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  4. Text is not updated in qwidget.

Text is not updated in qwidget.

Scheduled Pinned Locked Moved Unsolved Mobile and Embedded
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  • SGaistS SGaist

    Can you show the latest complete version of that part of your code ?

    With only I removed something and it still doesn't work, there's no way to debug your problem.

    S Offline
    S Offline
    sootoo23
    wrote on last edited by sootoo23
    #19

    @SGaist

    ------------mainwindow.cpp------------
    MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
    {
    ...
    ...
    #if (0)
    //Removed endless loop timer
    Hometimer = new QTimer(this);
    connect(Hometimer, SIGNAL(timeout()),this,SLOT(HomeInfo_Update()));
    Hometimer->start(1000);
    #endif
    }
    void MainWindow::HomeInfo_Update()
    {
    ...
    ...
    ui->lb_HomeClk->setText(QString(TimeBuf));
    ...
    }

    ------------menuQwidget.cpp------------
    wnd_menu::wnd_menu(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::wnd_menu)
    {
    ...
    ...
    #if (0)
    //Removed endless loop timer
    Menu_Timer = new QTimer;
    connect(Menu_Timer, SIGNAL (timeout()), this, SLOT(MenuInfo_Update()));
    Menu_Timer->start(1000);
    Menu_Timer->blockSignals(true);
    #endif
    }

    void wnd_menu::MenuInfo_Update()
    {
    ...
    ...
    ui->lb_MenuClk->setText(QString(TimeBuf));
    ...
    ...
    }

    jsulmJ K 2 Replies Last reply
    0
    • S sootoo23

      @SGaist

      ------------mainwindow.cpp------------
      MainWindow::MainWindow(QWidget *parent) :
      QMainWindow(parent),
      ui(new Ui::MainWindow)
      {
      ...
      ...
      #if (0)
      //Removed endless loop timer
      Hometimer = new QTimer(this);
      connect(Hometimer, SIGNAL(timeout()),this,SLOT(HomeInfo_Update()));
      Hometimer->start(1000);
      #endif
      }
      void MainWindow::HomeInfo_Update()
      {
      ...
      ...
      ui->lb_HomeClk->setText(QString(TimeBuf));
      ...
      }

      ------------menuQwidget.cpp------------
      wnd_menu::wnd_menu(QWidget *parent) :
      QWidget(parent),
      ui(new Ui::wnd_menu)
      {
      ...
      ...
      #if (0)
      //Removed endless loop timer
      Menu_Timer = new QTimer;
      connect(Menu_Timer, SIGNAL (timeout()), this, SLOT(MenuInfo_Update()));
      Menu_Timer->start(1000);
      Menu_Timer->blockSignals(true);
      #endif
      }

      void wnd_menu::MenuInfo_Update()
      {
      ...
      ...
      ui->lb_MenuClk->setText(QString(TimeBuf));
      ...
      ...
      }

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #20

      @sootoo23

      • Are the slots you connected to the timers called?
      • Is TimeBuf set when these slots are called?

      //Removed endless loop timer - this is not the kind of endless loop I mentioned. It is fine to use timers this way. The problem is somewhere else. You need to debug your app or upload the code to somewhere so we can take a look.

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

      1 Reply Last reply
      1
      • S sootoo23

        @SGaist

        ------------mainwindow.cpp------------
        MainWindow::MainWindow(QWidget *parent) :
        QMainWindow(parent),
        ui(new Ui::MainWindow)
        {
        ...
        ...
        #if (0)
        //Removed endless loop timer
        Hometimer = new QTimer(this);
        connect(Hometimer, SIGNAL(timeout()),this,SLOT(HomeInfo_Update()));
        Hometimer->start(1000);
        #endif
        }
        void MainWindow::HomeInfo_Update()
        {
        ...
        ...
        ui->lb_HomeClk->setText(QString(TimeBuf));
        ...
        }

        ------------menuQwidget.cpp------------
        wnd_menu::wnd_menu(QWidget *parent) :
        QWidget(parent),
        ui(new Ui::wnd_menu)
        {
        ...
        ...
        #if (0)
        //Removed endless loop timer
        Menu_Timer = new QTimer;
        connect(Menu_Timer, SIGNAL (timeout()), this, SLOT(MenuInfo_Update()));
        Menu_Timer->start(1000);
        Menu_Timer->blockSignals(true);
        #endif
        }

        void wnd_menu::MenuInfo_Update()
        {
        ...
        ...
        ui->lb_MenuClk->setText(QString(TimeBuf));
        ...
        ...
        }

        K Offline
        K Offline
        kumararajas
        wrote on last edited by kumararajas
        #21

        @sootoo23 Both, setText functions does not get called at all. Hence, text is not displayed.

