From 9d20b01c5b3a41458e7d6a17f9491765a440112b Mon Sep 17 00:00:00 2001
From: YuSanka <yusanka@gmail.com>
Date: Mon, 20 Jun 2022 15:13:59 +0200
Subject: [PATCH 1/2] Linux specific: Fix for #7531, #8055, #8408

---
 src/slic3r/GUI/GUI_ObjectLayers.cpp | 30 ++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/src/slic3r/GUI/GUI_ObjectLayers.cpp b/src/slic3r/GUI/GUI_ObjectLayers.cpp
index b7ff8e48f..2801bc6f3 100644
--- a/src/slic3r/GUI/GUI_ObjectLayers.cpp
+++ b/src/slic3r/GUI/GUI_ObjectLayers.cpp
@@ -342,18 +342,26 @@ LayerRangeEditor::LayerRangeEditor( ObjectLayers* parent,
     this->Bind(wxEVT_TEXT_ENTER, [this, edit_fn](wxEvent&)
     {
         m_enter_pressed     = true;
-        // If LayersList wasn't updated/recreated, we can call wxEVT_KILL_FOCUS.Skip()
-        if (m_type&etLayerHeight) {
-            if (!edit_fn(get_value(), true, false))
+        // Workaround! Under Linux we have to use CallAfter() to avoid crash after pressing ENTER key
+        // see #7531, #8055, #8408
+#ifdef __linux__
+        wxTheApp->CallAfter([this, edit_fn]() {
+#endif
+            // If LayersList wasn't updated/recreated, we can call wxEVT_KILL_FOCUS.Skip()
+            if (m_type & etLayerHeight) {
+                if (!edit_fn(get_value(), true, false))
+                    SetValue(m_valid_value);
+                else
+                    m_valid_value = double_to_string(get_value());
+                m_call_kill_focus = true;
+            }
+            else if (!edit_fn(get_value(), true, false)) {
                 SetValue(m_valid_value);
-            else
-                m_valid_value = double_to_string(get_value());
-            m_call_kill_focus = true;
-        }
-        else if (!edit_fn(get_value(), true, false)) {
-            SetValue(m_valid_value);
-            m_call_kill_focus = true;
-        }
+                m_call_kill_focus = true;
+            }
+#ifdef __linux__
+        });
+#endif 
     }, this->GetId());
 
     this->Bind(wxEVT_KILL_FOCUS, [this, edit_fn](wxFocusEvent& e)

From ba9993c198c652b3e0c38f3d91bc03b4fc30b0ef Mon Sep 17 00:00:00 2001
From: YuSanka <yusanka@gmail.com>
Date: Tue, 21 Jun 2022 12:54:23 +0200
Subject: [PATCH 2/2] ObjectLayers: Negative value for layer heights are
 suppressed + Set last valid value, when invalid numeric value was inputted +
 Linux specific: Fixed a crash, when alternate decimal separator was used in
 input

---
 src/slic3r/GUI/GUI_ObjectLayers.cpp | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/src/slic3r/GUI/GUI_ObjectLayers.cpp b/src/slic3r/GUI/GUI_ObjectLayers.cpp
index 2801bc6f3..0587f353f 100644
--- a/src/slic3r/GUI/GUI_ObjectLayers.cpp
+++ b/src/slic3r/GUI/GUI_ObjectLayers.cpp
@@ -427,16 +427,13 @@ coordf_t LayerRangeEditor::get_value()
     const char dec_sep = is_decimal_separator_point() ? '.' : ',';
     const char dec_sep_alt = dec_sep == '.' ? ',' : '.';
     // Replace the first incorrect separator in decimal number.
-    if (str.Replace(dec_sep_alt, dec_sep, false) != 0)
-        SetValue(str);
+    str.Replace(dec_sep_alt, dec_sep, false);
 
     if (str == ".")
         layer_height = 0.0;
-    else {
-        if (!str.ToDouble(&layer_height) || layer_height < 0.0f) {
-            show_error(m_parent, _L("Invalid numeric input."));
-            SetValue(double_to_string(layer_height));
-        }
+    else if (!str.ToDouble(&layer_height) || layer_height < 0.0f) {
+        show_error(m_parent, _L("Invalid numeric input."));
+        assert(m_valid_value.ToDouble(&layer_height));
     }
 
     return layer_height;