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Porting from QT4.6 to QT5

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  • Q Qt Enthusiast

    @mrjj
    is FALSE and TRUE defined in qt4 code

    JKSHJ Offline
    JKSHJ Offline
    JKSH
    Moderators
    wrote on last edited by
    #20

    @Qt-Enthusiast said in Porting from QT4.6 to QT5:

    is FALSE and TRUE defined in qt4 code

    No.

    Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

    1 Reply Last reply
    1
    • Q Offline
      Q Offline
      Qt Enthusiast
      wrote on last edited by
      #21

      Then why I am getting this error when I am changing the library to Qt5

      jsulmJ JKSHJ 2 Replies Last reply
      0
      • Q Qt Enthusiast

        Then why I am getting this error when I am changing the library to Qt5

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #22

        @Qt-Enthusiast Do you use same compiler for both Qt versions?

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

        Q 1 Reply Last reply
        1
        • Q Qt Enthusiast

          Then why I am getting this error when I am changing the library to Qt5

          JKSHJ Offline
          JKSHJ Offline
          JKSH
          Moderators
          wrote on last edited by
          #23

          @Qt-Enthusiast said in Porting from QT4.6 to QT5:

          Then why I am getting this error when I am changing the library to Qt5

          Because you also changed your compiler?

          Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

          1 Reply Last reply
          2
          • jsulmJ jsulm

            @Qt-Enthusiast Do you use same compiler for both Qt versions?

            Q Offline
            Q Offline
            Qt Enthusiast
            wrote on last edited by
            #24

            @jsulm

            Yes
            I changed just the qt version. What is significance of Q_NULLPTR

            jsulmJ 1 Reply Last reply
            0
            • Q Qt Enthusiast

              @jsulm

              Yes
              I changed just the qt version. What is significance of Q_NULLPTR

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by jsulm
              #25

              @Qt-Enthusiast Well, if you search a bit you will find this in Qt source:

              #ifdef Q_COMPILER_NULLPTR
              # define Q_NULLPTR         nullptr
              #else
              # define Q_NULLPTR         NULL
              #endif
              

              If you have a C++11 compiler Q_NULLPTR will be nullptr, else it will be the old C/C++ NULL.
              You can use Q_NULLPTR if you have to support older C++ compilers which do not know anything about nullptr and newer C++ compilers.

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

              1 Reply Last reply
              4
              • Q Offline
                Q Offline
                Qt Enthusiast
                wrote on last edited by
                #26

                how to solve the following error

                error: no matching function for call to 'QGraphicsTextItem::QGraphicsTextItem(const char [5], int, QGraphicsScene*&)'
                cursor = new QGraphicsTextItem("0, 0", 0, scene);

                jsulmJ 1 Reply Last reply
                0
                • Q Qt Enthusiast

                  how to solve the following error

                  error: no matching function for call to 'QGraphicsTextItem::QGraphicsTextItem(const char [5], int, QGraphicsScene*&)'
                  cursor = new QGraphicsTextItem("0, 0", 0, scene);

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #27

                  @Qt-Enthusiast Go here and check what constructors QGraphicsTextItem has: http://doc.qt.io/qt-5/qgraphicstextitem.html

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

                  1 Reply Last reply
                  2
                  • Q Offline
                    Q Offline
                    Qt Enthusiast
                    wrote on last edited by
                    #28

                    Hi
                    I saw
                    http://doc.qt.io/qt-5/qgraphicsscene.html

                    QGraphicsItem * itemAt(const QPointF &position, const QTransform &deviceTransform) const
                    QGraphicsItem * itemAt(qreal x, qreal y, const QTransform &deviceTransform) const

                    buit still could not find the correct fix for compliation error

                    What const QTransform &deviceTransform shall I use

                    error: no matching function for call to 'QGraphicsScene::itemAt(QPointF&)'
                    QPointF m ;
                    QGraphicsItem *currentItem = scene->itemAt(m);

                    jsulmJ 1 Reply Last reply
                    0
                    • Q Qt Enthusiast

                      Hi
                      I saw
                      http://doc.qt.io/qt-5/qgraphicsscene.html

                      QGraphicsItem * itemAt(const QPointF &position, const QTransform &deviceTransform) const
                      QGraphicsItem * itemAt(qreal x, qreal y, const QTransform &deviceTransform) const

                      buit still could not find the correct fix for compliation error

                      What const QTransform &deviceTransform shall I use

                      error: no matching function for call to 'QGraphicsScene::itemAt(QPointF&)'
                      QPointF m ;
                      QGraphicsItem *currentItem = scene->itemAt(m);

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by jsulm
                      #29

                      @Qt-Enthusiast http://doc.qt.io/qt-5/qgraphicsscene.html#itemAt has two parameters not one.
                      Try to pass QTransform() as second parameter.

