Add Qt5 dependency and create a test window

config.h.in

@@ -0,0 +1,3 @@
+#pragma once
+
+#define APP_NAME "@APP_NAME@"

main.cpp

@@ -15,6 +15,8 @@
  * along with remarkable_tool.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "main_window.hpp"
+#include <QApplication>
 #include <iostream>
 #include <simdjson.h>
 #include <string_view>
@@ -195,9 +197,13 @@ std::vector<const NotebookInfo*> make_dele_list (const Node& tree) {
 }
 } //unnamed namespace
 
-int main() {
+int main (int argc, char* argv[]) {
 	using std::string_view;
 
+	QApplication app(argc, argv);
+	duck::MainWindow win;
+	win.show();
+
 	auto notebooks = build_notebook_infos(BASE_PATH);
 	std::vector<Node> roots = to_tree(notebooks);
 	std::vector<const NotebookInfo*> dele_list;
@@ -211,5 +217,5 @@ int main() {
 			std::cout << "/home/root/.local/share/remarkable/xochitl/" << f << '\n';
 		}
 	}
-	return 0;
+	return app.exec();
 }

main_window.cpp

@@ -0,0 +1,14 @@
+#include "main_window.hpp"
+#include "config.h"
+#include <QLabel>
+
+namespace duck {
+MainWindow::MainWindow() {
+	setWindowTitle(APP_NAME);
+	QLabel* const main_label = new QLabel("Main label thing");
+	setCentralWidget(main_label);
+	main_label->setAlignment(Qt::AlignCenter);
+}
+
+MainWindow::~MainWindow() noexcept = default;
+} //namespace duck

main_window.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <QMainWindow>
+
+namespace duck {
+class MainWindow : public QMainWindow {
+	Q_OBJECT
+public:
+	MainWindow();
+	virtual ~MainWindow() noexcept;
+};
+} //namespace duck

meson.build

@@ -8,12 +8,33 @@ project('remarkable_tool', 'cpp',
   ],
 )
 
+conf = configuration_data()
+conf.set('APP_NAME', meson.project_name())
+project_config_file = configure_file(
+	input: 'config.h.in',
+	output: 'config.h',
+	configuration: conf,
+)
+
+qt5 = import('qt5')
+qt5_dep = dependency('qt5', modules: ['Core', 'Gui', 'Widgets'])
+
+moc_files = qt5.preprocess(
+  moc_headers: 'main_window.hpp',
+  dependencies: qt5_dep
+)
+
 simdjson_dep = dependency('simdjson', version: '>=0.5.0',
   fallback: ['simdjson', 'simdjson_dep'],
 )
 
 executable(meson.project_name(),
   'main.cpp',
-  dependencies: simdjson_dep,
+  'main_window.cpp',
+  moc_files,
+  dependencies: [
+	simdjson_dep,
+	qt5_dep,
+  ],
   install: true,
 )