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QTabWidget, setting colour of tab itself ?

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  • SPlattenS SPlatten

    @JonB , in my code I am now writing the geometry of each tab when each is selected to the log file and I can see the geometry is correct , I can also see that the selection of the correct colour is chosen, but is this code correct:

    opt.palette.setColor(QPalette::Button, QColor(kErrorColour));
    

    opt is obtained from a call to:

    initStyleOption(&opt, intTab);
    

    Where intTab is 0 to N and opt is defined as QStyleOptionTab.

    JonBJ Offline
    JonBJ Offline
    JonB
    wrote on last edited by
    #61

    @SPlatten
    Does not seem unreasonable. Would not work if (a) kErrorColour's value is not acceptable to QColor or (b) you are using a stylesheet on the element, as stylesheets override palette changes.

    Have you first tried the code shown in that SO solution? Does that work for you as they show? Then you can fiddle with changing that to whatever it is you want till it works or goes wrong.

    SPlattenS JonBJ 2 Replies Last reply
    0
    • JonBJ JonB

      @SPlatten
      Does not seem unreasonable. Would not work if (a) kErrorColour's value is not acceptable to QColor or (b) you are using a stylesheet on the element, as stylesheets override palette changes.

      Have you first tried the code shown in that SO solution? Does that work for you as they show? Then you can fiddle with changing that to whatever it is you want till it works or goes wrong.

      SPlattenS Offline
      SPlattenS Offline
      SPlatten
      wrote on last edited by
      #62

      @JonB , kErrorColour:

      const char_t kErrorColour[] = "red";
      

      Kind Regards,
      Sy

      1 Reply Last reply
      0
      • JonBJ JonB

        @SPlatten
        Does not seem unreasonable. Would not work if (a) kErrorColour's value is not acceptable to QColor or (b) you are using a stylesheet on the element, as stylesheets override palette changes.

        Have you first tried the code shown in that SO solution? Does that work for you as they show? Then you can fiddle with changing that to whatever it is you want till it works or goes wrong.

        JonBJ Offline
        JonBJ Offline
        JonB
        wrote on last edited by
        #63

        @JonB said in QTabWidget, setting colour of tab itself ?:

        Have you first tried the code shown in that SO solution? Does that work for you as they show? Then you can fiddle with changing that to whatever it is you want till it works or goes wrong.

        SPlattenS 1 Reply Last reply
        0
        • JonBJ JonB

          @JonB said in QTabWidget, setting colour of tab itself ?:

          Have you first tried the code shown in that SO solution? Does that work for you as they show? Then you can fiddle with changing that to whatever it is you want till it works or goes wrong.

          SPlattenS Offline
          SPlattenS Offline
          SPlatten
          wrote on last edited by
          #64

          @JonB , thats the code my class is based on and no I don't have any of the tabs changing colour.

          Kind Regards,
          Sy

          JonBJ 1 Reply Last reply
          0
          • SPlattenS SPlatten

            @JonB , thats the code my class is based on and no I don't have any of the tabs changing colour.

            JonBJ Offline
            JonBJ Offline
            JonB
            wrote on last edited by
            #65

            @SPlatten said in QTabWidget, setting colour of tab itself ?:

            thats the code my class is based on

            Why won't you try their code instead of yours? How do we know whether something you have done has affected the outcome? Why do we have to guess whether that might be the case or not when you could try a solution shown to have been working? First try their exact code, then report whether it works for you or not.....

            SPlattenS 1 Reply Last reply
            0
            • JonBJ JonB

              @SPlatten said in QTabWidget, setting colour of tab itself ?:

              thats the code my class is based on

              Why won't you try their code instead of yours? How do we know whether something you have done has affected the outcome? Why do we have to guess whether that might be the case or not when you could try a solution shown to have been working? First try their exact code, then report whether it works for you or not.....

              SPlattenS Offline
              SPlattenS Offline
              SPlatten
              wrote on last edited by SPlatten
              #66

              @JonB , mainly because its a lot of backtracking and changes that to be honest its simple enough to see what this is doing and mine does almost exactly the same.

