From 64ebd79b4a5df495481facedd2a18a0e7216cf28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ferenc=20G=C3=A9czi?= <ferenc.gm@gmail.com>
Date: Sat, 23 Nov 2024 00:00:00 +0000
Subject: [PATCH] [qt][linux] Handle touchpad rotation gesture
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Ferenc Géczi <ferenc.gm@gmail.com>
---
 qt/draw_widget.cpp          | 12 ++++++++++++
 qt/draw_widget.hpp          |  3 +++
 qt/qt_common/map_widget.hpp |  2 +-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/qt/draw_widget.cpp b/qt/draw_widget.cpp
index 98f23dc2dd..239d8c1a81 100644
--- a/qt/draw_widget.cpp
+++ b/qt/draw_widget.cpp
@@ -253,6 +253,12 @@ bool DrawWidget::event(QEvent * event)
       m_framework.Scale(exp(factor), m2::PointD(L2D(pos.x()), L2D(pos.y())), false);
       return true;
     }
+    if (qNativeGestureEvent->gestureType() == Qt::RotateNativeGesture)
+    {
+      m_currentRotation += qNativeGestureEvent->value();
+      m_framework.Rotate(m_currentRotation, false);
+      return true;
+    }
   }
   // Everything else
   return QOpenGLWidget::event(event);
@@ -775,6 +781,12 @@ void DrawWidget::SetRuler(bool enabled)
   m_ruler.SetActive(enabled);
 }
 
+void DrawWidget::OnViewportChanged(ScreenBase const & screen)
+{
+  MapWidget::OnViewportChanged(screen);
+  m_currentRotation = static_cast<qreal>(screen.GetAngle());
+}
+
 // static
 void DrawWidget::RefreshDrawingRules()
 {
diff --git a/qt/draw_widget.hpp b/qt/draw_widget.hpp
index 335611cd4c..9382c832d6 100644
--- a/qt/draw_widget.hpp
+++ b/qt/draw_widget.hpp
@@ -87,6 +87,8 @@ protected:
   void keyPressEvent(QKeyEvent * e) override;
   void keyReleaseEvent(QKeyEvent * e) override;
 
+  void OnViewportChanged(ScreenBase const & screen) override;
+
 private:
   void SubmitFakeLocationPoint(m2::PointD const & pt);
   void SubmitRulerPoint(m2::PointD const & pt);
@@ -124,5 +126,6 @@ private:
   std::unique_ptr<Screenshoter> m_screenshoter;
   Ruler m_ruler;
   RoutingTurnsVisualizer m_turnsVisualizer;
+  qreal m_currentRotation = 0.0;
 };
 }  // namespace qt
diff --git a/qt/qt_common/map_widget.hpp b/qt/qt_common/map_widget.hpp
index 304a51aea0..5149fe4523 100644
--- a/qt/qt_common/map_widget.hpp
+++ b/qt/qt_common/map_widget.hpp
@@ -82,7 +82,7 @@ protected:
   void Build();
   void ShowInfoPopup(QMouseEvent * e, m2::PointD const & pt);
 
-  void OnViewportChanged(ScreenBase const & screen);
+  virtual void OnViewportChanged(ScreenBase const & screen);
 
   // QOpenGLWidget overrides:
   void initializeGL() override;
-- 
2.45.3