Optimizations for showing volume level.

UI.hpp

@@ -565,7 +565,7 @@ void encoder_left_up(void)
     soften_volume.update(soften_volume.value() + (VOLUME_MAX - VOLUME_MIN) / VOLUME_ENC_STEPS, SOFTEN_VALUE_CHANGE_STEPS);
   else
     configuration.vol = VOLUME_MAX;
-  eeprom_write();
+
   UI_func_volume(0);
 }
 
@@ -579,7 +579,7 @@ void encoder_left_down(void)
     soften_volume.update(tmp, SOFTEN_VALUE_CHANGE_STEPS);
   else
     configuration.vol = VOLUME_MIN;
-  eeprom_write();
+
   UI_func_volume(0);
 }
 
@@ -1730,24 +1730,27 @@ void UI_func_volume(uint8_t param)
   Serial.println(F("UI_func_volume()"));
 #endif
 
-  menu_state = MENU_VOLUME;
   back_from_volume = 0;
 
-  // update LCD content
-  LCDML.DISP_clear();
-  lcd.show(0, 0, 8, "Volume: ");
-  lcd.show(0, 9, 3, configuration.vol);
+  if (menu_state != MENU_VOLUME)
+  {
+    lcd.show(0, 0, LCD_cols, "Volume:");
+    lcd.show(1, 0, LCD_cols, "[              ]");
+    menu_state = MENU_VOLUME;
+  }
+
+  lcd.setCursor(8, 0);
+  lcd_display_int(configuration.vol, 3, true, false, false);
   lcd.setCursor(1, 1);
-  for (uint8_t i = 0; i < LCD_cols; i++)
+  for (uint8_t i = 0; i < LCD_cols - 2; i++)
   {
-    if (i < int((LCD_cols - 2) * configuration.vol / 100.0))
+    if (i < int(((LCD_cols - 2) * configuration.vol / 100.0) + 0.5))
       lcd.print(F("*"));
     else
       lcd.print(F(" "));
   }
   set_volume(configuration.vol, configuration.pan[0], configuration.mono);
-  lcd.show(1, 0, 1, "[");
-  lcd.show(1, 15, 1, "]");
+  eeprom_write();
 }
 
 void UI_function_not_enabled(void)