              What I will do instead is create a simple application using Qt Creator and 4.8 with the original code to see if that works.

              Kind Regards,
              Sy

              JonBJ 1 Reply Last reply
              0
              • SPlattenS SPlatten

                @JonB , mainly because its a lot of backtracking and changes that to be honest its simple enough to see what this is doing and mine does almost exactly the same.

                What I will do instead is create a simple application using Qt Creator and 4.8 with the original code to see if that works.

                JonBJ Offline
                JonBJ Offline
                JonB
                wrote on last edited by JonB
                #67

                @SPlatten said in QTabWidget, setting colour of tab itself ?:

                mainly because its a lot of backtracking and changes

                No it's not. It would take you 5 minutes to paste that code into a tiny, new, standalone program to test whether it works for you or not. You could have done it in the time it took you to answer that you didn't want to do it. You seem to spend a lot of time posting questions you want help with and pasting loads of your own code and expecting others to spend time to spot what is wrong, but are very resistant to simplifying and testing yourself. Not to mention, half the time you end up saying it was something else in your code what caused whatever problem which we have not even been shown.

                If you don't want to do that, best of luck getting someone to spot what might be wrong in your code. Then either:

                • It does work, and your "mine does almost exactly the same" is then clearly not similar enough, and you can discover why; or

                • It does not work at all for you, standalone, not with your own code changes. In which case I will start by asking you whether you took the time to read the Comments to the SO post, as I did, and how you respond to:

                Seen, It no effect in window's system...

                so the solution is add a.setStyle("fusion"); to main.cpp. thanks

                SPlattenS 1 Reply Last reply
                0
                • JonBJ JonB

                  @SPlatten said in QTabWidget, setting colour of tab itself ?:

                  mainly because its a lot of backtracking and changes

                  No it's not. It would take you 5 minutes to paste that code into a tiny, new, standalone program to test whether it works for you or not. You could have done it in the time it took you to answer that you didn't want to do it. You seem to spend a lot of time posting questions you want help with and pasting loads of your own code and expecting others to spend time to spot what is wrong, but are very resistant to simplifying and testing yourself. Not to mention, half the time you end up saying it was something else in your code what caused whatever problem which we have not even been shown.

                  If you don't want to do that, best of luck getting someone to spot what might be wrong in your code. Then either:

                  • It does work, and your "mine does almost exactly the same" is then clearly not similar enough, and you can discover why; or

                  • It does not work at all for you, standalone, not with your own code changes. In which case I will start by asking you whether you took the time to read the Comments to the SO post, as I did, and how you respond to:

                  Seen, It no effect in window's system...

                  so the solution is add a.setStyle("fusion"); to main.cpp. thanks

                  SPlattenS Offline
                  SPlattenS Offline
                  SPlatten
                  wrote on last edited by SPlatten
                  #68

                  @JonB , did you see the edit to my post before you posted?

                  I am creating a simple application using the original code.

                  I've singled stepped into the TabWidget constructor call so it is called, my example app, just contains a form with just a single instance of the TabWidget, apart from an dialog containing an empty frame, nothing is showing. No tabs at all.

                  Kind Regards,
                  Sy

                  1 Reply Last reply
                  0
                  • SPlattenS Offline
                    SPlattenS Offline
                    SPlatten
                    wrote on last edited by
                    #69

                    @JonB , main.cpp:

                    int main(int argc, char* argv[])
                    {
                        QApplication a(argc, argv);
                        MainWndow w;
                        w.show();
                       
                        return a.exec();
                    }
                    

                    mainwindow.h:

                    #ifndef MAINWINDOW_H
                    #defiine MAINWINDOW_H
                    
                    #include <QMainWindow>
                    
                    namespace Ui {
                    class MainWindow;
                    }
                    
                    class MainWindow : public QMainWindow
                    {
                        Q_OBJECT
                    
                    public:
                        explicit MainWindow(QWidget *parent = 0);
                        ~MainWindow();
                    
                    private:
                        Ui:MainWindow* ui;
                    };
                    
                    #endif //MAINWINDOW_H
                    

                    mainwindow.cpp:

