499 lines
18 KiB
C#
499 lines
18 KiB
C#
///Credit perchik
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///Sourced from - http://forum.unity3d.com/threads/receive-onclick-event-and-pass-it-on-to-lower-ui-elements.293642/
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using System.Collections.Generic;
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using System.Linq;
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namespace UnityEngine.UI.Extensions
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{
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public enum AutoCompleteSearchType
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{
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ArraySort,
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Linq
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}
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[RequireComponent(typeof(RectTransform))]
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[AddComponentMenu("UI/Extensions/ComboBox/AutoComplete ComboBox")]
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public class AutoCompleteComboBox : MonoBehaviour
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{
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public Color disabledTextColor;
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public DropDownListItem SelectedItem { get; private set; } //outside world gets to get this, not set it
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/// <summary>
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/// Contains the included items. To add and remove items to/from this list, use the <see cref="AddItem(string)"/>,
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/// <see cref="RemoveItem(string)"/> and <see cref="SetAvailableOptions(List{string})"/> methods as these also execute
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/// the required methods to update to the current collection.
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/// </summary>
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public List<string> AvailableOptions;
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private bool _isPanelActive = false;
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private bool _hasDrawnOnce = false;
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private InputField _mainInput;
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private RectTransform _inputRT;
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private RectTransform _rectTransform;
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private RectTransform _overlayRT;
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private RectTransform _scrollPanelRT;
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private RectTransform _scrollBarRT;
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private RectTransform _slidingAreaRT;
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private RectTransform _scrollHandleRT;
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private RectTransform _itemsPanelRT;
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private Canvas _canvas;
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private RectTransform _canvasRT;
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private ScrollRect _scrollRect;
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private List<string> _panelItems; //items that will get shown in the drop-down
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private List<string> _prunedPanelItems; //items that used to show in the drop-down
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private Dictionary<string, GameObject> panelObjects;
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private GameObject itemTemplate;
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public string Text { get; private set; }
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[SerializeField]
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private float dropdownOffset;
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[SerializeField]
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private float _scrollBarWidth = 20.0f;
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public float ScrollBarWidth
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{
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get { return _scrollBarWidth; }
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set
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{
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_scrollBarWidth = value;
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RedrawPanel();
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}
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}
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[SerializeField]
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private int _itemsToDisplay;
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public int ItemsToDisplay
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{
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get { return _itemsToDisplay; }
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set
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{
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_itemsToDisplay = value;
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RedrawPanel();
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}
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}
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public bool SelectFirstItemOnStart = false;
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[SerializeField]
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[Tooltip("Change input text color based on matching items")]
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private bool _ChangeInputTextColorBasedOnMatchingItems = false;
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public bool InputColorMatching
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{
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get { return _ChangeInputTextColorBasedOnMatchingItems; }
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set
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{
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_ChangeInputTextColorBasedOnMatchingItems = value;
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if (_ChangeInputTextColorBasedOnMatchingItems)
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{
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SetInputTextColor();
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}
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}
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}
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public float DropdownOffset = 10f;
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public Color ValidSelectionTextColor = Color.green;
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public Color MatchingItemsRemainingTextColor = Color.black;
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public Color NoItemsRemainingTextColor = Color.red;
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public AutoCompleteSearchType autocompleteSearchType = AutoCompleteSearchType.Linq;
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[SerializeField]
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private bool _displayPanelAbove = false;
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private bool _selectionIsValid = false;
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[System.Serializable]
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public class SelectionChangedEvent : Events.UnityEvent<string, bool> { }
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[System.Serializable]
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public class SelectionTextChangedEvent : Events.UnityEvent<string> { }
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[System.Serializable]
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public class SelectionValidityChangedEvent : Events.UnityEvent<bool> { }
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// fires when input text is changed;
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public SelectionTextChangedEvent OnSelectionTextChanged;
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// fires when an Item gets selected / deselected (including when items are added/removed once this is possible)
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public SelectionValidityChangedEvent OnSelectionValidityChanged;
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// fires in both cases
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public SelectionChangedEvent OnSelectionChanged;
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public void Awake()
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{
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Initialize();
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}
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public void Start()
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{
