Inventory rows height test

src/main/kotlin/ru/dbotthepony/mc/otm/client/Ext.kt

@@ -4,6 +4,10 @@ import net.minecraft.client.Minecraft
 import net.minecraft.client.gui.Font
 import net.minecraft.client.resources.sounds.SimpleSoundInstance
 import net.minecraft.sounds.SoundEvents
+import org.lwjgl.glfw.GLFW
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+import java.nio.DoubleBuffer
 
 inline val minecraft: Minecraft get() = Minecraft.getInstance()
 inline val font: Font get() = minecraft.font
@@ -11,3 +15,64 @@ inline val font: Font get() = minecraft.font
 fun playGuiClickSound() {
 	minecraft.soundManager.play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1.0f))
 }
+
+fun setMousePos(x: Double, y: Double) {
+	GLFW.glfwSetCursorPos(minecraft.window.window, x, y)
+}
+
+private val cursorXPosBuf = ByteBuffer.allocateDirect(8).also { it.order(ByteOrder.LITTLE_ENDIAN) }.asDoubleBuffer()
+private val cursorYPosBuf = ByteBuffer.allocateDirect(8).also { it.order(ByteOrder.LITTLE_ENDIAN) }.asDoubleBuffer()
+
+data class MousePos(val x: Double, val y: Double) {
+	fun set() {
+		setMousePos(x, y)
+	}
+
+	fun move(x: Double = 0.0, y: Double = 0.0) {
+		GLFW.glfwSetCursorPos(minecraft.window.window, this.x + x, this.y + y)
+	}
+
+	fun move(x: Float = 0.0f, y: Float = 0.0f) {
+		GLFW.glfwSetCursorPos(minecraft.window.window, this.x + x, this.y + y)
+	}
+
+	fun moveScaled(x: Double = 0.0, y: Double = 0.0) {
+		GLFW.glfwSetCursorPos(minecraft.window.window, this.x + x * minecraft.window.guiScale, this.y + y * minecraft.window.guiScale)
+	}
+
+	fun moveScaled(x: Float = 0.0f, y: Float = 0.0f) {
+		GLFW.glfwSetCursorPos(minecraft.window.window, this.x + x * minecraft.window.guiScale, this.y + y * minecraft.window.guiScale)
+	}
+}
+
+val mousePos: MousePos get() {
+	cursorXPosBuf.position(0)
+	cursorYPosBuf.position(0)
+
+	GLFW.glfwGetCursorPos(minecraft.window.window, cursorXPosBuf, cursorYPosBuf)
+
+	cursorXPosBuf.position(0)
+	cursorYPosBuf.position(0)
+
+	return MousePos(cursorXPosBuf.get(), cursorYPosBuf.get())
+}
+
+fun moveMousePos(x: Double = 0.0, y: Double = 0.0) {
+	val (currentX, currentY) = mousePos
+	GLFW.glfwSetCursorPos(minecraft.window.window, currentX + x, currentY + y)
+}
+
+fun moveMousePos(x: Float = 0.0f, y: Float = 0.0f) {
+	val (currentX, currentY) = mousePos
+	GLFW.glfwSetCursorPos(minecraft.window.window, currentX + x, currentY + y)
+}
+
+fun moveMousePosScaled(x: Double = 0.0, y: Double = 0.0) {
+	val (currentX, currentY) = mousePos
+	GLFW.glfwSetCursorPos(minecraft.window.window, currentX + x * minecraft.window.guiScale, currentY + y * minecraft.window.guiScale)
+}
+
+fun moveMousePosScaled(x: Float = 0.0f, y: Float = 0.0f) {
+	val (currentX, currentY) = mousePos
+	GLFW.glfwSetCursorPos(minecraft.window.window, currentX + x * minecraft.window.guiScale, currentY + y * minecraft.window.guiScale)
+}

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

@@ -6,7 +6,7 @@ import net.minecraft.resources.ResourceLocation
 import ru.dbotthepony.mc.otm.client.screen.panels.DockProperty
 
