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implementing a dynamic display

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  • mzimmersM mzimmers

    Ahh...that sounds like a good idea. Might be overkill, but I'm willing to go with it.

    So, before the main display is drawn, I'll have a preliminary display with which the user makes a product selection?

    I've never worked with multiple windows before. Do I create a form analogous to that defined in my widget.ui file? And would this be in another .ui file?

    kshegunovK Offline
    kshegunovK Offline
    kshegunov
    Moderators
    wrote on last edited by
    #10

    Sorry to interject, but it's still not quite clear to me if you have a way to determine what kind of device you're connected to through either interface? Or are you supposed to chose that and then establish the connection?

    Btw, I'd've put both type of interfaces in one application. It's a matter of designing the class hierarchy but you could in principle put it all - communication interfaces and application types - together and with abstract classes adding implementations should be rather easy. At a later stage you could even load the actual implementations on demand via plugins.

    Read and abide by the Qt Code of Conduct

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    • mzimmersM Offline
      mzimmersM Offline
      mzimmers
      wrote on last edited by
      #11

      There may be multiple products (of varying types) on the network. The user needs to know which one, by product name, he wishes to access. When he chooses one, I can then determine what UI components to display.

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      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #12

        So indeed, a plugin based architecture might be best suited for that.

        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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        • tekojoT Offline
          tekojoT Offline
          tekojo
          wrote on last edited by
          #13

          Kind of an unrelated note.
          It sounds like the application is for specialist use only. Can you go and ask one of the end users what they really want to do and in what order they would like to do it?

          So the products broadcast or reply to a broadcast on the network, so they can be identified? This would make it much easier for the network case.

          From the architecture side, a plugin approach makes most sense, especially as you expect future additions and changes.

          mzimmersM 1 Reply Last reply
          1
          • tekojoT tekojo

            Kind of an unrelated note.
            It sounds like the application is for specialist use only. Can you go and ask one of the end users what they really want to do and in what order they would like to do it?

            So the products broadcast or reply to a broadcast on the network, so they can be identified? This would make it much easier for the network case.

            From the architecture side, a plugin approach makes most sense, especially as you expect future additions and changes.

            mzimmersM Offline
            mzimmersM Offline
            mzimmers
            wrote on last edited by
            #14

            @tekojo I wish I could poll the user community on this matter -- I always like hearing from end-users before implementing an app. Unfortunately that option isn't available to me at this time.

            Regarding using plugins: that might be overkill, given that there are only two levels of user access, and only a few levels of app functionality. I also need to be concerned with distribution, and I'm not really familiar with plugins, but a plugin exists in a separate file, right? So can I still do a static build to create a monolithic distribution entity?

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            • mzimmersM Offline
              mzimmersM Offline
              mzimmers
              wrote on last edited by
              #15

              I've decided to implement the additional fields using a QDialog object. I created a second form for this dialog, but then realized I don't know how to access this form programmatically. Can someone point me to some directions on this? I've done some looking but haven't found anything that tells me how to connect up a second form.

              Clarification: I know that I want the form to be enabled when a button push delivers a signal, but I don't know how to "point to" this form programatically. I hope this makes sense; I've been struggling to find the right words to explain what I'm looking for.

              Thanks...

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              • 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
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                • 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?

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                  • 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
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                    • 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.

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                      • 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

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                        • 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.

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                          • 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

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                            • 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

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                                • 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

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                                  • 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
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                                    • 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

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                                        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
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