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Led Like buttons/Widgets

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  • B Bruschetta

    @mrjj
    This is a very interesting plugin , i would like to use it.
    I can build the project i downloaded from your dropbox but i still do not find the plugin into my designer.

    I'm under windows , are there any particular passages i have to do to make it work?
    Thank a lot for your time.

    My QT version is 5.7

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

    @Bruschetta
    Hi.
    Plugins are Dlls. Creator are compiled with Visual Studio. (2013)
    So to load custom plugin, it must be compiled with visual studio and not mingw.
    Then the dll should be copied to "\bin\plugins\designer"

    Alternative you can use the Qleds by Promotion
    http://doc.qt.io/qt-5/designer-using-custom-widgets.html

    Alternative, you can have my VS DLL
    https://www.dropbox.com/s/1f65fzcew6pjm2z/VSqledplugin.zip?dl=0
    Copy to C:\Qt\Tools\QtCreator\bin\plugins\designer
    Disclaimer: Normally I do not recommend downloading DLLS from forums.

    B 1 Reply Last reply
    2
    • mrjjM mrjj

      @Bruschetta
      Hi.
      Plugins are Dlls. Creator are compiled with Visual Studio. (2013)
      So to load custom plugin, it must be compiled with visual studio and not mingw.
      Then the dll should be copied to "\bin\plugins\designer"

      Alternative you can use the Qleds by Promotion
      http://doc.qt.io/qt-5/designer-using-custom-widgets.html

      Alternative, you can have my VS DLL
      https://www.dropbox.com/s/1f65fzcew6pjm2z/VSqledplugin.zip?dl=0
      Copy to C:\Qt\Tools\QtCreator\bin\plugins\designer
      Disclaimer: Normally I do not recommend downloading DLLS from forums.

      B Offline
      B Offline
      Bruschetta
      wrote on last edited by
      #13

      @mrjj
      Your answer is very exaustive, thanks for the heads up!

      mrjjM 1 Reply Last reply
      2
      • B Bruschetta

        @mrjj
        Your answer is very exaustive, thanks for the heads up!

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

        @Bruschetta
        Np.
        I think its needs a .pri file to be complete
        http://doc.qt.io/qt-5/designer-creating-custom-widgets.html
        section "Splitting up the Plugin"
        To make it easy to use in a clean project.
        Then all you need to do is
        include(QLeds.pri)
        to use in a project. Didn't try that yet.

        B 1 Reply Last reply
        2
        • mrjjM mrjj

          @Bruschetta
          Np.
          I think its needs a .pri file to be complete
          http://doc.qt.io/qt-5/designer-creating-custom-widgets.html
          section "Splitting up the Plugin"
          To make it easy to use in a clean project.
          Then all you need to do is
          include(QLeds.pri)
          to use in a project. Didn't try that yet.

          B Offline
          B Offline
          Bruschetta
          wrote on last edited by Bruschetta
          #15

          @mrjj
          with the dll now i see the widget in the Designer.
          Anyway if i use it in i have serveral errors.

          In particular i tried to create the PRI file containing:

          INCLUDEPATH += $$PWD
          HEADERS += $$PWD/qled.h
          SOURCES += $$PWD/qled.cpp
          
          
          

          That i added to the plugin and the project file

          Whan i try to compile now i get this error

          mingw32-make[1]: *** No rule to make target '../../QTProjects-New/Alpha2/qled.cpp', needed by 'debug/qled.o'. Stop.:

          What i'm doing wrong with this pri files?
          Is again mingw fault?

          mrjjM 1 Reply Last reply
          0
          • B Bruschetta

            @mrjj
            with the dll now i see the widget in the Designer.
            Anyway if i use it in i have serveral errors.

            In particular i tried to create the PRI file containing:

            INCLUDEPATH += $$PWD
            HEADERS += $$PWD/qled.h
            SOURCES += $$PWD/qled.cpp
            
            
            

            That i added to the plugin and the project file

            Whan i try to compile now i get this error

            mingw32-make[1]: *** No rule to make target '../../QTProjects-New/Alpha2/qled.cpp', needed by 'debug/qled.o'. Stop.:

            What i'm doing wrong with this pri files?
            Is again mingw fault?

