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174 lines
4.4 KiB
174 lines
4.4 KiB
using System.Windows.Input;
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using Connected.Annotations;
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using Connected.Utilities;
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using Microsoft.AspNetCore.Components;
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using Microsoft.AspNetCore.Components.Web;
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namespace Connected.Components;
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public partial class Overlay : UIComponent, IDisposable
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{
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private bool _visible;
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protected string Classname =>
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new CssBuilder("mud-overlay")
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.AddClass("mud-overlay-absolute", Absolute)
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.AddClass(Class)
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.Build();
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protected string ScrimClassname =>
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new CssBuilder("mud-overlay-scrim")
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.AddClass("mud-overlay-dark", DarkBackground)
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.AddClass("mud-overlay-light", LightBackground)
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.Build();
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protected string Styles =>
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new StyleBuilder()
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.AddStyle("z-index", $"{ZIndex}", ZIndex != 5)
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.AddStyle(Style)
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.Build();
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[Inject] public IScrollManager ScrollManager { get; set; }
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/// <summary>
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/// Child content of the component.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.Behavior)]
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public RenderFragment ChildContent { get; set; }
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/// <summary>
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/// Fires when Visible changes
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/// </summary>
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[Parameter]
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public EventCallback<bool> VisibleChanged { get; set; }
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/// <summary>
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/// If true overlay will be visible. Two-way bindable.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.Behavior)]
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public bool Visible
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{
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get => _visible;
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set
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{
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if (_visible == value)
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return;
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_visible = value;
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VisibleChanged.InvokeAsync(_visible);
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}
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}
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/// <summary>
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/// If true overlay will set Visible false on click.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.ClickAction)]
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public bool AutoClose { get; set; }
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/// <summary>
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/// If true (default), the Document.body element will not be able to scroll
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.Behavior)]
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public bool LockScroll { get; set; } = true;
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/// <summary>
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/// The css class that will be added to body if lockscroll is used.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.Behavior)]
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public string LockScrollClass { get; set; } = "scroll-locked";
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/// <summary>
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/// If true applys the themes dark overlay color.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.Behavior)]
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public bool DarkBackground { get; set; }
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/// <summary>
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/// If true applys the themes light overlay color.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.Behavior)]
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public bool LightBackground { get; set; }
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/// <summary>
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/// Icon class names, separated by space
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.Behavior)]
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public bool Absolute { get; set; }
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/// <summary>
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/// Sets the z-index of the overlay.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.Behavior)]
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public int ZIndex { get; set; } = 5;
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/// <summary>
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/// Command parameter.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.ClickAction)]
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public object CommandParameter { get; set; }
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/// <summary>
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/// Command executed when the user clicks on an element.
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/// </summary>
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[Parameter]
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[Category(CategoryTypes.Overlay.ClickAction)]
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public ICommand Command { get; set; }
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/// <summary>
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/// Fired when the overlay is clicked
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/// </summary>
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[Parameter]
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public EventCallback<MouseEventArgs> OnClick { get; set; }
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protected internal void OnClickHandler(MouseEventArgs ev)
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{
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if (AutoClose)
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Visible = false;
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OnClick.InvokeAsync(ev);
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if (Command?.CanExecute(CommandParameter) ?? false)
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{
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Command.Execute(CommandParameter);
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}
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}
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//if not visible or CSS `position:absolute`, don't lock scroll
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protected override void OnAfterRender(bool firstTime)
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{
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if (!LockScroll || Absolute)
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return;
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if (Visible)
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BlockScroll();
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else
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UnblockScroll();
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}
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//locks the scroll attaching a CSS class to the specified element, in this case the body
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void BlockScroll()
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{
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ScrollManager.LockScrollAsync("body", LockScrollClass);
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}
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//removes the CSS class that prevented scrolling
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void UnblockScroll()
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{
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ScrollManager.UnlockScrollAsync("body", LockScrollClass);
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}
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//When disposing the overlay, remove the class that prevented scrolling
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public void Dispose()
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{
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UnblockScroll();
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}
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}
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