From 58a825dd91c2853aac12829a19f5ca77cfc299df Mon Sep 17 00:00:00 2001
From: Filip Sykala - NTB T15p <Filip.Sykala@prusa3d.cz>
Date: Thu, 1 Dec 2022 17:20:10 +0100
Subject: [PATCH] Fix Release ghost pressing of key backspace, del, ... Add
 debug log for imgui update key data - aka key events

---
 src/slic3r/GUI/ImGuiWrapper.cpp | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/src/slic3r/GUI/ImGuiWrapper.cpp b/src/slic3r/GUI/ImGuiWrapper.cpp
index 17709788d7..233e102a6c 100644
--- a/src/slic3r/GUI/ImGuiWrapper.cpp
+++ b/src/slic3r/GUI/ImGuiWrapper.cpp
@@ -257,20 +257,37 @@ bool ImGuiWrapper::update_key_data(wxKeyEvent &evt)
         return false;
     }
 
-    ImGuiIO& io = ImGui::GetIO();
+    auto to_string = [](wxEventType type) -> std::string {
+        if (type == wxEVT_CHAR) return "Char";
+        if (type == wxEVT_KEY_DOWN) return "KeyDown";
+        if (type == wxEVT_KEY_UP) return "KeyUp";
+        return "Other";
+    };
 
-    if (evt.GetEventType() == wxEVT_CHAR) {
+    wxEventType type = evt.GetEventType();
+    ImGuiIO& io = ImGui::GetIO();
+    BOOST_LOG_TRIVIAL(debug) << "ImGui - key event(" << to_string(type) << "):"
+                             //<< " Unicode(" << evt.GetUnicodeKey() << ")"
+                             << " KeyCode(" << evt.GetKeyCode() << ")";
+
+    if (type == wxEVT_CHAR) {
         // Char event
-        const auto key = evt.GetUnicodeKey();
+        const auto   key   = evt.GetUnicodeKey();
+        unsigned int key_u = static_cast<unsigned int>(key);
+        // Release BackSpace, Delete, ... when miss wxEVT_KEY_UP event
+        if (key_u >= 0 && key_u < IM_ARRAYSIZE(io.KeysDown) && io.KeysDown[key_u]) { 
+            io.KeysDown[key_u] = false;
+        }
+
         if (key != 0) {
             io.AddInputCharacter(key);
         }
-    } else {
+    } else if (type == wxEVT_KEY_DOWN || type == wxEVT_KEY_UP) {
         // Key up/down event
         int key = evt.GetKeyCode();
         wxCHECK_MSG(key >= 0 && key < IM_ARRAYSIZE(io.KeysDown), false, "Received invalid key code");
 
-        io.KeysDown[key] = evt.GetEventType() == wxEVT_KEY_DOWN;
+        io.KeysDown[key] = (type == wxEVT_KEY_DOWN);
         io.KeyShift = evt.ShiftDown();
         io.KeyCtrl = evt.ControlDown();
         io.KeyAlt = evt.AltDown();