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How to use QTextEdit

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  • J jenya7

    @Gojir4 said in How to use QTextEdit:

    @jenya7
    Whe you design your form with the designer, an ui element is created in your widget's code.

    So calling ui->textEditTerminalRx should give you access to your text widget

    It works in mainwindow.cpp. But ui->textEditTerminalRx is not visible in another files.

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #10

    @jenya7 said in How to use QTextEdit:

    But ui->textEditTerminalRx is not visible in another files

    And it should not.

    You don't provide enough information to help you.
    Did you use designer or not?

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

    1 Reply Last reply
    0
    • J jenya7

      @Gojir4 said in How to use QTextEdit:

      @jenya7
      Whe you design your form with the designer, an ui element is created in your widget's code.

      So calling ui->textEditTerminalRx should give you access to your text widget

      It works in mainwindow.cpp. But ui->textEditTerminalRx is not visible in another files.

      Gojir4G Offline
      Gojir4G Offline
      Gojir4
      wrote on last edited by
      #11

      @jenya7 Of course. It is only visible in MainWindow.
      You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text

      void MainWindow::setTerminalText(const QString &txt){
          ui->textEditTerminalRx->setText(txt);
      }
      
      J JonBJ 2 Replies Last reply
      2
      • J jenya7

        I placed QTextEdit on a form.
        I see it in ui->setupUi(this);

        textEditTerminalRx = new QTextEdit(tab_terminal);
        textEditTerminalRx->setObjectName(QString::fromUtf8("textEditTerminalRx"));
        textEditTerminalRx->setGeometry(QRect(80, 100, 521, 91));
        

        How can I set text in textEditTerminalRx? what visibility scope? it's not seen at mainwindow.cpp.

        Gojir4G Offline
        Gojir4G Offline
        Gojir4
        wrote on last edited by
        #12

        @jsulm said in How to use QTextEdit:

        @jenya7 said in How to use QTextEdit:

        But ui->textEditTerminalRx is not visible in another files

        And it should not.

        You don't provide enough information to help you.
        Did you use designer or not?

        Sorry but it is specified on the two first lines.

        @jenya7 said in How to use QTextEdit:

        I placed QTextEdit on a form.
        I see it in ui->setupUi(this);

        1 Reply Last reply
        2
        • Gojir4G Gojir4

          @jenya7 Of course. It is only visible in MainWindow.
          You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text

          void MainWindow::setTerminalText(const QString &txt){
              ui->textEditTerminalRx->setText(txt);
          }
          
          J Offline
          J Offline
          jenya7
          wrote on last edited by jenya7
          #13

          @Gojir4 said in How to use QTextEdit:

          @jenya7 Of course. It is only visible in MainWindow.
          You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text

          void MainWindow::setTerminalText(const QString &txt){
              ui->textEditTerminalRx->setText(txt);
          }
          

          Can I invoke this method from another file? say in sys.cpp I have

          void SYS_SomeFunc ()
          {
              DoSomeTask();
          
               DisplayTextIn_textEditTerminalRx();
          }
          

          Well...It demands some further explanation. I want to provide to a user some indication what’s going on in the project’s running tasks. So instead of flooding him with numerous pop-up QMessageBox I want to print out the messages at my textEditTerminalRx.

          JonBJ 1 Reply Last reply
          0
          • Gojir4G Gojir4

            @jenya7 Of course. It is only visible in MainWindow.
            You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text

            void MainWindow::setTerminalText(const QString &txt){
                ui->textEditTerminalRx->setText(txt);
            }
            
            JonBJ Offline
            JonBJ Offline
            JonB
            wrote on last edited by
            #14

            @Gojir4 said in How to use QTextEdit:

            @jenya7 Of course. It is only visible in MainWindow.
            You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text
            void MainWindow::setTerminalText(const QString &txt){
            ui->textEditTerminalRx->setText(txt);
            }

            OOI, how does this help? How does a different class/module/form get any access to the MainWindow instance to call that method, any more than to the ui?

            Gojir4G 1 Reply Last reply
            0
            • J jenya7

              @Gojir4 said in How to use QTextEdit:

              @jenya7 Of course. It is only visible in MainWindow.
              You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text

              void MainWindow::setTerminalText(const QString &txt){
                  ui->textEditTerminalRx->setText(txt);
              }
              

              Can I invoke this method from another file? say in sys.cpp I have

              void SYS_SomeFunc ()
              {
                  DoSomeTask();
              
                   DisplayTextIn_textEditTerminalRx();
              }
              

              Well...It demands some further explanation. I want to provide to a user some indication what’s going on in the project’s running tasks. So instead of flooding him with numerous pop-up QMessageBox I want to print out the messages at my textEditTerminalRx.

              JonBJ Offline
              JonBJ Offline
              JonB
              wrote on last edited by JonB
              #15

              @jenya7 said in How to use QTextEdit:

              Well...It demands some further explanation. I want to provide to a user some indication what’s going on in the project’s running tasks. So instead of flooding him with numerous pop-up QMessageBox I want to print out the messages at my textEditTerminalRx.

              You either need to decide to gain access to the main window's text edit so that you can set its text directly, or (perhaps more suitable for your use case) you could have it raise a signal when stuff is"going on", and the main window could place a slot on that signal so that it updates the text edit.

              J 1 Reply Last reply
              1
              • JonBJ JonB

                @jenya7 said in How to use QTextEdit:

                Well...It demands some further explanation. I want to provide to a user some indication what’s going on in the project’s running tasks. So instead of flooding him with numerous pop-up QMessageBox I want to print out the messages at my textEditTerminalRx.

