Touch Buttons variable repeat delay (#15236)

Marlin/src/lcd/menu/menu.cpp

  *       MenuItem_int3::action_edit(PSTR(MSG_SPEED), &feedrate_percentage, 10, 999)
  */
 void MenuItemBase::edit(strfunc_t strfunc, loadfunc_t loadfunc) {
+  #if ENABLED(TOUCH_BUTTONS)
+    ui.repeat_delay = 50;
+  #endif
   if (int16_t(ui.encoderPosition) < 0) ui.encoderPosition = 0;
   if (int16_t(ui.encoderPosition) > maxEditValue) ui.encoderPosition = maxEditValue;
   if (ui.should_draw())
 void MarlinUI::goto_screen(screenFunc_t screen, const uint16_t encoder/*=0*/, const uint8_t top/*=0*/, const uint8_t items/*=0*/) {
   if (currentScreen != screen) {
 
+    #if ENABLED(TOUCH_BUTTONS)
+      repeat_delay = 250;
+    #endif
+
     #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
       // Shadow for editing the fade height
       lcd_z_fade_height = planner.z_fade_height;

Marlin/src/lcd/ultralcd.cpp

     int8_t MarlinUI::encoderDirection = ENCODERBASE;
   #endif
 
+  #if ENABLED(TOUCH_BUTTONS)
+    uint8_t MarlinUI::repeat_delay;
+  #endif
+
   bool MarlinUI::lcd_clicked;
   float move_menu_scale;
 
           if (touch_buttons & (EN_A | EN_B)) {          // A and/or B button?
             encoderDiff = (ENCODER_STEPS_PER_MENU_ITEM) * (ENCODER_PULSES_PER_STEP) * encoderDirection;
             if (touch_buttons & EN_A) encoderDiff *= -1;
-            next_button_update_ms = ms + 50;            // Assume the repeat delay
+            next_button_update_ms = ms + repeat_delay;  // Assume the repeat delay
             if (!wait_for_unclick && !arrow_pressed) {  // On click prepare for repeat
               next_button_update_ms += 250;             // Longer delay on first press
               arrow_pressed = true;                     // Mark arrow as pressed

Marlin/src/lcd/ultralcd.h

 
   #if HAS_LCD_MENU
 
+    #if ENABLED(TOUCH_BUTTONS)
+      static uint8_t repeat_delay;
+    #endif
+
     #if ENABLED(ENCODER_RATE_MULTIPLIER)
       static bool encoderRateMultiplierEnabled;
       static millis_t lastEncoderMovementMillis;