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

            @Bruschetta
            Hi.
            seems fine.
            I have not tried this yet.
            No, should not be mingw fault. :)

            maybe we be need
            QT += QLed

            Sounds like its not linking the plugin but I not sure if that will do it.

            I also really want to know how to do this the right way. as I think its very little needed to fully work but
            not sure what it is.

            B 1 Reply Last reply
            1
            • mrjjM mrjj

              @Bruschetta
              Hi.
              seems fine.
              I have not tried this yet.
              No, should not be mingw fault. :)

              maybe we be need
              QT += QLed

              Sounds like its not linking the plugin but I not sure if that will do it.

              I also really want to know how to do this the right way. as I think its very little needed to fully work but
              not sure what it is.

              B Offline
              B Offline
              Bruschetta
              wrote on last edited by Bruschetta
              #17

              @mrjj
              Unfortunately for me .pri files are not working, neither copying the qled.h and qled.cpp into the project.

              I got those warnings during compile time

              warning: 'virtual const QMetaObject* QLed::metaObject() const' redeclared without dllimport attribute: previous dllimport ignored
               warning: 'void QLed::setOffColor(QLed::ledColor)' redeclared without dllimport attribute: previous dllimport ignored
              .
              .
              

              and errors

              QTProjects\build-Alpha2-Desktop_Qt_5_7_0_MinGW_32bit-Debug/debug/moc_qled.cpp:151: undefined reference to `_imp___ZN4QLed10setOnColorENS_8ledColorE
              QTProjects\build-Alpha2-Desktop_Qt_5_7_0_MinGW_32bit-Debug/debug/moc_qled.cpp:153: undefined reference to `_imp___ZN4QLed8setShapeENS_8ledShapeE
              .
              .
              

              tried to add qledplugin.dll as lib in the .pro file too without success.

              Have you any suggestion ? :)
              Thanks again for the attention and time

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

                Yes. If you remove the QDESIGNER_WIDGET_EXPORT
                from the qled.h it will link and run
                as in

                class /*QDESIGNER_WIDGET_EXPORT*/ QLed : public QWidget {
                

                You also need the qres in PRI file
                qled.pri

                QT += svg
                INCLUDEPATH += $$PWD
                HEADERS += $$PWD/qled.h
                SOURCES += $$PWD/qled.cpp
                
                RESOURCES += $$PWD/qled.qrc
                

                Note that this is slightly hack-ish as you need QDESIGNER_WIDGET_EXPORT when compiling as plugin.
                But not when using it via .PRI file.

                B 1 Reply Last reply
                3
                • mrjjM mrjj

                  Yes. If you remove the QDESIGNER_WIDGET_EXPORT
                  from the qled.h it will link and run
                  as in

                  class /*QDESIGNER_WIDGET_EXPORT*/ QLed : public QWidget {
                  

                  You also need the qres in PRI file
                  qled.pri

                  QT += svg
                  INCLUDEPATH += $$PWD
                  HEADERS += $$PWD/qled.h
                  SOURCES += $$PWD/qled.cpp
                  
                  RESOURCES += $$PWD/qled.qrc
                  

                  Note that this is slightly hack-ish as you need QDESIGNER_WIDGET_EXPORT when compiling as plugin.
                  But not when using it via .PRI file.

                  B Offline
                  B Offline
                  Bruschetta
                  wrote on last edited by
                  #19

                  @mrjj
                  you have been fast as lightning! And it's working! Thahks a lot!

                  mrjjM 1 Reply Last reply
                  2
                  • B Bruschetta

                    @mrjj
                    you have been fast as lightning! And it's working! Thahks a lot!

                    mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #20

                    @Bruschetta
                    Super :)

                    1 Reply Last reply
                    1
                    • mrjjM mrjj

                      @SGaist
                      Funny enough I also found that ;)
                      Its Qt4-ish and needed to be updated to new plugin export macros and includes for designer
                      interface. the pro file also had old keywords and some more stuff needed.

