3 files changed, 10 insertions, 11 deletions
diff --git a/examples/designer/calculatorform/CMakeLists.txt b/examples/designer/calculatorform/CMakeLists.txt
index d68752b6a..27856f091 100644
--- a/examples/designer/calculatorform/CMakeLists.txt
+++ b/examples/designer/calculatorform/CMakeLists.txt
@@ -2,7 +2,9 @@ cmake_minimum_required(VERSION 3.16)
 project(calculatorform LANGUAGES CXX)
 
 set(CMAKE_AUTOMOC ON)
+#! [0]
 set(CMAKE_AUTOUIC ON)
+#! [0]
 
 if(NOT DEFINED INSTALL_EXAMPLESDIR)
     set(INSTALL_EXAMPLESDIR "examples")
@@ -12,10 +14,12 @@ set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/designer/calculatorform")
 
 find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
 
+#! [1]
 qt_add_executable(calculatorform
     calculatorform.cpp calculatorform.h calculatorform.ui
     main.cpp
 )
+#! [1]
 
 set_target_properties(calculatorform PROPERTIES
     WIN32_EXECUTABLE TRUE
diff --git a/examples/designer/calculatorform/calculatorform.cpp b/examples/designer/calculatorform/calculatorform.cpp
index 8d5fc88d3..24ce24a61 100644
--- a/examples/designer/calculatorform/calculatorform.cpp
+++ b/examples/designer/calculatorform/calculatorform.cpp
@@ -8,19 +8,15 @@ CalculatorForm::CalculatorForm(QWidget *parent)
     : QWidget(parent)
 {
     ui.setupUi(this);
+    connect(ui.inputSpinBox1, &QSpinBox::valueChanged, this, &CalculatorForm::updateResult);
+    connect(ui.inputSpinBox2, &QSpinBox::valueChanged, this, &CalculatorForm::updateResult);
 }
 //! [0]
 
 //! [1]
-void CalculatorForm::on_inputSpinBox1_valueChanged(int value)
+void CalculatorForm::updateResult()
 {
-    ui.outputWidget->setText(QString::number(value + ui.inputSpinBox2->value()));
+    const int sum = ui.inputSpinBox1->value() + ui.inputSpinBox2->value();
+    ui.outputWidget->setText(QString::number(sum));
 }
 //! [1]
-
-//! [2]
-void CalculatorForm::on_inputSpinBox2_valueChanged(int value)
-{
-    ui.outputWidget->setText(QString::number(value + ui.inputSpinBox1->value()));
-}
-//! [2]
diff --git a/examples/designer/calculatorform/calculatorform.h b/examples/designer/calculatorform/calculatorform.h
index bb301ceaa..9224ba027 100644
--- a/examples/designer/calculatorform/calculatorform.h
+++ b/examples/designer/calculatorform/calculatorform.h
@@ -17,8 +17,7 @@ public:
     explicit CalculatorForm(QWidget *parent = nullptr);
 
 private slots:
-    void on_inputSpinBox1_valueChanged(int value);
-    void on_inputSpinBox2_valueChanged(int value);
+    void updateResult();
 
 private:
     Ui::CalculatorForm ui;