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Pdf viewer using QDesktopServices

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  • C Offline
    C Offline
    ChaitraMohan
    wrote on last edited by
    #9

    Hi,

    May it was a problem with Evince or what I don't know the pdf was opening via web browser instead of Evince.

    Now I installed the Adobe pdf viewer. With the code following code pdf is opening via Adobe.

    @QString str = "/home/chaitra/Desktop/xyz.pdf";
    QDesktopServices::openUrl(QUrl::fromLocalFile(str));@

    Thank you for the support.

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    • C Offline
      C Offline
      ChaitraMohan
      wrote on last edited by
      #10

      Hi,

      I have one question.
      Does QDesktopServices doesnot work in embedded environment?
      Because when I try to run the application to open in an embedded environment the following error I am getting:
      QDesktopServices::launchwebBrowser not implemented

      Can I know the reason for this?

      Thank you in advance.

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #11

        Hi,

        What embedded environment ?

        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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        • C Offline
          C Offline
          ChaitraMohan
          wrote on last edited by
          #12

          Hi,

          For embedded linux.

          I have cross compiled the Qt4.8.6 giving the following configuration options:
          @./configure -prefix /usr/local/Qt_4.8.6 -embedded arm -platform qws/linux-x86-g++ -xplatform qws/linux-arm-linaro-g++ -static -no-mmx -no-rpath -no-3dnow -no-sse -no-sse2 -no-glib -no-cups -no-largefile -no-accessibility -no-openssl -no-gtkstyle -little-endian -qt-gfx-linuxfb -fontconfig -no-sql-mysql -no-sql-odbc -no-sql-psql -no-sql-sqlite -no-sql-sqlite2 -no-webkit -no-qt3support -nomake examples -nomake demos -nomake docs -nomake translations -qt-freetype -qt-libjpeg -qt-libpng -gfx-transformed@

          The Qt applications are running on the embedded linux. But when I tried to open a pdf using the QDesktopservices:
          @QString str = "/home/chaitra/Desktop/xyz.pdf";
          QDesktopServices::openUrl(QUrl::fromLocalFile(str));@

          I am getting the following error when I run the Qt application:
          QDesktopServices::launchwebBrowser not implemented

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

            It's not an error. You don't have any desktop environment that handles file/program association so how should Qt know what to launch ? Also since you are using QWS, if you had any program able to read your pdf it should also be built to use QWS.

            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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            • C Offline
              C Offline
              ChaitraMohan
              wrote on last edited by
              #14

              Hi,

              bq. You don’t have any desktop environment that handles file/program association so how should Qt know what to launch ?

              I dint understand your sentence. Can you tell me little details about that?

              bq. Also since you are using QWS, if you had any program able to read your pdf it should also be built to use QWS.

              While building Qt source what should I include so that I can get the pdf view?

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

                Desktop Environment: KDE, Gnome, LXDE etc…
                The file type/program association is not something that is automagical, your desktop environment has settings where this information is stored so when you double click on a document/media/whatever it opens one application. QDesktopEnvironment uses these services when available.

                For viewing PDFs, you need to use an external library like poppler

                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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                • C Offline
                  C Offline
                  ChaitraMohan
                  wrote on last edited by
                  #16

                  Yes I have Gnome Desktop environment.
                  When I double click on the document, it opens with application also. Still when I run the application that statement pops up.

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #17

                    Not on your target, otherwise you wouldn't be using QWS

                    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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                    • C Offline
                      C Offline
                      ChaitraMohan
                      wrote on last edited by
                      #18

                      On my target itself I have gnome running.
                      When I double click on the pdf it opens using evince application.

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #19

                        Then if your target is running Gnome, why do you use Qt for Embedded Linux ?

                        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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                        • C Offline
                          C Offline
                          ChaitraMohan
                          wrote on last edited by
                          #20

                          I want to run a Qt application, that opens pdf while I am running the application.

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #21

                            That point is clear. My question is why don't you use a standard Qt, since you already have Gnome running 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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                            • C Offline
                              C Offline
                              ChaitraMohan
                              wrote on last edited by
                              #22

                              I don't want Qt to be installed on the target, so I have used Qt for embedded linux.

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                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #23

                                Qt for Embedded Linux doesn't mean it won't get installed. It means that you can use Qt without a display server like Xorg

                                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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                                • C Offline
                                  C Offline
                                  ChaitraMohan
                                  wrote on last edited by
                                  #24

                                  Yes I understood that.
                                  But I need to open a pdf how do I do that?

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                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #25

                                    Have a look at poppler

                                    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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