Add non JEI item dragging for the Crafting Terminal

src/main/java/de/ellpeck/prettypipes/terminal/containers/CraftingTerminalGui.java

@@ -2,25 +2,34 @@
 
 import com.mojang.blaze3d.platform.InputConstants;
 import de.ellpeck.prettypipes.PrettyPipes;
+import de.ellpeck.prettypipes.misc.ItemTerminalWidget;
 import de.ellpeck.prettypipes.packets.PacketButton;
+import de.ellpeck.prettypipes.packets.PacketGhostSlot;
+import de.ellpeck.prettypipes.terminal.CraftingTerminalBlockEntity;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.components.Button;
 import net.minecraft.client.gui.components.Tooltip;
 import net.minecraft.client.gui.screens.Screen;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.entity.player.Inventory;
+import net.minecraft.world.inventory.Slot;
 import net.neoforged.neoforge.network.PacketDistributor;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Optional;
 
 public class CraftingTerminalGui extends ItemTerminalGui {
 
     private static final ResourceLocation TEXTURE = ResourceLocation.fromNamespaceAndPath(PrettyPipes.ID, "textures/gui/crafting_terminal.png");
     private Button requestButton;
     private Button sendBackButton;
 
+    private ItemTerminalWidget draggedItem;
+    private boolean dragging;
+
     public CraftingTerminalGui(ItemTerminalContainer screenContainer, Inventory inv, Component titleIn) {
         super(screenContainer, inv, titleIn);
         this.imageWidth = 256;
@@ -59,24 +68,23 @@ public void containerTick() {
 
     @Override
     protected void renderLabels(GuiGraphics graphics, int mouseX, int mouseY) {
-        super.renderLabels(graphics, mouseX, mouseY);
-
-        var container = this.getCraftingContainer();
-        var tile = container.getTile();
-        for (var i = 0; i < tile.ghostItems.getSlots(); i++) {
-            if (!tile.craftItems.getStackInSlot(i).isEmpty())
-                continue;
-            var ghost = tile.ghostItems.getStackInSlot(i);
-            if (ghost.isEmpty())
-                continue;
-            var finalI = i;
-            var slot = container.slots.stream().filter(s -> s.container == container.craftInventory && s.getSlotIndex() == finalI).findFirst().orElse(null);
-            if (slot == null)
-                continue;
-            graphics.renderItem(ghost, slot.x, slot.y);
-            graphics.renderItemDecorations(this.font, ghost, slot.x, slot.y, "0");
+            super.renderLabels(graphics, mouseX, mouseY);
+            var container = this.getCraftingContainer();
+            var tile = container.getTile();
+            for (var i = 0; i < tile.ghostItems.getSlots(); i++) {
+                if (!tile.craftItems.getStackInSlot(i).isEmpty())
+                    continue;
+                var ghost = tile.ghostItems.getStackInSlot(i);
+                if (ghost.isEmpty())
+                    continue;
+                var finalI = i;
+                var slot = container.slots.stream().filter(s -> s.container == container.craftInventory && s.getSlotIndex() == finalI).findFirst().orElse(null);
+                if (slot == null)
+                    continue;
+                graphics.renderItem(ghost, slot.x, slot.y);
+                graphics.renderItemDecorations(this.font, ghost, slot.x, slot.y, "0");
+            }
         }
-    }
 
     @Override
     protected ResourceLocation getTexture() {
@@ -92,4 +100,57 @@ protected CraftingTerminalContainer getCraftingContainer() {
         return (CraftingTerminalContainer) this.menu;
     }
 
+    @Override
+    public boolean mouseClicked(double mouseX, double mouseY, int button) {
+        if(button == 0 && this.draggedItem == null) {
+            this.getChildAt(mouseX,mouseY).ifPresent(widget -> this.draggedItem = widget instanceof ItemTerminalWidget  terminalWidget && !terminalWidget.stack.isEmpty()? terminalWidget : null);
+        }
+        return super.mouseClicked(mouseX, mouseY, button);
+    }
+
+    @Override
+    public boolean mouseReleased(double mouseX, double mouseY, int button) {
+
+        Slot curSlot= getSlotUnderMouse();
+        if(draggedItem!=null && !draggedItem.stack.isEmpty() && curSlot!=null && curSlot.index>=0 && curSlot.index <9) {
+            List<PacketGhostSlot.Entry> stacks = new ArrayList<>();
+            if( menu.tile instanceof CraftingTerminalBlockEntity craftingTerminalBlockEntity) {
+                for (int i = 0; i < craftingTerminalBlockEntity.ghostItems.getSlots(); i++) {
+                    if (i != curSlot.index-1)
+                        stacks.add(i, new PacketGhostSlot.Entry(Optional.of(List.of(craftingTerminalBlockEntity.ghostItems.getStackInSlot(i))), Optional.empty()));
+                    else {
+                        stacks.add(i, new PacketGhostSlot.Entry(Optional.of(List.of(draggedItem.stack)), Optional.empty()));
+                    }
+
+                }
+                PacketDistributor.sendToServer(new PacketGhostSlot(craftingTerminalBlockEntity.getBlockPos(), stacks));
+            }
+        }
+        dragging=false;
+        draggedItem=null;
+        return super.mouseReleased(mouseX, mouseY, button);
+
+    }
+
+    @Override
+    public boolean mouseDragged(double mouseX, double mouseY, int i, double j, double k) {
+        if(this.draggedItem != null) {
+            double distance = j*j+k*k;
+            if(distance>2)
+                dragging=true;
+        }
+        return super.mouseDragged(mouseX, mouseY, i, j, k);
+    }
+
+    @Override
+    public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
+        super.render(graphics, mouseX, mouseY, partialTicks);
+        if(draggedItem!=null && dragging) {
+            graphics.pose().pushPose();
+            graphics.pose().translate(0, 0, 200);
+            graphics.renderItem(draggedItem.stack, mouseX-9, mouseY - 9);
+            graphics.pose().popPose();
+        }
+    }
+
 }