Try with KIPLATFORM

eeschema/dialogs/dialog_symbol_fields_table.cpp

@@ -37,6 +37,7 @@
 #include <sch_reference_list.h>
 #include <schematic.h>
 #include <tools/sch_editor_control.h>
+#include <kiplatform/ui.h>
 #include <widgets/grid_text_button_helpers.h>
 #include <widgets/wx_grid.h>
 #include <wx/grid.h>
@@ -1170,14 +1171,8 @@ void DIALOG_SYMBOL_FIELDS_TABLE::OnTableItemContextMenu( wxGridEvent& event )
 
 void DIALOG_SYMBOL_FIELDS_TABLE::OnSizeFieldList( wxSizeEvent& event )
 {
-    // GetClientSize subtracts scrollbars width on Windows.
-    // On other platforms, the visible area must be computed manually.
-#ifdef __WINDOWS__
-    int nameColWidth = m_fieldsCtrl->GetClientSize().x - m_showColWidth - m_groupByColWidth;
-#else
-    int nameColWidth = event.GetSize().GetX() - m_showColWidth - m_groupByColWidth
-                       - wxSystemSettings::GetMetric( wxSYS_VSCROLL_X );
-#endif
+    int nameColWidth = KIPLATFORM::UI::GetUnobscuredSize( m_fieldsCtrl ).x - m_showColWidth
+                       - m_groupByColWidth;
 
     // GTK loses its head and messes these up when resizing the splitter bar:
     m_fieldsCtrl->GetColumn( SHOW_FIELD_COLUMN )->SetWidth( m_showColWidth );

libs/kiplatform/gtk/ui.cpp

@@ -120,3 +120,10 @@ double KIPLATFORM::UI::GetSystemScaleFactor( const wxWindow* aWindow )
 
     return val;
 }
+
+
+wxSize KIPLATFORM::UI::GetUnobscuredSize( const wxWindow* aWindow )
+{
+    return wxSize( aWindow->GetSize().GetX() - wxSystemSettings::GetMetric( wxSYS_VSCROLL_X ),
+                   aWindow->GetSize().GetY() - wxSystemSettings::GetMetric( wxSYS_HSCROLL_Y ) );
+}

libs/kiplatform/include/kiplatform/ui.h

@@ -101,6 +101,14 @@ namespace KIPLATFORM
          * @return System scale factor in use, defaulting to the wxWidgets method
          */
         double GetSystemScaleFactor( const wxWindow* aWindow );
+
+        /**
+         * Tries to determine the size of the viewport of a scrollable widget (wxDataViewCtrl, wxGrid) 
+         * that won't be obscured by scrollbars.
+         * @param aWindow pointer to the scrollable widget to check
+         * @return Viewport size that won't be obscured by scrollbars
+         */
+        wxSize GetUnobscuredSize( const wxWindow* aWindow );
     }
 }
 

libs/kiplatform/msw/ui.cpp

@@ -120,3 +120,9 @@ double KIPLATFORM::UI::GetSystemScaleFactor( const wxWindow* aWindow )
 {
     return aWindow->GetContentScaleFactor();
 }
+
+
+wxSize KIPLATFORM::UI::GetUnobscuredSize( const wxWindow* aWindow )
+{
+    return aWindow->GetClientSize();
+}

libs/kiplatform/osx/ui.mm

@@ -119,3 +119,10 @@ double KIPLATFORM::UI::GetSystemScaleFactor( const wxWindow* aWindow )
 {
     return aWindow->GetContentScaleFactor();
 }
+
+
+wxSize KIPLATFORM::UI::GetUnobscuredSize( const wxWindow* aWindow )
+{
+    return wxSize( aWindow->GetSize().GetX() - wxSystemSettings::GetMetric( wxSYS_VSCROLL_X ),
+                   aWindow->GetSize().GetY() - wxSystemSettings::GetMetric( wxSYS_HSCROLL_Y ) );
+}