                      Here is version that can compile on Windows Qt5.7.
                      https://www.dropbox.com/s/38endyfoexb28nd/QLeds57.zip?dl=0

                      B Offline
                      B Offline
                      BlackDogWhite
                      wrote on last edited by
                      #21

                      @mrjj You have been very helpful to @Bruschetta and I'm wondering if you will go a little further.

                      The Qleds57.zip file is no longer in your drop box. Would you mind terribly putting up a copy again? Or a 5.10 version?

                      I'm trying to walk through this as a beginner and keep running into roadblocks.

                      mrjjM 1 Reply Last reply
                      0
                      • B BlackDogWhite

                        @mrjj You have been very helpful to @Bruschetta and I'm wondering if you will go a little further.

                        The Qleds57.zip file is no longer in your drop box. Would you mind terribly putting up a copy again? Or a 5.10 version?

                        I'm trying to walk through this as a beginner and keep running into roadblocks.

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by mrjj
                        #22

                        @BlackDogWhite
                        Surely
                        Here is similar sample
                        https://www.dropbox.com/sh/mnaipp7apodqp0d/AABkpILwRICtBxd-5lK0CcUSa?dl=0

                        Make sure to open UseTheLeds.pro
                        in the UseTheLeds subfolder.
                        It show a led using .pri inclusion. That is it compiles the leds into the project.

                        There is also qledplugin.pro that compiles it as a plugin.
                        Note that to use it as a plugin, you need the visual studio compiler to make it loadable by
                        Creator. (mingw wont work)

                        Using .pri inclusion, you dont have a plugin, but can use promotion. ( as UseTheLeds.pro shows)

                        While a plugin, offers design time settings of properties, you can access the promoted led in code
                        using ui->ledname and hence get almost the same.

                        Let me know if you want to create a plugin. I didnt test if that part just works
                        but UseTheLeds surely runs on 5.10

                        B 1 Reply Last reply
                        1
                        • mrjjM mrjj

                          @BlackDogWhite
                          Surely
                          Here is similar sample
                          https://www.dropbox.com/sh/mnaipp7apodqp0d/AABkpILwRICtBxd-5lK0CcUSa?dl=0

                          Make sure to open UseTheLeds.pro
                          in the UseTheLeds subfolder.
                          It show a led using .pri inclusion. That is it compiles the leds into the project.

                          There is also qledplugin.pro that compiles it as a plugin.
                          Note that to use it as a plugin, you need the visual studio compiler to make it loadable by
                          Creator. (mingw wont work)

                          Using .pri inclusion, you dont have a plugin, but can use promotion. ( as UseTheLeds.pro shows)

                          While a plugin, offers design time settings of properties, you can access the promoted led in code
                          using ui->ledname and hence get almost the same.

                          Let me know if you want to create a plugin. I didnt test if that part just works
                          but UseTheLeds surely runs on 5.10

                          B Offline
                          B Offline
                          BlackDogWhite
                          wrote on last edited by
                          #23

                          @mrjj Thank you for sharing those files. I was able to open the UseTheLeds project, run it, modify it and all was cool.

                          But then I tried to add another instance of the qLed, both by promotion (drag a Containers->Widget onto the form; rtClk->Promote ) and by coping the already working qLed object. Neither of these worked. Adding to the MainWindow constructor

                          ui->qLed_2->setShape(QLed::Circle);  // the "copied" version of qLed
                          ui->MyQled->setShape(QLed::Circle); // the promoted container widget
                          
                          

                          would cause the compile to fail because neither qLed_2 nor MyQled were members of Ui::MainWindow.

                          Obviously I've skipped an important step. Probably something to do with ui_mainwindow.h. Am I supposed to edit that manually (I don't think so, but it's not getting updated automatically)?

                          Hints??

                          B 1 Reply Last reply
                          0
                          • B BlackDogWhite

                            @mrjj Thank you for sharing those files. I was able to open the UseTheLeds project, run it, modify it and all was cool.

                            But then I tried to add another instance of the qLed, both by promotion (drag a Containers->Widget onto the form; rtClk->Promote ) and by coping the already working qLed object. Neither of these worked. Adding to the MainWindow constructor

                            ui->qLed_2->setShape(QLed::Circle);  // the "copied" version of qLed
                            ui->MyQled->setShape(QLed::Circle); // the promoted container widget
                            
                            

                            would cause the compile to fail because neither qLed_2 nor MyQled were members of Ui::MainWindow.

