mame/ui: Deemphasized default configuration values

src/frontend/mame/ui/confswitch.cpp

@@ -129,6 +129,9 @@ void menu_confswitch::populate()
 				if (field.has_next_setting())
 					flags |= FLAG_RIGHT_ARROW;
 
+				if (field.live().value == field.defvalue())
+					flags |= FLAG_AT_DEFAULT;
+
 				// add the menu item
 				item_append(field.name(), field.setting_name(), flags, &field);
 			}

src/frontend/mame/ui/inputmap.cpp

@@ -602,9 +602,9 @@ void menu_input::populate_sorted()
 		}
 		else
 		{
-			// otherwise, generate the sequence name and invert it if different from the default
+			// otherwise, generate the sequence name and invert it if same as the default
 			subtext = machine().input().seq_name(item.seq);
-			flags |= (item.seq != *item.defseq) ? FLAG_INVERT : 0;
+			flags |= (item.seq == *item.defseq) ? FLAG_AT_DEFAULT : 0;
 		}
 
 		// add the item

src/frontend/mame/ui/menu.cpp

@@ -889,13 +889,18 @@ void menu::draw(uint32_t flags)
 					if (!core_stricmp(pitem.subtext(), _("Auto")))
 						fgcolor2 = rgb_t(0xff,0xff,0x00);
 
+					if (subitem_invert) // disabled items are drawn with a dimmer color
+						fgcolor2 = fgcolor2.scale8(0.4f * 256); // 40%
+					else if ((pitem.flags() & FLAG_AT_DEFAULT) && !is_selected(itemnum)) // if at default value and not selected, draw with a dimmer color
+						fgcolor2 = fgcolor2.scale8(0.7F * 256); // 70%
+
 					// draw the subitem right-justified
 					ui().draw_text_full(
 							container(),
 							subitem_text,
 							effective_left + item_width, line_y0, effective_width - item_width,
 							text_layout::text_justify::RIGHT, text_layout::word_wrapping::TRUNCATE,
-							mame_ui_manager::NORMAL, subitem_invert ? fgcolor3 : fgcolor2, bgcolor,
+							mame_ui_manager::NORMAL, fgcolor2, bgcolor,
 							&subitem_width, nullptr,
 							line_height());
 				}

src/frontend/mame/ui/menu.h

@@ -59,7 +59,8 @@ class menu
 		FLAG_INVERT         = 1U << 2,
 		FLAG_DISABLE        = 1U << 4,
 		FLAG_UI_HEADING     = 1U << 5,
-		FLAG_COLOR_BOX      = 1U << 6
+		FLAG_COLOR_BOX      = 1U << 6,
+		FLAG_AT_DEFAULT     = 1U << 7
 	};
 
 	virtual ~menu();

src/frontend/mame/ui/sliders.cpp

@@ -200,6 +200,8 @@ void menu_sliders::populate()
 					flags |= FLAG_LEFT_ARROW;
 				if (curval < slider->maxval)
 					flags |= FLAG_RIGHT_ARROW;
+				if (curval == slider->defval)
+					flags |= FLAG_AT_DEFAULT;
 				item_append(slider->description, tempstring, flags, (void *)slider, menu_item_type::SLIDER);
 			}
 		}
@@ -225,6 +227,8 @@ void menu_sliders::populate()
 				flags |= FLAG_LEFT_ARROW;
 			if (curval < slider->maxval)
 				flags |= FLAG_RIGHT_ARROW;
+			if (curval == slider->defval)
+				flags |= FLAG_AT_DEFAULT;
 			item_append(slider->description, tempstring, flags, (void *)slider, menu_item_type::SLIDER);
 		}
 		else