Start adding hello world app.

.gitignore

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+.DS_Store

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.16)
+
+project(scribbles VERSION 1.0.0 LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(Qt6 REQUIRED COMPONENTS Widgets)
+qt_standard_project_setup()
+
+add_subdirectory(src/app)

src/app/CMakeLists.txt

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+
+qt_add_executable(scribbles
+    main.cpp
+    MainWindow.cpp 
+    MainWindow.ui
+)
+
+target_link_libraries(scribbles PRIVATE Qt6::Widgets)
+
+set_target_properties(scribbles PROPERTIES
+    WIN32_EXECUTABLE ON
+    MACOSX_BUNDLE ON
+)

src/app/main.cpp

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+#include <QApplication>
+#include <QCommandLineParser>
+
+#include "MainWindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    QCoreApplication::setOrganizationName("Scribbles"_L1);
+    QCoreApplication::setApplicationName("Scribbles"_L1);
+    QCoreApplication::setApplicationVersion("0.1"_L1);
+
+    QCommandLineParser parser;
+    parser.setApplicationDescription(QApplication::translate("main",
+                                                     "A note taking and sketching app"));
+    parser.addHelpOption();
+    parser.addVersionOption();
+    parser.addPositionalArgument("File"_L1, QApplication::translate("main",
+                                                                    "A Scribbles file to open"));
+    parser.process(app);
+
+    const QStringList &positionalArguments = parser.positionalArguments();
+    const QString &fileName = (positionalArguments.count() > 0) ? positionalArguments.at(0)
+                                                                : QString();
+
+    MainWindow w;
+    w.show();
+    if (!fileName.isEmpty())
+    {
+        w.openFile(fileName);
+    }
+        
+    return app.exec();
+}