 @Suppress("unused")
-class SkinGrid(
+data class SkinGrid(
 	val texture: ResourceLocation,
 	val width: Float,
 	val height: Float,
@@ -92,14 +92,15 @@ fun ResourceLocation.vLine(
 ) = SkinElement(this, x, y, 1f, height, textureWidth, textureHeight)
 
 @Suppress("unused")
-class SkinElement @JvmOverloads constructor(
+data class SkinElement @JvmOverloads constructor(
 	val texture: ResourceLocation,
 	val x: Float,
 	val y: Float,
 	val width: Float,
 	val height: Float,
 	val imageWidth: Float = 256f,
-	val imageHeight: Float = 256f
+	val imageHeight: Float = 256f,
+	val winding: UVWindingOrder = UVWindingOrder.NORMAL
 ) {
 	init {
 		require(x >= 0f) { "Invalid x $x" }
@@ -117,7 +118,7 @@ class SkinElement @JvmOverloads constructor(
 		y: Float = 0f,
 		width: Float = this.width,
 		height: Float = this.height,
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1
+		winding: UVWindingOrder = this.winding
 	) {
 		RenderSystem.setShaderTexture(0, texture)
 		RenderSystem.enableBlend()
@@ -133,7 +134,7 @@ class SkinElement @JvmOverloads constructor(
 		y: Double = 0.0,
 		width: Double = this.width.toDouble(),
 		height: Double = this.height.toDouble(),
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1
+		winding: UVWindingOrder = this.winding
 	) = render(stack, x.toFloat(), y.toFloat(), width.toFloat(), height.toFloat(), winding)
 
 	@JvmOverloads
@@ -143,7 +144,7 @@ class SkinElement @JvmOverloads constructor(
 		y: Float = 0f,
 		width: Float = this.width,
 		height: Float = this.height,
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1
+		winding: UVWindingOrder = this.winding
 	) {
 		RenderSystem.setShaderTexture(0, texture)
 		RenderSystem.enableBlend()
@@ -159,7 +160,7 @@ class SkinElement @JvmOverloads constructor(
 		y: Double = 0.0,
 		width: Double = this.width.toDouble(),
 		height: Double = this.height.toDouble(),
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1
+		winding: UVWindingOrder = this.winding
 	) = renderPartial(stack, x.toFloat(), y.toFloat(), width.toFloat(), height.toFloat(), winding)
 
 	@JvmOverloads
@@ -168,7 +169,7 @@ class SkinElement @JvmOverloads constructor(
 		x: Float = 0f,
 		y: Float = 0f,
 		width: Float = this.width,
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1,
+		winding: UVWindingOrder = this.winding
 	) {
 		render(stack, x, y, width = width, winding = winding)
 	}
@@ -179,7 +180,7 @@ class SkinElement @JvmOverloads constructor(
 		x: Double,
 		y: Double = 0.0,
 		width: Double = this.width.toDouble(),
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1,
+		winding: UVWindingOrder = this.winding,
 	) = renderWidth(stack, x.toFloat(), y.toFloat(), width.toFloat(), winding)
 
 	@JvmOverloads
@@ -188,7 +189,7 @@ class SkinElement @JvmOverloads constructor(
 		x: Float = 0f,
 		y: Float = 0f,
 		height: Float = this.height,
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1,
+		winding: UVWindingOrder = this.winding,
 	) {
 		render(stack, x, y, height = height, winding = winding)
 	}
@@ -199,7 +200,7 @@ class SkinElement @JvmOverloads constructor(
 		x: Double,
 		y: Double = 0.0,
 		height: Double = this.height.toDouble(),
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1,
+		winding: UVWindingOrder = this.winding,
 	) = renderHieght(stack, x.toFloat(), y.toFloat(), height.toFloat(), winding)
 
 	private val u0 = this.x / imageWidth
@@ -214,7 +215,7 @@ class SkinElement @JvmOverloads constructor(
 		y: Float = 0f,
 		width: Float = this.width,
 		height: Float = this.height,
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1
+		winding: UVWindingOrder = UVWindingOrder.NORMAL
 	) {
 		val winded = winding.translate(u0, v0, u1, v1)
 