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if (SelectFirstItemOnStart && AvailableOptions.Count > 0)
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{
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ToggleDropdownPanel(false);
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OnItemClicked(AvailableOptions[0]);
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}
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RedrawPanel();
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}
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private bool Initialize()
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{
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bool success = true;
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try
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{
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_rectTransform = GetComponent<RectTransform>();
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_inputRT = _rectTransform.Find("InputField").GetComponent<RectTransform>();
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_mainInput = _inputRT.GetComponent<InputField>();
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_overlayRT = _rectTransform.Find("Overlay").GetComponent<RectTransform>();
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_overlayRT.gameObject.SetActive(false);
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_scrollPanelRT = _overlayRT.Find("ScrollPanel").GetComponent<RectTransform>();
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_scrollBarRT = _scrollPanelRT.Find("Scrollbar").GetComponent<RectTransform>();
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_slidingAreaRT = _scrollBarRT.Find("SlidingArea").GetComponent<RectTransform>();
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_scrollHandleRT = _slidingAreaRT.Find("Handle").GetComponent<RectTransform>();
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_itemsPanelRT = _scrollPanelRT.Find("Items").GetComponent<RectTransform>();
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_canvas = GetComponentInParent<Canvas>();
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_canvasRT = _canvas.GetComponent<RectTransform>();
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_scrollRect = _scrollPanelRT.GetComponent<ScrollRect>();
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_scrollRect.scrollSensitivity = _rectTransform.sizeDelta.y / 2;
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_scrollRect.movementType = ScrollRect.MovementType.Clamped;
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_scrollRect.content = _itemsPanelRT;
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itemTemplate = _rectTransform.Find("ItemTemplate").gameObject;
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itemTemplate.SetActive(false);
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}
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catch (System.NullReferenceException ex)
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{
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Debug.LogException(ex);
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Debug.LogError("Something is setup incorrectly with the dropdownlist component causing a Null Reference Exception");
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success = false;
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}
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panelObjects = new Dictionary<string, GameObject>();
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_prunedPanelItems = new List<string>();
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_panelItems = new List<string>();
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RebuildPanel();
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return success;
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}
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/// <summary>
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/// Adds the item to <see cref="this.AvailableOptions"/> if it is not a duplicate and rebuilds the panel.
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/// </summary>
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/// <param name="item">Item to add.</param>
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public void AddItem(string item)
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{
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if (!this.AvailableOptions.Contains(item))
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{
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this.AvailableOptions.Add(item);
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this.RebuildPanel();
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}
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else
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{
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Debug.LogWarning($"{nameof(AutoCompleteComboBox)}.{nameof(AddItem)}: items may only exists once. '{item}' can not be added.");
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}
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}
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/// <summary>
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/// Removes the item from <see cref="this.AvailableOptions"/> and rebuilds the panel.
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/// </summary>
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/// <param name="item">Item to remove.</param>
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public void RemoveItem(string item)
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{
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if (this.AvailableOptions.Contains(item))
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{
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this.AvailableOptions.Remove(item);
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this.RebuildPanel();
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}
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}
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/// <summary>
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/// Sets the given items as new content for the comboBox. Previous entries will be cleared.
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/// </summary>
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/// <param name="newOptions">New entries.</param>
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public void SetAvailableOptions(List<string> newOptions)
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{
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var uniqueOptions = newOptions.Distinct().ToArray();
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SetAvailableOptions(uniqueOptions);
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}
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/// <summary>
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/// Sets the given items as new content for the comboBox. Previous entries will be cleared.
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/// </summary>
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/// <param name="newOptions">New entries.</param>
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public void SetAvailableOptions(string[] newOptions)
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{
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var uniqueOptions = newOptions.Distinct().ToList();
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if (newOptions.Length != uniqueOptions.Count)
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{
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Debug.LogWarning($"{nameof(AutoCompleteComboBox)}.{nameof(SetAvailableOptions)}: items may only exists once. {newOptions.Length - uniqueOptions.Count} duplicates.");
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}
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this.AvailableOptions.Clear();
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for (int i = 0; i < newOptions.Length; i++)
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{
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this.AvailableOptions.Add(newOptions[i]);
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}
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this.RebuildPanel();
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this.RedrawPanel();
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}
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public void ResetItems()
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{
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AvailableOptions.Clear();
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RebuildPanel();
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RedrawPanel();
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}
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/// <summary>
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/// Rebuilds the contents of the panel in response to items being added.
