features/rewrite/dropdown #14
Merged
koma
merged 10 commits from features/rewrite/dropdown into features/rewrite/main 2 years ago
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@page "/demo/components/dropdown"
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@namespace Connected.Components.Showcase.Runner
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@using Connected.Components;
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<Dropdown Items=@Items ItemToKey=@((e) => e.Value.ToString()) @bind-SelectedItems="@SelectedItems" AllowMultiple=true>
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<OptionTemplate>
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@context.Name
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</OptionTemplate>
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<SelectedValueTemplate>
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@context.Name
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</SelectedValueTemplate>
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</Dropdown>
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<div>
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@string.Join(", ", SelectedItems.Select(e=> e.Value))
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</div>
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using System.Collections.ObjectModel;
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namespace Connected.Components.Showcase.Runner;
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public partial class DropdownDemo
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{
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private ObservableCollection<TestObject> SelectedItems { get; set; } = new();
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private ObservableCollection<TestObject> Items { get; set; } = new ObservableCollection<TestObject>
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{
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new TestObject
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{
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Name= "Simple",
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Value = 1
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},
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new TestObject
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{
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Name = "Simpler",
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Value = 2
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}
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};
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public class TestObject
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{
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public string Name { get; set; }
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public long Value { get; set; }
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}
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}
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@ -0,0 +1,48 @@
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@typeparam T;
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@inherits Connected.Models.InputBase;
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<div class="@InputFieldClassList">
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<select type="textarea" @onfocus="(()=> Open())" @onblur="(()=> Close())">
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@if (SelectedItems.Any())
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{
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<option selected>
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@foreach (var item in SelectedItems)
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{
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@SelectedValueTemplate?.Invoke(item)
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}
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</option>
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}
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</select>
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<span class="highlight"></span><span class="bar"></span>
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<label class="label-animated">@Label</label>
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<div class="input-helper-text">@HelperText</div>
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<div class="input-error-text">@ErrorText</div>
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<span class="input-glyph-wraper">
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<span class="input-glyph button">
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<Glyph SVG="@Icons.Material.Outlined.Cancel" class="icon-root svg-icon" Click="_ => { SelectedItems.Clear(); Close(); }" />
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</span>
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<span class="input-glyph">
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<Glyph SVG="@Icons.Material.Filled.ArrowDropDown" class="icon-root svg-icon icon-size-md" Click="()=> Toggle()" />
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</span>
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<span class="input-glyph error">
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<Glyph SVG="@Icons.Material.Outlined.ErrorOutline" class="icon-root svg-icon" />
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</span>
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</span>
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<TransitionAnimator TransitionDuration="5000" TransitionInClass="drop-down fade-in" TransitionOutClass="drop-down fade-out" Visible=@DropdownOpen>
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<div class="backdrop d-sm-none">
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</div>
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<div class="dropdown-menu">
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@foreach (var item in Items)
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{
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<div class="dropdown-item @(IsItemSelected(item)?"active":"")"
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@onclick="(async () => await OptionSelected(item))">
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@OptionTemplate?.Invoke(item)
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</div>
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}
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</div>
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</TransitionAnimator>
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</div>
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@ -0,0 +1,112 @@
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using Microsoft.AspNetCore.Components;
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using System.Collections.ObjectModel;
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using Connected.Models;
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using System.Collections.Immutable;
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namespace Connected.Components;
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public partial class Dropdown<T> : InputBase, IAsyncDisposable
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{
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[Parameter, EditorRequired]
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public ObservableCollection<T> Items { get; set; } = new ObservableCollection<T>();
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[Parameter]
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public RenderFragment<T>? OptionTemplate { get; set; }
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[Parameter]
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public RenderFragment<T>? SelectedValueTemplate { get; set; }
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[Parameter, EditorRequired]
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public Func<T, string> ItemToKey { get; set; } = default!;
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[Parameter]
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public ObservableCollection<T> SelectedItems { get; set; } = new();
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[Parameter]
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public EventCallback<ObservableCollection<T>> SelectedItemsChanged { get; set; }
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[Parameter]
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public bool AllowMultiple { get; set; }
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private bool DropdownOpen { get; set; }
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private bool IsItemSelected(T item)
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{
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return SelectedItems.Contains(item);
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}
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public void Open()
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{
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DropdownOpen = true;
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}
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public void Close()
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{
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DropdownOpen = false;
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}
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public void Toggle()
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{
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DropdownOpen = !DropdownOpen;
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}
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protected override void OnInitialized()
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{
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base.OnInitialized();