@@ -235,7 +236,7 @@ class SkinElement @JvmOverloads constructor(
 		y: Double = 0.0,
 		width: Double = this.width.toDouble(),
 		height: Double = this.height.toDouble(),
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1
+		winding: UVWindingOrder = UVWindingOrder.NORMAL
 	) = renderRaw(stack, x.toFloat(), y.toFloat(), width.toFloat(), height.toFloat(), winding)
 
 	@JvmOverloads
@@ -245,7 +246,7 @@ class SkinElement @JvmOverloads constructor(
 		y: Float = 0f,
 		width: Float = this.width,
 		height: Float = this.height,
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1
+		winding: UVWindingOrder = UVWindingOrder.NORMAL
 	) {
 		val u1 = (this.x + width) / imageWidth
 		val v1 = (this.y + height) / imageHeight
@@ -269,11 +270,11 @@ class SkinElement @JvmOverloads constructor(
 		y: Double = 0.0,
 		width: Double = this.width.toDouble(),
 		height: Double = this.height.toDouble(),
-		winding: UVWindingOrder = UVWindingOrder.U0_V0_U1_V1
+		winding: UVWindingOrder = UVWindingOrder.NORMAL
 	) = renderRawPartial(stack, x.toFloat(), y.toFloat(), width.toFloat(), height.toFloat(), winding)
 }
 
-class StretchingRectangleElement(
+data class StretchingRectangleElement(
 	val topLeft: SkinElement,
 	val topRight: SkinElement,
 	val bottomLeft: SkinElement,

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

@@ -0,0 +1,15 @@
+package ru.dbotthepony.mc.otm.client.render
+
+object Widgets {
+	val SLOT = WidgetLocation.WIDGETS.element(0f, 0f, 18f, 18f)
+
+	val ARROW_UP_BUTTON_IDLE = WidgetLocation.WIDGETS.element(0f, 18f, 18f, 6f)
+	val ARROW_UP_BUTTON_HOVERED = WidgetLocation.WIDGETS.element(0f, 18f + 6f, 18f, 6f)
+	val ARROW_UP_BUTTON_PRESSED = WidgetLocation.WIDGETS.element(0f, 18f + 6f * 2f, 18f, 6f)
+	val ARROW_UP_BUTTON_DISABLED = WidgetLocation.WIDGETS.element(0f, 18f + 6f * 3f, 18f, 6f)
+
+	val ARROW_DOWN_BUTTON_IDLE = ARROW_UP_BUTTON_IDLE.copy(winding = UVWindingOrder.FLIP)
+	val ARROW_DOWN_BUTTON_HOVERED = ARROW_UP_BUTTON_HOVERED.copy(winding = UVWindingOrder.FLIP)
+	val ARROW_DOWN_BUTTON_PRESSED = ARROW_UP_BUTTON_PRESSED.copy(winding = UVWindingOrder.FLIP)
+	val ARROW_DOWN_BUTTON_DISABLED = ARROW_UP_BUTTON_DISABLED.copy(winding = UVWindingOrder.FLIP)
+}

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

@@ -3,10 +3,14 @@ package ru.dbotthepony.mc.otm.client.screen
 import com.mojang.blaze3d.platform.InputConstants
 import com.mojang.blaze3d.vertex.PoseStack
 import net.minecraft.client.gui.screens.inventory.InventoryScreen
+import ru.dbotthepony.mc.otm.client.mousePos
+import ru.dbotthepony.mc.otm.client.moveMousePos
+import ru.dbotthepony.mc.otm.client.moveMousePosScaled
 import ru.dbotthepony.mc.otm.client.render.Widgets18
 import ru.dbotthepony.mc.otm.core.TranslatableComponent
 import ru.dbotthepony.mc.otm.client.render.element
 import ru.dbotthepony.mc.otm.client.screen.panels.*
+import ru.dbotthepony.mc.otm.client.setMousePos
 import ru.dbotthepony.mc.otm.client.shouldOpenVanillaInventory
 import ru.dbotthepony.mc.otm.menu.ExoSuitInventoryMenu
 import ru.dbotthepony.mc.otm.network.ExoSuitMenuOpen
@@ -15,25 +19,59 @@ import yalter.mousetweaks.api.MouseTweaksDisableWheelTweak
 
