69 lines
1.7 KiB
C#
69 lines
1.7 KiB
C#
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using UnityEngine;
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using UnityEngine.UI;
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using Lean.Common;
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namespace Lean.Gui
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{
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/// <summary>This component allows you to change a UI element's hitbox to use its graphic Image opacity/alpha.</summary>
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[ExecuteInEditMode]
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[RequireComponent(typeof(Image))]
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[HelpURL(LeanGui.HelpUrlPrefix + "LeanHitbox")]
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[AddComponentMenu(LeanGui.ComponentMenuPrefix + "Hitbox")]
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public class LeanHitbox : MonoBehaviour
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{
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/// <summary>The alpha threshold specifies the minimum alpha a pixel must have for the event to be considered a "hit" on the Image.</summary>
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public float Threshold { set { threshold = value; UpdateThreshold(); } get { return threshold; } } [SerializeField] private float threshold = 0.5f;
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[System.NonSerialized]
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private Image cachedImage;
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[System.NonSerialized]
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private bool cachedImageSet;
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public Image CachedImage
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{
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get
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{
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if (cachedImageSet == false)
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{
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cachedImage = GetComponent<Image>();
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cachedImageSet = true;
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}
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return cachedImage;
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}
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}
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public void UpdateThreshold()
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{
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CachedImage.alphaHitTestMinimumThreshold = threshold;
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}
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protected virtual void Start()
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{
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UpdateThreshold();
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}
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}
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}
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#if UNITY_EDITOR
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namespace Lean.Gui.Editor
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{
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using TARGET = LeanHitbox;
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[UnityEditor.CanEditMultipleObjects]
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[UnityEditor.CustomEditor(typeof(TARGET))]
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public class LeanHitbox_Editor : LeanEditor
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{
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protected override void OnInspector()
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{
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TARGET tgt; TARGET[] tgts; GetTargets(out tgt, out tgts);
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if (Draw("threshold", "The alpha threshold specifies the minimum alpha a pixel must have for the event to be considered a 'hit' on the Image.") == true)
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{
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Each(tgts, t => t.UpdateThreshold(), true);
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}
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}
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}
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}
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#endif
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