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OptionTemplate ??= (T item) => (builder) =>
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{
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builder.OpenElement(0, "div");
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builder.SetKey(item);
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builder.AddContent(1, item?.ToString());
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builder.CloseElement();
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};
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SelectedValueTemplate ??= (T item) => (builder) =>
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{
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builder.OpenElement(0, "span");
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builder.SetKey(item);
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builder.AddContent(1, item?.ToString());
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builder.CloseElement();
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};
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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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Items.CollectionChanged += CollectionChanged;
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SelectedItems.CollectionChanged += CollectionChanged;
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}
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private void CollectionChanged(object? sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
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{
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if (sender == SelectedItems)
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SelectedItemsChanged.InvokeAsync(SelectedItems);
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StateHasChanged();
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}
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private async Task OptionSelected(T item)
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{
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if (AllowMultiple)
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{
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if (SelectedItems.Contains(item))
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{
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SelectedItems.Remove(item);
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return;
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}
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}
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else
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{
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SelectedItems.Clear();
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}
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SelectedItems.Add(item);
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}
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public async ValueTask DisposeAsync()
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{
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Items.CollectionChanged -= CollectionChanged;
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SelectedItems.CollectionChanged -= CollectionChanged;
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}
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}
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@ -0,0 +1,107 @@
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@using Connected.Utilities;
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<div class="@ClassList" @ontransitionend="TransitionEnd" @onanimationend="TransitionEnd">
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@if (ContentVisible)
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{
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@ChildContent
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}
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</div>
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<style>
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.transition-container-component {
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transition: all @(TransitionDuration)ms;
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}
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</style>
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@code {
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private bool _visible = false;
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/// <summary>
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/// The class to append to the container while content is visible and transitioning in
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/// </summary>
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[Parameter, EditorRequired]
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public string? TransitionInClass { get; set; }
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/// <summary>
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/// The class to append to the container while content is transitioning out and hidden
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/// </summary>
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[Parameter, EditorRequired]
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public string? TransitionOutClass { get; set; }
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/// <summary>
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/// The class to append to the container to control transitions
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/// </summary>
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[Parameter]
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public string? TransitionContainerClass { get; set; } = "transition-container-component";
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/// <summary>
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/// Controls the visibility of the child content
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/// </summary>
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[Parameter, EditorRequired]
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public bool Visible { get => _visible; set => StartTransition(value); }
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/// <summary>
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/// The content to show/hide
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/// </summary>
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[Parameter, EditorRequired]
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public RenderFragment? ChildContent { get; set; }
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/// <summary>
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/// Indicates a transition has ended. Useful for visual cleanup.
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/// </summary>
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[Parameter]
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public EventCallback TransitionEnded { get; set; }
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/// <summary>
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/// The duration of transitions in milliseconds.
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/// </summary>
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[Parameter]
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public int TransitionDuration { get; set; } = 2000;
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private bool TransitioningIn { get; set; }
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private bool TransitioningOut { get; set; }
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private bool ContentVisible { get; set; }
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private CssBuilder ClassList
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{
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get
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{
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return new CssBuilder(TransitionContainerClass)
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.AddClass(TransitionInClass, TransitioningIn)
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.AddClass(TransitionOutClass, TransitioningOut);
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}
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}
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private void StartTransition(bool visible)
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{
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if (visible == Visible)
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return;
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_visible = visible;
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TransitioningIn = visible;
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TransitioningOut = !visible;
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if (visible)
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ContentVisible = true;
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StateHasChanged();
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}
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private void TransitionEnd()
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{
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ContentVisible = Visible;
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StateHasChanged();
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TransitionEnded.InvokeAsync();
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}
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protected override void OnInitialized()
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{
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base.OnInitialized();
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ContentVisible = Visible;
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}
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}
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