 @MouseTweaksDisableWheelTweak
 class ExoSuitInventoryScreen(menu: ExoSuitInventoryMenu) : MatteryScreen<ExoSuitInventoryMenu>(menu, TranslatableComponent("otm.gui.exosuit")) {
+	var inventoryRows = 3
+		set(value) {
+			val newValue = value.coerceAtLeast(3).coerceAtMost(6)
+			val old = field
+
+			if (field != newValue) {
+				field = newValue
+
+				if (mainFrame != null) {
+					updateInventoryRows(old)
+				}
+			}
+		}
+
+	private lateinit var mainInventoryLine: EditablePanel<ExoSuitInventoryScreen>
+	private lateinit var scrollPanel: DiscreteScrollBarPanel<ExoSuitInventoryScreen>
+
+	private fun updateInventoryRows(old: Int) {
+		mainFrame!!.height = FRAME_BASE_HEIGHT + inventoryRows * AbstractSlotPanel.SIZE
+		mainInventoryLine.height = AbstractSlotPanel.SIZE * inventoryRows
+
+		for (i in scrollPanel.scroll until scrollPanel.scroll + old) {
+			getInventorySlotsRow(i).visible = false
+		}
+
+		for (i in scrollPanel.scroll until scrollPanel.scroll + inventoryRows) {
+			getInventorySlotsRow(i).also {
+				it.parent = mainInventoryLine
+				it.y = AbstractSlotPanel.SIZE * (i - scrollPanel.scroll)
+				it.visible = true
+			}
+		}
+
+		scrollPanel.scroll = scrollPanel.scroll
+	}
+
 	override fun makeMainFrame(): FramePanel<MatteryScreen<*>> {
-		val frame = FramePanel(this, width = 200f, height = 180f, title = this.title)
+		val frame = FramePanel(this, width = 200f, height = FRAME_BASE_HEIGHT + inventoryRows * AbstractSlotPanel.SIZE, title = this.title)
 
 		val toolbeltLine = EditablePanel(this, frame, height = 18f)
 		toolbeltLine.dock = Dock.BOTTOM
 
 		toolbeltLine.setDockMargin(top = 3f)
 
-		var mainInventoryLine: EditablePanel<*>? = null
-
-		val scrollPanel = DiscreteScrollBarPanel(this, null, maxScroll = { ((menu.playerCombinedInventorySlots.size - 27) + 8) / 9 },
+		scrollPanel = DiscreteScrollBarPanel(this, null, maxScroll = { ((menu.playerCombinedInventorySlots.size - inventoryRows * 9) + 8) / 9 },
 			scrollCallback = {
 					_, old, new ->
 
-				for (i in old .. old + 2) {
+				for (i in old until old + inventoryRows) {
 					getInventorySlotsRow(i).visible = false
 				}
 
-				for (i in new .. new + 2) {
+				for (i in new until new + inventoryRows) {
 					val row = getInventorySlotsRow(i)
 					row.visible = true
 					row.y = (i - new) * AbstractSlotPanel.SIZE
@@ -43,14 +81,13 @@ class ExoSuitInventoryScreen(menu: ExoSuitInventoryMenu) : MatteryScreen<ExoSuit
 				menu.lastScroll = new
 			})
 
-		scrollPanel.scroll = menu.lastScroll
-
-		mainInventoryLine = object : EditablePanel<ExoSuitInventoryScreen>(this@ExoSuitInventoryScreen, frame, height = 18f * 3f) {
+		mainInventoryLine = object : EditablePanel<ExoSuitInventoryScreen>(this@ExoSuitInventoryScreen, frame, height = AbstractSlotPanel.SIZE * inventoryRows) {
 			override fun mouseScrolledInner(x: Double, y: Double, scroll: Double): Boolean {
 				return scrollPanel.mouseScrolledInner(x, y, scroll)
 			}
 		}
 
