From 959b33c59be63bbe50906095233dea227bade32c Mon Sep 17 00:00:00 2001
From: jean-pierre charras <jp.charras@wanadoo.fr>
Date: Fri, 14 May 2021 15:30:38 +0200
Subject: [PATCH] Footprint editor: fix incorrect "Zoom to Fit" when the F.Cu
 layer is not shown. Fixes #8420

---
 pcbnew/pcb_draw_panel_gal.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/pcbnew/pcb_draw_panel_gal.cpp b/pcbnew/pcb_draw_panel_gal.cpp
index f3e4263cd5..4cd0486aca 100644
--- a/pcbnew/pcb_draw_panel_gal.cpp
+++ b/pcbnew/pcb_draw_panel_gal.cpp
@@ -37,6 +37,7 @@
 #include <class_track.h>
 #include <class_marker_pcb.h>
 #include <pcb_base_frame.h>
+#include "footprint_edit_frame.h"
 #include <confirm.h>
 
 #include <gal/graphics_abstraction_layer.h>
@@ -439,6 +440,21 @@ BOX2I PCB_DRAW_PANEL_GAL::GetDefaultViewBBox() const
     if( m_worksheet && m_view->IsLayerVisible( LAYER_WORKSHEET ) )
         return m_worksheet->ViewBBox();
 
+    // The footprint editor frame has no worksheet, but the best default view box is the
+    // view box able to show the current footprint
+    FOOTPRINT_EDIT_FRAME* fp_frame;
+
+    if( ( fp_frame = dynamic_cast<FOOTPRINT_EDIT_FRAME*>( m_edaFrame ) ) )
+    {
+        MODULE* footprint = fp_frame->GetBoard()->m_Modules;
+
+        if( footprint )
+        {
+            EDA_RECT bbox = footprint->GetBoundingBox();
+            return bbox;
+        }
+    }
+
     return BOX2I();
 }