From 6df2657eb9502a9dbca379c1418e314a3561413b Mon Sep 17 00:00:00 2001
From: Tanner Collin <git@tannercollin.com>
Date: Mon, 9 Feb 2026 15:45:16 -0700
Subject: [PATCH] feat: Implement main window with tool banner and viewport
 placeholder

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>
---
 CMakeLists.txt     |  5 ++++-
 src/MainWindow.cpp | 17 +++++++++++++++++
 src/MainWindow.h   | 14 ++++++++++++++
 src/main.cpp       |  6 ++----
 4 files changed, 37 insertions(+), 5 deletions(-)
 create mode 100644 src/MainWindow.cpp
 create mode 100644 src/MainWindow.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3b813fe..e5b661d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,9 @@ set(CMAKE_AUTOUIC ON)
 
 find_package(Qt6 COMPONENTS Widgets REQUIRED)
 
-add_executable(OpenCAD src/main.cpp)
+add_executable(OpenCAD
+    src/main.cpp
+    src/MainWindow.cpp
+)
 
 target_link_libraries(OpenCAD PRIVATE Qt6::Widgets)
diff --git a/src/MainWindow.cpp b/src/MainWindow.cpp
new file mode 100644
index 0000000..5c78e8c
--- /dev/null
+++ b/src/MainWindow.cpp
@@ -0,0 +1,17 @@
+#include "MainWindow.h"
+
+#include <QToolBar>
+#include <QWidget>
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setWindowTitle("OpenCAD");
+    resize(800, 600);
+
+    QToolBar *toolBar = addToolBar("Tools");
+
+    QWidget *viewport = new QWidget;
+    viewport->setStyleSheet("background-color: darkgray;");
+    setCentralWidget(viewport);
+}
diff --git a/src/MainWindow.h b/src/MainWindow.h
new file mode 100644
index 0000000..180a302
--- /dev/null
+++ b/src/MainWindow.h
@@ -0,0 +1,14 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = nullptr);
+};
+
+#endif // MAINWINDOW_H
diff --git a/src/main.cpp b/src/main.cpp
index b01d137..22cf605 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,13 +1,11 @@
 #include <QApplication>
-#include <QMainWindow>
+#include "MainWindow.h"
 
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
 
-    QMainWindow window;
-    window.setWindowTitle("OpenCAD");
-    window.resize(800, 600);
+    MainWindow window;
     window.show();
 
     return app.exec();