Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. how the functions of QanalogClockPlugin has been called in qwidgetplugins.

how the functions of QanalogClockPlugin has been called in qwidgetplugins.

Scheduled Pinned Locked Moved Solved General and Desktop
19 Posts 4 Posters 2.2k Views
  • 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.
  • mrjjM mrjj

    @hjohn
    Hi
    For a Designer plugin. The Designer app load the plugin and calls the methods to
    get name of the plugin/widgets and other metadata to show in its Widget list so
    they can be using while designing. So those functions are being called when the plugin is being loaded by Designer. ( or the loader part)

    QDesigner is a normal application. Nothing special there.
    However, it expects its plugins to have a certain interface/list
    of functions to return the data it wants.
    The most important being:
    QString includeFile() const override; / what include file to use in the UI code gen.
    QString name() const override; // what name to list it under in Widget List
    QWidget *createWidget(QWidget *parent) override; // ask it to supply a instance to put on form

    For your own application, a plugin could have any interface as you then decide the
    rules for being a plugin to your application.

    H Offline
    H Offline
    hjohn
    wrote on last edited by
    #5

    @mrjj it meaans by using functions like name() and CreatWidget() ,plugin connect with that particular widget.
    if so,then if i want to add another widget then i have to just add new values in these two functions.

    QString widgetPlugins::domXml() const{}
    

    Is this function important to implement.?

    mrjjM 1 Reply Last reply
    0
    • H hjohn

      @mrjj it meaans by using functions like name() and CreatWidget() ,plugin connect with that particular widget.
      if so,then if i want to add another widget then i have to just add new values in these two functions.

      QString widgetPlugins::domXml() const{}
      

      Is this function important to implement.?

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

      @hjohn

      Hi
      All the functions showed must be implemented.
      Its not optional. All must be implemented.

      Its possible to have same plugin offer more than one widget.

      So if u have multiple widgets, there is a better way than
      creating multiple plugins for each widget.
      But you should wait with that unless one plugin is ok to handle :)

      H 1 Reply Last reply
      1
      • mrjjM mrjj

        @hjohn

        Hi
        All the functions showed must be implemented.
        Its not optional. All must be implemented.

        Its possible to have same plugin offer more than one widget.

        So if u have multiple widgets, there is a better way than
        creating multiple plugins for each widget.
        But you should wait with that unless one plugin is ok to handle :)

        H Offline
        H Offline
        hjohn
        wrote on last edited by
        #7

        @mrjj yeah thanks..one last question:
        As i know if we work with Widget if have to call

        Widget w;
        w.show();
        

        in main.cpp.
        But here in this example from qtdocument
        http://doc.qt.io/qt-5/qtdesigner-customwidgetplugin-example.html

        they are not including main.cpp file. Is this possible to run and display widget without main.cpp file

        mrjjM 1 Reply Last reply
        0
        • H hjohn

          @mrjj yeah thanks..one last question:
          As i know if we work with Widget if have to call

          Widget w;
          w.show();
          

          in main.cpp.
          But here in this example from qtdocument
          http://doc.qt.io/qt-5/qtdesigner-customwidgetplugin-example.html

          they are not including main.cpp file. Is this possible to run and display widget without main.cpp file

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

          @hjohn
          Hi
          You can show a widget from anywhere.
          But to prevent out of scope issues, you should new it

          Widget* w = new Widget(this);
          w->show();

          But normally, a plugin for Designer DO NOT open other widgets.

          H 1 Reply Last reply
          0
          • mrjjM mrjj

            @hjohn
            Hi
            You can show a widget from anywhere.
            But to prevent out of scope issues, you should new it

            Widget* w = new Widget(this);
            w->show();

            But normally, a plugin for Designer DO NOT open other widgets.

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

            @mrjj said in how the functions of QanalogClockPlugin has been called in qwidgetplugins.:

            But normally, a plugin for Designer DO NOT open other widgets.

            In example there is only one widget.which is analogclock and that i want to open. In example there is no any w.show();command

            jsulmJ 1 Reply Last reply
            0
            • H hjohn

              @mrjj said in how the functions of QanalogClockPlugin has been called in qwidgetplugins.:

              But normally, a plugin for Designer DO NOT open other widgets.

              In example there is only one widget.which is analogclock and that i want to open. In example there is no any w.show();command

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #10

              @hjohn The application is showing the widget, the plug-in simply creates and returns an instance of it.

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              1 Reply Last reply
              0
              • H Offline
                H Offline
                hjohn
                wrote on last edited by hjohn
                #11

                When run Example of http://doc.qt.io/qt-5/qtdesigner-customwidgetplugin-example.html
                it generate
                0_1529575055613_6b412866-740a-4bee-967c-13bf8d077d73-image.png

                It means that This project is not created in the normal 'Qt-executable' kind format.Maybe because there is no main.cpp file.
                what should i add or how to create project so that is get output as a analogClock .

                jsulmJ 1 Reply Last reply
                0
                • H hjohn

                  When run Example of http://doc.qt.io/qt-5/qtdesigner-customwidgetplugin-example.html
                  it generate
                  0_1529575055613_6b412866-740a-4bee-967c-13bf8d077d73-image.png

                  It means that This project is not created in the normal 'Qt-executable' kind format.Maybe because there is no main.cpp file.
                  what should i add or how to create project so that is get output as a analogClock .

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #12

                  @hjohn The main.cpp is part of QtDesigner.
                  So, it is a normal Qt application which loads plug-ins.
                  Again: a plug-in does NOT have a main.cpp, because it is a plug-in which is loaded by an application.
                  A plug-in is a library and a library does not have main.cpp.