        And I don't know why 'blocksignals' function is used here.

        jsulmJ 1 Reply Last reply
        3
        • K Offline
          K Offline
          kumararajas
          wrote on last edited by
          #22
          This post is deleted!
          1 Reply Last reply
          0
          • K kumararajas

            @sootoo23 Both, setText functions does not get called at all. Hence, text is not displayed.

            And I don't know why 'blocksignals' function is used here.

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #23

            @kumararajas said in Text is not updated in qwidget.:

            And I don't know why 'blocksignals' function is used here.

            Wow, I didn't notice at all!

            @sootoo23 Why do you block the timer signals? This way you cannot expect the signals to be emitted and the slots called!

            Menu_Timer->blockSignals(true); // WHY?

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

            S 2 Replies Last reply
            4
            • jsulmJ jsulm

              @kumararajas said in Text is not updated in qwidget.:

              And I don't know why 'blocksignals' function is used here.

              Wow, I didn't notice at all!

              @sootoo23 Why do you block the timer signals? This way you cannot expect the signals to be emitted and the slots called!

              Menu_Timer->blockSignals(true); // WHY?
              S Offline
              S Offline
              sootoo23
              wrote on last edited by sootoo23
              #24

              @jsulm @kumararajas
              The main problem is not a block signal.
              The Timer is already blocked from use.

              Timer has nothing to do with the problem.

              The code that I uploaded is the code that removed the infinite loop (timer).

              Mainwindow.cpp -> menuQwidget->show();
              menuQwidget.cpp -> Dialog_Keypad->exec();

              ------------DialogKeypad.cpp------------
              my problem... not updated >>>>> LB_SetVal->setText(SetValue);

              1 Reply Last reply
              0
              • jsulmJ jsulm

                @kumararajas said in Text is not updated in qwidget.:

                And I don't know why 'blocksignals' function is used here.

                Wow, I didn't notice at all!

                @sootoo23 Why do you block the timer signals? This way you cannot expect the signals to be emitted and the slots called!

                Menu_Timer->blockSignals(true); // WHY?
                S Offline
                S Offline
                sootoo23
                wrote on last edited by sootoo23
                #25

                @jsulm @kumararajas
                ------------mainwindow.cpp------------
                MainWindow::MainWindow(QWidget *parent) :
                QMainWindow(parent),
                ui(new Ui::MainWindow)
                {
                ...
                ...
                #if (0)
                //Removed endless loop timer
                Hometimer = new QTimer(this);
                connect(Hometimer, SIGNAL(timeout()),this,SLOT(HomeInfo_Update()));
                Hometimer->start(1000);
                #endif
                }
                void MainWindow::HomeInfo_Update()
                {
                ...
                ...
                ui->lb_HomeClk->setText(QString(TimeBuf));
                ...
                }

                ------------menuQwidget.cpp------------
                wnd_menu::wnd_menu(QWidget *parent) :
                QWidget(parent),
                ui(new Ui::wnd_menu)
                {
                ...
                ...
                #if (0)
                //Removed endless loop timer
                Menu_Timer = new QTimer;
                connect(Menu_Timer, SIGNAL (timeout()), this, SLOT(MenuInfo_Update()));
                Menu_Timer->start(1000);
                Menu_Timer->blockSignals(true);
                #endif
                }

                void wnd_menu::MenuInfo_Update()
                {
                ...
                ...
                ui->lb_MenuClk->setText(QString(TimeBuf));
                ...
                ...
                }