+		scrollPanel.scroll = menu.lastScroll
 		scrollPanel.parent = mainInventoryLine
 
 		mainInventoryLine.dock = Dock.BOTTOM
@@ -63,7 +100,7 @@ class ExoSuitInventoryScreen(menu: ExoSuitInventoryMenu) : MatteryScreen<ExoSuit
 		val offhand = SlotPanel(this, toolbeltLine, menu.offhandSlot)
 		offhand.dock = Dock.RIGHT
 
-		for (i in scrollPanel.scroll .. scrollPanel.scroll + 2) {
+		for (i in scrollPanel.scroll until scrollPanel.scroll + inventoryRows) {
 			getInventorySlotsRow(i).also {
 				it.parent = mainInventoryLine
 				it.y = AbstractSlotPanel.SIZE * (i - scrollPanel.scroll)
@@ -113,7 +150,7 @@ class ExoSuitInventoryScreen(menu: ExoSuitInventoryMenu) : MatteryScreen<ExoSuit
 
 		val resultPanel = SlotPanel(this, craftingCanvas, menu.craftingResultSlot, x = craftingCanvas.width - 18f, y = topLine.height / 2f - 9f)
 
-		val arrowPanel = object : EditablePanel<ExoSuitInventoryScreen>(
+		object : EditablePanel<ExoSuitInventoryScreen>(
 			this@ExoSuitInventoryScreen,
 			craftingCanvas,
 			x = craftingSlotsCanvas.width,
@@ -132,15 +169,27 @@ class ExoSuitInventoryScreen(menu: ExoSuitInventoryMenu) : MatteryScreen<ExoSuit
 			shouldOpenVanillaInventory = true
 			val minecraft = minecraft!!
 
-			val mouseX = minecraft.mouseHandler.xpos()
-			val mouseY = minecraft.mouseHandler.ypos()
+			val (mouseX, mouseY) = mousePos
 
 			onClose()
 			minecraft.setScreen(InventoryScreen(minecraft.player!!))
 
-			InputConstants.grabOrReleaseMouse(minecraft.window.window, 212993, mouseX, mouseY)
+			setMousePos(mouseX, mouseY)
 		}).also { it.tooltip = TranslatableComponent("otm.gui.exosuit.go_back") }
 
+		HeightControls(this, frame, frame.width + 2f, frame.height.coerceAtMost(95f)) {
+			inventoryRows += if (it) 1 else -1
+
+			val movePixels = if (it) -AbstractSlotPanel.SIZE / 2f else AbstractSlotPanel.SIZE / 2f
+
+			frame.y += movePixels
+			moveMousePosScaled(y = movePixels)
+
+			HeightControls.Status.of(inventoryRows < 6, inventoryRows > 3)
+		}.also {
+			it.controlStatus = HeightControls.Status.of(inventoryRows < 6, inventoryRows > 3)
+		}
+
 		return frame
 	}
 
@@ -153,5 +202,7 @@ class ExoSuitInventoryScreen(menu: ExoSuitInventoryMenu) : MatteryScreen<ExoSuit
 		val ENTITY_RECTANGLE = INVENTORY_LOCATION.element(25f, 7f, 51f, 72f)
 		val STATUS_EFFECT_BG = INVENTORY_LOCATION.element(0f, 166f, 120f, 32f)
 		val CRAFT_ARROW = INVENTORY_LOCATION.element(135f, 29f, 16f, 13f)
+
+		const val FRAME_BASE_HEIGHT = 126f
 	}
 }

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

@@ -3,7 +3,7 @@ package ru.dbotthepony.mc.otm.client.screen.panels
 import com.mojang.blaze3d.platform.InputConstants
 import com.mojang.blaze3d.vertex.PoseStack
 import net.minecraft.ChatFormatting
-import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen
+import net.minecraft.client.gui.screens.Screen
 import net.minecraft.network.chat.Component
 import ru.dbotthepony.mc.otm.client.playGuiClickSound
 import ru.dbotthepony.mc.otm.core.TextComponent
@@ -15,7 +15,7 @@ import java.util.*
 import kotlin.collections.ArrayList
 import kotlin.reflect.KMutableProperty0
 
