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45 lines
1.5 KiB
C#
45 lines
1.5 KiB
C#
3 weeks ago
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using System;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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namespace Unity.BossRoom.Gameplay.UI
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{
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/// <summary>
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/// Provides logic for a UI HUD Button to slightly shrink scale on pointer down.
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/// Also has an optional code interface for receiving notifications about down/up events (instead of just on-click)
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/// </summary>
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public class UIHUDButton : Button, IPointerDownHandler, IPointerUpHandler
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{
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// We apply a uniform 95% scale to buttons when pressed
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static readonly Vector3 k_DownScale = new Vector3(0.95f, 0.95f, 0.95f);
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/// <summary>
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/// Called when the user clicks down on the button (but hasn't released the button yet)
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/// </summary>
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public Action OnPointerDownEvent;
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/// <summary>
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/// Called when the user clicks up on the button (completing a click event)
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/// </summary>
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public Action OnPointerUpEvent;
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public override void OnPointerDown(PointerEventData eventData)
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{
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if (!IsInteractable()) { return; }
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base.OnPointerDown(eventData);
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transform.localScale = k_DownScale;
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OnPointerDownEvent?.Invoke();
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}
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public override void OnPointerUp(PointerEventData eventData)
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{
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if (!IsInteractable()) { return; }
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base.OnPointerUp(eventData);
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transform.localScale = Vector3.one;
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OnPointerUpEvent?.Invoke();
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}
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}
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}
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