73 lines
2.4 KiB
C#
73 lines
2.4 KiB
C#
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using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine.UI;
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using UnityEngine.EventSystems;
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namespace CurvedUI
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{
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/// <summary>
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/// This component enables accurate object dragging over curved canvas. It supports both mouse and gaze controllers. Add it to your canvas object with image component.
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/// </summary>
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public class CUI_draggable : MonoBehaviour, IBeginDragHandler, IEndDragHandler, IDragHandler
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{
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Vector2 savedVector;
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bool isDragged = false;
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public void OnBeginDrag(PointerEventData data)
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{
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Debug.Log("OnBeginDrag");
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Vector2 newPos = Vector2.zero;
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RaycastPosition(out newPos);
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//save distance from click point to object center to allow for precise dragging
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savedVector = new Vector2((transform as RectTransform).localPosition.x, (transform as RectTransform).localPosition.y) - newPos;
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isDragged = true;
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}
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public void OnDrag(PointerEventData data) { }
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public void OnEndDrag(PointerEventData data)
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{
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Debug.Log("OnEndDrag");
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isDragged = false;
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}
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void LateUpdate()
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{
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if (!isDragged) return;
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Debug.Log("OnDrag");
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//drag the transform along the mouse. We use raycast to determine its position on curved canvas.
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Vector2 newPos = Vector2.zero;
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RaycastPosition(out newPos);
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//add our initial distance from objects center
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(transform as RectTransform).localPosition = newPos + savedVector;
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}
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void RaycastPosition(out Vector2 newPos)
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{
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if (CurvedUIInputModule.ControlMethod == CurvedUIInputModule.CUIControlMethod.MOUSE)
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{
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//position when using mouse
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GetComponentInParent<CurvedUISettings>().RaycastToCanvasSpace(Camera.main.ScreenPointToRay(Input.mousePosition), out newPos);
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}
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else if (CurvedUIInputModule.ControlMethod == CurvedUIInputModule.CUIControlMethod.GAZE)
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{
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//position when using gaze - uses the center of the screen as guiding point.
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GetComponentInParent<CurvedUISettings>().RaycastToCanvasSpace(Camera.main.ScreenPointToRay(new Vector2(Screen.width / 2.0f, Screen.height / 2.0f)), out newPos);
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}
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else newPos = Vector2.zero;
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}
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}
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}
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