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  H 1 Reply Last reply
                  1
                  • mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #13

                    Hi

                    To see the clock there is 2 options.

                    1:
                    Compile it as plugin and COPY the DLL to the Designer plugin folder in your Qt installation folder
                    ( or do make install )
                    Start Creator and then make project as normally with ui and
                    drag the analog clock to the new form.

                    2:
                    Dont use as plugin at all.
                    use the files analogclock.cpp/.h directly in a project
                    and simply NEW a analog clock and show it.

                    If you just started with Qt/programming. Designer plugins are maybe a bit
                    hard topic to start with :)

                    H 2 Replies Last reply
                    3
                    • jsulmJ jsulm

                      @hjohn The main.cpp is part of QtDesigner.
                      So, it is a normal Qt application which loads plug-ins.
                      Again: a plug-in does NOT have a main.cpp, because it is a plug-in which is loaded by an application.
                      A plug-in is a library and a library does not have main.cpp.

                      H Offline
                      H Offline
                      hjohn
                      wrote on last edited by
                      #14

                      @jsulm so how am I supposed to load this plugin?
                      http://doc.qt.io/qt-5/qtdesigner-customwidgetplugin-example.html

                      jsulmJ 1 Reply Last reply
                      1
                      • H hjohn

                        @jsulm so how am I supposed to load this plugin?
                        http://doc.qt.io/qt-5/qtdesigner-customwidgetplugin-example.html

                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #15

                        @hjohn Please check what @mrjj said.
                        There is one important thing: if you want to use this plug-in in QtDesigner you have to use exactly same Qt version and same compiler as were used to build QtDesigner!

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                        1 Reply Last reply
                        0
                        • mrjjM mrjj

                          Hi

                          To see the clock there is 2 options.

                          1:
                          Compile it as plugin and COPY the DLL to the Designer plugin folder in your Qt installation folder
                          ( or do make install )
                          Start Creator and then make project as normally with ui and
                          drag the analog clock to the new form.

                          2:
                          Dont use as plugin at all.
                          use the files analogclock.cpp/.h directly in a project
                          and simply NEW a analog clock and show it.

                          If you just started with Qt/programming. Designer plugins are maybe a bit
                          hard topic to start with :)

                          H Offline
                          H Offline
                          hjohn
                          wrote on last edited by
                          #16
                          This post is deleted!
                          1 Reply Last reply
                          0
                          • mrjjM mrjj

                            Hi

                            To see the clock there is 2 options.

                            1:
                            Compile it as plugin and COPY the DLL to the Designer plugin folder in your Qt installation folder
                            ( or do make install )
                            Start Creator and then make project as normally with ui and
                            drag the analog clock to the new form.

                            2:
                            Dont use as plugin at all.
                            use the files analogclock.cpp/.h directly in a project
                            and simply NEW a analog clock and show it.

                            If you just started with Qt/programming. Designer plugins are maybe a bit
                            hard topic to start with :)

                            H Offline
                            H Offline
                            hjohn
                            wrote on last edited by hjohn
                            #17

                            @mrjj said in how the functions of QanalogClockPlugin has been called in qwidgetplugins.:

                            Start Creator and then make project as normally with ui and
                            drag the analog clock to the new form.

                            hey thanks.Can u elaborate this , It would be great help.

                            mrjjM 1 Reply Last reply
                            0
                            • H hjohn

                              @mrjj said in how the functions of QanalogClockPlugin has been called in qwidgetplugins.:

                              Start Creator and then make project as normally with ui and
                              drag the analog clock to the new form.

                              hey thanks.Can u elaborate this , It would be great help.

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

                              @hjohn
                              Well if on windows.
                              Check what your creator was compiled with.
                              You need to use same compiler and ca. same Qt version.
                              alt text
                              Install visual studio 2015 or 2017 with 32 bit !
                              This is a download from Microsoft site. Not Qt. ( not allowed)
                              ( you cannot use mingw)
                              Install the Qt for visual studio.
                              (mingw version cannot be used)
                              alt text

                              THE ABOVE IS MUST DO! else it wont work.

                              Then compile the plugin in RELEASE mode and 32 Bit. ( not 64)
                              Go to its build folder and copy the DLL to
                              alt text
                              C:\Qt\Tools\QtCreator\bin\plugins\designer
                              alt text

                              Start Creator and go to design mode
                              It will be in list to the left.
                              Scroll down to find it.

                              Note: this is considered intermediate level. :)

                              H 1 Reply Last reply
                              3
                              • mrjjM mrjj

                                @hjohn
                                Well if on windows.
                                Check what your creator was compiled with.
                                You need to use same compiler and ca. same Qt version.
                                alt text
                                Install visual studio 2015 or 2017 with 32 bit !
                                This is a download from Microsoft site. Not Qt. ( not allowed)
                                ( you cannot use mingw)
                                Install the Qt for visual studio.
                                (mingw version cannot be used)
                                alt text

                                THE ABOVE IS MUST DO! else it wont work.

                                Then compile the plugin in RELEASE mode and 32 Bit. ( not 64)
                                Go to its build folder and copy the DLL to
                                alt text
                                C:\Qt\Tools\QtCreator\bin\plugins\designer
                                alt text

                                Start Creator and go to design mode
                                It will be in list to the left.
                                Scroll down to find it.

                                Note: this is considered intermediate level. :)

                                H Offline
                                H Offline
                                hjohn
                                wrote on last edited by
                                #19

                                Thank you very much @mrjj
                                Now I got the clear idea what was the mistake I was making. And thanks a lot for the efforts you did, it was a huge help.Thank you.

                                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