fixed item filter population not being visible until the container is reopened

Closes #78

src/main/java/de/ellpeck/prettypipes/misc/ItemFilter.java

@@ -37,8 +37,7 @@ public class ItemFilter extends ItemStackHandler {
         super(size);
         this.stack = stack;
         this.pipe = pipe;
-        if (stack.hasTag())
+        this.load();
-            this.deserializeNBT(stack.getTag().getCompound("filter"));
     }
 
     public List<Slot> getSlots(int x, int y) {
@@ -69,12 +68,13 @@ public class ItemFilter extends ItemStackHandler {
         return buttons;
     }
 
-    public void onButtonPacket(int id) {
+    public void onButtonPacket(IFilteredContainer menu, int id) {
         if (id == 0 && this.canModifyWhitelist) {
             this.isWhitelist = !this.isWhitelist;
             this.modified = true;
             this.save();
         } else if (id == 1 && this.canPopulateFromInventories) {
+            var changed = false;
             // populate filter from inventories
             var filters = this.pipe.getFilters();
             for (var direction : Direction.values()) {
@@ -90,12 +90,15 @@ public class ItemFilter extends ItemStackHandler {
                     // try inserting into ourselves and any filter increase modifiers
                     for (var filter : filters) {
                         if (ItemHandlerHelper.insertItem(filter, copy, false).isEmpty()) {
+                            changed = true;
                             filter.save();
                             break;
                         }
                     }
                 }
             }
+            if (changed)
+                menu.onFilterPopulated();
         }
     }
 
@@ -125,6 +128,11 @@ public class ItemFilter extends ItemStackHandler {
         }
     }
 
+    public void load() {
+        if (this.stack.hasTag())
+            this.deserializeNBT(this.stack.getTag().getCompound("filter"));
+    }
+
     @Override
     public CompoundTag serializeNBT() {
         var nbt = super.serializeNBT();
@@ -155,5 +163,7 @@ public class ItemFilter extends ItemStackHandler {
     public interface IFilteredContainer {
 
         ItemFilter getFilter();
+
+        default void onFilterPopulated() {}
     }
 }

src/main/java/de/ellpeck/prettypipes/packets/PacketButton.java

@@ -99,9 +99,8 @@ public class PacketButton {
             }
         }),
         FILTER_CHANGE((pos, data, player) -> {
-            var container = (IFilteredContainer) player.containerMenu;
+            if (player.containerMenu instanceof IFilteredContainer filtered)
-            var filter = container.getFilter();
+                filtered.getFilter().onButtonPacket(filtered, data[0]);
-            filter.onButtonPacket(data[0]);
         }),
         STACK_SIZE_MODULE_BUTTON((pos, data, player) -> {
             var container = (AbstractPipeContainer<?>) player.containerMenu;

src/main/java/de/ellpeck/prettypipes/pipe/modules/insertion/FilterModuleContainer.java

@@ -6,7 +6,6 @@ import de.ellpeck.prettypipes.pipe.containers.AbstractPipeContainer;
 import net.minecraft.core.BlockPos;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.inventory.MenuType;
-import net.minecraft.world.inventory.Slot;
 
 import javax.annotation.Nullable;
 
@@ -18,6 +17,12 @@ public class FilterModuleContainer extends AbstractPipeContainer<FilterModuleIte
         super(type, id, player, pos, moduleIndex);
     }
 
+    @Override
+    public void onFilterPopulated() {
+        // reload the filter so that it displays correctly on the client
+        this.filter.load();
+    }
+
     @Override
     protected void addSlots() {
         this.filter = this.module.getItemFilter(this.moduleStack, this.tile);