206 lines
8.1 KiB
C#
206 lines
8.1 KiB
C#
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using UnityEngine;
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using UnityEngine.Events;
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using UnityEngine.EventSystems;
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using Lean.Transition;
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using Lean.Common;
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namespace Lean.Gui
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{
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/// <summary>This component will place the current RectTransform above the currently selected object.</summary>
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[RequireComponent(typeof(RectTransform))]
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[HelpURL(LeanGui.HelpUrlPrefix + "LeanSelectionHighlight")]
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[AddComponentMenu(LeanGui.ComponentMenuPrefix + "Selection Highlight")]
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public class LeanSelectionHighlight : MonoBehaviour
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{
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/// <summary>The camera rendering the target transform/position.
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/// None = MainCamera.</summary>
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public Camera WorldCamera { set { worldCamera = value; } get { return worldCamera; } } [SerializeField] private Camera worldCamera;
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/// <summary>This allows you to perform a transition when the highlight begins.
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/// You can create a new transition GameObject by right clicking the transition name, and selecting <b>Create</b>.
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/// For example, the <b>Graphic.color Transition (LeanGraphicColor)</b> component can be used to change the color.
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/// NOTE: Any transitions you perform here must be reverted in the <b>Hide Transitions</b> setting using a matching transition component.</summary>
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public LeanPlayer ShowTransitions { get { if (showTransitions == null) showTransitions = new LeanPlayer(); return showTransitions; } } [SerializeField] private LeanPlayer showTransitions;
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/// <summary>This allows you to perform a transition when the highlight ends.
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/// You can create a new transition GameObject by right clicking the transition name, and selecting <b>Create</b>.
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/// For example, the <b>Graphic.color Transition (LeanGraphicColor)</b> component can be used to change the color.
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/// NOTE: Any transitions you perform here must be reverted in the <b>Show Transitions</b> setting using a matching transition component.</summary>
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public LeanPlayer HideTransitions { get { if (hideTransitions == null) hideTransitions = new LeanPlayer(); return hideTransitions; } } [SerializeField] private LeanPlayer hideTransitions;
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/// <summary>This allows you to perform an action when the highlight starts.</summary>
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public UnityEvent OnShow { get { if (onShow == null) onShow = new UnityEvent(); return onShow; } } [SerializeField] private UnityEvent onShow;
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/// <summary>This allows you to perform an action when the highlight ends.</summary>
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public UnityEvent OnHide { get { if (onHide == null) onHide = new UnityEvent(); return onHide; } } [SerializeField] private UnityEvent onHide;
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[SerializeField]
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private bool showing;
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[System.NonSerialized]
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protected RectTransform rectTransform;
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[System.NonSerialized]
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protected RectTransform canvasRectTransform;
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protected virtual void LateUpdate()
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{
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var eventSystem = EventSystem.current;
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var show = false;
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if (eventSystem != null)
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{
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var selected = eventSystem.currentSelectedGameObject;
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if (selected != null)
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{
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var selectedRect = selected.GetComponent<RectTransform>();
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if (selectedRect != null)
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{
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show = UpdateRect(selectedRect);
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}
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}
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}
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if (showing != show)
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{
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showing = show;
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if (showing == true)
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{
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if (showTransitions != null)
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{
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showTransitions.Begin();
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}
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}
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else
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{
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if (hideTransitions != null)
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{
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hideTransitions.Begin();
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}
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}
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}
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}
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private bool UpdateRect(RectTransform target)
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{
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var camera = worldCamera;
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if (camera == null)
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{
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camera = Camera.main;
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}
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if (camera != null)
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{
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if (rectTransform == null)
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{
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rectTransform = GetComponent<RectTransform>();
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}
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if (canvasRectTransform == null)
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{
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var canvas = GetComponentInParent<Canvas>();
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if (canvas == null)
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{
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throw new System.Exception("Couldn't find attached canvas??");
