feat: Add sketch mode UI tab with drawing tools

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

icons/circle.svg

@@ -0,0 +1,3 @@
+<svg version="1.1" viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg">
+ <circle cx="24" cy="24" r="16" fill="none" stroke="#000" stroke-width="4"/>
+</svg>

icons/line.svg

@@ -0,0 +1,3 @@
+<svg version="1.1" viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg">
+ <path d="m 8,40 32,-32" fill="none" stroke="#000" stroke-width="4"/>
+</svg>

icons/rectangle.svg

@@ -0,0 +1,3 @@
+<svg version="1.1" viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg">
+ <rect x="8" y="12" width="32" height="24" fill="none" stroke="#000" stroke-width="4"/>
+</svg>

icons/save-sketch.svg

@@ -0,0 +1,3 @@
+<svg version="1.1" viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg">
+ <path d="m8 24 12 12 20-24" fill="none" stroke="#000" stroke-width="4"/>
+</svg>

src/MainWindow.cpp

@@ -42,12 +42,12 @@ MainWindow::MainWindow(QWidget *parent)
     mainToolBar->setFloatable(false);
     mainToolBar->setStyleSheet("QToolBar { border: 0px }");
 
-    QTabWidget *tabWidget = new QTabWidget();
+    m_tabWidget = new QTabWidget();
-    mainToolBar->addWidget(tabWidget);
+    mainToolBar->addWidget(m_tabWidget);
 
     // --- SOLID Tab ---
-    QWidget *solidTab = new QWidget();
+    m_solidTab = new QWidget();
-    QHBoxLayout *solidLayout = new QHBoxLayout(solidTab);
+    QHBoxLayout *solidLayout = new QHBoxLayout(m_solidTab);
     solidLayout->setContentsMargins(5, 5, 5, 5);
     solidLayout->setSpacing(5);
     solidLayout->setAlignment(Qt::AlignLeft);
@@ -67,15 +67,55 @@ MainWindow::MainWindow(QWidget *parent)
     extrudeButton->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
     solidLayout->addWidget(extrudeButton);
 
-    tabWidget->addTab(solidTab, "SOLID");
+    m_tabWidget->addTab(m_solidTab, "SOLID");
 
     // --- SURFACE Tab ---
-    QWidget *surfaceTab = new QWidget();
+    m_surfaceTab = new QWidget();
-    tabWidget->addTab(surfaceTab, "SURFACE");
+    m_tabWidget->addTab(m_surfaceTab, "SURFACE");
 
     // --- TOOLS Tab ---
-    QWidget *toolsTab = new QWidget();
+    m_toolsTab = new QWidget();
-    tabWidget->addTab(toolsTab, "TOOLS");
+    m_tabWidget->addTab(m_toolsTab, "TOOLS");
+
+    // --- SKETCH Tab ---
+    m_sketchTab = new QWidget();
+    QHBoxLayout *sketchLayout = new QHBoxLayout(m_sketchTab);
+    sketchLayout->setContentsMargins(5, 5, 5, 5);
+    sketchLayout->setSpacing(5);
+    sketchLayout->setAlignment(Qt::AlignLeft);
+
+    QToolButton *lineButton = new QToolButton();
+    lineButton->setText("Line");
+    lineButton->setIcon(QIcon(":/icons/line.svg"));
+    lineButton->setIconSize(QSize(48, 48));
+    lineButton->setToolButtonStyle(Qt::ToolButtonIconOnly);
+    lineButton->setFixedSize(56, 56);
+    sketchLayout->addWidget(lineButton);
+
+    QToolButton *rectangleButton = new QToolButton();
+    rectangleButton->setText("Rectangle");
+    rectangleButton->setIcon(QIcon(":/icons/rectangle.svg"));
+    rectangleButton->setIconSize(QSize(48, 48));
+    rectangleButton->setToolButtonStyle(Qt::ToolButtonIconOnly);
+    rectangleButton->setFixedSize(56, 56);
+    sketchLayout->addWidget(rectangleButton);
+
+    QToolButton *circleButton = new QToolButton();
+    circleButton->setText("Circle");
+    circleButton->setIcon(QIcon(":/icons/circle.svg"));
+    circleButton->setIconSize(QSize(48, 48));
+    circleButton->setToolButtonStyle(Qt::ToolButtonIconOnly);
+    circleButton->setFixedSize(56, 56);
+    sketchLayout->addWidget(circleButton);
+
+    QToolButton *saveSketchButton = new QToolButton();
+    saveSketchButton->setText("Save Sketch");
+    saveSketchButton->setIcon(QIcon(":/icons/save-sketch.svg"));
+    saveSketchButton->setIconSize(QSize(48, 48));
+    saveSketchButton->setToolButtonStyle(Qt::ToolButtonIconOnly);
+    saveSketchButton->setFixedSize(56, 56);
+    connect(saveSketchButton, &QToolButton::clicked, this, &MainWindow::saveSketch);
+    sketchLayout->addWidget(saveSketchButton);
 
     m_viewport = new ViewportWidget;
     setCentralWidget(m_viewport);
@@ -109,9 +149,22 @@ void MainWindow::createSketch()
             feature->setPlane(SketchFeature::SketchPlane::YZ);
         }
         m_document->addFeature(feature);
+
+        m_tabWidget->removeTab(m_tabWidget->indexOf(m_toolsTab));
+        m_tabWidget->removeTab(m_tabWidget->indexOf(m_surfaceTab));
+        m_tabWidget->removeTab(m_tabWidget->indexOf(m_solidTab));
+        m_tabWidget->addTab(m_sketchTab, "SKETCH");
     }
 }
 
+void MainWindow::saveSketch()
+{
+    m_tabWidget->removeTab(m_tabWidget->indexOf(m_sketchTab));
+    m_tabWidget->addTab(m_solidTab, "SOLID");
+    m_tabWidget->addTab(m_surfaceTab, "SURFACE");
+    m_tabWidget->addTab(m_toolsTab, "TOOLS");
+}
+
 void MainWindow::newFile()
 {
     m_document->clear();

src/MainWindow.h

@@ -6,6 +6,8 @@
 class ViewportWidget;
 class Document;
 class Feature;
+class QTabWidget;
+class QWidget;
 
 class MainWindow : public QMainWindow
 {
@@ -20,6 +22,7 @@ private slots:
     bool save();
     bool saveAs();
     void createSketch();
+    void saveSketch();
 
 private:
     void setCurrentFile(const QString &fileName);
@@ -27,6 +30,12 @@ private:
     ViewportWidget *m_viewport;
     Document *m_document;
     QString m_currentFile;
+
+    QTabWidget *m_tabWidget;
+    QWidget *m_solidTab;
+    QWidget *m_surfaceTab;
+    QWidget *m_toolsTab;
+    QWidget *m_sketchTab;
 };
 
 #endif // MAINWINDOW_H