Fix JEI Highlight for Custom MUI2 Widgets (#2812)

Author: ghzdude

src/main/java/gregtech/client/utils/RenderUtil.java

@@ -1,6 +1,7 @@
 package gregtech.client.utils;
 
 import gregtech.api.gui.resources.TextureArea;
+import gregtech.api.util.Mods;
 
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.FontRenderer;
@@ -27,6 +28,9 @@
 
 import codechicken.lib.vec.Matrix4;
 import com.cleanroommc.modularui.api.MCHelper;
+import com.cleanroommc.modularui.api.widget.IWidget;
+import com.cleanroommc.modularui.integration.jei.JeiGhostIngredientSlot;
+import com.cleanroommc.modularui.integration.jei.ModularUIJeiPlugin;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.lwjgl.opengl.GL11;
@@ -711,4 +715,15 @@ public void put(int element, float @NotNull... data) {
     public static @NotNull TextureAtlasSprite getMissingSprite() {
         return getTextureMap().getMissingSprite();
     }
+
+    public static void handleJeiGhostHighlight(IWidget slot) {
+        if (!Mods.JustEnoughItems.isModLoaded()) return;
+        if (!(slot instanceof JeiGhostIngredientSlot<?>ingredientSlot)) return;
+        if (ModularUIJeiPlugin.hasDraggingGhostIngredient() ||
+                ModularUIJeiPlugin.hoveringOverIngredient(ingredientSlot)) {
+            GlStateManager.colorMask(true, true, true, false);
+            ingredientSlot.drawHighlight(slot.getArea(), slot.isHovering());
+            GlStateManager.colorMask(true, true, true, true);
+        }
+    }
 }

src/main/java/gregtech/common/mui/widget/GTFluidSlot.java

@@ -5,6 +5,7 @@
 import gregtech.api.util.FluidTooltipUtil;
 import gregtech.api.util.GTUtility;
 import gregtech.api.util.LocalizationUtils;
+import gregtech.client.utils.RenderUtil;
 import gregtech.client.utils.TooltipHelper;
 
 import net.minecraft.client.renderer.GlStateManager;
@@ -137,6 +138,8 @@ public void draw(ModularGuiContext context, WidgetSlotTheme widgetTheme) {
             GuiDraw.drawRect(1, 1, getArea().w() - 2, getArea().h() - 2, widgetTheme.getSlotHoverColor());
             GlStateManager.colorMask(true, true, true, true);
         }
+
+        RenderUtil.handleJeiGhostHighlight(this);
     }
 
     @Override

src/main/java/gregtech/common/mui/widget/workbench/CraftingInputSlot.java

@@ -102,13 +102,15 @@ public void onMouseDrag(int mouseButton, long timeSinceClick) {
     @Override
     public void draw(ModularGuiContext context, WidgetTheme widgetTheme) {
         ItemStack itemstack = this.syncHandler.getStack();
-        if (itemstack.isEmpty()) return;
+        if (!itemstack.isEmpty()) {
+            if (!this.hasIngredients) {
+                RenderUtil.renderRect(0, 0, 18, 18, 200, 0x80FF0000);
+            }
 
-        if (!this.hasIngredients) {
-            RenderUtil.renderRect(0, 0, 18, 18, 200, 0x80FF0000);
+            RenderUtil.renderItem(itemstack, 1, 1, 16, 16);
         }
 
-        RenderUtil.renderItem(itemstack, 1, 1, 16, 16);
+        RenderUtil.handleJeiGhostHighlight(this);
     }
 
     @Override