NestedInteractionKind

Параметры для управления тем, как вложенные ScrollView обрабатывают прокрутку при достижении пределов области прокрутки.

Этот Enum имеет значение только при использовании для ScrollView, который вложен внутри другого ScrollView.

Следующий пример показывает, как с помощью перечисления NestedInteractionKind управлять поведением вложенного ScrollView.

using System;
using UnityEngine;
using UnityEngine.UIElements;

[RequireComponent(typeof(UIDocument))]
public class ScrollView_NestedInteraction_Example : MonoBehaviour
{
    // To use this example in runtime, add a UIDocument component to your Scene and attach a UXML file to the UIDocument component.
    // The UXML file can be empty.
    public UIDocument uiDocument;
    public int numberOfPotions = 10;

    Label[] labels;
    string[] otherItems = { "Shield", "Sword", "Helmet", "Boots", "Gloves" };

    void Start()
    {
        // Inner ScrollView for the list of potions.
        var potionInventoryScrollView = new ScrollView { name = "MyPotionsInventory" };
        potionInventoryScrollView.style.height = 200;
        var potionsInventoryColor = new Color(0.65f, 0.3f, 0.2f, 1f);

        // Outer ScrollView for the entire inventory, which includes the inner ScrollView.
        var fullInventoryScrollView = new ScrollView { name = "MyFullInventory" };
        fullInventoryScrollView.style.height = 250;
        var fullInventoryColor = new Color(0.2f, 0.3f, 0.65f, 1f);

        // Create a toggle to use NestedInteractionKind.StopScrolling instead of NestedInteractionKind.ForwardScrolling,
        // which is the default behavior for scroll wheel input.
        var toggle = new Toggle("Potions ScrollView: Use NestedInteractionKind.StopScrolling instead of NestedInteractionKind.ForwardScrolling");
        toggle.RegisterValueChangedCallback( (evt =>
                potionInventoryScrollView.nestedInteractionKind = evt.newValue ? ScrollView.NestedInteractionKind.StopScrolling : ScrollView.NestedInteractionKind.ForwardScrolling
                ));

        // Create a list of labels representing potions.
        labels = new Label[numberOfPotions];
        for (int i = 0; i < numberOfPotions; i++)
        {
            var label = new Label { text = " Unnamed Potion #" + (i) };
            label.style.backgroundColor = potionsInventoryColor;
            potionInventoryScrollView.Add(label);
        }

        var potionsInventoryTitle = new Label { text = "Potions Inventory" };
        potionsInventoryTitle.style.unityFontStyleAndWeight = FontStyle.Bold;
        potionsInventoryTitle.style.fontSize = 20;
        potionsInventoryTitle.style.color = potionsInventoryColor;
        potionsInventoryTitle.style.unityTextAlign = TextAnchor.MiddleCenter;

        var fullInventoryTitle = new Label { text = "Full Inventory" };
        fullInventoryTitle.style.unityFontStyleAndWeight = FontStyle.Bold;
        fullInventoryTitle.style.fontSize = 25;
        fullInventoryTitle.style.color = fullInventoryColor;
        fullInventoryTitle.style.unityTextAlign = TextAnchor.MiddleCenter;

        fullInventoryScrollView.Add(potionsInventoryTitle);
        fullInventoryScrollView.Add(potionInventoryScrollView);

        // Create a list of labels representing other items.
        foreach (var item in otherItems)
        {
            var label = new Label { text = item };
            label.style.backgroundColor = fullInventoryColor;
            fullInventoryScrollView.Add(label);
        }

        uiDocument.rootVisualElement.Add(toggle);
        uiDocument.rootVisualElement.Add(fullInventoryTitle);
        uiDocument.rootVisualElement.Add(fullInventoryScrollView);
    }
}