135 lines
4.0 KiB
C#
135 lines
4.0 KiB
C#
using System;
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using System.Threading;
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using JetBrains.Annotations;
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using Unity.Cloud.Collaborate.Assets;
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using Unity.Cloud.Collaborate.UserInterface;
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using UnityEditor;
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using UnityEditor.UIElements;
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using UnityEngine;
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using UnityEngine.UIElements;
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namespace Unity.Cloud.Collaborate.Components
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{
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class SearchBar : VisualElement
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{
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public const string UssClassName = "unity-search-bar";
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public const string SearchFieldUssClassName = UssClassName + "__search-field";
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public const string PlaceholderUssClassName = UssClassName + "__placeholder";
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static readonly string k_StylePath = $"{CollaborateWindow.StylePath}/{nameof(SearchBar)}.uss";
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public const int timeoutMilliseconds = 1000;
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readonly ToolbarSearchField m_SearchField;
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readonly Label m_Placeholder;
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string m_LatestSearchValue;
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bool m_SearchEventFlag;
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readonly Timer m_SearchEventTimer;
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bool m_Focused;
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public event Action<string> Search = delegate { };
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public SearchBar() : this(null)
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{
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}
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public SearchBar([CanBeNull] Action<string> searchEvent = null)
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{
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// Setup delayed search event to throttle requests.
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m_SearchEventTimer = new Timer(_ => EditorApplication.delayCall += () =>
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{
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m_SearchEventFlag = false;
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Search(m_LatestSearchValue);
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});
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AddToClassList(UssClassName);
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styleSheets.Add(AssetDatabase.LoadAssetAtPath<StyleSheet>(k_StylePath));
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m_SearchField = new ToolbarSearchField();
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m_Placeholder = new Label { text = StringAssets.search, pickingMode = PickingMode.Ignore };
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m_SearchField.AddToClassList(SearchFieldUssClassName);
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m_Placeholder.AddToClassList(PlaceholderUssClassName);
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Add(m_SearchField);
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Add(m_Placeholder);
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// Setup search event
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if (searchEvent != null)
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{
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Search += searchEvent;
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}
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// Setup events to hide/show placeholder.
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var textField = m_SearchField.Q<TextField>(className: ToolbarSearchField.textUssClassName);
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textField.RegisterCallback<FocusInEvent>(e =>
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{
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m_Focused = true;
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UpdatePlaceholderVisibility();
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});
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textField.RegisterCallback<FocusOutEvent>(e =>
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{
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m_Focused = false;
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UpdatePlaceholderVisibility();
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});
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m_SearchField.RegisterValueChangedCallback(SearchEventThrottle);
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// Set initial placeholder hide/show status.
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ShowPlaceholder();
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}
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void SearchEventThrottle(ChangeEvent<string> evt)
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{
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UpdatePlaceholderVisibility();
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m_LatestSearchValue = evt.newValue;
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if (m_SearchEventFlag) return;
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m_SearchEventFlag = true;
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m_SearchEventTimer.Change(timeoutMilliseconds, Timeout.Infinite);
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}
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public string Value
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{
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get => m_SearchField.value;
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set
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{
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m_SearchField.value = value;
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UpdatePlaceholderVisibility();
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}
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}
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public void SetValueWithoutNotify(string value)
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{
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m_SearchField.SetValueWithoutNotify(value);
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UpdatePlaceholderVisibility();
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}
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void UpdatePlaceholderVisibility()
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{
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if (string.IsNullOrEmpty(m_SearchField.value) && !m_Focused)
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{
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ShowPlaceholder();
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}
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else
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{
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HidePlaceholder();
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}
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}
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void HidePlaceholder()
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{
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m_Placeholder.AddToClassList(UiConstants.ussHidden);
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}
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void ShowPlaceholder()
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{
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m_Placeholder.RemoveFromClassList(UiConstants.ussHidden);
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}
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[UsedImplicitly]
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public new class UxmlFactory : UxmlFactory<SearchBar> { }
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}
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}
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