                ------------DialogKeypad.cpp------------
                Dialog_Keypad::Dialog_Keypad(QWidget *parent) :
                QDialog(parent),
                ui(new Ui::Dialog_Keypad)
                {
                ui->setupUi(this);

                QString img_path = "/images/Keypad.jpg";
QImage img(img_path);    
QPixmap buf = QPixmap::fromImage(img);    
QGraphicsScene* MenuScene = new QGraphicsScene;

ui->KeypadFrame->setScene(MenuScene);
MenuScene->addPixmap(buf);

//text color setting
QPalette* palette = new QPalette();
palette->setColor(QPalette::WindowText,Qt::yellow);
ui->lb_SettingValue->setPalette(*palette);	


connect(ui->Keypad_Num0, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num1, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num2, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num3, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num4, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num5, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num6, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num7, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num8, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num9, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Dot,  SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));

KeyPadMapper.setMapping(ui->Keypad_Num0, 0);
KeyPadMapper.setMapping(ui->Keypad_Num1, 1);
KeyPadMapper.setMapping(ui->Keypad_Num2, 2);
KeyPadMapper.setMapping(ui->Keypad_Num3, 3);
KeyPadMapper.setMapping(ui->Keypad_Num4, 4);
KeyPadMapper.setMapping(ui->Keypad_Num5, 5);
KeyPadMapper.setMapping(ui->Keypad_Num6, 6);
KeyPadMapper.setMapping(ui->Keypad_Num7, 7);
KeyPadMapper.setMapping(ui->Keypad_Num8, 8);
KeyPadMapper.setMapping(ui->Keypad_Num9, 9);
KeyPadMapper.setMapping(ui->Keypad_Dot, 100);

connect(&KeyPadMapper, SIGNAL(mapped(int)), this, SLOT(SetKeypadData(int)));

                }

                void Dialog_Keypad::SetKeypadData(int val)
                {
                char keypadBuf[30] = {0,};
                QLabel* LB_SetVal;

                if(CurKeypadType == KEYPAD_NORMAL)
	LB_SetVal = ui->lb_SettingValue;
else if(CurKeypadType == KEYPAD_NETWORK)
	LB_SetVal = ui->lb_NetSetVal;
else if(CurKeypadType == KEYPAD_PASSWORD)
	LB_SetVal = ui->lb_PWSetVal;
else 
	LB_SetVal = ui->lb_SettingValue;

if(CurKeypadType == KEYPAD_PASSWORD)
{
	if(LB_SetVal->text().size() > 3)
	{
		printf("[%s] Password Length Over. :%s \n", __FUNCTION__, QByteArray(LB_SetVal->text().toLocal8Bit()).data());
		return;
	}
	
	SetValue = SetValue + QString::number(val);
	sprintf((char *)keypadBuf, "%s%s", QByteArray(LB_SetVal->text().toLocal8Bit()).data(), "*");
	LB_SetVal->setText(QString(keypadBuf));
	return;
}
else if(CurKeypadType == KEYPAD_NETWORK)
{
	if(LB_SetVal->text().size() > 14)
	{
		printf("[%s] Network Setting Str Length Over.\n", __FUNCTION__);
		return;
	}
	
	if(val == 100) //dot.
		sprintf((char *)keypadBuf, "%s%s", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),".");
	else if((LB_SetVal->text().size() == 3)
			|| (LB_SetVal->text().size() == 7)
			|| (LB_SetVal->text().size() == 11))
		sprintf((char *)keypadBuf, "%s.%d", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),val);
	else
		sprintf((char *)keypadBuf, "%s%d", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),val);
}
else
{		
	if(val == 100) //dot.
		sprintf((char *)keypadBuf, "%s%s", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),".");
	else
		sprintf((char *)keypadBuf, "%s%d", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),val);
}

SetValue = QString(keypadBuf);
 My Problem >> LB_SetVal->setText(SetValue);

//qApp->processEvents();
//qApp->sendPostedEvents();
//qApp->processEvents(QEventLoop::ExcludeUserInput);
//LB_SetVal->repaint();
//LB_SetVal->parentWidget()->repaint();
//LB_SetVal->update();
//LB_SetVal->parentWidget()->update();

printf("[%s] %s\n", __FUNCTION__, keypadBuf);

