Add convenience methods and make scrolling grids of ingredients much easier to create

Author: mezz

Common/src/main/java/mezz/jei/common/gui/elements/OffsetDrawable.java

@@ -2,6 +2,7 @@
 
 import mezz.jei.api.gui.drawable.IDrawable;
 import mezz.jei.api.gui.placement.IPlaceable;
+import mezz.jei.common.util.ImmutableRect2i;
 import net.minecraft.client.gui.GuiGraphics;
 
 /**
@@ -55,4 +56,8 @@ public OffsetDrawable setPosition(int xPos, int yPos) {
 		this.yOffset = yPos;
 		return this;
 	}
+
+	public ImmutableRect2i getArea() {
+		return new ImmutableRect2i(xOffset, yOffset, getWidth(), getHeight());
+	}
 }

Common/src/main/java/mezz/jei/common/util/ImmutablePoint2i.java

@@ -1,3 +1,5 @@
 package mezz.jei.common.util;
 
-public record ImmutablePoint2i(int x, int y) {}
+public record ImmutablePoint2i(int x, int y) {
+	public static final ImmutablePoint2i ORIGIN = new ImmutablePoint2i(0, 0);
+}

Common/src/main/java/mezz/jei/common/util/MathUtil.java

@@ -112,9 +112,9 @@ public static double distance(Vec2 start, Vec2 end) {
 	 * Illegal matrix math assumes the pose is only scaling and translation.
 	 * If we get rotating GUI elements we're doomed, I hope nobody wants those.
 	 */
-	public static ScreenRectangle transform(ScreenRectangle rect, Matrix4f pose) {
-		Vector3f topLeft = new Vector3f(rect.left(), rect.top(), 1.0f);
-		Vector3f bottomRight = new Vector3f(rect.right(), rect.bottom(), 1.0f);
+	public static ScreenRectangle transform(ImmutableRect2i rect, Matrix4f pose) {
+		Vector3f topLeft = new Vector3f(rect.x(), rect.y(), 1.0f);
+		Vector3f bottomRight = new Vector3f(rect.x() + rect.width(), rect.y() + rect.getHeight(), 1.0f);
 
 		topLeft = pose.transformPosition(topLeft);
 		bottomRight = pose.transformPosition(bottomRight);

CommonApi/src/main/java/mezz/jei/api/gui/builder/IRecipeLayoutBuilder.java

@@ -1,7 +1,7 @@
 package mezz.jei.api.gui.builder;
 
 import mezz.jei.api.gui.placement.IPlaceable;
-import mezz.jei.api.gui.widgets.ISlottedWidgetFactory;
+import mezz.jei.api.gui.widgets.IRecipeExtrasBuilder;
 import mezz.jei.api.recipe.IFocusGroup;
 import mezz.jei.api.recipe.RecipeIngredientRole;
 import mezz.jei.api.recipe.category.IRecipeCategory;
@@ -29,6 +29,18 @@ default IRecipeSlotBuilder addInputSlot(int x, int y) {
 			.setPosition(x, y);
 	}
 
+	/**
+	 * Convenience function to add an input slot.
+	 * Set its position using {@link IPlaceable} methods on {@link IRecipeSlotBuilder}.
+	 *
+	 * @return a {@link IRecipeSlotBuilder} that has further methods for adding ingredients, setting position, etc.
+	 *
+	 * @since 15.20.3
+	 */
+	default IRecipeSlotBuilder addInputSlot() {
+		return addSlot(RecipeIngredientRole.INPUT);
+	}
+
 	/**
 	 * Convenience function to add an output slot that will be drawn at the given position relative to the recipe layout.
 	 *
@@ -43,6 +55,18 @@ default IRecipeSlotBuilder addOutputSlot(int x, int y) {
 			.setPosition(x, y);
 	}
 
+	/**
+	 * Convenience function to add an output slot.
+	 * Set its position using {@link IPlaceable} methods on {@link IRecipeSlotBuilder}.
+	 *
+	 * @return a {@link IRecipeSlotBuilder} that has further methods for adding ingredients, setting position, etc.
+	 *
+	 * @since 15.20.3
+	 */
+	default IRecipeSlotBuilder addOutputSlot() {
+		return addSlot(RecipeIngredientRole.OUTPUT);
+	}
+
 	/**
 	 * Add a slot that will be drawn at the given position relative to the recipe layout.
 	 *
@@ -59,7 +83,7 @@ default IRecipeSlotBuilder addSlot(RecipeIngredientRole role, int x, int y) {
 	}
 
