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only one QPushButton with QWidget works

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #13

    Do you mean that your application is working fine on your desktop and still not on your target ?

    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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    • K-StrK Offline
      K-StrK Offline
      K-Str
      wrote on last edited by K-Str
      #14

      @SGaist yes
      if the target is the linux host (ubuntu desktop) the application works fine.
      If the target is the raspberry it does not work.
      What about this info:

      Could not load shared library symbols for 3 libraries, e.g. /usr/local/qt5pi/lib/libQt5Widgets.so.5.
      

      Is there something missing?
      Maybe somebody knows more about this problem.

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #15

        What do you get if you call ldd on that file ?

        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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        • K-StrK Offline
          K-StrK Offline
          K-Str
          wrote on last edited by
          #16

          @SGaist , where must I run ldd?
          On the linux host PC or on the raspberry?

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          • K-StrK Offline
            K-StrK Offline
            K-Str
            wrote on last edited by K-Str
            #17

            @SGaist ;
            I will check it tomorrow

            SGaistS 1 Reply Last reply
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            • K-StrK K-Str

              @SGaist ;
              I will check it tomorrow

              SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #18

              @k-str said in only one QPushButton with QWidget works:

              Sorry, I made a mistake

              What do you mean with 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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              • K-StrK Offline
                K-StrK Offline
                K-Str
                wrote on last edited by
                #19

                @SGaist ,
                yesterday I had some trouble with my computer network and I couldn't write a post correcttly.
                Here the output of lcc:
                0_1567681332209_LCC_Teleskop.JPG
                Do yoe need the output also when I run lcc on the on the Linux host?

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #20

                  Looks good. What is the exact error message you're getting when starting your application ?

                  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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                  • K-StrK Offline
                    K-StrK Offline
                    K-Str
                    wrote on last edited by K-Str
                    #21

                    @SGaist ,
                    there are no errors when I run the application. Only warnings during startup as I wrote eight days ago.
                    Now I install everything new because I have some big troubles with the network running a virtual machine (=Hyper-V). I install it now on oracles virtual box.
                    I will see what happens after this.
                    It's crazy!!
                    Now I have an other problem after a new installation:
                    It seems to be a configuration failure:
                    When I start the application I get a problem.
                    What means this? does it miss an egl module?

                    Process /opt/TestWidget/bin/TestWidget created; pid = 2877
                    qt.qpa.egldeviceintegration: Failed to load EGL device integration "eglfs_brcm"
                    EGL library doesn't support Emulator extensions
                    

                    and a window appears
                    0_1567779970953_Bildschirmfoto vom 2019-09-06 16-23-51.png

                    I find no real help in the internet.
                    I use a MPI3508 LCD HDMI display on my raspberry3.
                    Maybe my current configuration cannot handle it.
                    Please has somebody an answer?

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #22

                      Do you mean that you have that error in a virtual machine ?

                      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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                      • K-StrK Offline
                        K-StrK Offline
                        K-Str
                        wrote on last edited by K-Str
                        #23

                        @SGaist ,
                        no I think something went wrong during the installation.
                        What mmeans this:
                        Failed to load EGL device integration "eglfs_brcm"

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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #24

                          It's getting a bit fuzzy here. You seem to have issues both with your desktop machine and RaspberryPi.

                          Can you do a small summary of what is going on and where exactly ?

                          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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                          • K-StrK Offline
                            K-StrK Offline
                            K-Str
                            wrote on last edited by K-Str
                            #25

                            @SGaist , hello to all;
                            I'm sorry for the delay, but I made some investigation.
                            It seems to have just a little problem:
                            When I start the application local on the terminal then I first have to write

                            export  DISPLAY:=0
                            

                            Then it works with a warning

                            libEGL warning: DRI2: failed to authenticate
                            

                            Is there a way to add this command

                            export DISPLAY=:0
                            

                            automaticially before I run the application?

                            jsulmJ 1 Reply Last reply
                            0
                            • K-StrK K-Str

                              @SGaist , hello to all;
                              I'm sorry for the delay, but I made some investigation.
                              It seems to have just a little problem:
                              When I start the application local on the terminal then I first have to write

                              export  DISPLAY:=0
                              

                              Then it works with a warning

                              libEGL warning: DRI2: failed to authenticate
                              

                              Is there a way to add this command

                              export DISPLAY=:0
                              

                              automaticially before I run the application?

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #26

                              @k-str You can write a simple shell script which first sets the env variable and then calls your app and then use this script to start the app.

