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feat: support dynamic form group generation, add demo.

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This commit is contained in:
rabbitism
2024-11-13 02:24:21 +08:00
parent 59378c4b34
commit 2bb79ef69f
6 changed files with 159 additions and 13 deletions
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24
demo/Ursa.Demo/DataTemplates/FormDataTemplateSelector.cs Normal file
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@@ -0,0 +1,24 @@
using Avalonia.Controls;
using Avalonia.Controls.Templates;
using Ursa.Demo.ViewModels;
namespace Ursa.Demo.Converters;
public class FormDataTemplateSelector: ResourceDictionary, IDataTemplate
{
public Control? Build(object? param)
{
if (param is null) return null;
var type = param.GetType();
if (this.TryGetResource(type, null, out var template) && template is IDataTemplate dataTemplate)
{
return dataTemplate.Build(param);
}
return null;
}
public bool Match(object? data)
{
return data is IFromItemViewModel;
}
}

26
demo/Ursa.Demo/Pages/FormDemo.axaml
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@@ -7,6 +7,7 @@
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:u="https://irihi.tech/ursa"
xmlns:vm="clr-namespace:Ursa.Demo.ViewModels;assembly=Ursa.Demo"
xmlns:converters="clr-namespace:Ursa.Demo.Converters"
d:DesignHeight="450"
d:DesignWidth="800"
x:CompileBindings="True"
@@ -50,6 +51,31 @@
<TextBox Width="300" u:FormItem.Label="Name" Text="{Binding Name}"/>
<TextBox Width="300" u:FormItem.Label="Email" Text="{Binding Email}" />
</u:Form>
<u:Divider Content="MVVM setup for dynamic items. " />
<u:Form ItemsSource="{Binding FormGroups}" HorizontalAlignment="Stretch" LabelPosition="Left" LabelWidth="*">
<u:Form.Styles>
<Style Selector="u|FormGroup" x:DataType="vm:IFormGroupViewModel">
<Setter Property="Header" Value="{Binding Title}" />
<Setter Property="ItemsSource" Value="{Binding Items}" />
</Style>
<Style Selector="u|FormItem" x:DataType="vm:IFromItemViewModel">
<Setter Property="Label" Value="{Binding Label}" />
</Style>
</u:Form.Styles>
<u:Form.ItemTemplate>
<converters:FormDataTemplateSelector>
<DataTemplate x:Key="{x:Type vm:FormTextViewModel}" DataType="vm:FormTextViewModel">
<TextBox Text="{Binding Value}"/>
</DataTemplate>
<DataTemplate x:Key="{x:Type vm:FormAgeViewModel}" DataType="vm:FormAgeViewModel">
<u:NumericUIntUpDown Value="{Binding Age}"/>
</DataTemplate>
<DataTemplate x:Key="{x:Type vm:FormDateRangeViewModel}" DataType="vm:FormDateRangeViewModel">
<u:DateRangePicker SelectedStartDate="{Binding Start}" SelectedEndDate="{Binding End}"/>
</DataTemplate>
</converters:FormDataTemplateSelector>
</u:Form.ItemTemplate>
</u:Form>
</StackPanel>
</ScrollViewer>
</UserControl>

89
demo/Ursa.Demo/ViewModels/FormDemoViewModel.cs
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@@ -1,6 +1,8 @@
using System;
using System.Collections.ObjectModel;
using System.ComponentModel.DataAnnotations;
using CommunityToolkit.Mvvm.ComponentModel;
using Irihi.Avalonia.Shared.Contracts;
namespace Ursa.Demo.ViewModels;
@@ -11,13 +13,48 @@ public partial class FormDemoViewModel : ObservableObject
public FormDemoViewModel()
{
Model = new DataModel();
FormGroups = new ObservableCollection<IFormElement>
{
new FormGroupViewModel
{
Title = "Basic Information",
Items = new ObservableCollection<IFromItemViewModel>
{
new FormTextViewModel { Label = "Name" },
new FormAgeViewModel { Label = "Age" },
new FormTextViewModel { Label = "Email" }
}
},
new FormGroupViewModel
{
Title = "Education Information",
Items = new ObservableCollection<IFromItemViewModel>
{
new FormTextViewModel { Label = "College" },
new FormDateRangeViewModel { Label = "Study Time" }
}
},
new FormTextViewModel(){ Label = "Other" }
};
}
public ObservableCollection<IFormElement> FormGroups { get; set; }
}
public partial class DataModel : ObservableObject
public class DataModel : ObservableObject
{
private DateTime _date;
private string _email = string.Empty;
private string _name = string.Empty;
private double _number;
public DataModel()
{
Date = DateTime.Today;
}
[MinLength(10)]
public string Name
{
@@ -25,8 +62,6 @@ public partial class DataModel : ObservableObject
set => SetProperty(ref _name, value);
}
private double _number;
[Range(0.0, 10.0)]
public double Number
{
@@ -34,8 +69,6 @@ public partial class DataModel : ObservableObject
set => SetProperty(ref _number, value);
}
private string _email = string.Empty;
[EmailAddress]
public string Email
{
@@ -43,16 +76,50 @@ public partial class DataModel : ObservableObject
set => SetProperty(ref _email, value);
}
private DateTime _date;
public DateTime Date
{
get => _date;
set => SetProperty(ref _date, value);
}
}
public DataModel()
{
Date = DateTime.Today;
}
public interface IFormElement
{
}
public interface IFormGroupViewModel : IFormGroup, IFormElement
{
public string? Title { get; set; }
public ObservableCollection<IFromItemViewModel> Items { get; set; }
}
public interface IFromItemViewModel: IFormElement
{
public string? Label { get; set; }
}
public partial class FormGroupViewModel : ObservableObject, IFormGroupViewModel
{
[ObservableProperty] private string? _title;
public ObservableCollection<IFromItemViewModel> Items { get; set; } = [];
}
public partial class FormTextViewModel : ObservableObject, IFromItemViewModel
{
[ObservableProperty] private string? _label;
[ObservableProperty] private string? _value;
}
public partial class FormAgeViewModel : ObservableObject, IFromItemViewModel
{
[ObservableProperty] private uint? _age;
[ObservableProperty] private string? _label;
}
public partial class FormDateRangeViewModel : ObservableObject, IFromItemViewModel
{
[ObservableProperty] private DateTime? _end;
[ObservableProperty] private string? _label;
[ObservableProperty] private DateTime? _start;
}