                You either need to decide to gain access to the main window's text edit so that you can set its text directly, or (perhaps more suitable for your use case) you could have it raise a signal when stuff is"going on", and the main window could place a slot on that signal so that it updates the text edit.

                J Offline
                J Offline
                jenya7
                wrote on last edited by
                #16

                @JonB said in How to use QTextEdit:

                @jenya7 said in How to use QTextEdit:

                Well...It demands some further explanation. I want to provide to a user some indication what’s going on in the project’s running tasks. So instead of flooding him with numerous pop-up QMessageBox I want to print out the messages at my textEditTerminalRx.

                You either need to decide to gain access to the main window's text edit so that you can set its text directly, or (perhaps more suitable for your use case) you could have it raise a signal when stuff is"going on", and the main window could place a slot on that signal so that it updates the text edit.

                Looks like fun. How do I do that?

                JonBJ 1 Reply Last reply
                0
                • J jenya7

                  @JonB said in How to use QTextEdit:

                  @jenya7 said in How to use QTextEdit:

                  Well...It demands some further explanation. I want to provide to a user some indication what’s going on in the project’s running tasks. So instead of flooding him with numerous pop-up QMessageBox I want to print out the messages at my textEditTerminalRx.

                  You either need to decide to gain access to the main window's text edit so that you can set its text directly, or (perhaps more suitable for your use case) you could have it raise a signal when stuff is"going on", and the main window could place a slot on that signal so that it updates the text edit.

                  Looks like fun. How do I do that?

                  JonBJ Offline
                  JonBJ Offline
                  JonB
                  wrote on last edited by
                  #17

                  @jenya7
                  You start by reading https://doc.qt.io/qt-5/signalsandslots.html, or similar, which explains Qt's signals & slots. You're going to need that anyway to get anywhere in Qt, so it's not time wasted!

                  Then in principle you declare a signal out of your other file where you are "doing stuff which must be reported", include that header file into main window so it knows about the signal, and have main window put a slot on that signal. The slot does the setText(). The signalling class can pass any necessary arguments (e..g what to write, how far it's got...).

                  Your "project’s running tasks" sound like you want them to run in a thread, so that they do not block the UI? And they would send these signals from their thread to be acted on in the main window UI thread.

                  1 Reply Last reply
                  3
                  • J Offline
                    J Offline
                    jenya7
                    wrote on last edited by
                    #18

                    Can I create signals and slots withing a class only? Can I do it in a file like

                    my_file.cpp:

                    #include ''my_file.h''

                    slot my_slot;
                    signal my_signal;

                    void Func(void)
                    {
                    }

                    //end of file

                    mrjjM 1 Reply Last reply
                    0
                    • J jenya7

                      Can I create signals and slots withing a class only? Can I do it in a file like

                      my_file.cpp:

                      #include ''my_file.h''

                      slot my_slot;
                      signal my_signal;

                      void Func(void)
                      {
                      }

                      //end of file

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #19

                      @jenya7
                      Hi
                      Yes its only with classes.
                      And it needs to derive from QObject and have the Q_OBJECT macro and be in a .h file.

                      class MyClass : public QObject
                      {
                      Q_OBJECT
                      ....

                      1 Reply Last reply
                      2
                      • J Offline
                        J Offline
                        jenya7
                        wrote on last edited by
                        #20

                        Thank you.

                        1 Reply Last reply
                        0
                        • JonBJ JonB

                          @Gojir4 said in How to use QTextEdit:

                          @jenya7 Of course. It is only visible in MainWindow.
                          You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text
                          void MainWindow::setTerminalText(const QString &txt){
                          ui->textEditTerminalRx->setText(txt);
                          }

                          OOI, how does this help? How does a different class/module/form get any access to the MainWindow instance to call that method, any more than to the ui?

                          Gojir4G Offline
                          Gojir4G Offline
                          Gojir4
                          wrote on last edited by
                          #21

                          @JonB said in How to use QTextEdit:

                          @Gojir4 said in How to use QTextEdit:

                          @jenya7 Of course. It is only visible in MainWindow.
                          You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text
                          void MainWindow::setTerminalText(const QString &txt){
                          ui->textEditTerminalRx->setText(txt);
                          }

                          OOI, how does this help? How does a different class/module/form get any access to the MainWindow instance to call that method, any more than to the ui?

                          @JonB said in How to use QTextEdit:

                          You either need to decide to gain access to the main window's text edit so that you can set its text directly, or (perhaps more suitable for your use case) you could have it raise a signal when stuff is"going on", and the main window could place a slot on that signal so that it updates the text edit.

                          :P thanks for this moment of fun

                          JonBJ 1 Reply Last reply
                          0
                          • Gojir4G Gojir4

                            @JonB said in How to use QTextEdit:

                            @Gojir4 said in How to use QTextEdit:

                            @jenya7 Of course. It is only visible in MainWindow.
                            You need to add a method (or slot) in your MainWindow allowing to access the control, or to set the text
                            void MainWindow::setTerminalText(const QString &txt){
                            ui->textEditTerminalRx->setText(txt);
                            }

                            OOI, how does this help? How does a different class/module/form get any access to the MainWindow instance to call that method, any more than to the ui?

                            @JonB said in How to use QTextEdit:

                            You either need to decide to gain access to the main window's text edit so that you can set its text directly, or (perhaps more suitable for your use case) you could have it raise a signal when stuff is"going on", and the main window could place a slot on that signal so that it updates the text edit.

                            :P thanks for this moment of fun

                            JonBJ Offline
                            JonBJ Offline
                            JonB
                            wrote on last edited by
                            #22

                            @Gojir4 said in How to use QTextEdit:

                            :P thanks for this moment of fun

                            ??

                            1 Reply Last reply
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