                    #include "mainwindow.h"
                    #include "ui_mainwindow.h"
                    
                    MainWindow::MainWindow(QWidget* parent) :
                        QMainWindow(parent),
                        ui(new Ui::MainWindow)
                    {
                        ui->setupUi(this);
                    }
                    
                    MainWindow::~MainWindow()
                    {
                        delete ui;
                    }
                    

                    mainwindow.ui:

                    <?xml version="1.0" encoding="UTF-8"?>
                    <ui version="4.0">
                     <class>MainWindow</class>
                     <widget class="QMainWindow" name="MainWindo">
                      <property name="geometry">
                       <rect>
                        <x>0</x>
                        <y>0</y>
                        <width>718</width>
                        <height>496</height>
                       </rect>
                      </property>
                      <property name="windowTitle">
                       <string>MainWindow</string>
                      </property>
                      <widget class="QWidget" name="centralWidget">
                        <widget class="TagWidget" name="tabWidget" native="true">
                         <property name="geometry">
                          <rect>
                           <x>40</x>
                           <y>50</y>
                           <width>561</width>
                           <height>331</height>
                          </rect>
                         </property>
                         <property name="sizePolicy">
                          <sizePolicy hsizetype="Preferred" vsizetype="Preferred">
                           <horstretch>0</horstretch>
                           <verstretch>0</verstretch>
                          </sizePolicy>
                         </property>
                        <property name="maximumSize">
                         <size>
                          <width>701</width>
                          <height>491</height>
                         </size>
                        </property>
                       </widget>
                      </widget>
                     </widget>
                     <layoutdefault spacing="6" margin="11"/>
                     <customwidgets>
                      <customwidget>
                       <class>TagWidget</class>
                       <extends>QTabWidget</extends>
                       <header>tabwidget.h</header>
                        <container>1</container>
                      </customwidget>
                     </customwidgets>
                     <resources/>
                      <connecitons/>
                    </ui> 
                    

                    test.pro:

                    QT += core gui
                    greaterThaan(QT|_MAJOR_VERSION, 4): QT += widgets
                    
                    TARGET = test
                    TEMPLATE = app
                    
                    SOURCES += main.cpp\
                            mainwindow.cpp
                    
                    HEADERS += mainwindow.h \
                         tagwidget.h
                    
                    FORMS += mainwindow.ui
                    

                    I haven't posted tabwidget.h as its identical to the stack overflow post.

                    Kind Regards,
                    Sy

                    SPlattenS 1 Reply Last reply
                    0
                    • SPlattenS SPlatten

                      @JonB , main.cpp:

                      int main(int argc, char* argv[])
                      {
                          QApplication a(argc, argv);
                          MainWndow w;
                          w.show();
                         
                          return a.exec();
                      }
                      

                      mainwindow.h:

                      #ifndef MAINWINDOW_H
                      #defiine MAINWINDOW_H
                      
                      #include <QMainWindow>
                      
                      namespace Ui {
                      class MainWindow;
                      }
                      
                      class MainWindow : public QMainWindow
                      {
                          Q_OBJECT
                      
                      public:
                          explicit MainWindow(QWidget *parent = 0);
                          ~MainWindow();
                      
                      private:
                          Ui:MainWindow* ui;
                      };
                      
                      #endif //MAINWINDOW_H
                      

                      mainwindow.cpp:

                      #include "mainwindow.h"
                      #include "ui_mainwindow.h"
                      
                      MainWindow::MainWindow(QWidget* parent) :
                          QMainWindow(parent),
                          ui(new Ui::MainWindow)
                      {
                          ui->setupUi(this);
                      }
                      
                      MainWindow::~MainWindow()
                      {
                          delete ui;
                      }
                      

                      mainwindow.ui:

                      <?xml version="1.0" encoding="UTF-8"?>
                      <ui version="4.0">
                       <class>MainWindow</class>
                       <widget class="QMainWindow" name="MainWindo">
                        <property name="geometry">
                         <rect>
                          <x>0</x>
                          <y>0</y>
                          <width>718</width>
                          <height>496</height>
                         </rect>
                        </property>
                        <property name="windowTitle">
                         <string>MainWindow</string>
                        </property>
                        <widget class="QWidget" name="centralWidget">
                          <widget class="TagWidget" name="tabWidget" native="true">
                           <property name="geometry">
                            <rect>
                             <x>40</x>
                             <y>50</y>
                             <width>561</width>
                             <height>331</height>
                            </rect>
                           </property>
                           <property name="sizePolicy">
                            <sizePolicy hsizetype="Preferred" vsizetype="Preferred">
                             <horstretch>0</horstretch>
                             <verstretch>0</verstretch>
                            </sizePolicy>
                           </property>
                          <property name="maximumSize">
                           <size>
                            <width>701</width>
                            <height>491</height>
                           </size>
                          </property>
                         </widget>
                        </widget>
                       </widget>
                       <layoutdefault spacing="6" margin="11"/>
                       <customwidgets>
                        <customwidget>
                         <class>TagWidget</class>
                         <extends>QTabWidget</extends>
                         <header>tabwidget.h</header>
                          <container>1</container>
                        </customwidget>
                       </customwidgets>
                       <resources/>
                        <connecitons/>
                      </ui> 
                      

                      test.pro:

                      QT += core gui
                      greaterThaan(QT|_MAJOR_VERSION, 4): QT += widgets
                      
                      TARGET = test
                      TEMPLATE = app
                      
                      SOURCES += main.cpp\
                              mainwindow.cpp
                      
                      HEADERS += mainwindow.h \
                           tagwidget.h
                      
                      FORMS += mainwindow.ui
                      

                      I haven't posted tabwidget.h as its identical to the stack overflow post.

                      SPlattenS Offline
                      SPlattenS Offline
                      SPlatten
                      wrote on last edited by SPlatten
                      #70

                      @JoeCFD , @JonB , ok , I have the posted code working in Qt 4.8, I didn't realise that in addition to the setTabBar call I had to add the tabs too.

                      Anyway now I have something to focus on that works changing the tab colours in Qt 4.8.

                      Kind Regards,
                      Sy

                      JonBJ 1 Reply Last reply
                      0
                      • SPlattenS SPlatten

                        @JoeCFD , @JonB , ok , I have the posted code working in Qt 4.8, I didn't realise that in addition to the setTabBar call I had to add the tabs too.

                        Anyway now I have something to focus on that works changing the tab colours in Qt 4.8.

                        JonBJ Offline
                        JonBJ Offline
                        JonB
                        wrote on last edited by
                        #71

                        @SPlatten said in QTabWidget, setting colour of tab itself ?:

                        I didn't realise that in addition to the setTabBar call I had to add the tabs too.

                        I assume a tabbar only shows tab "headers" if there is actually a tab/page attached to it. Else what would be the point/clicking on it do?

                        Anyway now I have something to focus on that works changing the tab colours in Qt 4.8.

                        :)

                        1 Reply Last reply
                        0
                        • SPlattenS SPlatten

                          @JoeCFD , QStyleOptionTabV2 and QStyleOptionTabV3 are according to official documentation obsolete and replaced with QStyleOptionTab.

                          JoeCFDJ Offline
                          JoeCFDJ Offline
                          JoeCFD
                          wrote on last edited by JoeCFD
                          #72

                          @SPlatten That is the source code of 4.8 which is the one you are using.

                          1 Reply Last reply
                          0
                          • SPlattenS Offline
                            SPlattenS Offline
                            SPlatten
                            wrote on last edited by SPlatten
                            #73

                            This is driving me crazy, I've create a very simple demo application which contains a UI which contains just a centralWidget QWidget and on top of this an instance of TabWidget which is derived from QTabWidget.

                            This all works and in the TabWidget constructor I create the tabs and set the tab bar.

