From 7b65803cb377b61062475efe20bb6b2ccb4e2f4e Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Fri, 22 Feb 2019 16:16:04 +0100
Subject: [PATCH] Fix of SPE-832

Workaround for a wxWidget bug, where the mouse down event comes
before mouse enter event after a pop-up menu is closed.
---
 src/slic3r/GUI/GLCanvas3D.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index d48b6ea61..c6d465ad2 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -4755,15 +4755,22 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
     evt.SetY(evt.GetY() * scale);
 #endif
 
+	Point pos(evt.GetX(), evt.GetY());
+
 #if ENABLE_IMGUI
-    auto imgui = wxGetApp().imgui();
+    ImGuiWrapper *imgui = wxGetApp().imgui();
     if (imgui->update_mouse_data(evt)) {
+        m_mouse.position = evt.Leaving() ? Vec2d(-1.0, -1.0) : pos.cast<double>();
         render();
         return;
     }
 #endif // ENABLE_IMGUI
 
-    Point pos(evt.GetX(), evt.GetY());
+    if (! evt.Entering() && ! evt.Leaving() && m_mouse.position.x() == -1.0) {
+        // Workaround for SPE-832: There seems to be a mouse event sent to the window before evt.Entering()
+        m_mouse.position = pos.cast<double>();
+        render();
+    }
 
     if (m_picking_enabled)
         _set_current();