148 строки
4.4 KiB
C#
148 строки
4.4 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System.Timers;
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using Microsoft.AspNetCore.Components;
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namespace AntDesign
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{
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/**
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<summary>
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<para>A spinner for displaying loading state of a page or a section.</para>
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<h2>When To Use</h2>
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<para>When part of the page is waiting for asynchronous data or during a rendering process, an appropriate loading animation can effectively alleviate users' inquietude.</para>
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</summary>
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*/
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[Documentation(DocumentationCategory.Components, DocumentationType.Feedback, "https://gw.alipayobjects.com/zos/alicdn/LBcJqCPRv/Spin.svg", Title = "Spin", SubTitle = "加载中")]
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public partial class Spin : AntDomComponentBase
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{
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/// <summary>
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/// Size of the spinner. Possible values: small, default, large
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/// </summary>
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/// <default value="default" />
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[Parameter]
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public string Size { get; set; } = "default";
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/// <summary>
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/// Customize description content when Spin has children
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/// </summary>
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[Parameter]
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public string Tip { get; set; } = null;
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/// <summary>
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/// Specifies a delay in milliseconds for loading state (prevent flush)
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/// </summary>
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/// <default value="0" />
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[Parameter]
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public int Delay { get; set; } = 0;
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/// <summary>
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/// Whether spin is active
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/// </summary>
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/// <default value="true" />
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[Parameter]
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public bool Spinning { get; set; } = true;
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/// <summary>
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/// Class name for the wrapper
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/// </summary>
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[Parameter]
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public string WrapperClassName { get; set; }
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/// <summary>
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/// Custom display for the spinning indicator
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/// </summary>
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[Parameter]
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public RenderFragment Indicator { get; set; }
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/// <summary>
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/// Content the spin will indicate loading for
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/// </summary>
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[Parameter]
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public RenderFragment ChildContent { get; set; }
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private ClassMapper WrapperClassMapper { get; set; } = new ClassMapper();
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private const string PrefixCls = "ant-spin";
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private bool _isLoading = true;
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private bool Simple => ChildContent == null;
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private string ContainerClass => _isLoading ? $"{PrefixCls}-blur" : "";
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private Timer _delayTimer;
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private void SetClass()
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{
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WrapperClassMapper
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.If(WrapperClassName, () => !string.IsNullOrWhiteSpace(WrapperClassName))
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.If($"{PrefixCls}-nested-loading", () => !Simple);
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ClassMapper
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.Add(PrefixCls)
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.If($"{PrefixCls}-spinning", () => _isLoading)
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.If($"{PrefixCls}-lg", () => Size == "large")
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.If($"{PrefixCls}-sm", () => Size == "small")
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.If($"{PrefixCls}-show-text", () => string.IsNullOrWhiteSpace(Tip))
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.If($"{PrefixCls}-rtl", () => RTL);
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}
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protected override void OnInitialized()
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{
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SetClass();
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_isLoading = Spinning;
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if (Delay > 0)
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{
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_delayTimer = new Timer(Delay);
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_delayTimer.Elapsed += DelayElapsed;
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}
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base.OnInitialized();
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}
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protected override void OnParametersSet()
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{
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base.OnParametersSet();
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if (_delayTimer != null)
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{
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if (_isLoading != Spinning)
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{
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_delayTimer.Stop();
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_delayTimer.Start();
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}
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else
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{
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_delayTimer.Stop();
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}
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}
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else
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{
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if (_isLoading != Spinning)
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{
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_isLoading = Spinning;
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InvokeAsync(StateHasChanged);
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}
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}
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}
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private void DelayElapsed(object sender, ElapsedEventArgs args)
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{
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_isLoading = Spinning;
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InvokeAsync(StateHasChanged);
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}
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protected override void Dispose(bool disposing)
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{
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_delayTimer?.Dispose();
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base.Dispose(disposing);
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}
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}
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}
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