Allow to live-tune K during a print

Firmware/menu.cpp

@@ -96,7 +96,7 @@ void menu_back(void)
 menu_back(1);
 }
 
-static void menu_back_no_reset(void)
+void menu_back_no_reset(void)
 {
 	if (menu_depth > 0)
 	{
@@ -130,7 +130,7 @@ void menu_submenu(menu_func_t submenu)
 	}
 }
 
-static void menu_submenu_no_reset(menu_func_t submenu)
+void menu_submenu_no_reset(menu_func_t submenu)
 {
 	if (menu_depth < MENU_DEPTH_MAX)
 	{

Firmware/menu.h

@@ -54,6 +54,7 @@ void menu_start(void);
 extern void menu_end(void);
 
 extern void menu_back(void);
+extern void menu_back_no_reset(void);
 extern void menu_back(uint8_t nLevel);
 
 extern void menu_back_if_clicked(void);
@@ -61,6 +62,7 @@ extern void menu_back_if_clicked(void);
 extern void menu_back_if_clicked_fb(void);
 
 extern void menu_submenu(menu_func_t submenu);
+extern void menu_submenu_no_reset(menu_func_t submenu);
 
 extern uint8_t menu_item_ret(void);
 
@@ -98,6 +100,7 @@ extern const char menu_fmt_int3[];
 
 extern const char menu_fmt_float31[];
 extern const char menu_fmt_float13[];
+extern const char menu_fmt_float13off[];
 
 
 extern void menu_draw_float31(const char* str, float val);

Firmware/ultralcd.cpp

@@ -6606,6 +6606,60 @@ static void lcd_colorprint_change() {
 	lcd_draw_update = 3;
 }
 
+
+#ifdef LIN_ADVANCE
+// @wavexx: looks like there's no generic float editing function in menu.cpp so we
+//          redefine our custom handling functions to mimick other tunables
+#define MSG_ADVANCE_K PSTR("Advance K:")
+
+static void lcd_advance_draw_K(char chr, float val)
+{
+    if (val <= 0)
+        lcd_printf_P(menu_fmt_float13off, chr, MSG_ADVANCE_K, " [off]");
+    else
+        lcd_printf_P(menu_fmt_float13, chr, MSG_ADVANCE_K, val);
+}
+
+static void lcd_advance_edit_K(void)
+{
+    if (lcd_draw_update)
+    {
+        if (lcd_encoder < 0) lcd_encoder = 0;
+        if (lcd_encoder > 999) lcd_encoder = 999;
+        lcd_set_cursor(0, 1);
+        lcd_advance_draw_K(' ', 0.01 * lcd_encoder);
+    }
+    if (LCD_CLICKED)
+    {
+        extruder_advance_K = 0.01 * lcd_encoder;
+        menu_back_no_reset();
+    }
+}
+
+static uint8_t lcd_advance_K()
+{
+    if (menu_item == menu_line)
+    {
+        if (lcd_draw_update)
+        {
+            lcd_set_cursor(0, menu_row);
+            lcd_advance_draw_K((lcd_encoder == menu_item)?'>':' ', extruder_advance_K);
+        }
+        if (menu_clicked && (lcd_encoder == menu_item))
+        {
+            menu_submenu_no_reset(lcd_advance_edit_K);
+            lcd_encoder = 100. * extruder_advance_K;
+            return menu_item_ret();
+        }
+    }
+    menu_item++;
+    return 0;
+}
+
+#define MENU_ITEM_EDIT_advance_K() do { if (lcd_advance_K()) return; } while (0)
+#endif
+
+
 static void lcd_tune_menu()
 {
 	typedef struct
@@ -6644,8 +6698,11 @@ static void lcd_tune_menu()
 
 	MENU_ITEM_EDIT_int3_P(_T(MSG_FAN_SPEED), &fanSpeed, 0, 255);//5
 	MENU_ITEM_EDIT_int3_P(_i("Flow"), &extrudemultiply, 10, 999);//6////MSG_FLOW
+#ifdef LIN_ADVANCE
+	MENU_ITEM_EDIT_advance_K();//7
+#endif
 #ifdef FILAMENTCHANGEENABLE
-	MENU_ITEM_FUNCTION_P(_T(MSG_FILAMENTCHANGE), lcd_colorprint_change);//7
+	MENU_ITEM_FUNCTION_P(_T(MSG_FILAMENTCHANGE), lcd_colorprint_change);//8
 #endif
 
 #ifdef FILAMENT_SENSOR