First working counter

src/counter.cpp

@@ -1,18 +1,34 @@
 #include "counter.h"
+#include <climits>
 
 Counter::Counter(QObject *parent)
-    : QObject(parent)
+    : QObject{parent}
+    , m_value{0}
 {
   // Nothing
 }
 
-uint Counter::counter() const
+quint32 Counter::value() const
 {
-  return m_counter;
+    return m_value;
 }
 
-void Counter::setCounter(const uint counter)
+void Counter::setValue(const quint32 value)
 {
-  m_counter = counter;
-  Q_EMIT counterChanged();
+    m_value = value;
+    Q_EMIT valueChanged();
+}
+
+void Counter::increment() {
+    if (m_value == UINT_MAX) return;
+
+    m_value += 1;
+    Q_EMIT valueChanged();
+}
+
+void Counter::decrement() {
+    if (m_value == 0) return;
+
+    m_value -= 1;
+    Q_EMIT valueChanged();
 }

src/counter.h

@@ -5,18 +5,22 @@
 #include <qtmetamacros.h>
 
 class Counter: public QObject {
-  Q_OBJECT
-  Q_PROPERTY(uint counter READ counter WRITE setCounter NOTIFY counterChanged)
-  QML_ELEMENT
-public:
-  explicit Counter(QObject *parent = nullptr);
+    Q_OBJECT
+    Q_PROPERTY(uint value READ value WRITE setValue NOTIFY valueChanged)
+    QML_ELEMENT
 
-  [[nodiscard]] uint counter() const;
-  void setCounter(const uint counter);
+public:
+    explicit Counter(QObject *parent = nullptr);
+
+    [[nodiscard]] quint32 value() const;
+    void setValue(const quint32 value);
+
+    Q_INVOKABLE void increment();
+    Q_INVOKABLE void decrement();
 
 Q_SIGNALS:
-  void counterChanged();
+    void valueChanged();
 
 private:
-  uint m_counter;
+    quint32 m_value;
 };

src/qml/Main.qml

@@ -2,6 +2,7 @@ import QtQuick
 import QtQuick.Controls as Controls
 import QtQuick.Layouts
 import org.kde.kirigami as Kirigami
+import fr.mrdev023.tutorial_kirigami2
 
 Kirigami.ApplicationWindow {
     id: root
@@ -23,9 +24,26 @@ Kirigami.ApplicationWindow {
     pageStack.initialPage: Kirigami.ScrollablePage {
         title: i18nc("@title", "Main Page")
 
-        actions: [
-        ]
+        Kirigami.FlexColumn {
+            anchors.fill: parent
 
-        Item {}
+            Controls.Label {
+                text: counter.value
+            }
+
+            Controls.Button {
+                text: i18n("-")
+                onClicked: counter.decrement()
+            }
+
+            Controls.Button {
+                text: i18n("+")
+                onClicked: counter.increment()
+            }
+        }
+    }
+
+    Counter {
+        id: counter
     }
 }