107 lines
2.8 KiB
C#
107 lines
2.8 KiB
C#
using UnityEngine;
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using UnityEngine.EventSystems;
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using System.Collections.Generic;
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using Lean.Common;
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namespace Lean.Gui
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{
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/// <summary>This class contains useful data specific to Lean GUI.</summary>
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public static class LeanGui
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{
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public delegate void DraggingDelegate(ref bool dragging);
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public const string ComponentMenuPrefix = "Lean/GUI/Lean ";
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public const string HelpUrlPrefix = "http://carloswilkes.github.io/Documentation/LeanGUI#";
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public static DraggingDelegate OnDraggingCheck;
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// Used by RaycastGui
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private static List<RaycastResult> tempRaycastResults = new List<RaycastResult>(10);
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// Used by RaycastGui
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private static PointerEventData tempPointerEventData;
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// Used by RaycastGui
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private static EventSystem tempEventSystem;
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public static bool IsDragging
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{
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get
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{
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var dragging = false;
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if (OnDraggingCheck != null)
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{
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OnDraggingCheck(ref dragging);
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}
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return dragging;
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}
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}
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/// <summary>This will return all the RaycastResults under the specified screen point using the specified layerMask.
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/// NOTE: The first result (0) will be the top UI element that was first hit.</summary>
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public static List<RaycastResult> RaycastGui(Vector2 screenPosition, LayerMask layerMask)
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{
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tempRaycastResults.Clear();
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var currentEventSystem = EventSystem.current;
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if (currentEventSystem != null)
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{
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// Create point event data for this event system?
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if (currentEventSystem != tempEventSystem)
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{
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tempEventSystem = currentEventSystem;
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if (tempPointerEventData == null)
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{
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tempPointerEventData = new PointerEventData(tempEventSystem);
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}
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else
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{
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tempPointerEventData.Reset();
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}
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}
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// Raycast event system at the specified point
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tempPointerEventData.position = screenPosition;
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currentEventSystem.RaycastAll(tempPointerEventData, tempRaycastResults);
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// Loop through all results and remove any that don't match the layer mask
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if (tempRaycastResults.Count > 0)
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{
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for (var i = tempRaycastResults.Count - 1; i >= 0; i--)
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{
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var raycastResult = tempRaycastResults[i];
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var raycastLayer = 1 << raycastResult.gameObject.layer;
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if ((raycastLayer & layerMask) == 0)
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{
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tempRaycastResults.RemoveAt(i);
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}
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}
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}
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}
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else
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{
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Debug.LogError("Failed to RaycastGui because your scene doesn't have an event system! To add one, go to: GameObject/UI/EventSystem");
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}
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return tempRaycastResults;
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}
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public static bool InvaidViewportPoint(Camera camera, Vector3 point)
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{
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if (point.x < -10.0f) return true;
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if (point.x > 10.0f) return true;
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if (point.y < -10.0f) return true;
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if (point.y > 10.0f) return true;
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if (point.z < camera.nearClipPlane) return true;
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return false;
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}
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}
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} |