Add scrolling

1 files changed, 29 insertions, 8 deletions

diff --git a/src/main/java/moe/nea/funnyteleporters/TeleporterNexusScreen.java b/src/main/java/moe/nea/funnyteleporters/TeleporterNexusScreen.java
index 1413519..4a9088e 100644
--- a/src/main/java/moe/nea/funnyteleporters/TeleporterNexusScreen.java
+++ b/src/main/java/moe/nea/funnyteleporters/TeleporterNexusScreen.java
@@ -6,6 +6,7 @@ import eu.pb4.sgui.api.elements.GuiElementBuilderInterface;
 import eu.pb4.sgui.api.gui.SimpleGui;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.Items;
 import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.screen.ScreenHandlerType;
 import net.minecraft.server.network.ServerPlayerEntity;
@@ -25,12 +26,20 @@ public class TeleporterNexusScreen extends SimpleGui {
 		setTitle(Text.literal("Teleport Nexus"));
 	}
 
+	int scroll = 0;
+
 	void setSlots() {
 		for (int i = 0; i < 9; i++) {
 			setSlot(i, Utils.createBlankBlack());
 			setSlot(i + (height - 1) * width, Utils.createBlankBlack());
 		}
+		if (scroll > 0) {
+			setSlot(0, GuiElementBuilder.from(new ItemStack(Items.ARROW))
+			                            .setName(Text.literal("Previous page"))
+			                            .setCallback(() -> scroll(-1)));
+		}
 		var it = blockEntity.destinations.entrySet().iterator();
+		Utils.skipIt(it, scroll * width * (height - 2));
 		for (int i = 1; i < height - 1 && it.hasNext(); i++) {
 			for (int j = 0; j < width && it.hasNext(); j++) {
 				int index = i * width + j;
@@ -38,6 +47,25 @@ public class TeleporterNexusScreen extends SimpleGui {
 				setSlot(index, getHandlerForEntry(entry));
 			}
 		}
+		if (it.hasNext()) {
+			setSlot(1, GuiElementBuilder.from(new ItemStack(Items.ARROW))
+			                            .setName(Text.literal("Next page"))
+			                            .setCallback(() -> scroll(1)));
+		}
+	}
+
+	void scroll(int offset) {
+		scroll = Math.max(0, scroll + offset);
+		setSlots();
+	}
+
+	void handleClick(ClickType clickType, TeleporterDestination destination) {
+		if (clickType == ClickType.MOUSE_RIGHT) {
+			new TeleporterNexusEditorScreen(blockEntity, destination, player).open();
+			return;
+		}
+		destination.teleport(player);
+		close();
 	}
 
 	private GuiElementBuilderInterface<?> getHandlerForEntry(Map.Entry<TeleporterDestination, TeleporterNexusBlockEntity.Label> entry) {
@@ -52,13 +80,6 @@ public class TeleporterNexusScreen extends SimpleGui {
 		                        .addLoreLine(Text.empty())
 		                        .addLoreLine(Text.literal("Left-Click to teleport.").setStyle(Style.EMPTY.withItalic(false).withColor(Formatting.GRAY)))
 		                        .addLoreLine(Text.literal("Right-Click to edit item.").setStyle(Style.EMPTY.withItalic(false).withColor(Formatting.GRAY)))
-		                        .setCallback((clickType) -> {
-			                        if (clickType == ClickType.MOUSE_RIGHT) {
-				                        new TeleporterNexusEditorScreen(blockEntity, dest, player).open();
-				                        return;
-			                        }
-			                        dest.teleport(player);
-			                        close();
-		                        });
+		                        .setCallback(clickType -> handleClick(clickType, dest));
 	}
 }