 	/**
-	 * Add a slot and set its position using {@link IPlaceable} methods.
+	 * Add a slot and set its position using {@link IPlaceable} methods on {@link IRecipeSlotBuilder}.
 	 *
 	 * @param role the {@link RecipeIngredientRole} of this slot (for lookups).
 	 * @return a {@link IRecipeSlotBuilder} that has further methods for adding ingredients, etc.
@@ -69,14 +93,17 @@ default IRecipeSlotBuilder addSlot(RecipeIngredientRole role, int x, int y) {
 	IRecipeSlotBuilder addSlot(RecipeIngredientRole role);
 
 	/**
-	 * Assign this slot to a {@link ISlottedWidgetFactory},
+	 * Assign this slot to a {@link mezz.jei.api.gui.widgets.ISlottedWidgetFactory},
 	 * so that the widget can manage this slot instead the recipe category.
 	 *
-	 * @param widgetFactory the {@link ISlottedWidgetFactory} to assign this slot to.
+	 * @param widgetFactory the {@link mezz.jei.api.gui.widgets.ISlottedWidgetFactory} to assign this slot to.
 	 *
 	 * @since 15.10.0
+	 * @deprecated there are easier ways to create slotted widgets now. Use {@link IRecipeExtrasBuilder#addSlottedWidget}.
 	 */
-	IRecipeSlotBuilder addSlotToWidget(RecipeIngredientRole role, ISlottedWidgetFactory<?> widgetFactory);
+	@Deprecated(since = "15.20.3", forRemoval = true)
+	@SuppressWarnings("removal")
+	IRecipeSlotBuilder addSlotToWidget(RecipeIngredientRole role, mezz.jei.api.gui.widgets.ISlottedWidgetFactory<?> widgetFactory);
 
 	/**
 	 * Add ingredients that are important for recipe lookup, but are not displayed on the recipe layout.

CommonApi/src/main/java/mezz/jei/api/gui/ingredient/IRecipeSlotDrawable.java

@@ -107,4 +107,12 @@ public interface IRecipeSlotDrawable extends IRecipeSlotView {
 	default void addTooltipCallback(IRecipeSlotTooltipCallback tooltipCallback) {
 
 	}
+
+	/**
+	 * Get the area that this recipe slot draws on, including the area covered by its background texture.
+	 * Useful for laying out other recipe elements relative to the slot.
+	 *
+	 * @since 15.20.3
+	 */
+	Rect2i getAreaIncludingBackground();
 }

CommonApi/src/main/java/mezz/jei/api/gui/ingredient/IRecipeSlotDrawablesView.java

@@ -0,0 +1,58 @@
+package mezz.jei.api.gui.ingredient;
+
+import mezz.jei.api.gui.builder.IRecipeSlotBuilder;
+import mezz.jei.api.recipe.RecipeIngredientRole;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Represents all the drawn ingredients in slots that are part of a recipe.
+ *
+ * This view is meant as a source of information for drawing, positioning, and tooltips.
+ *
+ * @see IRecipeSlotsView for a view with less access to drawable properties of the slots.
+ *
+ * @since 15.20.3
+ */
+public interface IRecipeSlotDrawablesView {
+	/**
+	 * Get all slots for a recipe.
+	 *
+	 * @since 15.20.3
+	 */
+	@Unmodifiable
+	List<IRecipeSlotDrawable> getSlots();
+
+	/**
+	 * Get the list of slots for the given {@link RecipeIngredientRole} for a recipe.
+	 *
+	 * @since 15.20.3
+	 */
+	default List<IRecipeSlotDrawable> getSlots(RecipeIngredientRole role) {
+		List<IRecipeSlotDrawable> list = new ArrayList<>();
+		for (IRecipeSlotDrawable slotView : getSlots()) {
+			if (slotView.getRole() == role) {
+				list.add(slotView);
+			}
+		}
+		return list;
+	}
+
+	/**
+	 * Get a recipe slot by its name set with {@link IRecipeSlotBuilder#setSlotName(String)}.
+	 *
+	 * @since 15.20.3
+	 */
+	default Optional<IRecipeSlotDrawable> findSlotByName(String slotName) {
+		return getSlots().stream()
+			.filter(slot ->
+				slot.getSlotName()
+					.map(slotName::equals)
+					.orElse(false)
+			)
+			.findFirst();
+	}
+}

