按 API 自定义 Element / Frame / Background / Behind

import link.botwmcs.fizzy.ui.element.ElementPainter;
import link.botwmcs.fizzy.ui.element.ElementType;
import net.minecraft.client.gui.GuiGraphics;
 
public final class GuideLineElement implements ElementPainter {
    @Override
    public void render(GuiGraphics g, int leftPx, int topPx, int widthPx, int heightPx, float partialTick) {
        int y = topPx + Math.max(0, heightPx / 2);
        g.fill(leftPx, y, leftPx + widthPx, y + 1, 0xFF57D7FF);
    }
 
    @Override
    public ElementType type() {
        return ElementType.CUSTOM;
    }
}

import link.botwmcs.fizzy.ui.frame.FizzyFrame;
import link.botwmcs.fizzy.ui.frame.FrameMetrics;
import link.botwmcs.fizzy.ui.frame.FramePainter;
import net.minecraft.client.gui.GuiGraphics;
import net.minecraft.network.chat.Component;
 
public final class AccentFrame implements FramePainter {
    private final FizzyFrame delegate;
    private Layout layout;
 
    public AccentFrame(Component title) {
        this.delegate = new FizzyFrame(title);
    }
 
    @Override
    public void paint(GuiGraphics g, int left, int top, int w, int h, boolean drawBottomEdge, boolean hasBelow) {
        delegate.paint(g, left, top, w, h, drawBottomEdge, hasBelow);
        g.fill(left + 2, top + 2, left + w - 2, top + 4, 0xFF57D7FF);
    }
 
    @Override
    public FrameMetrics metrics() {
        return delegate.metrics();
    }
 
    @Override
    public void setLayout(int left, int top, int w, int h, boolean drawBottomEdge, boolean hasBelow) {
        this.layout = new Layout(left, top, w, h, drawBottomEdge, hasBelow);
        delegate.setLayout(left, top, w, h, drawBottomEdge, hasBelow);
    }
 
    @Override
    public Layout layout() {
        return layout;
    }
}

import link.botwmcs.fizzy.ui.background.BgPainter;
import link.botwmcs.fizzy.ui.frame.FramePainter;
import net.minecraft.client.gui.GuiGraphics;
 
public final class GridBg implements BgPainter {
    @Override
    public void paint(GuiGraphics g, FramePainter frame) {
        var a = frame.currentBackgroundArea();
        g.fill(a.x(), a.y(), a.x() + a.w(), a.y() + a.h(), 0xCC111111);
        for (int x = a.x(); x < a.x() + a.w(); x += 9) {
            g.fill(x, a.y(), x + 1, a.y() + a.h(), 0x3314B8FF);
        }
    }
}

import link.botwmcs.fizzy.ui.behind.BehindPainter;
import link.botwmcs.fizzy.ui.behind.BehindType;
import link.botwmcs.fizzy.ui.frame.FramePainter;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.GuiGraphics;
 
public final class DimBehind implements BehindPainter {
    @Override
    public void paint(GuiGraphics g, FramePainter painter, float partialTick) {
        var mc = Minecraft.getInstance();
        int sw = mc.getWindow().getGuiScaledWidth();
        int sh = mc.getWindow().getGuiScaledHeight();
        g.fill(0, 0, sw, sh, 0x88000000);
    }
 
    @Override
    public BehindType type() {
        return BehindType.SOILD_COLOR;
    }
}