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/// </summary>
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private void RebuildPanel()
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{
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if (_isPanelActive) ToggleDropdownPanel();
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//panel starts with all options
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_panelItems.Clear();
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_prunedPanelItems.Clear();
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panelObjects.Clear();
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//clear Autocomplete children in scene
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foreach (Transform child in _itemsPanelRT.transform)
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{
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Destroy(child.gameObject);
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}
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foreach (string option in AvailableOptions)
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{
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_panelItems.Add(option.ToLower());
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}
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List<GameObject> itemObjs = new List<GameObject>(panelObjects.Values);
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int indx = 0;
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while (itemObjs.Count < AvailableOptions.Count)
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{
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GameObject newItem = Instantiate(itemTemplate) as GameObject;
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newItem.name = "Item " + indx;
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newItem.transform.SetParent(_itemsPanelRT, false);
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itemObjs.Add(newItem);
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indx++;
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}
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for (int i = 0; i < itemObjs.Count; i++)
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{
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itemObjs[i].SetActive(i <= AvailableOptions.Count);
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if (i < AvailableOptions.Count)
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{
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itemObjs[i].name = "Item " + i + " " + _panelItems[i];
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itemObjs[i].transform.Find("Text").GetComponent<Text>().text = AvailableOptions[i]; //set the text value
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Button itemBtn = itemObjs[i].GetComponent<Button>();
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itemBtn.onClick.RemoveAllListeners();
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string textOfItem = _panelItems[i]; //has to be copied for anonymous function or it gets garbage collected away
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itemBtn.onClick.AddListener(() =>
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{
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OnItemClicked(textOfItem);
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});
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panelObjects[_panelItems[i]] = itemObjs[i];
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}
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}
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SetInputTextColor();
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}
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/// <summary>
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/// what happens when an item in the list is selected
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/// </summary>
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/// <param name="item"></param>
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private void OnItemClicked(string item)
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{
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//Debug.Log("item " + item + " clicked");
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Text = item;
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_mainInput.text = Text;
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ToggleDropdownPanel(true);
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}
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private void RedrawPanel()
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{
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float scrollbarWidth = _panelItems.Count > ItemsToDisplay ? _scrollBarWidth : 0f;//hide the scrollbar if there's not enough items
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_scrollBarRT.gameObject.SetActive(_panelItems.Count > ItemsToDisplay);
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if (!_hasDrawnOnce || _rectTransform.sizeDelta != _inputRT.sizeDelta)
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{
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_hasDrawnOnce = true;
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_inputRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _rectTransform.sizeDelta.x);
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_inputRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, _rectTransform.sizeDelta.y);
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var itemsRemaining = _panelItems.Count - ItemsToDisplay;
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itemsRemaining = itemsRemaining < 0 ? 0 : itemsRemaining;
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_scrollPanelRT.SetParent(transform, true);
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_scrollPanelRT.anchoredPosition = _displayPanelAbove ?