                            Obviously I've skipped an important step. Probably something to do with ui_mainwindow.h. Am I supposed to edit that manually (I don't think so, but it's not getting updated automatically)?

                            Hints??

                            B Offline
                            B Offline
                            BlackDogWhite
                            wrote on last edited by
                            #24

                            @mrjj
                            ohhhh, I must not have something set up properly, maybe because this was just a demo. But when I add stuff to the ui, the ui_mainwindow.h file is created up and over in a build-UseTheLeds-Desktop_blah_blah-Debug directory. So that .h file has references to MyQled and qLed_2.

                            Must be something screwed up in my environment.

                            mrjjM 1 Reply Last reply
                            0
                            • B BlackDogWhite

                              @mrjj
                              ohhhh, I must not have something set up properly, maybe because this was just a demo. But when I add stuff to the ui, the ui_mainwindow.h file is created up and over in a build-UseTheLeds-Desktop_blah_blah-Debug directory. So that .h file has references to MyQled and qLed_2.

                              Must be something screwed up in my environment.

                              mrjjM Offline
                              mrjjM Offline
                              mrjj
                              Lifetime Qt Champion
                              wrote on last edited by
                              #25

                              @BlackDogWhite
                              hi, nope something up with usetheleds demo as copying
                              the promoted several time didnt show many lights.
                              Ill will report back when i have a look at it :)

                              B 1 Reply Last reply
                              0
                              • mrjjM mrjj

                                @BlackDogWhite
                                hi, nope something up with usetheleds demo as copying
                                the promoted several time didnt show many lights.
                                Ill will report back when i have a look at it :)

                                B Offline
                                B Offline
                                BlackDogWhite
                                wrote on last edited by
                                #26

                                @mrjj well, it may also be my environment, sadly. I'm trying to figure out Qt, both on the PC and on a Raspberry Pi 3, using MS Visual Studio (which I'm pretty familiar with), along with QT VS Tools and VisualGDB.

                                • I can get your demo (UseTheLeds) working under Qt Creator (except for the above referenced problem) and displaying on the PC

                                • I also have a working GUI program developed on the PC (with VS, Qt VS Tools, and VisualGDB) that runs both on the PC and squirts down to the Pi.

                                • But trying to add the Qled code to the working GUI program breaks everything, possibly in part because the cross compiler chain (c:\sysgcc\raspberry...) cannot find QtSvg includes. When I search for QtSvg, I find it but only in a qt4 dir chain (SysGCC\raspberry\arm-linux-gnueabihf\sysroot\usr\include\qt4...)

                                Ouch, I'm getting a headache!

                                mrjjM 1 Reply Last reply
                                0
                                • B BlackDogWhite

                                  @mrjj well, it may also be my environment, sadly. I'm trying to figure out Qt, both on the PC and on a Raspberry Pi 3, using MS Visual Studio (which I'm pretty familiar with), along with QT VS Tools and VisualGDB.

                                  • I can get your demo (UseTheLeds) working under Qt Creator (except for the above referenced problem) and displaying on the PC

                                  • I also have a working GUI program developed on the PC (with VS, Qt VS Tools, and VisualGDB) that runs both on the PC and squirts down to the Pi.

                                  • But trying to add the Qled code to the working GUI program breaks everything, possibly in part because the cross compiler chain (c:\sysgcc\raspberry...) cannot find QtSvg includes. When I search for QtSvg, I find it but only in a qt4 dir chain (SysGCC\raspberry\arm-linux-gnueabihf\sysroot\usr\include\qt4...)

                                  Ouch, I'm getting a headache!

                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #27

                                  @BlackDogWhite
                                  Hi
                                  Do you need it to be very scale able ?
                                  Else we could use png for the leds if getting the SVG module to the Pi is
                                  difficult.

                                  However, there was something odd wiht the sample. i will link a new one here as soon as its weekend :)

                                  B 1 Reply Last reply
                                  0
                                  • mrjjM mrjj

                                    @BlackDogWhite
                                    Hi
                                    Do you need it to be very scale able ?
                                    Else we could use png for the leds if getting the SVG module to the Pi is
                                    difficult.