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

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                              • K-StrK Offline
                                K-StrK Offline
                                K-Str
                                wrote on last edited by
                                #27

                                @jsulm ,
                                thanks for your answer!
                                Yes I know there was somthing like this but I have no Idea how such a script looks.
                                Where can I find an example? It should wor also for debugging

                                JonBJ 1 Reply Last reply
                                0
                                • K-StrK K-Str

                                  @jsulm ,
                                  thanks for your answer!
                                  Yes I know there was somthing like this but I have no Idea how such a script looks.
                                  Where can I find an example? It should wor also for debugging

                                  JonBJ Offline
                                  JonBJ Offline
                                  JonB
                                  wrote on last edited by JonB
                                  #28

                                  @k-str
                                  Two lines in the script:

                                  export DISPLAY=:0
                                  full-path-or-plain-name-of-your-executable
                                  

                                  If you need it for debugging too, change second line to:

                                  full-path-or-plain-name-of-your-debugger   full-path-or-plain-name-of-your-executable
                                  

                                  Assuming your mobile is like Linux (I know nothing about mobiles), if you go

                                  chmod +x the-script
                                  

                                  then the-script is ready to execute.

                                  Alternatively, and better if it works:

                                  I do not know when your program needs that DISPLAY environment variable set, how early on after start up. If it is literally as soon as as it loads then you will have to set the environment variable before invocation. But if it's not, say, until you first try to create the UI, before that (before creating the QApplication) you could use Qt's qputenv() to set that environment variable, e.g. perhaps if it is not already set to something so user can set DISPLAY if needed but your code defaults it to :0 it it is not defined. Doing it this way, if possible, would get rid of the need to have a script wrapper.

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                                  • K-StrK Offline
                                    K-StrK Offline
                                    K-Str
                                    wrote on last edited by K-Str
                                    #29

                                    @JonB ,
                                    thanks for your answer,
                                    Is it also possible to start a script where you can pass the full path application?
                                    Maybe a script which gets the application in a environment variable or so. E.g ??full-path-of-appl??* is the environment variable:
                                    Script

                                    MyGDB
                                    
                                    export DISPLAY=:0
                                    gdbserver ??*full-path-of-appl*??
                                    

                                    this means I have to start the script MyGDB by Qt-creator

                                    JonBJ 1 Reply Last reply
                                    0
                                    • K-StrK K-Str

                                      @JonB ,
                                      thanks for your answer,
                                      Is it also possible to start a script where you can pass the full path application?
                                      Maybe a script which gets the application in a environment variable or so. E.g ??full-path-of-appl??* is the environment variable:
                                      Script

                                      MyGDB
                                      
                                      export DISPLAY=:0
                                      gdbserver ??*full-path-of-appl*??
                                      

                                      this means I have to start the script MyGDB by Qt-creator

                                      JonBJ Offline
                                      JonBJ Offline
                                      JonB
                                      wrote on last edited by JonB
                                      #30

                                      @k-str
                                      Don't follow your question. In a script you can do whatever you could do from the command-line. If you mean: can a script access environment variables, or can a script examine and pass on arguments passed to it, the answer to both is yes.

                                      You need to look at the documentation of whatever shell you are using for its scripting syntax. If you're Linux the standard one these days is bash, I don't know if that applies to whatever mobile. In your question I wonder if you're asking if you can pass an argument to the script on the command line and then pass it on to your gdbserver? In which case in bash script try:

                                      gdbserver "$1"
                                      

                                      If it's in an envivironment variable:

                                      gdbserver "$SOMEVARIABLE"
                                      
                                      1 Reply Last reply
                                      1
                                      • K-StrK Offline
                                        K-StrK Offline
                                        K-Str
                                        wrote on last edited by
                                        #31

                                        @JonB ,
                                        this looks very good. I will try it tomorrow.
                                        Thanks a lot!

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                                        0
                                        • K-StrK Offline
                                          K-StrK Offline
                                          K-Str
                                          wrote on last edited by K-Str
                                          #32

                                          Hi @JonB ,
                                          thanks for your tip but I cannot find a way how to do this.
                                          Is there a way to execute a program by Qt-Creator by running a bash-script on the target machine (=raspberry)?
                                          It should look like :

                                          #!/bin/bash
                                          export DISPLAY=:0
                                          ??run or debug** <*application*>??
                                          

                                          Maybe this is a new topic?

                                          JonBJ jsulmJ 2 Replies Last reply
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