                }

                J.HilkJ 1 Reply Last reply
                0
                • S sootoo23

                  @jsulm @kumararajas
                  ------------mainwindow.cpp------------
                  MainWindow::MainWindow(QWidget *parent) :
                  QMainWindow(parent),
                  ui(new Ui::MainWindow)
                  {
                  ...
                  ...
                  #if (0)
                  //Removed endless loop timer
                  Hometimer = new QTimer(this);
                  connect(Hometimer, SIGNAL(timeout()),this,SLOT(HomeInfo_Update()));
                  Hometimer->start(1000);
                  #endif
                  }
                  void MainWindow::HomeInfo_Update()
                  {
                  ...
                  ...
                  ui->lb_HomeClk->setText(QString(TimeBuf));
                  ...
                  }

                  ------------menuQwidget.cpp------------
                  wnd_menu::wnd_menu(QWidget *parent) :
                  QWidget(parent),
                  ui(new Ui::wnd_menu)
                  {
                  ...
                  ...
                  #if (0)
                  //Removed endless loop timer
                  Menu_Timer = new QTimer;
                  connect(Menu_Timer, SIGNAL (timeout()), this, SLOT(MenuInfo_Update()));
                  Menu_Timer->start(1000);
                  Menu_Timer->blockSignals(true);
                  #endif
                  }

                  void wnd_menu::MenuInfo_Update()
                  {
                  ...
                  ...
                  ui->lb_MenuClk->setText(QString(TimeBuf));
                  ...
                  ...
                  }

                  ------------DialogKeypad.cpp------------
                  Dialog_Keypad::Dialog_Keypad(QWidget *parent) :
                  QDialog(parent),
                  ui(new Ui::Dialog_Keypad)
                  {
                  ui->setupUi(this);

                  QString img_path = "/images/Keypad.jpg";
QImage img(img_path);    
QPixmap buf = QPixmap::fromImage(img);    
QGraphicsScene* MenuScene = new QGraphicsScene;

ui->KeypadFrame->setScene(MenuScene);
MenuScene->addPixmap(buf);

//text color setting
QPalette* palette = new QPalette();
palette->setColor(QPalette::WindowText,Qt::yellow);
ui->lb_SettingValue->setPalette(*palette);	


connect(ui->Keypad_Num0, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num1, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num2, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num3, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num4, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num5, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num6, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num7, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num8, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num9, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Dot,  SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));

KeyPadMapper.setMapping(ui->Keypad_Num0, 0);
KeyPadMapper.setMapping(ui->Keypad_Num1, 1);
KeyPadMapper.setMapping(ui->Keypad_Num2, 2);
KeyPadMapper.setMapping(ui->Keypad_Num3, 3);
KeyPadMapper.setMapping(ui->Keypad_Num4, 4);
KeyPadMapper.setMapping(ui->Keypad_Num5, 5);
KeyPadMapper.setMapping(ui->Keypad_Num6, 6);
KeyPadMapper.setMapping(ui->Keypad_Num7, 7);
KeyPadMapper.setMapping(ui->Keypad_Num8, 8);
KeyPadMapper.setMapping(ui->Keypad_Num9, 9);
KeyPadMapper.setMapping(ui->Keypad_Dot, 100);

connect(&KeyPadMapper, SIGNAL(mapped(int)), this, SLOT(SetKeypadData(int)));

                  }

                  void Dialog_Keypad::SetKeypadData(int val)
                  {
                  char keypadBuf[30] = {0,};
                  QLabel* LB_SetVal;

                  if(CurKeypadType == KEYPAD_NORMAL)
	LB_SetVal = ui->lb_SettingValue;
else if(CurKeypadType == KEYPAD_NETWORK)
	LB_SetVal = ui->lb_NetSetVal;
else if(CurKeypadType == KEYPAD_PASSWORD)
	LB_SetVal = ui->lb_PWSetVal;
else 
	LB_SetVal = ui->lb_SettingValue;

if(CurKeypadType == KEYPAD_PASSWORD)
{
	if(LB_SetVal->text().size() > 3)
	{
		printf("[%s] Password Length Over. :%s \n", __FUNCTION__, QByteArray(LB_SetVal->text().toLocal8Bit()).data());
		return;
	}
	
