이 예시에서는 복합 ListView를 생성하는 방법을 보여줍니다.
예시에서는 캐릭터 리스트를 사용하여 커스텀 에디터 창을 생성합니다.각 캐릭터에는 슬라이더와 컬러 팔레트가 있습니다.슬라이더를 움직이면 팔레트의 컬러가 변경됩니다.
이 예시에서 생성한 완성된 파일은 GitHub 저장소에서 확인할 수 있습니다.
이 가이드는 Unity 에디터, UI 툴킷, C# 스크립팅에 익숙한 개발자용입니다.시작하기 전에 먼저 다음을 숙지하십시오.
이 예시에서는 C# 스크립트에서 목록의 시각적 요소를 빌드합니다.VisualElement
를 상속하는 커스텀 CharacterInfoVisualElement
클래스를 사용하고 커스텀 요소를 CharacterInfo
오브젝트에 바인딩합니다.
임의의 템플릿을 사용하여 Unity 프로젝트를 생성합니다.
프로젝트(Project) 창에서 Editor
라는 폴더를 만듭니다.
Editor
폴더에 다음 콘텐츠가 있는 ListViewExample.cs
라는 C# 스크립트 파일을 생성합니다.
using System;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using UnityEngine.UIElements;
public class ListViewExample :EditorWindow
{
// Gradient used for the HP color indicator.
private Gradient hpGradient;
private GradientColorKey[] hpColorKey;
private GradientAlphaKey[] hpAlphaKey;
// ListView is kept for easy reference.
private ListView listView;
// List of CharacterInfo items, bound to the ListView.
private List<CharacterInfo> items;
[MenuItem("Window/ListView Custom Item")]
public static void OpenWindow()
{
GetWindow<ListViewExample>().Show();
}
private void OnEnable()
{
SetGradient();
// Create and populate the list of CharacterInfo objects.
const int itemCount = 50;
items = new List<CharacterInfo>(itemCount);
for(int i = 1; i <= itemCount; i++)
{
CharacterInfo character = new CharacterInfo {name = $"Character {i}", maxHp = 100};
character.currentHp = character.maxHp;
items.Add(character);
}
// The ListView calls this to add visible items to the scroller.
Func<VisualElement> makeItem = () =>
{
var characterInfoVisualElement = new CharacterInfoVisualElement();
var slider = characterInfoVisualElement.Q<SliderInt>(name:"hp");
slider.RegisterValueChangedCallback(evt =>
{
var hpColor = characterInfoVisualElement.Q<VisualElement>("hpColor");
var i = (int)slider.userData;
var characterInfo = items[i];
characterInfo.currentHp = evt.newValue;
SetHp(slider, hpColor, characterInfo);
});
return characterInfoVisualElement;
};
// The ListView calls this if a new item becomes visible when the item first appears on the screen,
// when a user scrolls, or when the dimensions of the scroller are changed.
Action<VisualElement, int> bindItem = (e, i) => BindItem(e as CharacterInfoVisualElement, i);
// Height used by the ListView to determine the total height of items in the list.
int itemHeight = 55;
// Use the constructor with initial values to create the ListView.
listView = new ListView(items, itemHeight, makeItem, bindItem);
listView.reorderable = false;
listView.style.flexGrow = 1f; // Fills the window, at least until the toggle below.
listView.showBorder = true;
rootVisualElement.Add(listView);
// Add a toggle to switch the reorderable property of the ListView.
var reorderToggle = new Toggle("Reorderable");
reorderToggle.style.marginTop = 10f;
reorderToggle.value = false;
reorderToggle.RegisterValueChangedCallback(evt => listView.reorderable = evt.newValue);
rootVisualElement.Add(reorderToggle);
}
// Sets up the gradient.
private void SetGradient()
{
hpGradient = new Gradient();
// HP at 0%:Red.At 10%:Dark orange.At 40%:Yellow.At 100%:Green.
hpColorKey = new GradientColorKey[4];
hpColorKey[0] = new GradientColorKey(Color.red, 0f);
hpColorKey[1] = new GradientColorKey(new Color(1f, 0.55f, 0f), 0.1f); // Dark orange
hpColorKey[2] = new GradientColorKey(Color.yellow, 0.4f);
hpColorKey[3] = new GradientColorKey(Color.green, 1f);
// Alpha is always full.
hpAlphaKey = new GradientAlphaKey[2];
hpAlphaKey[0] = new GradientAlphaKey(1f, 0f);
hpAlphaKey[1] = new GradientAlphaKey(1f, 1f);
hpGradient.SetKeys(hpColorKey, hpAlphaKey);
}
// Bind the data (characterInfo) to the display (elem).
private void BindItem(CharacterInfoVisualElement elem, int i)
{
var label = elem.Q<Label>(name:"nameLabel");
var slider = elem.Q<SliderInt>(name:"hp");
var hpColor = elem.Q<VisualElement>("hpColor");
slider.userData = i;
CharacterInfo characterInfo = items[i];
label.text = characterInfo.name;
SetHp(slider, hpColor, characterInfo);
}
private void SetHp(SliderInt slider, VisualElement colorIndicator, CharacterInfo characterInfo)
{
slider.highValue = characterInfo.maxHp;
slider.SetValueWithoutNotify(characterInfo.currentHp);
float ratio = (float)characterInfo.currentHp / characterInfo.maxHp;
colorIndicator.style.backgroundColor = hpGradient.Evaluate(ratio);
}
// This class inherits from VisualElement to display and modify data to and from a CharacterInfo.
public class CharacterInfoVisualElement :VisualElement
{
// Use Constructor when the ListView uses makeItem and returns a VisualElement to be
// bound to a CharacterInfo data class.
public CharacterInfoVisualElement()
{
var root = new VisualElement();
// The code below to style the ListView is for demo purpose.It's better to use a USS file
// to style a visual element.
root.style.paddingTop = 3f;
root.style.paddingRight = 0f;
root.style.paddingBottom = 15f;
root.style.paddingLeft = 3f;
root.style.borderBottomColor = Color.gray;
root.style.borderBottomWidth = 1f;
var nameLabel = new Label() {name = "nameLabel"};
nameLabel.style.fontSize = 14f;
var hpContainer = new VisualElement();
hpContainer.style.flexDirection = FlexDirection.Row;
hpContainer.style.paddingLeft = 15f;
hpContainer.style.paddingRight = 15f;
hpContainer.Add(new Label("HP:"));
var hpSlider = new SliderInt {name = "hp", lowValue = 0, highValue = 100};
hpSlider.style.flexGrow = 1f;
hpContainer.Add(hpSlider);
var hpColor = new VisualElement();
hpColor.name = "hpColor";
hpColor.style.height = 15f;
hpColor.style.width = 15f;
hpColor.style.marginRight = 5f;
hpColor.style.marginBottom = 5f;
hpColor.style.marginLeft = 5f;
hpColor.style.backgroundColor = Color.black;
hpContainer.Add(hpColor);
root.Add(nameLabel);
root.Add(hpContainer);
Add(root);
}
}
// Basic data class used for a character, with a name and HP data.Use a list of CharacterInfo as
// a data source for the ListView.The CharacterInfo can be bound to CharacterInfoVisualElement when needed.
[Serializable]
public class CharacterInfo
{
public string name;
public int maxHp;
public int currentHp;
}
}
예시를 확인하려면 메뉴에서 Window > ListView Custom Item을 선택합니다.