class Ui::Credentials'. Why is it incomplete?

                  kshegunovK 1 Reply Last reply
                  0
                  • mzimmersM mzimmers

                    I've tried to implement a new class (patterned after my main form)...obviously I don't understand something.

                    Here's the header:

                    #ifndef CREDENTIALS_H
                    #define CREDENTIALS_H
                    
                    #include <QWidget>
                    
                    namespace Ui
                    {
                        class Credentials;
                    }
                    class Credentials : public QWidget
                    {
                        Q_OBJECT
                    public:
                        explicit Credentials(QWidget *parent = nullptr);
                    private:
                        Ui::Credentials *uiCredentials;
                    };
                    
                    #endif // CREDENTIALS_H
                    

                    and here's the source:

                    #include "credentials.h"
                    #include "ui_credentials.h"
                    
                    Credentials::Credentials(QWidget *parent)
                        : QWidget(parent),
                          uiCredentials(new Ui::Credentials)
                    
                    {
                        uiCredentials->setupUi(this);
                    }
                    

                    I'm getting an error "invalid use of incomplete type 'class Ui::Credentials'. Why is it incomplete?

                    kshegunovK Offline
                    kshegunovK Offline
                    kshegunov
                    Moderators
                    wrote on last edited by kshegunov
                    #24
                    #include "ui_credentials_form_file_name.h"
                    

                    Read and abide by the Qt Code of Conduct

                    1 Reply Last reply
                    2
                    • mzimmersM Offline
                      mzimmersM Offline
                      mzimmers
                      wrote on last edited by
                      #25

                      I think I'm already doing that -- in the source file:

                      #include "credentials.h"
                       ***** #include "ui_credentials.h" *****
                      Credentials::Credentials(QWidget *parent)
                      

                      0_1510758968869_credential.PNG

                      1 Reply Last reply
                      0
                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #26

                        Did you re-run qmake after adding your new form ?

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

                        mzimmersM 1 Reply Last reply
                        0
                        • SGaistS SGaist

                          Did you re-run qmake after adding your new form ?

                          mzimmersM Offline
                          mzimmersM Offline
                          mzimmers
                          wrote on last edited by
                          #27

                          @SGaist Yes. (I just tried it again to be sure.) I even did a clean/qmake/build...same results.

                          kshegunovK 1 Reply Last reply
                          0
                          • mzimmersM mzimmers

                            @SGaist Yes. (I just tried it again to be sure.) I even did a clean/qmake/build...same results.

                            kshegunovK Offline
                            kshegunovK Offline
                            kshegunov
                            Moderators
                            wrote on last edited by
                            #28

                            And is the root object of your form called "Credentials" (look for it when you open the form in the designer - in the right, in the object tree the first object's name)?

                            Read and abide by the Qt Code of Conduct

                            1 Reply Last reply
                            3
                            • mzimmersM Offline
                              mzimmersM Offline
                              mzimmers
                              wrote on last edited by
                              #29

                              Aha! That did the trick. Thanks, kshegunov. It was simply called "Dialog."

                              So, the step I missed was matching the name of the top-level object created in Designer with the new class I created manually to support it. I looked past this because the first form (and its supporting class) was created automatically when I started the project.

                              Thanks again.

                              mrjjM 1 Reply Last reply
                              2
                              • mzimmersM mzimmers

                                Aha! That did the trick. Thanks, kshegunov. It was simply called "Dialog."

                                So, the step I missed was matching the name of the top-level object created in Designer with the new class I created manually to support it. I looked past this because the first form (and its supporting class) was created automatically when I started the project.

                                Thanks again.

                                mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by mrjj
                                #30

                                @mzimmers
                                Hi
                                Just as a note. you can add as many forms as you like and
                                have them auto created like mainwindow is.

                                It sounds you manually created Credentials ?

                                To get a new form, simply right click top of project, select "Add new" and then
                                alt text
                                In next window, you can choose if it should be MainWindow, Dialog or Widget.

                                This way you get .ui, cpp and h all ready to go.

                                maybe i misunderstood but just in case :)

                                mzimmersM 1 Reply Last reply
                                2
                                • mrjjM mrjj

                                  @mzimmers
                                  Hi
                                  Just as a note. you can add as many forms as you like and
                                  have them auto created like mainwindow is.

                                  It sounds you manually created Credentials ?

                                  To get a new form, simply right click top of project, select "Add new" and then
                                  alt text
                                  In next window, you can choose if it should be MainWindow, Dialog or Widget.

                                  This way you get .ui, cpp and h all ready to go.

                                  maybe i misunderstood but just in case :)

                                  mzimmersM Offline
                                  mzimmersM Offline
                                  mzimmers
                                  wrote on last edited by
                                  #31

                                  @mrjj oh, that's good to know about. I looked right past that and just created the form from the line below. Thanks, mrjj...I'll remember that for the (not so distant) future.

                                  mrjjM 1 Reply Last reply
                                  0
                                  • mzimmersM mzimmers

                                    @mrjj oh, that's good to know about. I looked right past that and just created the form from the line below. Thanks, mrjj...I'll remember that for the (not so distant) future.

                                    mrjjM Offline
                                    mrjjM Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #32

                                    @mzimmers
                                    Ah, yep that gives you just the ui file which is useful for hooking somes some interface up
                                    with existing code. But not so much for a brand new window/dialog. :)

                                    1 Reply Last reply
                                    1
                                    • MRenM Offline
                                      MRenM Offline
                                      MRen
                                      wrote on last edited by
                                      #33

                                      Just as a note. you can add as many forms as you like and
                                      have them auto created like mainwindow is.

                                      P.s.:Hi

                                      1 Reply Last reply
                                      0

                                      • Login

                                      • Login or register to search.
                                      • First post
                                        Last post
                                      0
                                      • Categories
                                      • Recent
                                      • Tags
                                      • Popular
                                      • Users
                                      • Groups
                                      • Search
                                      • Get Qt Extensions
                                      • Unsolved