feat: Manage active drawing tool state in controller and UI

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

src/ApplicationController.cpp

@@ -34,6 +34,21 @@ SketchFeature* ApplicationController::activeSketch() const
     return m_activeSketch;
 }
 
+ApplicationController::ToolType ApplicationController::activeTool() const
+{
+    return m_activeTool;
+}
+
+void ApplicationController::setActiveTool(ToolType tool)
+{
+    if (m_activeTool == tool) {
+        return;
+    }
+
+    m_activeTool = tool;
+    emit activeToolChanged(m_activeTool);
+}
+
 void ApplicationController::newDocument()
 {
     m_activeSketch = nullptr;
@@ -114,6 +129,7 @@ void ApplicationController::beginSketchCreation()
 void ApplicationController::endSketch()
 {
     m_activeSketch = nullptr;
+    setActiveTool(ToolType::None);
     emit sketchModeEnded();
 }
 

src/ApplicationController.h

@@ -12,14 +12,24 @@ class ApplicationController : public QObject
 {
     Q_OBJECT
 public:
+    enum ToolType {
+        None,
+        Line,
+        Rectangle,
+        Circle
+    };
+    Q_ENUM(ToolType)
+
     explicit ApplicationController(QObject *parent = nullptr);
     ~ApplicationController();
 
     void setMainWindow(MainWindow* mainWindow);
     Document* document() const;
     SketchFeature* activeSketch() const;
+    ToolType activeTool() const;
 
 public slots:
+    void setActiveTool(ToolType tool);
     void newDocument();
     bool openDocument();
     bool saveDocument();
@@ -32,6 +42,7 @@ signals:
     void sketchModeStarted(ViewportWidget::SketchPlane plane);
     void sketchModeEnded();
     void currentFileChanged(const QString& path);
+    void activeToolChanged(ToolType tool);
 
 private:
     ApplicationController(const ApplicationController&) = delete;
@@ -43,6 +54,7 @@ private:
     QString m_currentFile;
     MainWindow* m_mainWindow = nullptr;
     SketchFeature* m_activeSketch = nullptr;
+    ToolType m_activeTool = ToolType::None;
 };
 
 #endif // APPLICATIONCONTROLLER_H

src/MainWindow.cpp

@@ -91,6 +91,9 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     lineButton->setIcon(QIcon(":/icons/line.svg"));
     lineButton->setIconSize(QSize(48, 48));
     lineButton->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
+    connect(lineButton, &QToolButton::clicked, this, [this]() {
+        m_appController->setActiveTool(ApplicationController::ToolType::Line);
+    });
     sketchLayout->addWidget(lineButton);
 
     QToolButton *rectangleButton = new QToolButton();
@@ -98,6 +101,9 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     rectangleButton->setIcon(QIcon(":/icons/rectangle.svg"));
     rectangleButton->setIconSize(QSize(48, 48));
     rectangleButton->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
+    connect(rectangleButton, &QToolButton::clicked, this, [this]() {
+        m_appController->setActiveTool(ApplicationController::ToolType::Rectangle);
+    });
     sketchLayout->addWidget(rectangleButton);
 
     QToolButton *circleButton = new QToolButton();
@@ -105,6 +111,9 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     circleButton->setIcon(QIcon(":/icons/circle.svg"));
     circleButton->setIconSize(QSize(48, 48));
     circleButton->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
+    connect(circleButton, &QToolButton::clicked, this, [this]() {
+        m_appController->setActiveTool(ApplicationController::ToolType::Circle);
+    });
     sketchLayout->addWidget(circleButton);
 
     QToolButton *saveSketchButton = new QToolButton();