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133 lines
3.7 KiB
133 lines
3.7 KiB
using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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using TMPro;
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/// <summary>
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/// Component which controls how a LogicElement is displayed in the UI;
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/// </summary>
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public class LogicElementUI : Dragable
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{
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#region Inspector Fields
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[SerializeField]
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[Tooltip("Logic Block this will display")]
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protected LogicBlock LogicElement;
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#endregion Inspector Fields
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#region ReadOnly Variables
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/// <summary>
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/// RectTransform of LogicElementUI
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/// </summary>
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public RectTransform rectTransform { get { return transform as RectTransform; } }
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public LogicBlock logicElement { get { return LogicElement; } }
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#endregion ReadOnly Variables
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#region Private Variables
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//Text Mesh pro to display Name
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protected TextMeshProUGUI nameText;
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//background image to color;
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protected Image background;
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protected LogicElementHolder currentHolder;
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private List<LogicElementHolder> lastHover = new List<LogicElementHolder>();
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#endregion Private Variables
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#region Unity Functions
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private void Start()
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{
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UpdateUI();
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}
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#endregion Unity Functions
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#region Class Implementation
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/// <summary>
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/// Updates the UI to match the LogicElemnts name and color
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/// </summary>
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public virtual void UpdateUI()
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{
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//Make sure we have the UI components
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if (nameText == null)
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nameText = GetComponentInChildren<TextMeshProUGUI>();
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if (background == null)
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background = GetComponentInChildren<Image>();
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//Set UI
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if (LogicElement != null)
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{
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//If name null use file name
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nameText.text = (string.IsNullOrEmpty(LogicElement.DisplayName)) ? LogicElement.name : LogicElement.DisplayName;
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background.color = LogicElement.Color;
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}
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}
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public virtual void Initialise(LogicBlock LogicElement, LogicElementHolder Holder)
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{
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this.LogicElement = LogicElement;
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currentHolder = Holder;
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}
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#endregion Class Implementation
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#region Drag Implementation
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public override void OnBeginDrag(PointerEventData eventData)
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{
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base.OnBeginDrag(eventData);
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if (currentHolder != null)
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currentHolder.OnRemove(this);
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}
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public override void OnDrag(PointerEventData data)
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{
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base.OnDrag(data);
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//Get all overlapping holders
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List<LogicElementHolder> currentHover = LogicElementHolder.OverlappingElements(transform as RectTransform).ToList();
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DebugExtensions.DrawRect(rectTransform, Color.blue);
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LogicElementHolder.DebugDrawAll(Color.red);
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//Call OnHoverStart() for each holder which wasn't in the last update
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currentHover.Except(lastHover).ForEach(p => p.OnHoverStart(this));
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//Call OnHover() for each overlapping holder
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currentHover.ForEach(p => p.OnHover(this));
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//Call OnHoverEnd() for each element not overlapping but was last update
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lastHover.Except(currentHover).ForEach(p => p.OnHoverEnd(this));
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//Save all overlapping elements this update
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lastHover = currentHover;
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}
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public override void OnEndDrag(PointerEventData eventData)
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{
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base.OnEndDrag(eventData);
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//Call OnHoverStop to each element we are hovering over
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lastHover.ForEach(p => p.OnHoverEnd(this));
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//If we are still hovering over anything add this to it
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//Else add it back to where it came from
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if (lastHover.Count > 0)
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{
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lastHover[0].OnAdd(this);
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currentHolder = lastHover[0];
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}
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else
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currentHolder.OnAdd(this);
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}
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#endregion Drag Implementaion
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}
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