-open class ButtonPanel<out S : AbstractContainerScreen<*>>(
+open class ButtonPanel<out S : Screen>(
 	screen: S,
 	parent: EditablePanel<*>?,
 	x: Float = 0f,
@@ -42,6 +42,10 @@ open class ButtonPanel<out S : AbstractContainerScreen<*>>(
 	protected var callback: Runnable? = null
 	protected var pressed = false
 
+	protected open fun onClick(button: Int) {
+		callback?.run()
+	}
+
 	override fun mouseClickedInner(x: Double, y: Double, button: Int): Boolean {
 		if (isDisabled || pressed) {
 			return true
@@ -62,7 +66,7 @@ open class ButtonPanel<out S : AbstractContainerScreen<*>>(
 		pressed = false
 
 		if (isHovered) {
-			callback?.run()
+			onClick(button)
 		}
 
 		return true
@@ -113,7 +117,7 @@ open class ButtonPanel<out S : AbstractContainerScreen<*>>(
 }
 
 @Suppress("PropertyName")
-abstract class RectangleButtonPanel<out S : AbstractContainerScreen<*>>(
+abstract class RectangleButtonPanel<out S : Screen>(
 	screen: S,
 	parent: EditablePanel<*>?,
 	x: Float = 0f,
@@ -124,7 +128,7 @@ abstract class RectangleButtonPanel<out S : AbstractContainerScreen<*>>(
 ) : EditablePanel<S>(screen, parent, x, y, width, height) {
 	protected var pressed = false
 
-	protected open fun click(clickButton: Int) {
+	protected open fun onClick(clickButton: Int) {
 		onPress?.invoke(clickButton)
 	}
 
@@ -175,7 +179,7 @@ abstract class RectangleButtonPanel<out S : AbstractContainerScreen<*>>(
 			pressed = false
 
 			if (isHovered) {
-				click(button)
+				onClick(button)
 			}
 		}
 
@@ -185,7 +189,7 @@ abstract class RectangleButtonPanel<out S : AbstractContainerScreen<*>>(
 	}
 }
 
-abstract class EnumRectangleButtonPanel<out S : AbstractContainerScreen<*>, T : Enum<T>>(
+abstract class EnumRectangleButtonPanel<out S : Screen, T : Enum<T>>(
 	screen: S,
 	parent: EditablePanel<*>?,
 	x: Float = 0f,
@@ -293,7 +297,7 @@ abstract class EnumRectangleButtonPanel<out S : AbstractContainerScreen<*>, T :
 		return super.mouseReleasedInner(x, y, button)
 	}
 
-	override fun click(clickButton: Int) {
+	override fun onClick(clickButton: Int) {
 		when (clickButton) {
 			InputConstants.MOUSE_BUTTON_LEFT -> {
 				prop.set(prop.get().next(enum.enumConstants))
@@ -354,7 +358,7 @@ abstract class EnumRectangleButtonPanel<out S : AbstractContainerScreen<*>, T :
 	}
 }
 
-open class LargeRectangleButtonPanel<out S : AbstractContainerScreen<*>>(
+open class LargeRectangleButtonPanel<out S : Screen>(
 	screen: S,
 	parent: EditablePanel<*>?,
 	x: Float = 0f,
@@ -385,7 +389,7 @@ open class LargeRectangleButtonPanel<out S : AbstractContainerScreen<*>>(
 	}
 }
 
-open class LargeEnumRectangleButtonPanel<out S : AbstractContainerScreen<*>, T : Enum<T>>(
+open class LargeEnumRectangleButtonPanel<out S : Screen, T : Enum<T>>(
 	screen: S,
 	parent: EditablePanel<*>?,
 	x: Float = 0f,
@@ -407,7 +411,7 @@ open class LargeEnumRectangleButtonPanel<out S : AbstractContainerScreen<*>, T :
 	}
 }
 
-open class SmallRectangleButtonPanel<out S : AbstractContainerScreen<*>>(
+open class SmallRectangleButtonPanel<out S : Screen>(
 	screen: S,
 	parent: EditablePanel<*>?,
 	x: Float = 0f,
@@ -438,7 +442,7 @@ open class SmallRectangleButtonPanel<out S : AbstractContainerScreen<*>>(
 	}
 }
 
