From 0364ae49082428e821d813c80823fea99122a3fe Mon Sep 17 00:00:00 2001
From: Marcio Teixeira <mlt4356-github@yahoo.com>
Date: Fri, 15 Jan 2021 12:59:27 -0700
Subject: [PATCH] Improve filament runout handling in FTDI EVE Touch UI

- On filament runout, take the user to the tune menu where they can initiate a filament change or resume the print.
---
 .../screens/confirm_user_request_alert_box.cpp        | 11 +++++++++--
 .../extui/lib/ftdi_eve_touch_ui/screens/tune_menu.cpp |  4 +++-
 Marlin/src/lcd/extui/ui_api.cpp                       |  4 ++++
 Marlin/src/lcd/extui/ui_api.h                         |  1 +
 4 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/confirm_user_request_alert_box.cpp b/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/confirm_user_request_alert_box.cpp
index 637709e186..59e1c8220d 100644
--- a/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/confirm_user_request_alert_box.cpp
+++ b/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/confirm_user_request_alert_box.cpp
@@ -36,8 +36,15 @@ void ConfirmUserRequestAlertBox::onRedraw(draw_mode_t mode) {
 bool ConfirmUserRequestAlertBox::onTouchEnd(uint8_t tag) {
   switch (tag) {
     case 1:
-      ExtUI::setUserConfirmed();
-      GOTO_PREVIOUS();
+      if (ExtUI::isPrintingPaused()) {
+        // The TuneMenu will call ExtUI::setUserConfirmed()
+        GOTO_SCREEN(TuneMenu);
+        current_screen.forget();
+      }
+      else {
+        ExtUI::setUserConfirmed();
+        GOTO_PREVIOUS();
+      }
       return true;
     case 2: GOTO_PREVIOUS(); return true;
     default:                 return false;
diff --git a/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/tune_menu.cpp b/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/tune_menu.cpp
index 2fce402cf0..5a290109ff 100644
--- a/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/tune_menu.cpp
+++ b/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/tune_menu.cpp
@@ -143,7 +143,9 @@ void TuneMenu::pausePrint() {
 
 void TuneMenu::resumePrint() {
   sound.play(twinkle, PLAY_ASYNCHRONOUS);
-  if (ExtUI::isPrintingFromMedia())
+  if (ExtUI::awaitingUserConfirm())
+    ExtUI::setUserConfirmed();
+  else if (ExtUI::isPrintingFromMedia())
     ExtUI::resumePrint();
   #ifdef ACTION_ON_RESUME
     else host_action_resume();
diff --git a/Marlin/src/lcd/extui/ui_api.cpp b/Marlin/src/lcd/extui/ui_api.cpp
index 7611dbb98a..18689fe36d 100644
--- a/Marlin/src/lcd/extui/ui_api.cpp
+++ b/Marlin/src/lcd/extui/ui_api.cpp
@@ -943,6 +943,10 @@ namespace ExtUI {
     feedrate_percentage = constrain(value, 10, 500);
   }
 
+  bool awaitingUserConfirm() {
+    return wait_for_user;
+  }
+
   void setUserConfirmed() {
     TERN_(HAS_RESUME_CONTINUE, wait_for_user = false);
   }
diff --git a/Marlin/src/lcd/extui/ui_api.h b/Marlin/src/lcd/extui/ui_api.h
index 5322ac69ce..478fe68909 100644
--- a/Marlin/src/lcd/extui/ui_api.h
+++ b/Marlin/src/lcd/extui/ui_api.h
@@ -197,6 +197,7 @@ namespace ExtUI {
   void setTravelAcceleration_mm_s2(const float);
   void setFeedrate_percent(const float);
   void setFlow_percent(const int16_t, const extruder_t);
+  bool awaitingUserConfirm();
   void setUserConfirmed();
 
   #if ENABLED(LIN_ADVANCE)