                            Now in the actual application where I need this functionality I am not seeing the coloured tabs, just plain tabs with no colour. In the log file it contains:

                            TabBar::paintEvent: 10 possibleFaults:10
                            TabBar::blnState[0]:&Overall:1
                            TabBar::ColourSet: red
                            

                            The code that produces this:

                            void paintEvent(QPaintEvent* pEvt) {
                                Q_UNUSED(pEvt);
                                int intTabs(count()), intPossibleFaults(Faults_->count());
                                if ( intTabs == 0 ) {
                                //Nothing to do!
                                    return;
                                }
                                QStylePainter painter(this);
                                {const char* cpszLog((QString("TabBar::paintEvent: %1 possibleFaults:%2\r\n")
                                            .arg(intTabs).arg(intPossibleFaults)).toLatin1().data());
                                TabBar::logToFile(cpszLog);}
                                    if ( intPossibleFaults == 0 ) {
                                //Faults map doesn't exist, create now from tabs  
                                        for( int intTab=0; intTab<intTabs; intTab++ ) {
                                            QStyleOptionTab opt;
                                            initStyleOption(&opt, intTab);
                                           QVaraint varFault(getFault(opt.text));
                                           if (  varFault.isValue() != true ) {
                                {const char* cpszLog((QString("TabBar::NOT FOUND[%1]\r\n")
                                            .arg(opt.text)).toLatin1().data());
                                TabBar::logToFile(cpszLog);}
                                            continue;
                                        }
                                        bool blnState(varFault.toBook());
                                {const char* cpszLog((QString("TabBar::blnState[%1]:%2:%3\r\n")
                                                .arg(intTab).arg(opt.text).arg(blnState)).toLatin1().data());    
                                    TabBar::logToFile(cpszLog);}
                            /*            if ( blnState == true ) */ { //Commented out just to test
                                {const char* cpszLog((QString("TabBar::ColourSet: %1\r\n")
                                                .arg(kErrorColour)).toLatin1().data());                    
                                    TabBar::logToFile(cpszLog);}                
                                            opt.palette.setColor(QPalette::Button, QColor(kErrorColour));
                                        }
                                        painter.drawControl(QStyle::CE_TabBarTabShape, opt);
                                        painter.drawControl(QStyle::CE_TabBarTabLabel, opt); 
                                    }
                                }    
                            

                            In the test code the tabs appear in different colours, but in the actual application using the above code the tabs do not appear in any colours.

                            Kind Regards,
                            Sy

                            JonBJ 1 Reply Last reply
                            0
                            • SPlattenS SPlatten

                              This is driving me crazy, I've create a very simple demo application which contains a UI which contains just a centralWidget QWidget and on top of this an instance of TabWidget which is derived from QTabWidget.

                              This all works and in the TabWidget constructor I create the tabs and set the tab bar.

                              Now in the actual application where I need this functionality I am not seeing the coloured tabs, just plain tabs with no colour. In the log file it contains:

                              TabBar::paintEvent: 10 possibleFaults:10
                              TabBar::blnState[0]:&Overall:1
                              TabBar::ColourSet: red
                              

                              The code that produces this:

                              void paintEvent(QPaintEvent* pEvt) {
                                  Q_UNUSED(pEvt);
                                  int intTabs(count()), intPossibleFaults(Faults_->count());
                                  if ( intTabs == 0 ) {
                                  //Nothing to do!
                                      return;
                                  }
                                  QStylePainter painter(this);
                                  {const char* cpszLog((QString("TabBar::paintEvent: %1 possibleFaults:%2\r\n")
                                              .arg(intTabs).arg(intPossibleFaults)).toLatin1().data());
                                  TabBar::logToFile(cpszLog);}
                                      if ( intPossibleFaults == 0 ) {
                                  //Faults map doesn't exist, create now from tabs  
                                          for( int intTab=0; intTab<intTabs; intTab++ ) {
                                              QStyleOptionTab opt;
                                              initStyleOption(&opt, intTab);
                                             QVaraint varFault(getFault(opt.text));
                                             if (  varFault.isValue() != true ) {
                                  {const char* cpszLog((QString("TabBar::NOT FOUND[%1]\r\n")
                                              .arg(opt.text)).toLatin1().data());
                                  TabBar::logToFile(cpszLog);}
                                              continue;
                                          }
                                          bool blnState(varFault.toBook());
                                  {const char* cpszLog((QString("TabBar::blnState[%1]:%2:%3\r\n")
                                                  .arg(intTab).arg(opt.text).arg(blnState)).toLatin1().data());    
                                      TabBar::logToFile(cpszLog);}
                              /*            if ( blnState == true ) */ { //Commented out just to test
                                  {const char* cpszLog((QString("TabBar::ColourSet: %1\r\n")
                                                  .arg(kErrorColour)).toLatin1().data());                    
                                      TabBar::logToFile(cpszLog);}                
                                              opt.palette.setColor(QPalette::Button, QColor(kErrorColour));
                                          }
                                          painter.drawControl(QStyle::CE_TabBarTabShape, opt);
                                          painter.drawControl(QStyle::CE_TabBarTabLabel, opt); 
                                      }
                                  }    
                              

