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Installation and getting started with first app

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  • K Offline
    K Offline
    KennedyDayala
    wrote on last edited by
    #21

    I agree..but it happened while i tried to install Qt on Linux...help is appreciated more

    Never Ever Give Up

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    • V Offline
      V Offline
      vinb
      wrote on last edited by
      #22

      http://wiki.centos.org/HowTos#head-70ff04f00f6b441f231663b09d7716f4f771a436

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      • K Offline
        K Offline
        KennedyDayala
        wrote on last edited by
        #23

        thanks amn..I will go through that link now..

        btw I have this compiler error when I compiled my demo app on windows using QTreeView which I am planning to display the SystemStorage info

        In file included from ..\IDT_Demo_UI\main.cpp:2:
        ..\IDT_Demo_UI/idt_mainwindow.h:23: error: ISO C++ forbids declaration of 'QSystemStorageInfo' with no type
        ..\IDT_Demo_UI/idt_mainwindow.h:23: error: expected ';' before '*' token

        Never Ever Give Up

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        • V Offline
          V Offline
          vinb
          wrote on last edited by
          #24

          its say were you have to look!
          ĺine 23 of the file idt_mainwindow.h, you didnt end the line with ; or/and you didnt include QSystemStorageInfo

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          • G Offline
            G Offline
            giesbert
            wrote on last edited by
            #25

            Or you only declared the type like
            @
            class QSystemStorageInfo;
            @
            and use it as member. This is not allowed. If you use it for pointers, declaration like above should work.

            Nokia Certified Qt Specialist.
            Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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            • K Offline
              K Offline
              KennedyDayala
              wrote on last edited by
              #26

              Gerolf...I have included
              #include <QSystemStorageInfo>

              and this is the complete compilation report


              @
              Running build steps for project IDT_Demo_UI...
              Configuration unchanged, skipping qmake step.

              Starting: "C:\QtSDK\mingw\bin\mingw32-make.exe" -w

              mingw32-make: Entering directory `E:/Bose/Qt playground/IDT_Demo_UI-build-desktop'

              C:/QtSDK/mingw/bin/mingw32-make -f Makefile.Debug

              mingw32-make[1]: Entering directory `E:/Bose/Qt playground/IDT_Demo_UI-build-desktop'

              g++ -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_GUI_LIB -DQT_CORE_LIB -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\include\QtCore" -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\include\QtGui" -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\include" -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\include\ActiveQt" -I"debug" -I"." -I"..\IDT_Demo_UI" -I"." -I"c:\QtSDK\Desktop\Qt\4.7.2\mingw\mkspecs\win32-g++" -o debug\main.o ..\IDT_Demo_UI\main.cpp

              In file included from ..\IDT_Demo_UI\main.cpp:2:

              ..\IDT_Demo_UI/idt_mainwindow.h:4:30: error: QSystemStorageInfo: No such file or directory

              In file included from ..\IDT_Demo_UI\main.cpp:2:

              ..\IDT_Demo_UI/idt_mainwindow.h:23: error: ISO C++ forbids declaration of 'QSystemStorageInfo' with no type

              ..\IDT_Demo_UI/idt_mainwindow.h:23: error: expected ';' before '*' token

              mingw32-make[1]: Leaving directory `E:/Bose/Qt playground/IDT_Demo_UI-build-desktop'

              mingw32-make: Leaving directory `E:/Bose/Qt playground/IDT_Demo_UI-build-desktop'

              mingw32-make[1]: *** [debug/main.o] Error 1

              mingw32-make: *** [debug] Error 2

              The process "C:\QtSDK\mingw\bin\mingw32-make.exe" exited with code 2.

              Error while building project IDT_Demo_UI (target: Desktop)
              @

              When executing build step 'Make'


              and this is .h file

              @
              #ifndef IDT_MAINWINDOW_H
              #define IDT_MAINWINDOW_H

              #include <QSystemStorageInfo>
              #include <QtGui>
              #include <QMainWindow>

              namespace Ui {
              class IDT_MainWindow;
              }

              class IDT_MainWindow : public QMainWindow
              {
              Q_OBJECT

              public:
              explicit IDT_MainWindow(QWidget *parent = 0);
              ~IDT_MainWindow();

              private:
              Ui::IDT_MainWindow *ui;

              QSystemStorageInfo *sti;
              

              };

              #endif // IDT_MAINWINDOW_H

              @


              Never Ever Give Up

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              • V Offline
                V Offline
                vinb
                wrote on last edited by
                #27

                please wrap your code with @ tag

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                • K Offline
                  K Offline
                  KennedyDayala
                  wrote on last edited by
                  #28

                  I am realy sorry vinb...I didn't get you !! how to rap with a tag ??

