Gameplay Ingredients是一组用于 Unity 游戏的运行时和编辑器工具:一组脚本的集合,可在制作游戏和原型时简化简单的任务。
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153 行
6.1 KiB

using UnityEngine;
using UnityEditor;
using UnityEditorInternal;
using System.Linq;
namespace GameplayIngredients.Editor
{
public class CallableReorderableList : ReorderableList
{
public CallableReorderableList(SerializedObject targetObject, SerializedProperty listProperty)
: base(targetObject, listProperty, true, true, true, true)
{
onAddDropdownCallback = AddDropdown;
drawHeaderCallback = DrawHeader;
drawElementCallback = DrawElement;
}
void DrawHeader(Rect r)
{
GUI.Label(r, new GUIContent($" {serializedProperty.displayName}", Styles.callableIcon), EditorStyles.boldLabel);
HandleDrop(r, this);
}
void HandleDrop(Rect rect, CallableReorderableList list)
{
var currentEvent = Event.current;
var usedEvent = false;
switch (currentEvent.type)
{
case EventType.DragExited:
if (GUI.enabled)
HandleUtility.Repaint();
break;
case EventType.DragUpdated:
case EventType.DragPerform:
if (rect.Contains(currentEvent.mousePosition) && GUI.enabled)
{
bool acceptAtLeastOne = false;
Object[] droppedObjects = DragAndDrop.objectReferences;
foreach (Object obj in droppedObjects)
{
if(obj != null && obj is GameObject)
{
DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
if (currentEvent.type == EventType.DragPerform)
{
GenericMenu m = new GenericMenu();
var callables = (obj as GameObject).GetComponents<Callable>();
foreach(var c in callables)
{
m.AddItem(new GUIContent($"{c.Name} ({c.GetType().Name})"), false, () => {
list.serializedProperty.serializedObject.Update();
list.serializedProperty.arraySize++;
int arrayEnd = list.serializedProperty.arraySize - 1;
list.serializedProperty.GetArrayElementAtIndex(arrayEnd).objectReferenceValue = c;
list.serializedProperty.serializedObject.ApplyModifiedProperties();
});
}
m.ShowAsContext();
acceptAtLeastOne = true;
}
}
else if (obj != null && obj is Callable)
{
DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
if (currentEvent.type == EventType.DragPerform)
{
list.serializedProperty.arraySize++;
int arrayEnd = list.serializedProperty.arraySize - 1;
list.serializedProperty.GetArrayElementAtIndex(arrayEnd).objectReferenceValue = obj as Callable;
acceptAtLeastOne = true;
}
}
}
if (acceptAtLeastOne)
{
GUI.changed = true;
DragAndDrop.AcceptDrag();
usedEvent = true;
}
}
break;
}
if (usedEvent)
currentEvent.Use();
}
void DrawElement(Rect r, int index, bool isActive, bool isFocused)
{
SerializedProperty element = serializedProperty.GetArrayElementAtIndex(index);
r.y += 2.0f;
r.x += 4.0f;
r.width -= 4.0f;
EditorGUI.PropertyField(new Rect(r.x, r.y, r.width, EditorGUIUtility.singleLineHeight), element, true);
}
public void AddDropdown(Rect buttonRect, ReorderableList list)
{
var component = list.serializedProperty.serializedObject.targetObject as Component;
var gameObject = component.gameObject;
var propertyName = list.serializedProperty.name;
var provider = new CallableProvider(
gameObject,
component,
propertyName
); ;
BrowsePopup.Show(buttonRect.position, provider);
}
static class Styles
{
public static Texture2D callableIcon = AssetDatabase.LoadAssetAtPath<Texture2D>("Packages/net.peeweek.gameplay-ingredients/Icons/Misc/ic-callable.png");
}
}
public static class CallableExtensions
{
public static void AddCallable(this GameObject gameObject, Component component, string propertyName, System.Type t)
{
var field = component.GetType().GetFields().Where(f => f.Name == propertyName).FirstOrDefault();
var val = field.GetValue(component) as Callable[];
if (t != null && typeof(Callable).IsAssignableFrom(t))
{
var newCmp = Undo.AddComponent(gameObject, t);
field.SetValue(component, val.Append(newCmp as Callable));
}
else
field.SetValue(component, val.Append(null));
}
static T[] Append<T>(this T[] array, T item)
{
if (array == null)
{
return new T[] { item };
}
T[] result = new T[array.Length + 1];
array.CopyTo(result, 0);
result[array.Length] = item;
return result;
}
}
}