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

                      1 Reply Last reply
                      0
                      • Q Offline
                        Q Offline
                        Qt Enthusiast
                        wrote on last edited by
                        #30

                        I am getting issue

                        I am getting errors like

                        file.cxx: In member function 'bool fileMgr::showURL(QString)':
                        error: 'QWebView' does not name a type
                        340 static QWebView *sBrowser = NULL;
                        341 ^

                        I tried to do
                        #include QtWebKitWidgets
                        #include QtWebView

                        It is giving me an error that not able to find file QtWebKitWidgets .

                        can some one help me in solving the problem

                        JKSHJ 1 Reply Last reply
                        0
                        • Q Qt Enthusiast

                          I am getting issue

                          I am getting errors like

                          file.cxx: In member function 'bool fileMgr::showURL(QString)':
                          error: 'QWebView' does not name a type
                          340 static QWebView *sBrowser = NULL;
                          341 ^

                          I tried to do
                          #include QtWebKitWidgets
                          #include QtWebView

                          It is giving me an error that not able to find file QtWebKitWidgets .

                          can some one help me in solving the problem

                          JKSHJ Offline
                          JKSHJ Offline
                          JKSH
                          Moderators
                          wrote on last edited by
                          #31

                          @Qt-Enthusiast said in Porting from QT4.6 to QT5:

                          It is giving me an error that not able to find file QtWebKitWidgets .

                          can some one help me in solving the problem

                          See https://forum.qt.io/topic/76739/webkit-status-2017

                          Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                          1 Reply Last reply
                          3
                          • Q Offline
                            Q Offline
                            Qt Enthusiast
                            wrote on last edited by
                            #32

                            I am using solution

                            #include <QtWebKit/QtWebKit>
                            #include <QtWebKitWidgets/QtWebKitWidgets>

                            is that solution Ok

                            jsulmJ JKSHJ 2 Replies Last reply
                            0
                            • Q Qt Enthusiast

                              I am using solution

                              #include <QtWebKit/QtWebKit>
                              #include <QtWebKitWidgets/QtWebKitWidgets>

                              is that solution Ok

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #33

                              @Qt-Enthusiast Why not simply

                              #include <QWebView>
                              ```?

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

                              1 Reply Last reply
                              0
                              • Q Qt Enthusiast

                                I am using solution

                                #include <QtWebKit/QtWebKit>
                                #include <QtWebKitWidgets/QtWebKitWidgets>

                                is that solution Ok

                                JKSHJ Offline
                                JKSHJ Offline
                                JKSH
                                Moderators
                                wrote on last edited by
                                #34

                                @Qt-Enthusiast said in Porting from QT4.6 to QT5:

                                is that solution Ok

                                Did you read the link I gave you?

                                Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                                1 Reply Last reply
                                0
                                • Q Offline
                                  Q Offline
                                  Qt Enthusiast
                                  wrote on last edited by
                                  #35

                                  yesI read that from there only I found out and I wanted to confirm the same

                                  JKSHJ 1 Reply Last reply
                                  0
                                  • Q Qt Enthusiast

                                    yesI read that from there only I found out and I wanted to confirm the same

                                    JKSHJ Offline
                                    JKSHJ Offline
                                    JKSH
                                    Moderators
                                    wrote on last edited by
                                    #36

                                    @Qt-Enthusiast said in Porting from QT4.6 to QT5:

                                    yesI read that from there only I found out and I wanted to confirm the same

                                    You don't need to ask to confirm. You can confirm yourself by trying it.

                                    Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                                    1 Reply Last reply
                                    3
                                    • Q Offline
                                      Q Offline
                                      Qt Enthusiast
                                      wrote on last edited by
                                      #37

                                      QStyleOptionViewItemV4' is deprecated , what should be the solution to fix this

                                      fatal error: QCleanlooksStyle: No such file or directory
                                      compilation terminated.

                                      how to solve these errors

                                      mrjjM 1 Reply Last reply
                                      0
                                      • Q Qt Enthusiast

                                        QStyleOptionViewItemV4' is deprecated , what should be the solution to fix this

                                        fatal error: QCleanlooksStyle: No such file or directory
                                        compilation terminated.

                                        how to solve these errors

                                        mrjjM Offline
                                        mrjjM Offline
                                        mrjj
                                        Lifetime Qt Champion
                                        wrote on last edited by mrjj
                                        #38

                                        @Qt-Enthusiast
                                        Hi
                                        You can use QStyleOptionViewItem directly.

                                        QCleanlooksStyle is worse. why does app need its includes ?
                                        You can compile the old style plugin by yourself, but now is a good
                                        opportunity to get rid of it. So please tell why app needs it.

                                        Any how, its all explained here
                                        http://doc.qt.io/qt-5/sourcebreaks.html
                                        read Changes to QStyle
                                        It also says how to get it back if needed.

                                        1 Reply Last reply
                                        1
                                        • Q Offline
                                          Q Offline
                                          Qt Enthusiast
                                          wrote on last edited by Qt Enthusiast
                                          #39

                                          error: 'QFusionStyle' does not name a type
                                          59 hdr->setStyle( new QFusionStyle );

                                          I included the file QTwidgets

                                          not working Need help again

                                          1 Reply Last reply
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