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132 lines
3.5 KiB
132 lines
3.5 KiB
1 year ago
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// This code is part of the Fungus library (https://github.com/snozbot/fungus)
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// It is released for free under the MIT open source license (https://github.com/snozbot/fungus/blob/master/LICENSE)
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using UnityEngine;
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using UnityEngine.EventSystems;
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namespace Fungus
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{
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/// <summary>
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/// Detects mouse clicks and touches on a Game Object, and sends an event to all Flowchart event handlers in the scene.
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/// The Game Object must have a Collider or Collider2D component attached.
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/// Use in conjunction with the ObjectClicked Flowchart event handler.
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/// </summary>
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public class Clickable2D : MonoBehaviour, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler
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{
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[Tooltip("Is object clicking enabled")]
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[SerializeField] protected bool clickEnabled = true;
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[Tooltip("Mouse texture to use when hovering mouse over object")]
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[SerializeField] protected Texture2D hoverCursor;
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[Tooltip("Use the UI Event System to check for clicks. Clicks that hit an overlapping UI object will be ignored. Camera must have a PhysicsRaycaster component, or a Physics2DRaycaster for 2D colliders.")]
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[SerializeField] protected bool useEventSystem;
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protected virtual void ChangeCursor(Texture2D cursorTexture)
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{
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if (!clickEnabled)
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{
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return;
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}
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Cursor.SetCursor(cursorTexture, Vector2.zero, CursorMode.Auto);
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}
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protected virtual void DoPointerClick()
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{
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if (!clickEnabled)
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{
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return;
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}
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var eventDispatcher = FungusManager.Instance.EventDispatcher;
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eventDispatcher.Raise(new ObjectClicked.ObjectClickedEvent(this));
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}
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protected virtual void DoPointerEnter()
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{
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ChangeCursor(hoverCursor);
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}
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protected virtual void DoPointerExit()
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{
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// Always reset the mouse cursor to be on the safe side
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SetMouseCursor.ResetMouseCursor();
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}
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#region Legacy OnMouseX methods
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protected virtual void OnMouseDown()
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{
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if (!useEventSystem)
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{
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DoPointerClick();
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}
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}
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protected virtual void OnMouseEnter()
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{
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if (!useEventSystem)
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{
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DoPointerEnter();
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}
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}
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protected virtual void OnMouseExit()
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{
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if (!useEventSystem)
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{
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DoPointerExit();
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}
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}
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#endregion
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#region Public members
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/// <summary>
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/// Is object clicking enabled.
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/// </summary>
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public bool ClickEnabled { set { clickEnabled = value; } }
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#endregion
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#region IPointerClickHandler implementation
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public void OnPointerClick(PointerEventData eventData)
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{
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if (useEventSystem)
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{
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DoPointerClick();
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}
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}
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#endregion
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#region IPointerEnterHandler implementation
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public void OnPointerEnter(PointerEventData eventData)
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{
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if (useEventSystem)
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{
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DoPointerEnter();
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}
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}
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#endregion
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#region IPointerExitHandler implementation
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public void OnPointerExit(PointerEventData eventData)
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{
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if (useEventSystem)
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{
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DoPointerExit();
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}
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}
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#endregion
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}
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}
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