From 45a00b845bb99d89a18a1d267205c1dc71f171a6 Mon Sep 17 00:00:00 2001
From: Tanner Collin <git@tannercollin.com>
Date: Wed, 18 Feb 2026 14:54:57 -0700
Subject: [PATCH] feat: Add debug window; accessible via Help menu and DEBUG
 env var

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>
---
 src/DebugWindow.cpp | 22 ++++++++++++++++++++++
 src/DebugWindow.h   | 20 ++++++++++++++++++++
 src/MainWindow.cpp  | 16 ++++++++++++++++
 src/MainWindow.h    |  4 ++++
 4 files changed, 62 insertions(+)
 create mode 100644 src/DebugWindow.cpp
 create mode 100644 src/DebugWindow.h

diff --git a/src/DebugWindow.cpp b/src/DebugWindow.cpp
new file mode 100644
index 0000000..35a962c
--- /dev/null
+++ b/src/DebugWindow.cpp
@@ -0,0 +1,22 @@
+#include "DebugWindow.h"
+
+#include <QVBoxLayout>
+#include <QTextEdit>
+
+DebugWindow::DebugWindow(QWidget *parent)
+    : QDialog(parent)
+{
+    setWindowTitle("Debug Info");
+    resize(600, 400);
+
+    QVBoxLayout* layout = new QVBoxLayout(this);
+    m_textEdit = new QTextEdit();
+    m_textEdit->setReadOnly(true);
+    m_textEdit->setText("Debug window is active.");
+    layout->addWidget(m_textEdit);
+    setLayout(layout);
+}
+
+DebugWindow::~DebugWindow()
+{
+}
diff --git a/src/DebugWindow.h b/src/DebugWindow.h
new file mode 100644
index 0000000..89a602b
--- /dev/null
+++ b/src/DebugWindow.h
@@ -0,0 +1,20 @@
+#ifndef DEBUGWINDOW_H
+#define DEBUGWINDOW_H
+
+#include <QDialog>
+
+class QTextEdit;
+
+class DebugWindow : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit DebugWindow(QWidget *parent = nullptr);
+    ~DebugWindow();
+
+private:
+    QTextEdit* m_textEdit;
+};
+
+#endif // DEBUGWINDOW_H
diff --git a/src/MainWindow.cpp b/src/MainWindow.cpp
index b835cb6..ef71b39 100644
--- a/src/MainWindow.cpp
+++ b/src/MainWindow.cpp
@@ -4,6 +4,7 @@
 #include "SketchFeature.h"
 #include "Feature.h"
 #include "ApplicationController.h"
+#include "DebugWindow.h"
 
 #include <QMenuBar>
 #include <QMenu>
@@ -19,6 +20,7 @@
 #include <QStringList>
 #include <QKeyEvent>
 #include <QApplication>
+#include <QProcessEnvironment>
 
 MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     : QMainWindow(parent)
@@ -41,6 +43,10 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     QAction *saveAsAction = fileMenu->addAction("Save &As...");
     connect(saveAsAction, &QAction::triggered, this, &MainWindow::saveAs);
 
+    QMenu *helpMenu = menuBar()->addMenu("&Help");
+    QAction *debugAction = helpMenu->addAction("&Debug");
+    connect(debugAction, &QAction::triggered, this, &MainWindow::showDebugWindow);
+
 
     QToolBar* mainToolBar = addToolBar("Main Toolbar");
     mainToolBar->setMovable(false);
@@ -151,6 +157,11 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     connect(m_viewport, &ViewportWidget::planeSelected, m_appController, &ApplicationController::onPlaneSelected);
     connect(m_viewport, &ViewportWidget::toolDeactivated, m_appController, [this]() { m_appController->setActiveTool(ApplicationController::ToolType::None); });
 
+    m_debugWindow = new DebugWindow(this);
+    if (QProcessEnvironment::systemEnvironment().value("DEBUG") == "true") {
+        showDebugWindow();
+    }
+
     updateWindowTitle(QString());
 }
 
@@ -184,6 +195,11 @@ bool MainWindow::saveAs()
     return m_appController->saveDocumentAs();
 }
 
+void MainWindow::showDebugWindow()
+{
+    m_debugWindow->show();
+}
+
 void MainWindow::enterSketchMode()
 {
     m_tabWidget->removeTab(m_tabWidget->indexOf(m_toolsTab));
diff --git a/src/MainWindow.h b/src/MainWindow.h
index a4830ed..52720d4 100644
--- a/src/MainWindow.h
+++ b/src/MainWindow.h
@@ -10,6 +10,7 @@ class Feature;
 class QTabWidget;
 class QWidget;
 class ApplicationController;
+class DebugWindow;
 
 class MainWindow : public QMainWindow
 {
@@ -26,6 +27,8 @@ private slots:
     void createSketch();
     void saveSketch();
 
+    void showDebugWindow();
+
     void enterSketchMode();
     void exitSketchMode();
     void updateWindowTitle(const QString& filePath);
@@ -36,6 +39,7 @@ protected:
 private:
     ApplicationController* m_appController;
     ViewportWidget *m_viewport;
+    DebugWindow* m_debugWindow;
 
     QTabWidget *m_tabWidget;
     QWidget *m_solidTab;