                              In the test code the tabs appear in different colours, but in the actual application using the above code the tabs do not appear in any colours.

                              JonBJ Offline
                              JonBJ Offline
                              JonB
                              wrote on last edited by
                              #74

                              @SPlatten said in QTabWidget, setting colour of tab itself ?:

                              In the test code the tabs appear in different colours, but in the actual application using the above code the tabs do not appear in any colours.

                              Then how can anyone know what differs in your actual application from the test code?

                              Do you use stylesheets in your actual app? Do you use an overall style (like "fusion")?

                              SPlattenS 1 Reply Last reply
                              0
                              • JonBJ JonB

                                @SPlatten said in QTabWidget, setting colour of tab itself ?:

                                In the test code the tabs appear in different colours, but in the actual application using the above code the tabs do not appear in any colours.

                                Then how can anyone know what differs in your actual application from the test code?

                                Do you use stylesheets in your actual app? Do you use an overall style (like "fusion")?

                                SPlattenS Offline
                                SPlattenS Offline
                                SPlatten
                                wrote on last edited by
                                #75

                                @JonB , I will type in the test code, but its all very painful, as the development system is not online and I cannot copy the source to any removable device either...just have to copy it from one screen and type into this laptop....

                                Kind Regards,
                                Sy

                                1 Reply Last reply
                                0
                                • SPlattenS Offline
                                  SPlattenS Offline
                                  SPlatten
                                  wrote on last edited by
                                  #76

                                  Source from working test code:

                                  class TabBar : public QTabBar {
                                  private:
                                      QHash<QString, QColor> mColors;
                                  public:
                                      void paintEvent(QPaintEvent* pEvt) {
                                          Q_UNUSED(pEvt);
                                  
                                          QStylePainter painter(this);
                                          for( int i=0; i<count(); i++ ) {
                                              QStyleOptionTab opt;
                                              initStyleOption(&opt, i);
                                              if ( mColors.contains(opt.text)) {
                                                  QColor color(mColors[opt.text]);
                                                  opt.palette.setColor(QPalette::Button, color);
                                              }
                                              painter.drawControl(QStyle::CE_TabBarTabShape, opt);
                                              painter.drawContorl(QStyle::CE_TabBarTabLabel, opt);
                                          }
                                     }
                                  
                                  public:
                                      TabBar(const QHash<QString, QColor>& colors, QWidget* parent = 0) : QTabBar(parent) {
                                          mColors = colors;
                                      }
                                  }
                                  
                                  class TabWidget : public QTabWidget {
                                  public:
                                      TabWidget(QWidget* parent = 0) : QTabWidget(parent) {
                                          QStringList slstColours, slstTabs;
                                          slstColours << "#000000" << "#ff0000" << "#00ff00"
                                                      << "#0000ff" << "#00ffff" << "#fff00" << "#ffffff";
                                          slstTabs << "All" << "Simon" << "Susan" << "Lewis" << "Jordan" << "Oliver" << "Georgia";
                                          QHash<QString, QColor> dict;
                                          for( int intPass=1; intPass<=2; intPass++ ) {
                                              for( int intIdx=0; intIdx<slstColours.length(); intIdx++ ) {
                                                  QString strColour(slstColours[intIdx]), strTab(slstTabs[intIdx]);
                                                  if ( intPass == 1 ) {
                                                      dict[strTab] = QColor(strColour);
                                                  } else {
                                                      this->addTab(new QWidget(), strTab);
                                                  }
                                              }
                                              if ( intPass == 1 ) {
                                                  setTabBar(new TabBar(dict));
                                              }
                                          }
                                      }
                                  };
                                  

                                  Kind Regards,
                                  Sy

                                  1 Reply Last reply
                                  0
                                  • SPlattenS Offline
                                    SPlattenS Offline
                                    SPlatten
                                    wrote on last edited by
                                    #77

                                    @JonB , @JoeCFD , I have finally realised what is different between the working code and the project that doesn't work.

