From 0b6cbf825ac3c67e5c62de1e8c2d5fad6f2de460 Mon Sep 17 00:00:00 2001
From: Tanner Collin <git@tannercollin.com>
Date: Mon, 9 Feb 2026 17:26:51 -0700
Subject: [PATCH] feat: Add feature browser dock widget with document
 synchronization

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>
---
 src/Document.cpp   |  2 ++
 src/Document.h     |  4 ++++
 src/MainWindow.cpp | 34 +++++++++++++++++++++++++++++++++-
 src/MainWindow.h   |  9 +++++++++
 4 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/src/Document.cpp b/src/Document.cpp
index cfac37b..cf1243d 100644
--- a/src/Document.cpp
+++ b/src/Document.cpp
@@ -19,12 +19,14 @@ Document::~Document()
 void Document::addFeature(Feature* feature)
 {
     m_features.append(feature);
+    emit featureAdded(feature);
 }
 
 void Document::clear()
 {
     qDeleteAll(m_features);
     m_features.clear();
+    emit cleared();
 }
 
 bool Document::save(const QString& path) const
diff --git a/src/Document.h b/src/Document.h
index 2c2a023..5a7fc72 100644
--- a/src/Document.h
+++ b/src/Document.h
@@ -19,6 +19,10 @@ public:
     bool save(const QString& path) const;
     bool load(const QString& path);
 
+signals:
+    void featureAdded(Feature* feature);
+    void cleared();
+
 private:
     QList<Feature*> m_features;
 };
diff --git a/src/MainWindow.cpp b/src/MainWindow.cpp
index 4756636..cd79bb8 100644
--- a/src/MainWindow.cpp
+++ b/src/MainWindow.cpp
@@ -2,11 +2,15 @@
 #include "ViewportWidget.h"
 #include "Document.h"
 #include "SketchFeature.h"
+#include "Feature.h"
 
 #include <QMenuBar>
 #include <QMenu>
 #include <QFileDialog>
 #include <QMessageBox>
+#include <QDockWidget>
+#include <QTreeWidget>
+#include <QTreeWidgetItem>
 #include <QToolBar>
 #include <QTabWidget>
 #include <QWidget>
@@ -80,6 +84,18 @@ MainWindow::MainWindow(QWidget *parent)
     setCentralWidget(m_viewport);
 
     m_document = new Document(this);
+    connect(m_document, &Document::featureAdded, this, &MainWindow::onFeatureAdded);
+    connect(m_document, &Document::cleared, this, &MainWindow::onDocumentCleared);
+
+    QDockWidget *dock = new QDockWidget("Browser", this);
+    addDockWidget(Qt::LeftDockWidgetArea, dock);
+
+    m_featureTree = new QTreeWidget(dock);
+    m_featureTree->setHeaderHidden(true);
+    dock->setWidget(m_featureTree);
+
+    m_rootItem = new QTreeWidgetItem(m_featureTree);
+
     setCurrentFile(QString());
 }
 
@@ -161,6 +177,22 @@ void MainWindow::setCurrentFile(const QString &fileName)
 
     QString shownName = m_currentFile;
     if (m_currentFile.isEmpty())
-        shownName = "untitled.json";
+        shownName = "Untitled";
     setWindowTitle(tr("%1[*] - %2").arg(QFileInfo(shownName).fileName(), tr("OpenCAD")));
+
+    if (m_rootItem) {
+        m_rootItem->setText(0, QFileInfo(shownName).fileName());
+    }
+}
+
+void MainWindow::onFeatureAdded(Feature* feature)
+{
+    QTreeWidgetItem *item = new QTreeWidgetItem(m_rootItem);
+    item->setText(0, feature->name());
+    m_rootItem->setExpanded(true);
+}
+
+void MainWindow::onDocumentCleared()
+{
+    qDeleteAll(m_rootItem->takeChildren());
 }
diff --git a/src/MainWindow.h b/src/MainWindow.h
index 897f8fa..ef0997e 100644
--- a/src/MainWindow.h
+++ b/src/MainWindow.h
@@ -5,6 +5,9 @@
 
 class ViewportWidget;
 class Document;
+class Feature;
+class QTreeWidget;
+class QTreeWidgetItem;
 
 class MainWindow : public QMainWindow
 {
@@ -20,12 +23,18 @@ private slots:
     bool saveAs();
     void createSketch();
 
+    void onFeatureAdded(Feature* feature);
+    void onDocumentCleared();
+
 private:
     void setCurrentFile(const QString &fileName);
 
     ViewportWidget *m_viewport;
     Document *m_document;
     QString m_currentFile;
+
+    QTreeWidget* m_featureTree;
+    QTreeWidgetItem* m_rootItem;
 };
 
 #endif // MAINWINDOW_H