-open class SmallEnumRectangleButtonPanel<out S : AbstractContainerScreen<*>, T : Enum<T>>(
+open class SmallEnumRectangleButtonPanel<out S : Screen, T : Enum<T>>(
 	screen: S,
 	parent: EditablePanel<*>?,
 	x: Float = 0f,

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

@@ -95,13 +95,7 @@ open class DiscreteScrollBarPanel<S : Screen> @JvmOverloads constructor(
 				return
 			}
 
-			val newValue = if (value < 0) {
-				0
-			} else if (value > maxScroll.invoke(this)) {
-				maxScroll.invoke(this)
-			} else {
-				value
-			}
+			val newValue = value.coerceAtLeast(0).coerceAtMost(maxScroll.invoke(this))
 
 			if (newValue != field) {
 				val old = field

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

@@ -0,0 +1,79 @@
+package ru.dbotthepony.mc.otm.client.screen.panels
+
+import com.mojang.blaze3d.platform.InputConstants
+import net.minecraft.client.gui.screens.Screen
+import ru.dbotthepony.mc.otm.client.render.SkinElement
+import ru.dbotthepony.mc.otm.client.render.Widgets
+
+open class HeightControls<out S : Screen>(
+	screen: S,
+	parent: EditablePanel<*>?,
+	x: Float = 0f,
+	y: Float = 0f,
+	val callback: (isIncrease: Boolean) -> Status
+) : BackgroundPanel<S>(screen, parent, x, y, WIDTH, HEIGHT) {
+	enum class Status(val canIncrease: Boolean, val canDecrease: Boolean) {
+		NONE(false, false),
+		INCREASE(true, false),
+		DECREASE(false, true),
+		EITHER(true, true);
+
+		companion object {
+			fun of(canIncrease: Boolean, canDecrease: Boolean): Status {
+				return if (canIncrease && canDecrease) {
+					EITHER
+				} else if (canIncrease) {
+					INCREASE
+				} else if (canDecrease) {
+					DECREASE
+				} else {
+					NONE
+				}
+			}
+		}
+	}
+
+	var controlStatus: Status = Status.EITHER
+		set(value) {
+			if (field == value)
+				return
+
+			field = value
+			increase.isDisabled = !value.canIncrease
+			decrease.isDisabled = !value.canDecrease
+		}
+
+	open inner class Control(val isIncrease: Boolean) : RectangleButtonPanel<S>(screen, this@HeightControls, width = BUTTON_WIDTH, height = BUTTON_HEIGHT) {
+		override val PRESSED: SkinElement = if (isIncrease) Widgets.ARROW_DOWN_BUTTON_PRESSED else Widgets.ARROW_UP_BUTTON_PRESSED
+		override val HOVERED: SkinElement = if (isIncrease) Widgets.ARROW_DOWN_BUTTON_HOVERED else Widgets.ARROW_UP_BUTTON_HOVERED
+		override val IDLE: SkinElement = if (isIncrease) Widgets.ARROW_DOWN_BUTTON_IDLE else Widgets.ARROW_UP_BUTTON_IDLE
+		override val DISABLED: SkinElement = if (isIncrease) Widgets.ARROW_DOWN_BUTTON_DISABLED else Widgets.ARROW_UP_BUTTON_DISABLED
+
+		init {
+			dock = Dock.TOP
+			dockBottom = 2f
+		}
+
+		override fun onClick(clickButton: Int) {
+			if (clickButton == InputConstants.MOUSE_BUTTON_LEFT) {
+				this@HeightControls.onClick(isIncrease)
+			} else if (clickButton == InputConstants.MOUSE_BUTTON_RIGHT) {
+				this@HeightControls.onClick(!isIncrease)
+			}
+		}
+	}
+
+	val decrease = Control(false)
+	val increase = Control(true)
+
+	open fun onClick(isIncrease: Boolean) {
+		controlStatus = callback.invoke(isIncrease)
+	}
+
+	companion object {
+		const val BUTTON_WIDTH = 18f
+		const val BUTTON_HEIGHT = 6f
+		const val WIDTH = BUTTON_WIDTH + 4f
+		const val HEIGHT = BUTTON_HEIGHT * 2f + 8f
+	}
+}