qml demo

CMakeLists.txt

@@ -5,14 +5,44 @@ project(sonobulus LANGUAGES CXX)
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-# add_library(sonobulus_core STATIC
-#     # empty
-# )
+find_package(Qt6 REQUIRED COMPONENTS
+    Core
+    Quick  
+)
 
-add_executable(sonobulus
+qt_standard_project_setup()
+
+add_library(sonobulus_core STATIC
+    src/TimerComponent.cpp
+)
+target_link_libraries(sonobulus_core PRIVATE
+    Qt6::Core
+    Qt6::Quick
+)
+
+qt_add_executable(sonobulus
     src/main.cpp
 )
 
-# target_link_libraries(sonobulus
-#     sonobulus_core
-# )
+qt_add_qml_module(sonobulus
+    URI sonobulus
+    VERSION 1.0
+    QML_FILES src/Main.qml
+)
+
+target_link_libraries(sonobulus PRIVATE
+    sonobulus_core
+    Qt6::Core
+    Qt6::Quick
+)
+
+install(TARGETS sonobulus)
+
+if (WIN32)
+    add_custom_command(
+        TARGET sonobulus POST_BUILD
+        COMMAND powershell -c "${Qt6_DIR}/../../../bin/windeployqt6.exe --qmldir . $<TARGET_FILE:sonobulus>"
+        COMMENT "windeployqt..."
+        VERBATIM
+    )
+endif()

README.md

@@ -37,7 +37,8 @@ to produce somewhat well-sounding instruments and music performance.
 
 Prerequisites:
 CMake: https://cmake.org/download/ \
-QtWidgets: https://www.qt.io/development/download-qt-installer-oss
+Qt6::QML: https://www.qt.io/development/download-qt-installer-oss \
+Note: you must export the Qt install location to your environment. E.g. add the following to a powershell profile: `$env:Qt6_DIR = "C:\Qt\6.10.1\msvc2022_64"`
 
 Compiler that supports C++20. Builds have been tested with GCC12 & MSVC17
 

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();
 }