	SetValue = SetValue + QString::number(val);
	sprintf((char *)keypadBuf, "%s%s", QByteArray(LB_SetVal->text().toLocal8Bit()).data(), "*");
	LB_SetVal->setText(QString(keypadBuf));
	return;
}
else if(CurKeypadType == KEYPAD_NETWORK)
{
	if(LB_SetVal->text().size() > 14)
	{
		printf("[%s] Network Setting Str Length Over.\n", __FUNCTION__);
		return;
	}
	
	if(val == 100) //dot.
		sprintf((char *)keypadBuf, "%s%s", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),".");
	else if((LB_SetVal->text().size() == 3)
			|| (LB_SetVal->text().size() == 7)
			|| (LB_SetVal->text().size() == 11))
		sprintf((char *)keypadBuf, "%s.%d", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),val);
	else
		sprintf((char *)keypadBuf, "%s%d", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),val);
}
else
{		
	if(val == 100) //dot.
		sprintf((char *)keypadBuf, "%s%s", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),".");
	else
		sprintf((char *)keypadBuf, "%s%d", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),val);
}

SetValue = QString(keypadBuf);
 My Problem >> LB_SetVal->setText(SetValue);

//qApp->processEvents();
//qApp->sendPostedEvents();
//qApp->processEvents(QEventLoop::ExcludeUserInput);
//LB_SetVal->repaint();
//LB_SetVal->parentWidget()->repaint();
//LB_SetVal->update();
//LB_SetVal->parentWidget()->update();

printf("[%s] %s\n", __FUNCTION__, keypadBuf);

                  }

                  J.HilkJ Offline
                  J.HilkJ Offline
                  J.Hilk
                  Moderators
                  wrote on last edited by
                  #26

                  @sootoo23 Maybe you're doing the mapping wrong? I don't use it often, once in years I believe. So I'm not sure.

                  Since I'm assuming your running Qt 5.X try it with lambdas

                  replace

                  connect(ui->Keypad_Num0, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num1, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num2, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num3, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num4, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num5, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num6, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num7, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num8, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num9, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Dot,  SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));

KeyPadMapper.setMapping(ui->Keypad_Num0, 0);
KeyPadMapper.setMapping(ui->Keypad_Num1, 1);
KeyPadMapper.setMapping(ui->Keypad_Num2, 2);
KeyPadMapper.setMapping(ui->Keypad_Num3, 3);
KeyPadMapper.setMapping(ui->Keypad_Num4, 4);
KeyPadMapper.setMapping(ui->Keypad_Num5, 5);
KeyPadMapper.setMapping(ui->Keypad_Num6, 6);
KeyPadMapper.setMapping(ui->Keypad_Num7, 7);
KeyPadMapper.setMapping(ui->Keypad_Num8, 8);
KeyPadMapper.setMapping(ui->Keypad_Num9, 9);
KeyPadMapper.setMapping(ui->Keypad_Dot, 100);

connect(&KeyPadMapper, SIGNAL(mapped(int)), this, SLOT(SetKeypadData(int)));

                  with

                  connect(ui->Keypad_Num0, QPusButton::clicked, this, [=]{SetKeypadData(0);});
connect(ui->Keypad_Num1, QPusButton::clicked, this, [=]{SetKeypadData(1);});
connect(ui->Keypad_Num2, QPusButton::clicked, this, [=]{SetKeypadData(2);});
connect(ui->Keypad_Num3, QPusButton::clicked, this, [=]{SetKeypadData(3);});
connect(ui->Keypad_Num4, QPusButton::clicked, this, [=]{SetKeypadData(4);});
connect(ui->Keypad_Num5, QPusButton::clicked, this, [=]{SetKeypadData(5);});
connect(ui->Keypad_Num6, QPusButton::clicked, this, [=]{SetKeypadData(6);});
connect(ui->Keypad_Num7, QPusButton::clicked, this, [=]{SetKeypadData(7);});
connect(ui->Keypad_Num8, QPusButton::clicked, this, [=]{SetKeypadData(8);});
connect(ui->Keypad_Num9, QPusButton::clicked, this, [=]{SetKeypadData(9);});
connect(ui->Keypad_Dot,  QPusButton::clicked, this, [=]{SetKeypadData(100);});

                  Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct

                  Q: What's that?
                  A: It's blue light.
                  Q: What does it do?
                  A: It turns blue.

