Button list

    public class ButtonList {
        public int xPos;
        public int yPos;
        public int height;
        public int width;
        public int itemHeight;
        public int itemWidth;
        public int scrollPos = 0;
        public TabButton button;
        public boolean active = false;
        Map<String, ? extends BeepediaPage> list;
        Map<String, BeepediaPage> reducedList = new HashMap<>();

        public ButtonList(int xPos, int yPos, int height, int width, int itemHeight, int itemWidth, TabButton button, Map<String, ? extends BeepediaPage> list) {
            this.xPos = xPos;
            this.yPos = yPos;
            this.height = height;
            this.width = width;
            this.itemHeight = itemHeight;
            this.itemWidth = itemWidth;
            this.list = list;
            this.button = button;
            updateReducedList(null);
            list.forEach((s, b) -> b.listButton.setParent(this));
        }

        public void updateReducedList(String search) {
            reducedList.clear();
            if (search != null && !search.isEmpty() && !search.equals("")) {
                list.forEach((s, b) -> {
                    if (s.contains(search.toLowerCase()) || b.getTranslation().toLowerCase().contains(search.toLowerCase())) {
                        reducedList.put(s, b);
                    }
                });
            } else {
                reducedList = new HashMap<>(list);
            }
        }

        public void updatePos(int newPos) {
            // update position of list
            if (height > reducedList.size() * 20) return;
            scrollPos -= newPos;
            if (scrollPos > 0) scrollPos = 0;
            else if (scrollPos < -(reducedList.size() * 20 - height)) scrollPos = -(reducedList.size() * 20 - height);
        }

        public void updateList() {
            // update each button
            AtomicInteger counter = new AtomicInteger();
            reducedList.forEach((s, b) -> {
                b.updateListPosition(xPos, (yPos + scrollPos + counter.get() * itemHeight));
                counter.getAndIncrement();
            });
        }

        public void setActive(boolean active) {
            this.active = active;
            list.forEach((s, b) -> {
                if (b.listButton != null) b.listButton.visible = active;
            });
        }
    }

    public class ListButton extends TabImageButton {
        private final TextComponent text;
        private final int textX;
        private final int textY;
        private FontRenderer fontRenderer;
        private BeepediaScreen.ButtonList parent = null;

        public ListButton(int xIn, int yIn, int widthIn, int heightIn, int xTexStartIn, int yTexStartIn, int yDiffTextIn, ResourceLocation resourceLocationIn, @NotNull ItemStack displayItem, int itemX, int itemY, TextComponent text, int textX, int textY, IPressable onPressIn) {
            super(xIn, yIn, widthIn, heightIn, xTexStartIn, yTexStartIn, yDiffTextIn, resourceLocationIn, displayItem, itemX, itemY, onPressIn);
            this.text = text;
            this.textX = textX;
            this.textY = textY;
            this.fontRenderer = Minecraft.getInstance().fontRenderer;
        }

        public void setParent(BeepediaScreen.ButtonList parent) {
            this.parent = parent;
        }

        @Override
        public void renderButton(@Nonnull MatrixStack matrix, int p_renderButton_1_, int p_renderButton_2_, float p_renderButton_3_) {
            Minecraft minecraft = Minecraft.getInstance();
            minecraft.getTextureManager().bindTexture(this.resourceLocation);
            RenderSystem.disableDepthTest();
            int i = this.yTexStart;
            if (!this.active) {
                i += yDiffText * 2;
            } else if (this.isHovered()) {
                i += this.yDiffText;
            }
            if (parent != null) {
                double scale = minecraft.getWindow().getGuiScaleFactor();
                GL11.glEnable(GL11.GL_SCISSOR_TEST);
                GL11.glScissor((int) (parent.xPos * scale), (int) (parent.yPos * scale), (int) (parent.width * scale), (int) (parent.height * scale));
            }
            drawTexture(matrix, this.x, this.y, (float) this.xTexStart, (float) i, this.width, this.height, 128, 128);
            fontRenderer.draw(matrix, text, this.x + textX, this.y + textY, Color.parse("white").getRgb());

            if (this.displayItem != null)
                Minecraft.getInstance().getItemRenderer().renderItemAndEffectIntoGUI(this.displayItem, this.x + this.itemX, this.y + this.itemY);
            RenderSystem.enableDepthTest();
            if (parent != null) GL11.glDisable(GL11.GL_SCISSOR_TEST);
        }
    }