Proper charge slot background

src/main/kotlin/ru/dbotthepony/mc/otm/client/render/Widgets18.kt

@@ -58,6 +58,7 @@ object Widgets18 {
 	val EQUIPMENT_BATTERY_SLOT_BACKGROUND = slotBgGrid.next()
 	val PATTERN_SLOT_BACKGROUND = slotBgGrid.next()
 	val MATTER_CAPACITOR_SLOT_BACKGROUND = slotBgGrid.next()
+	val CHARGE_SLOT_BACKGROUND = slotBgGrid.next()
 
 	private val controlsGrid = WidgetLocation.SIDE_CONTROLS.grid(rows = 8, columns = 9)
 

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/ExoPackInventoryScreen.kt

@@ -218,7 +218,10 @@ class ExoPackInventoryScreen(menu: ExoPackInventoryMenu) : MatteryScreen<ExoPack
 		}
 
 		for (slot in menu.exoPackChargeSlots) {
-			SlotPanel(this, chargeStrip2, slot).dock = Dock.BOTTOM
+			SlotPanel(this, chargeStrip2, slot).also {
+				it.dock = Dock.BOTTOM
+				it.slotBackground = Widgets18.CHARGE_SLOT_BACKGROUND
+			}
 		}
 
 		scrollPanel.dock = Dock.RIGHT

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/panels/slot/AbstractSlotPanel.kt

@@ -21,10 +21,13 @@ abstract class AbstractSlotPanel<out S : MatteryScreen<*>> @JvmOverloads constru
 	y: Float = 0f,
 	width: Float = SIZE,
 	height: Float = SIZE,
-	open val noItemIcon: IGUIRenderable? = null
+	open var noItemIcon: IGUIRenderable? = null
 ) : EditablePanel<S>(screen, parent, x, y, width, height), IItemStackPanel {
+	open var slotBackground: IGUIRenderable? = null
+
 	protected open fun renderSlotBackground(graphics: GuiGraphics, mouseX: Float, mouseY: Float, partialTick: Float) {
 		SLOT_BACKGROUND.render(graphics, width = width, height = height)
+		slotBackground?.render(graphics, 0f, 0f, width, height)
 	}
 
 	protected open fun renderRegular(graphics: GuiGraphics, itemstack: ItemStack, countOverride: String? = null) {

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/panels/slot/InventorySlotPanel.kt

@@ -24,11 +24,9 @@ open class InventorySlotPanel<out S : MatteryScreen<*>, out T : MatteryMenu.Inve
 		get() = slot.filter?.get()
 		set(value) { slot.filter?.accept(value) }
 
-	override fun renderSlotBackground(graphics: GuiGraphics, mouseX: Float, mouseY: Float, partialTick: Float) {
-		super.renderSlotBackground(graphics, mouseX, mouseY, partialTick)
-
+	override fun renderBackgroundBeforeFilter(graphics: GuiGraphics, mouseX: Float, mouseY: Float, partialTick: Float) {
 		if (slot.chargeFlag?.get() == true) {
-			Widgets18.BATTERY_SLOT_BACKGROUND.render(graphics, 0f, 0f, width, height)
+			Widgets18.CHARGE_SLOT_BACKGROUND.render(graphics, 0f, 0f, width, height)
 		}
 	}
 

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/panels/slot/UserFilteredSlotPanel.kt

@@ -36,9 +36,13 @@ abstract class UserFilteredSlotPanel<out S : MatteryScreen<*>, out T : Slot>(
 ) : SlotPanel<S, T>(screen, parent, slot, x, y, width, height, noItemIcon) {
 	abstract var slotFilter: Item?
 
+	protected open fun renderBackgroundBeforeFilter(graphics: GuiGraphics, mouseX: Float, mouseY: Float, partialTick: Float) {}
+
 	override fun renderSlotBackground(graphics: GuiGraphics, mouseX: Float, mouseY: Float, partialTick: Float) {
 		super.renderSlotBackground(graphics, mouseX, mouseY, partialTick)
 
+		renderBackgroundBeforeFilter(graphics, mouseX, mouseY, partialTick)
+
 		if (slotFilter != null) {
 			if (slotFilter !== Items.AIR) {
 				val itemStack = ItemStack(slotFilter!!, 1)