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new Vector2(0, dropdownOffset + _rectTransform.sizeDelta.y * (_panelItems.Count - itemsRemaining) - 1) :
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new Vector2(0, -_rectTransform.sizeDelta.y);
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//make the overlay fill the screen
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_overlayRT.SetParent(_canvas.transform, false);
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_overlayRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _canvasRT.sizeDelta.x);
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_overlayRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, _canvasRT.sizeDelta.y);
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_overlayRT.SetParent(transform, true);
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_scrollPanelRT.SetParent(_overlayRT, true);
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}
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if (_panelItems.Count < 1) return;
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float dropdownHeight = _rectTransform.sizeDelta.y * Mathf.Min(_itemsToDisplay, _panelItems.Count) + dropdownOffset;
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_scrollPanelRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, dropdownHeight);
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_scrollPanelRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _rectTransform.sizeDelta.x);
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_itemsPanelRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _scrollPanelRT.sizeDelta.x - scrollbarWidth - 5);
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_itemsPanelRT.anchoredPosition = new Vector2(5, 0);
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_scrollBarRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, scrollbarWidth);
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_scrollBarRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, dropdownHeight);
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if (scrollbarWidth == 0) _scrollHandleRT.gameObject.SetActive(false); else _scrollHandleRT.gameObject.SetActive(true);
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_slidingAreaRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, 0);
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_slidingAreaRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, dropdownHeight - _scrollBarRT.sizeDelta.x);
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}
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public void OnValueChanged(string currText)
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{
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Text = currText;
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PruneItems(currText);
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RedrawPanel();
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if (_panelItems.Count == 0)
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{
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_isPanelActive = true;//this makes it get turned off
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ToggleDropdownPanel(false);
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}
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else if (!_isPanelActive)
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{
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ToggleDropdownPanel(false);
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}
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bool validity_changed = (_panelItems.Contains(Text) != _selectionIsValid);
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_selectionIsValid = _panelItems.Contains(Text);
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OnSelectionChanged.Invoke(Text, _selectionIsValid);
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OnSelectionTextChanged.Invoke(Text);
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if (validity_changed)
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{
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OnSelectionValidityChanged.Invoke(_selectionIsValid);
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}
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SetInputTextColor();
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}
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private void SetInputTextColor()
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{
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if (InputColorMatching)
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{
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if (_selectionIsValid)
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{
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_mainInput.textComponent.color = ValidSelectionTextColor;
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}
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else if (_panelItems.Count > 0)
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{
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_mainInput.textComponent.color = MatchingItemsRemainingTextColor;
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}
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else
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{
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_mainInput.textComponent.color = NoItemsRemainingTextColor;
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}
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}
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}
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/// <summary>
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/// Toggle the drop down list
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/// </summary>
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/// <param name="directClick"> whether an item was directly clicked on</param>
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public void ToggleDropdownPanel(bool directClick = false)
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{
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_isPanelActive = !_isPanelActive;
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_overlayRT.gameObject.SetActive(_isPanelActive);
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if (_isPanelActive)
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{
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transform.SetAsLastSibling();
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}
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else if (directClick)
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{
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// scrollOffset = Mathf.RoundToInt(itemsPanelRT.anchoredPosition.y / _rectTransform.sizeDelta.y);
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}
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}
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private void PruneItems(string currText)
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{
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if (autocompleteSearchType == AutoCompleteSearchType.Linq)
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{
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PruneItemsLinq(currText);
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}
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else
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{
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PruneItemsArray(currText);
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}
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}
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private void PruneItemsLinq(string currText)
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{
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currText = currText.ToLower();
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var toPrune = _panelItems.Where(x => !x.Contains(currText)).ToArray();
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foreach (string key in toPrune)
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{
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panelObjects[key].SetActive(false);
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_panelItems.Remove(key);
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_prunedPanelItems.Add(key);
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}
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var toAddBack = _prunedPanelItems.Where(x => x.Contains(currText)).ToArray();
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foreach (string key in toAddBack)
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{
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panelObjects[key].SetActive(true);
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_panelItems.Add(key);
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_prunedPanelItems.Remove(key);
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}
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}
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//Updated to not use Linq
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private void PruneItemsArray(string currText)
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{
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string _currText = currText.ToLower();
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for (int i = _panelItems.Count - 1; i >= 0; i--)
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{
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string _item = _panelItems[i];
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if (!_item.Contains(_currText))
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{
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panelObjects[_panelItems[i]].SetActive(false);
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_panelItems.RemoveAt(i);
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_prunedPanelItems.Add(_item);
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}
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}
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for (int i = _prunedPanelItems.Count - 1; i >= 0; i--)
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{
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string _item = _prunedPanelItems[i];
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if (_item.Contains(_currText))
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{
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panelObjects[_prunedPanelItems[i]].SetActive(true);
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_prunedPanelItems.RemoveAt(i);
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_panelItems.Add(_item);
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}
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}
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}
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}
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} |