139 lines
3.9 KiB
C#
139 lines
3.9 KiB
C#
/// <summary>
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/// Created by SWAN DEV 2018
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/// </summary>
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using System;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.EventSystems;
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/// Dynamic UI - Draggable UI script for UGUI RaycastTarget components(e.g. Image, RawImage, Text). Attach on the UGUI component, set 'RaycastTarget = True'.
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/// (Draggable UI detect the drag area by checking the sizeDelta of the target UI rectTransform, make sure sizeDelta is correctly set. Especially for text.)
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public class DDraggableUI : MonoBehaviour
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{
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/// Indicates if any DDraggableUI object in the scene is being dragged.
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public static bool draggingGlobal{ get; private set; }
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/// The target draggable UGUI component(Image, RawImage, Text, etc).
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[Tooltip("The target draggable UGUI component(Image, RawImage, Text, etc).")]
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public GameObject m_TargetUIObject;
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/// Move this GameObject instead of the (dragged) TargetUIObject if this GameObject is assigned.
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[Tooltip("Move this GameObject instead of the (dragged) TargetUIObject if this GameObject is assigned.")]
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public GameObject m_MoveUIObject = null;
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/// Lock position change along X-axis.
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[Tooltip("Lock position change along X-axis.")]
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public bool m_LockX = false;
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/// Lock position change along Y-axis.
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[Tooltip("Lock position change along Y-axis.")]
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public bool m_LockY = false;
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/// Indicates if m_TargetUIObject is being dragged.
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public bool dragging{ get; private set; }
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private Action _onDragStart = null;
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public void SetOnDragStartCallback(Action onDragStartAction)
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{
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_onDragStart = onDragStartAction;
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}
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private Action _onDragComplete = null;
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public void SetOnDragCompleteCallback(Action onDragCompleteAction)
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{
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_onDragComplete = onDragCompleteAction;
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}
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bool isTouchDown = false;
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bool isTouchUp = true;
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float diffX = 0f, diffY = 0f;
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PointerEventData cursor = new PointerEventData(EventSystem.current);
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List<RaycastResult> objectsHit = new List<RaycastResult>();
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void OnEnable()
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{
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if(m_TargetUIObject == null) m_TargetUIObject = gameObject;
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if(m_MoveUIObject == null) m_MoveUIObject = m_TargetUIObject;
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dragging = false;
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isTouchUp = true;
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}
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void OnDisable()
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{
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draggingGlobal = false;
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dragging = false;
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}
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void Update()
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{
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if(isTouchUp)
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{
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isTouchDown = SDev.Util.UnifyInputUtil.WasTouchOrMousePressed();
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if (isTouchDown)
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{
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//A mouse/touch down event detected.
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isTouchUp = false;
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cursor.position = SDev.Util.UnifyInputUtil.GetCursorPosition();
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EventSystem.current.RaycastAll(cursor, objectsHit);
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if(objectsHit.Count > 0)
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{
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if(objectsHit[0].gameObject.Equals(m_TargetUIObject))
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{
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dragging = true;
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diffX = m_MoveUIObject.transform.position.x - cursor.position.x;
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diffY = m_MoveUIObject.transform.position.y - cursor.position.y;
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if(_onDragStart != null) _onDragStart();
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}
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}
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}
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}
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else if(isTouchDown)
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{
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isTouchUp = SDev.Util.UnifyInputUtil.WasTouchOrMouseReleased();
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if (isTouchUp)
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{
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//A mouse/touch up event detected.
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isTouchDown = false;
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dragging = false;
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draggingGlobal = false;
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if(_onDragComplete != null) _onDragComplete();
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}
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}
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if(dragging)
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{
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draggingGlobal = true;
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cursor.position = SDev.Util.UnifyInputUtil.GetCursorPosition();
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m_MoveUIObject.transform.position = new Vector3((m_LockX? m_MoveUIObject.transform.position.x : cursor.position.x + diffX),
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(m_LockY? m_MoveUIObject.transform.position.y : cursor.position.y + diffY), m_MoveUIObject.transform.position.z);
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}
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}
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public static void SetDraggable(GameObject targetUIObject, bool isDraggable)
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{
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if(isDraggable)
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{
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if(targetUIObject.GetComponent<DDraggableUI>() == null)
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{
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targetUIObject.AddComponent<DDraggableUI>();
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}
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}
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else
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{
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if(targetUIObject.GetComponent<DDraggableUI>() != null)
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{
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Destroy(targetUIObject.GetComponent<DDraggableUI>());
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}
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}
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}
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} |