                  Never Ever Give Up

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                  • V Offline
                    V Offline
                    vinb
                    wrote on last edited by
                    #29

                    i dont think "QSystemStorageInfo" exist in Qt,
                    only:
                    QSysInfo
                    QSystemLocale
                    QSystemSemaphore
                    QSystemTrayIcon

                    If it is your own made you have to use "" instead of <>.

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                    • V Offline
                      V Offline
                      vinb
                      wrote on last edited by
                      #30

                      use @
                      then your code and end with "@" without the ""

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                      • G Offline
                        G Offline
                        giesbert
                        wrote on last edited by
                        #31

                        Your problem lies more in the beginning of your build output:

                        @
                        ..\IDT_Demo_UI/idt_mainwindow.h:4:30: error: QSystemStorageInfo: No such file or directory
                        @

                        where does QSystemStorageInfo come from?

                        If I googled correctly, it's part of QtMobility, did you install that? did you add the needed include paths in the pro file?

                        Nokia Certified Qt Specialist.
                        Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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                        • K Offline
                          K Offline
                          KennedyDayala
                          wrote on last edited by
                          #32

                          ok...then which class should i use to get the system storage info if it is for desktop application ?

                          Never Ever Give Up

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                          • G Offline
                            G Offline
                            giesbert
                            wrote on last edited by
                            #33

                            Afaik QtMobility may also be used on the Desktop. But you have to set your include paths.

                            Nokia Certified Qt Specialist.
                            Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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                            • K Offline
                              K Offline
                              KennedyDayala
                              wrote on last edited by
                              #34

                              please guide me how to set that ...

                              Never Ever Give Up

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                              • G Offline
                                G Offline
                                giesbert
                                wrote on last edited by
                                #35

                                I said Afaik, not that I did it before ;-)

                                I never used QtMobility

                                Nokia Certified Qt Specialist.
                                Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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                                • G Offline
                                  G Offline
                                  goetz
                                  wrote on last edited by
                                  #36

                                  [quote author="Thomas Kennedy" date="1301490967"]ok...then which class should i use to get the system storage info if it is for desktop application ?[/quote]

                                  I don't know what info you want to get from QSystemStorageInfo, but maybe "QDesktopServices::storageLocation() ":http://doc.qt.nokia.com/4.7/qdesktopservices.html#storageLocation provides what you need.

                                  http://www.catb.org/~esr/faqs/smart-questions.html

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                                  • M Offline
                                    M Offline
                                    mlong
                                    wrote on last edited by
                                    #37

                                    In order to use the QSystemStorageInfo class from Mobility, be sure that in your .pro file you have included the lines

                                    @
                                    CONFIG += mobility
                                    MOBILITY += systeminfo
                                    @

                                    Software Engineer
                                    My views and opinions do not necessarily reflect those of anyone -- living or dead, real or fictional -- in this universe or any other similar multiverse node. Void where prohibited. Your mileage may vary. Caveat emptor.

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                                    • K Offline
                                      K Offline
                                      KennedyDayala
                                      wrote on last edited by
                                      #38

                                      Thanks a lot...

                                      without changing .pro file I am trying with QDir::Drives()..I will update you soon about my results..before that I have another query...

                                      I have placed my controls on the main window by opening 'mainwindow.ui' in design mode..how would I create control variables for those controls in my code using QTCreator ?

                                      Never Ever Give Up

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                                      • A Offline
                                        A Offline
                                        andre
                                        wrote on last edited by
                                        #39

                                        "control variables"? You mean you need a pointer to them?

                                        @
                                        m_ui->myCoolLineEdit->setText("I'm so cool!");
                                        @

                                        works for me. myCoolLineEdit is of course the name you gave the widget in Designer, and m_ui is the member variable that holds the UI class you created.

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                                        • K Offline
                                          K Offline
                                          KennedyDayala
                                          wrote on last edited by
                                          #40

                                          excellent..now i understood this part Andre..I have creaed a QTreeWidget on my MainWindow and coded like tihs..

                                          @
                                          ui->treeWidgetDrives = new QTreeWidget();
                                          ui->treeWidgetDrives->setColumnCount(1);
                                          QStringList strlstHeaders;
                                          strlstHeaders<<tr("Storage Drives");
                                          ui->treeWidgetDrives->setHeaderLabels(strlstHeaders);
                                          @

                                          ...when i run my code nothing is happened to my TreeWidget(no header is assigned)..instead it is showing the properties which i set from 'Edit Tree Widget' dialog !!!

                                          [EDIT: code formatting, please use @-tags, Volker]

                                          Never Ever Give Up

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