qml demo

src/Main.qml

@@ -0,0 +1,33 @@
+
+import QtQuick
+import QtQuick.Controls
+
+import AppDemo
+
+ApplicationWindow {
+    visible: true
+    width: 600
+    height: 400
+    title: "sonobulus"
+
+    TimerComponent {
+        id: timerComponent
+    }
+
+    Column {
+        anchors.centerIn: parent
+        spacing: 20
+
+        Label {
+            text: timerComponent.seconds + " s"
+            font.pixelSize: 32
+            horizontalAlignment: Text.AlignHCenter
+        }
+
+        Button {
+            text: "Reset"
+            onClicked: timerComponent.reset()
+        }
+    }
+
+}

src/TimerComponent.cpp

@@ -0,0 +1,24 @@
+
+#include "TimerComponent.hpp"
+
+TimerComponent::TimerComponent(QObject* parent) : QObject(parent) {
+
+    // QTimer attach callback
+    connect(&timer_, &QTimer::timeout, this, &TimerComponent::increment);
+    timer_.start(1000);
+
+}
+
+void TimerComponent::reset() {
+
+    seconds_ = 0;
+    emit secondsChanged();
+
+}
+
+void TimerComponent::increment() {
+
+    seconds_++;
+    emit secondsChanged();
+
+}

src/TimerComponent.hpp

@@ -0,0 +1,33 @@
+
+#pragma once
+
+#include <QObject>
+#include <QTimer>
+
+class TimerComponent : public QObject {
+
+    Q_OBJECT
+    Q_PROPERTY(int seconds READ seconds NOTIFY secondsChanged)
+
+    public:
+
+    explicit TimerComponent(QObject* parent = nullptr);
+
+    int seconds() const { return seconds_; }
+
+    public slots:
+
+    void reset();
+
+    signals:
+
+    void secondsChanged();
+
+    private:
+
+    void increment();
+
+    int seconds_ = 0;
+    QTimer timer_;
+
+};

src/main.cpp

@@ -1,9 +1,31 @@
 
 #include <iostream>
 
+#include <QGuiApplication>
+#include <QQmlApplicationEngine>
+#include <QQmlContext>
+
+#include "TimerComponent.hpp"
+
 int main(int argc, char* argv[]) {
 
-    std::cout << "hi mom !" << std::endl;
+    // create application
+    QGuiApplication app(argc, argv);
+    QQmlApplicationEngine engine;
 
-    return 0;
-}
+    // attach backend gui components
+    qmlRegisterType<TimerComponent>("AppDemo", 1, 0, "TimerComponent");
+
+    // load qml
+    //engine.loadFromModule("sonobulus", "Main");
+    //engine.load(QUrl("qrc:/Main.qml"));
+    engine.load(QUrl::fromLocalFile("src/Main.qml")); // ugh
+
+    if(engine.rootObjects().isEmpty()) {
+        std::cout << "engine is empty" << std::endl;
+        return -1;
+    }
+
+    // execute app
+    return app.exec();
+}