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}
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canvasRectTransform = canvas.GetComponent<RectTransform>();
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}
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// Calculate viewport/anchor points
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var min = target.rect.min;
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var max = target.rect.max;
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var targetA = target.TransformPoint(min.x, min.y, 0.0f);
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var targetB = target.TransformPoint(max.x, min.y, 0.0f);
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var targetC = target.TransformPoint(min.x, max.y, 0.0f);
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var targetD = target.TransformPoint(max.x, max.y, 0.0f);
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var worldSpace = target.GetComponentInParent<Canvas>().renderMode == RenderMode.WorldSpace;
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var viewportPointA = WorldToViewportPoint(camera, targetA, worldSpace);
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var viewportPointB = WorldToViewportPoint(camera, targetB, worldSpace);
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var viewportPointC = WorldToViewportPoint(camera, targetC, worldSpace);
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var viewportPointD = WorldToViewportPoint(camera, targetD, worldSpace);
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// If outside frustum, hide line out of view
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if (LeanGui.InvaidViewportPoint(camera, viewportPointA) == true || LeanGui.InvaidViewportPoint(camera, viewportPointB) == true ||
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LeanGui.InvaidViewportPoint(camera, viewportPointC) == true || LeanGui.InvaidViewportPoint(camera, viewportPointD) == true)
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{
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viewportPointA = viewportPointB = viewportPointC = viewportPointD = new Vector3(10.0f, 10.0f);
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}
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var minX = Mathf.Min(Mathf.Min(viewportPointA.x, viewportPointB.x), Mathf.Min(viewportPointC.x, viewportPointD.x));
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var minY = Mathf.Min(Mathf.Min(viewportPointA.y, viewportPointB.y), Mathf.Min(viewportPointC.y, viewportPointD.y));
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var maxX = Mathf.Max(Mathf.Max(viewportPointA.x, viewportPointB.x), Mathf.Max(viewportPointC.x, viewportPointD.x));
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var maxY = Mathf.Max(Mathf.Max(viewportPointA.y, viewportPointB.y), Mathf.Max(viewportPointC.y, viewportPointD.y));
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// Convert viewport points to canvas points
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var canvasRect = canvasRectTransform.rect;
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var canvasXA = canvasRect.xMin + canvasRect.width * minX;
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var canvasYA = canvasRect.yMin + canvasRect.height * minY;
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var canvasXB = canvasRect.xMin + canvasRect.width * maxX;
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var canvasYB = canvasRect.yMin + canvasRect.height * maxY;
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// Find center, reset anchor, and convert canvas point to world point
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var canvasX = (canvasXA + canvasXB) * 0.5f;
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var canvasY = (canvasYA + canvasYB) * 0.5f;
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rectTransform.anchorMin = rectTransform.anchorMax = Vector2.zero;
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rectTransform.sizeDelta = new Vector2(canvasXB - canvasXA, canvasYB - canvasYA);
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rectTransform.position = canvasRectTransform.TransformPoint(canvasX, canvasY, 0.0f);
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// Get vector between points
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return true;
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}
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return false;
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}
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private static Vector3 WorldToViewportPoint(Camera camera, Vector3 point, bool worldSpace)
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{
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if (worldSpace == false)
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{
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point = RectTransformUtility.WorldToScreenPoint(null, point);
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point.z = 0.5f;
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return camera.ScreenToViewportPoint(point);
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}
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return camera.WorldToViewportPoint(point);
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}
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}
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}
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#if UNITY_EDITOR
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namespace Lean.Gui.Editor
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{
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using TARGET = LeanSelectionHighlight;
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[UnityEditor.CanEditMultipleObjects]
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[UnityEditor.CustomEditor(typeof(TARGET))]
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public class LeanSelectionHighlight_Editor : LeanEditor
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{
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protected override void OnInspector()
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{
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TARGET tgt; TARGET[] tgts; GetTargets(out tgt, out tgts);
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Draw("worldCamera", "The camera rendering the target transform/position.\nNone = MainCamera.");
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Separator();
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Draw("showTransitions", "This allows you to perform a transition when the highlight begins. You can create a new transition GameObject by right clicking the transition name, and selecting Create. For example, the <b>Graphic.color Transition (LeanGraphicColor)</b> component can be used to change the color.\n\nNOTE: Any transitions you perform here must be reverted in the Hide Transitions setting using a matching transition component.");
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Draw("hideTransitions", "This allows you to perform a transition when the highlight ends. You can create a new transition GameObject by right clicking the transition name, and selecting Create. For example, the <b>Graphic.color Transition (LeanGraphicColor)</b> component can be used to change the color.\n\nNOTE: Any transitions you perform here must be reverted in the Show Transitions setting using a matching transition component.");
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Separator();
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Draw("onShow", "This allows you to perform an action when the highlight starts.");
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Draw("onHide", "This allows you to perform an action when the highlight ends.");
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}
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}
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}
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#endif
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