                  S 1 Reply Last reply
                  0
                  • J.HilkJ J.Hilk

                    @sootoo23 Maybe you're doing the mapping wrong? I don't use it often, once in years I believe. So I'm not sure.

                    Since I'm assuming your running Qt 5.X try it with lambdas

                    replace

                    connect(ui->Keypad_Num0, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num1, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num2, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num3, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num4, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num5, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num6, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num7, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num8, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Num9, SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));
connect(ui->Keypad_Dot,  SIGNAL(clicked()), &KeyPadMapper, SLOT(map()));

KeyPadMapper.setMapping(ui->Keypad_Num0, 0);
KeyPadMapper.setMapping(ui->Keypad_Num1, 1);
KeyPadMapper.setMapping(ui->Keypad_Num2, 2);
KeyPadMapper.setMapping(ui->Keypad_Num3, 3);
KeyPadMapper.setMapping(ui->Keypad_Num4, 4);
KeyPadMapper.setMapping(ui->Keypad_Num5, 5);
KeyPadMapper.setMapping(ui->Keypad_Num6, 6);
KeyPadMapper.setMapping(ui->Keypad_Num7, 7);
KeyPadMapper.setMapping(ui->Keypad_Num8, 8);
KeyPadMapper.setMapping(ui->Keypad_Num9, 9);
KeyPadMapper.setMapping(ui->Keypad_Dot, 100);

connect(&KeyPadMapper, SIGNAL(mapped(int)), this, SLOT(SetKeypadData(int)));

                    with

                    connect(ui->Keypad_Num0, QPusButton::clicked, this, [=]{SetKeypadData(0);});
connect(ui->Keypad_Num1, QPusButton::clicked, this, [=]{SetKeypadData(1);});
connect(ui->Keypad_Num2, QPusButton::clicked, this, [=]{SetKeypadData(2);});
connect(ui->Keypad_Num3, QPusButton::clicked, this, [=]{SetKeypadData(3);});
connect(ui->Keypad_Num4, QPusButton::clicked, this, [=]{SetKeypadData(4);});
connect(ui->Keypad_Num5, QPusButton::clicked, this, [=]{SetKeypadData(5);});
connect(ui->Keypad_Num6, QPusButton::clicked, this, [=]{SetKeypadData(6);});
connect(ui->Keypad_Num7, QPusButton::clicked, this, [=]{SetKeypadData(7);});
connect(ui->Keypad_Num8, QPusButton::clicked, this, [=]{SetKeypadData(8);});
connect(ui->Keypad_Num9, QPusButton::clicked, this, [=]{SetKeypadData(9);});
connect(ui->Keypad_Dot,  QPusButton::clicked, this, [=]{SetKeypadData(100);});
                    S Offline
                    S Offline
                    sootoo23
                    wrote on last edited by
                    #27

                    @J.Hilk said in Text is not updated in qwidget.:

                    @sootoo23 Maybe you're doing the mapping wrong? I don't use it often, once in years I believe. So I'm not sure.
                    Since I'm assuming your running Qt 5.X try it with lambdas
                    replace

                    mapping is not wrong.
                    The function connected is called well and the output from the function is coming out well.

                    J.HilkJ 1 Reply Last reply
                    0
                    • S sootoo23

                      @J.Hilk said in Text is not updated in qwidget.:

                      @sootoo23 Maybe you're doing the mapping wrong? I don't use it often, once in years I believe. So I'm not sure.
                      Since I'm assuming your running Qt 5.X try it with lambdas
                      replace

                      mapping is not wrong.
                      The function connected is called well and the output from the function is coming out well.