CommonApi/src/main/java/mezz/jei/api/gui/widgets/IRecipeExtrasBuilder.java

@@ -1,6 +1,8 @@
 package mezz.jei.api.gui.widgets;
 
 import mezz.jei.api.gui.drawable.IDrawable;
+import mezz.jei.api.gui.ingredient.IRecipeSlotDrawable;
+import mezz.jei.api.gui.ingredient.IRecipeSlotDrawablesView;
 import mezz.jei.api.gui.inputs.IJeiGuiEventListener;
 import mezz.jei.api.gui.inputs.IJeiInputHandler;
 import mezz.jei.api.gui.placement.IPlaceable;
@@ -26,8 +28,16 @@
  * @since 15.9.0
  */
 public interface IRecipeExtrasBuilder {
+
+	/**
+	 * Get the recipe slots that were created in {@link IRecipeCategory#setRecipe}.
+	 *
+	 * @since 15.20.3
+	 */
+	IRecipeSlotDrawablesView getRecipeSlots();
+
 	/**
-	 * Add a {@link IDrawable} for the recipe category.
+	 * Add a {@link IDrawable} for the recipe category at the given position.
 	 *
 	 * @since 15.20.0
 	 */
@@ -47,6 +57,14 @@ public interface IRecipeExtrasBuilder {
 	 */
 	void addWidget(IRecipeWidget widget);
 
+	/**
+	 * Add a {@link ISlottedRecipeWidget} for the recipe category, and
+	 * mark that the slots are going to be handled by the slotted widget.
+	 *
+	 * @since 15.20.3
+	 */
+	void addSlottedWidget(ISlottedRecipeWidget widget, List<IRecipeSlotDrawable> slots);
+
 	/**
 	 * Add a {@link IJeiInputHandler} for the recipe category.
 	 *
@@ -71,6 +89,18 @@ public interface IRecipeExtrasBuilder {
 	 */
 	IScrollBoxWidget addScrollBoxWidget(int width, int height, int xPos, int yPos);
 
+	/**
+	 * Create and add a new scroll grid widget.
+	 * Handles displaying ingredients in a scrolling area with a scrollbar, similar to the vanilla creative menu.
+	 *
+	 * Get slots for this from {@link #getRecipeSlots()}.
+	 *
+	 * You can move the resulting grid by using the {@link IScrollGridWidget}'s {@link IPlaceable} methods.
+	 *
+	 * @since 15.20.3
+	 */
+	IScrollGridWidget addScrollGridWidget(List<IRecipeSlotDrawable> slots, int columns, int visibleRows);
+
 	/**
 	 * Add a vanilla-style recipe arrow to the recipe layout.
 	 *

CommonApi/src/main/java/mezz/jei/api/gui/widgets/IScrollGridWidget.java

@@ -0,0 +1,20 @@
+package mezz.jei.api.gui.widgets;
+
+import mezz.jei.api.gui.placement.IPlaceable;
+import net.minecraft.client.gui.navigation.ScreenRectangle;
+
+/**
+ * A scrolling area for ingredients with a scrollbar.
+ * Modeled after the vanilla creative menu.
+ *
+ * Create one with {@link IRecipeExtrasBuilder#addScrollGridWidget}.
+ * @since 15.20.3
+ */
+public interface IScrollGridWidget extends ISlottedRecipeWidget, IPlaceable<IScrollGridWidget> {
+	/**
+	 * Get the position and size of this widget, relative to its parent element.
+	 *
+	 * @since 15.20.3
+	 */
+	ScreenRectangle getScreenRectangle();
+}

CommonApi/src/main/java/mezz/jei/api/gui/widgets/IScrollGridWidgetFactory.java

@@ -9,7 +9,10 @@
  * Get an instance from {@link IGuiHelper#createScrollGridFactory(int, int)}
  *
  * @since 15.10.0
+ * @deprecated use {@link IRecipeExtrasBuilder#addScrollGridWidget} instead, it's much simpler
  */
+@SuppressWarnings({"DeprecatedIsStillUsed", "removal"})
+@Deprecated(since = "15.20.3", forRemoval = true)
 public interface IScrollGridWidgetFactory<R> extends ISlottedWidgetFactory<R> {
 	/**
 	 * @since 15.10.0

CommonApi/src/main/java/mezz/jei/api/gui/widgets/ISlottedRecipeWidget.java

@@ -1,20 +1,15 @@
 package mezz.jei.api.gui.widgets;
 
-import mezz.jei.api.gui.builder.IRecipeLayoutBuilder;
 import mezz.jei.api.gui.ingredient.IRecipeSlotDrawable;
 import mezz.jei.api.gui.inputs.RecipeSlotUnderMouse;
-import mezz.jei.api.recipe.category.IRecipeCategory;
 
+import java.util.List;
 import java.util.Optional;
 
 /**
  * Like {@link IRecipeWidget}, but it also manages {@link IRecipeSlotDrawable}s.
  *
- * These must be created by an {@link ISlottedWidgetFactory}.
- * Pass the factory to {@link IRecipeLayoutBuilder#addSlotToWidget}
- * when creating slots in {@link IRecipeCategory#setRecipe}
- *
- * Once the slots are built, the factory will be called to create your complete {@link ISlottedRecipeWidget}.
+ * Add one to a recipe category by using {@link IRecipeExtrasBuilder#addSlottedWidget(ISlottedRecipeWidget, List)}
  *
  * @since 15.10.0
  */