feat: Prevent Tab key from moving focus outside active viewport tools

src/MainWindow.cpp

@@ -17,11 +17,14 @@
 #include <QIcon>
 #include <QInputDialog>
 #include <QStringList>
+#include <QKeyEvent>
+#include <QApplication>
 
 MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     : QMainWindow(parent)
     , m_appController(appController)
 {
+    qApp->installEventFilter(this);
     setWindowTitle("OpenCAD");
     resize(1920, 1080);
 
@@ -204,3 +207,19 @@ void MainWindow::updateWindowTitle(const QString& filePath)
         shownName = "Untitled";
     setWindowTitle(tr("%1[*] - %2").arg(QFileInfo(shownName).fileName(), tr("OpenCAD")));
 }
+
+bool MainWindow::eventFilter(QObject *watched, QEvent *event)
+{
+    if (m_appController->activeTool() != ApplicationController::ToolType::None && event->type() == QEvent::KeyPress) {
+        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
+        if (keyEvent->key() == Qt::Key_Tab || keyEvent->key() == Qt::Key_Backtab) {
+            if (watched == m_viewport) {
+                return false; // Let the viewport handle its own event
+            }
+            // Forward event to viewport and consume it
+            QApplication::sendEvent(m_viewport, keyEvent);
+            return true;
+        }
+    }
+    return QMainWindow::eventFilter(watched, event);
+}

src/MainWindow.h

@@ -3,6 +3,7 @@
 
 #include <QMainWindow>
 
+class QEvent;
 class ViewportWidget;
 class Document;
 class Feature;
@@ -29,6 +30,9 @@ private slots:
     void exitSketchMode();
     void updateWindowTitle(const QString& filePath);
 
+protected:
+    bool eventFilter(QObject *watched, QEvent *event) override;
+
 private:
     ApplicationController* m_appController;
     ViewportWidget *m_viewport;

src/ViewportWidget.cpp

@@ -1054,6 +1054,14 @@ void ViewportWidget::keyPressEvent(QKeyEvent *event)
     QOpenGLWidget::keyPressEvent(event);
 }
 
+bool ViewportWidget::focusNextPrevChild(bool next)
+{
+    if (m_activeTool != static_cast<int>(ApplicationController::ToolType::None)) {
+        return false;
+    }
+    return QOpenGLWidget::focusNextPrevChild(next);
+}
+
 void ViewportWidget::onSketchModeStarted(SketchPlane plane)
 {
     m_currentPlane = plane;

src/ViewportWidget.h

@@ -58,6 +58,7 @@ protected:
     void mouseMoveEvent(QMouseEvent *event) override;
     void wheelEvent(QWheelEvent *event) override;
     void keyPressEvent(QKeyEvent *event) override;
+    bool focusNextPrevChild(bool next) override;
 
 private:
     void initShaders();