                      J.HilkJ Offline
                      J.HilkJ Offline
                      J.Hilk
                      Moderators
                      wrote on last edited by
                      #28

                      @sootoo23 you're going through a loot of loops to create your QString,
                      are you sure that QString(keypadBuf) returns a valid QString? and not an empty one for example?

                      as a side not this one, for example could be reduced

                      {		
   if(val == 100) //dot.
   	sprintf((char *)keypadBuf, "%s%s", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),".");
   else
   	sprintf((char *)keypadBuf, "%s%d", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),val);
}
SetValue = QString(keypadBuf);
LB_SetVal->setText(SetValue);

//to
QString str = LB_SetVal->text() + val == 100 ? "." : QString::number(val);

LB_SetVal->setText(str);

                      Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct

                      Q: What's that?
                      A: It's blue light.
                      Q: What does it do?
                      A: It turns blue.

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                      • J.HilkJ J.Hilk

                        @sootoo23 you're going through a loot of loops to create your QString,
                        are you sure that QString(keypadBuf) returns a valid QString? and not an empty one for example?

                        as a side not this one, for example could be reduced

                        {		
   if(val == 100) //dot.
   	sprintf((char *)keypadBuf, "%s%s", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),".");
   else
   	sprintf((char *)keypadBuf, "%s%d", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),val);
}
SetValue = QString(keypadBuf);
LB_SetVal->setText(SetValue);

//to
QString str = LB_SetVal->text() + val == 100 ? "." : QString::number(val);

LB_SetVal->setText(str);
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                        S Offline
                        sootoo23
                        wrote on last edited by
                        #29

                        @J.Hilk
                        The value is always good.
                        The problem is that settext can not be updated even if you put any value.

                        J.HilkJ 1 Reply Last reply
                        0
                        • S sootoo23

                          @J.Hilk
                          The value is always good.
                          The problem is that settext can not be updated even if you put any value.

                          J.HilkJ Offline
                          J.HilkJ Offline
                          J.Hilk
                          Moderators
                          wrote on last edited by
                          #30

                          @sootoo23 said in Text is not updated in qwidget.:

                          @J.Hilk
                          The value is always good.
                          The problem is that settext can not be updated even if you put any value.

                          I'm sorry, but the problem is with 99.9% certainty not the setText function I would say 1 of 4 things is the case:

                          • LB_SetVal is invalid or wrong. Doubtful because you say you calculate the correct value
                          • SetValue = QString(keypadBuf); returns an invalid or incorrect string. You can test this by setting a breakpoint and debuging, or printing SetValue to the console. e.g qDebug() << SetValue;
                          • You're blocking the event loop and your ui doesnt get updated
                          • Maybe you have set bool QObject::blockSignals(bool block) to true somewhere that is messing things up

                          also, what Qt-Version and compiler is this btw?

                          Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct

                          Q: What's that?
                          A: It's blue light.
                          Q: What does it do?
                          A: It turns blue.

                          S 1 Reply Last reply
                          2
                          • J.HilkJ J.Hilk

                            @sootoo23 said in Text is not updated in qwidget.:

                            @J.Hilk
                            The value is always good.
                            The problem is that settext can not be updated even if you put any value.

                            I'm sorry, but the problem is with 99.9% certainty not the setText function I would say 1 of 4 things is the case:

                            • LB_SetVal is invalid or wrong. Doubtful because you say you calculate the correct value
                            • SetValue = QString(keypadBuf); returns an invalid or incorrect string. You can test this by setting a breakpoint and debuging, or printing SetValue to the console. e.g qDebug() << SetValue;
                            • You're blocking the event loop and your ui doesnt get updated
                            • Maybe you have set bool QObject::blockSignals(bool block) to true somewhere that is messing things up

                            also, what Qt-Version and compiler is this btw?

                            S Offline
                            S Offline
                            sootoo23
                            wrote on last edited by
                            #31

                            @J.Hilk

                            I found something strange.
                             After changing the data to "Settext", execute hide () on the QWidget and show () again.
                             I confirmed that it was updated.

                            1. LB_SetVal is always good.
                              -> printf("LB_SetVal: %s, KeypadBuf: %s \n", QByteArray(LB_SetVal->text().toLocal8Bit()).data(),keypadBuf);
                            2. I removed all blockSignals.
                              -> The QWidget in problem has no Timer and no BlockSignal.
                            1 Reply Last reply
                            0

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