initial setup

CMakeLists.txt

@@ -0,0 +1,72 @@
+cmake_minimum_required(VERSION 3.21.1)
+
+project(megpie
+    VERSION 1.0
+    LANGUAGES CXX
+)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(Qt6 6.6 REQUIRED COMPONENTS Core Gui Qml Quick QuickControls2 QuickLayouts)
+
+qt_standard_project_setup()
+
+qt_policy(SET QTP0001 NEW)
+
+if(NOT EMSCRIPTEN AND CMAKE_TOOLCHAIN_FILE MATCHES ".*Emscripten\.cmake$")
+    set(EMSCRIPTEN TRUE)
+endif()
+
+qt_add_executable(megpie
+    root.cpp
+)
+
+if (NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Debug)
+endif ()
+message("Build type: ${CMAKE_BUILD_TYPE}")
+
+if (EMSCRIPTEN)
+    if (CMAKE_BUILD_TYPE STREQUAL Debug)
+        set(CMAKE_CXX_FLAGS "-gsource-map")
+    else()
+        target_compile_options(megpie PRIVATE -Oz -g0)
+        target_link_options(megpie PRIVATE -0z -g0 --closure 1)
+    endif()
+    message("building for emscripten")
+    target_sources(megpie PRIVATE main_web.cpp)
+else()
+    if (CMAKE_BUILD_TYPE STREQUAL Debug)
+    else()
+        target_compile_options(megpie PRIVATE -O3)
+    endif()
+    message("building for desktop")
+    target_sources(megpie PRIVATE main.cpp)
+endif()
+
+if (CMAKE_BUILD_TYPE STREQUAL Debug)
+else()
+    target_compile_options(megpie PRIVATE -flto)
+    target_link_options(megpie PRIVATE -flto)
+endif()
+
+add_subdirectory(qml)
+
+target_link_libraries(megpie PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Qml
+    Qt6::Quick
+    Qt6::QuickControls2
+    Qt6::QuickLayouts
+)
+
+include(GNUInstallDirs)
+install(TARGETS megpie
+    BUNDLE DESTINATION .
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+)

main.cpp

@@ -0,0 +1,31 @@
+#include <QGuiApplication>
+#include <QQmlApplicationEngine>
+
+#include "root.h"
+
+int main(int argc, char *argv[]) {
+    Root app(argc, argv);
+
+    std::cout << "Starting" << std::endl;
+    QQmlApplicationEngine engine;
+    const QUrl url(u"qrc:qml/main.qml"_qs);
+    QObject::connect(
+        &engine, &QQmlApplicationEngine::objectCreated, &app,
+        [&url](QObject* obj, const QUrl& objUrl) {
+            if (!obj && url == objUrl)
+                QCoreApplication::exit(-2);
+        },
+        Qt::QueuedConnection);
+
+    engine.load(url);
+    if (engine.rootObjects().isEmpty())
+        return -1;
+
+    int result;
+    try {
+        result = app.exec();
+    } catch (...) {
+    }
+
+    return result;
+}

main_web.cpp

@@ -0,0 +1,25 @@
+#include <QGuiApplication>
+#include <QQmlApplicationEngine>
+
+#include "root.h"
+
+int main(int argc, char *argv[]) {
+    Root* app = new Root(argc, argv);
+
+    std::cout << "Starting" << std::endl;
+    QQmlApplicationEngine* engine = new QQmlApplicationEngine();
+    const QUrl url(u"qrc:qml/main.qml"_qs);
+    QObject::connect(
+        engine, &QQmlApplicationEngine::objectCreated, app,
+        [url](QObject* obj, const QUrl& objUrl) {
+            if (!obj && url == objUrl)
+                QCoreApplication::exit(-2);
+        },
+        Qt::QueuedConnection);
+
+    engine->load(url);
+    if (engine->rootObjects().isEmpty())
+        return -1;
+
+    return 0;
+}

qml/CMakeLists.txt

@@ -0,0 +1,11 @@
+qt_add_qml_module(megpieQml
+    URI "qml"
+    VERSION 1.0
+    STATIC
+    RESOURCE_PREFIX /
+    NO_PLUGIN
+    QML_FILES
+        main.qml
+)
+
+target_link_libraries(megpie PRIVATE megpieQml)

qml/main.qml

@@ -0,0 +1,59 @@
+import QtQuick
+import QtQuick.Window
+import QtQuick.Controls
+import QtQuick.Layouts
+
+Window {
+    property int counter: 0
+
+    id: window
+    width: 640
+    height: 480
+    visible: true
+    title: qsTr("Hello World")
+
+    Rectangle {
+        id: page
+        anchors.fill: parent
+        anchors.centerIn: parent
+        color: increment.down ? "blue" : decrement.down ? "red" : "lightgrey"
+
+        Behavior on color {
+            ColorAnimation {
+                duration: 100
+                target: page
+                easing.type: Easing.InOutQuad
+            }
+        }
+
+        GridLayout {
+            anchors.centerIn: parent
+            columns: 2
+
+            Text {
+                Layout.columnSpan: 2
+                Layout.alignment: Qt.AlignHCenter
+                text: qsTr("Hello World")
+                font.pointSize: 24; font.bold: true
+            }
+
+            Button {
+                id: increment
+                text: "Increment"
+                onClicked: window.counter++
+            }
+
+            Button {
+                id: decrement
+                text: "Decrement"
+                onClicked: window.counter--
+            }
+
+            Text {
+                Layout.columnSpan: 2
+                Layout.alignment: Qt.AlignHCenter
+                text: "The value is " + window.counter
+            }
+        }
+    }
+}

root.cpp

@@ -0,0 +1,27 @@
+#include "root.h"
+
+Root::Root(int& argc, char* argv[]) :
+    QGuiApplication(argc, argv)
+{
+
+}
+
+Root::~Root() {
+
+}
+
+bool Root::notify(QObject* receiver, QEvent* e) {
+    try {
+        return QGuiApplication::notify(receiver, e);
+    } catch (const std::exception& e) {
+        std::cout << "Caught an exception, error message:\n" << e.what() << std::endl;
+    } catch (const int& e) {
+        std::cout << "Caught int exception: " << e << std::endl;
+    } catch (...) {
+        std::cout << "Caught an exception" << std::endl;
+    }
+
+    std::cout << "Squawk is quiting..." << std::endl;
+    exit(1);
+    return false;
+}

root.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <iostream>
+
+#include <QGuiApplication>
+
+class Root : public QGuiApplication {
+    Q_OBJECT
+public:
+    Root(int& argc, char* argv[]);
+    ~Root();
+    bool notify(QObject* receiver, QEvent* e) override;
+};