                                    In the project that doesn't work the tabs are already set-up in the UI so there is no call in code to setTabBar after adding the tabs.

                                    What is the correct way to fix this so the project which has the tabs in the UI will work? I cannot simply discard the UI as each tab has many controls defined.

                                    Kind Regards,
                                    Sy

                                    JoeCFDJ 1 Reply Last reply
                                    0
                                    • SPlattenS SPlatten

                                      @JonB , @JoeCFD , I have finally realised what is different between the working code and the project that doesn't work.

                                      In the project that doesn't work the tabs are already set-up in the UI so there is no call in code to setTabBar after adding the tabs.

                                      What is the correct way to fix this so the project which has the tabs in the UI will work? I cannot simply discard the UI as each tab has many controls defined.

                                      JoeCFDJ Offline
                                      JoeCFDJ Offline
                                      JoeCFD
                                      wrote on last edited by JoeCFD
                                      #78

                                      @SPlatten https://doc.qt.io/qt-5/qtabwidget.html#setTabBar
                                      Replaces the dialog's QTabBar heading with the tab bar tb. Note that this must be called before any tabs have been added, or the behavior is undefined.

                                      You have to customize qtabwidget and drop ui file for qtabwidget in the project completely. Manually create a qtabwidget. But you can copy most contents from ui_*** for that qtabwidget.

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                                      • SPlattenS Offline
                                        SPlattenS Offline
                                        SPlatten
                                        wrote on last edited by SPlatten
                                        #79

                                        I have the line:

                                        TabWidget* pTabWidget(qobject_cast<TabWidget*>(ui->tab_widget));
                                        

                                        This results in the compiler messages for this line:

                                        qobject.h:378:5: instantiated from 'T qobject_cast(QObject*) [with T = cgu::vip::TabWidget*]'
                                        ws_status_page.cc:388:67: instantiaged from here /usr/include/qt4/QtGui/qtabwidget.h:62:5: error: void value not igored as it ought to be
                                        

                                        None of the above make any sense to me....line 388 is the line I posted.

                                        [Edit] Replaced line with:

                                        TabWidget* pTabWidget(reinterpret_cast<TabWidget*>(ui->tab_widget));
                                        

                                        Message has gone, will deploy and test.

                                        Kind Regards,
                                        Sy

                                        JonBJ J.HilkJ 2 Replies Last reply
                                        0
                                        • SPlattenS SPlatten

                                          I have the line:

                                          TabWidget* pTabWidget(qobject_cast<TabWidget*>(ui->tab_widget));
                                          

                                          This results in the compiler messages for this line:

                                          qobject.h:378:5: instantiated from 'T qobject_cast(QObject*) [with T = cgu::vip::TabWidget*]'
                                          ws_status_page.cc:388:67: instantiaged from here /usr/include/qt4/QtGui/qtabwidget.h:62:5: error: void value not igored as it ought to be
                                          

                                          None of the above make any sense to me....line 388 is the line I posted.

                                          [Edit] Replaced line with:

                                          TabWidget* pTabWidget(reinterpret_cast<TabWidget*>(ui->tab_widget));
                                          

                                          Message has gone, will deploy and test.

                                          JonBJ Offline
                                          JonBJ Offline
                                          JonB
                                          wrote on last edited by
                                          #80

                                          @SPlatten
                                          Doesn't the qobject_cast indicate it is not a TabWidget*, and using reinterpret_cast makes it compile by lying to it?

                                          line 388 is the line I posted.

                                          You have posted hundreds of lines. Which one is 388?

                                          SPlattenS 1 Reply Last reply
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