Cancel drag action when focus is lost

common/draw_panel_gal.cpp

@@ -545,6 +545,8 @@ void EDA_DRAW_PANEL_GAL::onLostFocus( wxFocusEvent& aEvent )
 {
     m_lostFocus = true;
 
+    m_viewControls->CancelDrag();
+
     aEvent.Skip();
 }
 

common/view/wx_view_controls.cpp

@@ -598,6 +598,19 @@ void WX_VIEW_CONTROLS::CaptureCursor( bool aEnabled )
 }
 
 
+void WX_VIEW_CONTROLS::CancelDrag()
+{
+    if( m_state == DRAG_PANNING || m_state == DRAG_ZOOMING )
+    {
+        m_state = IDLE;
+#if defined USE_MOUSE_CAPTURE
+        if( !m_settings.m_cursorCaptured && m_parentPanel->HasCapture() )
+            m_parentPanel->ReleaseMouse();
+#endif
+    }
+}
+
+
 VECTOR2D WX_VIEW_CONTROLS::GetMousePosition( bool aWorldCoordinates ) const
 {
     wxPoint msp = getMouseScreenPosition();

include/view/wx_view_controls.h

@@ -102,6 +102,9 @@ public:
     ///< Adjusts the scrollbars position to match the current viewport.
     void UpdateScrollbars();
 
+    ///< End any mouse drag action still in progress
+    void CancelDrag();
+
     void ForceCursorPosition( bool aEnabled,
                               const VECTOR2D& aPosition = VECTOR2D( 0, 0 ) ) override;