                                    However, there was something odd wiht the sample. i will link a new one here as soon as its weekend :)

                                    B Offline
                                    B Offline
                                    BlackDogWhite
                                    wrote on last edited by
                                    #28

                                    @mrjj First off, I'm up for any help someone is willing to offer. A revised version would be very useful, if only to study the differences and learn something else about how all this works.

                                    I'm going to look, hopefully this afternoon, where my cross compiler install went wrong. Maybe I can get that upgraded to Qt5 so the SVG stuff works. But I certainly wouldn't mind seeing how it would work with PNG's!

                                    mrjjM 1 Reply Last reply
                                    0
                                    • B BlackDogWhite

                                      @mrjj First off, I'm up for any help someone is willing to offer. A revised version would be very useful, if only to study the differences and learn something else about how all this works.

                                      I'm going to look, hopefully this afternoon, where my cross compiler install went wrong. Maybe I can get that upgraded to Qt5 so the SVG stuff works. But I certainly wouldn't mind seeing how it would work with PNG's!

                                      mrjjM Offline
                                      mrjjM Offline
                                      mrjj
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #29

                                      @BlackDogWhite

                                      Hi
                                      Here is other sample that allows copy paste of promoted widget.
                                      Im not sure what was up with the other. the ui file seemed stale.

                                      Anyway, this works. the go button show random shape and color.
                                      I have included only bare minimum of qled files to work.

                                      alt text

                                      https://www.dropbox.com/s/kfti0otv9ez9u28/Myleds.zip?dl=0

                                      B V 2 Replies Last reply
                                      1
                                      • mrjjM mrjj

                                        @BlackDogWhite

                                        Hi
                                        Here is other sample that allows copy paste of promoted widget.
                                        Im not sure what was up with the other. the ui file seemed stale.

                                        Anyway, this works. the go button show random shape and color.
                                        I have included only bare minimum of qled files to work.

                                        alt text

                                        https://www.dropbox.com/s/kfti0otv9ez9u28/Myleds.zip?dl=0

                                        B Offline
                                        B Offline
                                        BlackDogWhite
                                        wrote on last edited by
                                        #30

                                        @mrjj Thanks MrJJ. I was able to copy your code and create a project from scratch using the QLed class to render a button. On the UI I drag in a Widget object and promote it to QLed. It shows up just fine. This is all in Qt Creator 4.5.1, Qt 5.10.1 and Visual Studio 2013 for the compiler.

                                        I was also able to get it to work on the Raspberry Pi using VS 2013 along with Qt VS Tools and VisualGDB added in.

                                        Still have quite a bit to learn, never having done Qt or Pi before. But with your help I've made good progress. Maybe I'll get bold and actually try to get the plugin to work as well, but that's pretty low priority.

                                        Thank you for all your help. You da man!
                                        Ron

                                        mrjjM 1 Reply Last reply
                                        1
                                        • B BlackDogWhite

                                          @mrjj Thanks MrJJ. I was able to copy your code and create a project from scratch using the QLed class to render a button. On the UI I drag in a Widget object and promote it to QLed. It shows up just fine. This is all in Qt Creator 4.5.1, Qt 5.10.1 and Visual Studio 2013 for the compiler.

                                          I was also able to get it to work on the Raspberry Pi using VS 2013 along with Qt VS Tools and VisualGDB added in.

                                          Still have quite a bit to learn, never having done Qt or Pi before. But with your help I've made good progress. Maybe I'll get bold and actually try to get the plugin to work as well, but that's pretty low priority.

                                          Thank you for all your help. You da man!
                                          Ron

                                          mrjjM Offline
                                          mrjjM Offline
                                          mrjj
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #31

                                          @BlackDogWhite
                                          Super :)
                                          well crosscompiling is not easy. So good work.
                                          Since you already have visual studio, it might not be huge work to get the plugin running
                                          but in this case it offer not so much besides seeing the leds in designer and setting type and
                                          color directly in Designer. ( you could also do that with dynamic properties as they are
                                          added to the actual widget type also when using promotion)

                                          1 Reply Last reply
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