Dong Bin
GitHub
257
src/Ursa/Controls/Rating/Rating.cs
Normal file
257
src/Ursa/Controls/Rating/Rating.cs
Normal file
@@ -0,0 +1,257 @@
|
||||
using Avalonia;
|
||||
using Avalonia.Collections;
|
||||
using Avalonia.Controls;
|
||||
using Avalonia.Controls.Metadata;
|
||||
using Avalonia.Controls.Primitives;
|
||||
using Avalonia.Controls.Templates;
|
||||
using Avalonia.Data;
|
||||
using Avalonia.Interactivity;
|
||||
|
||||
namespace Ursa.Controls;
|
||||
|
||||
[PseudoClasses(PC_Selected)]
|
||||
[TemplatePart(PART_ItemsControl, typeof(ItemsControl))]
|
||||
public class Rating : TemplatedControl
|
||||
{
|
||||
public const string PART_ItemsControl = "PART_ItemsControl";
|
||||
protected const string PC_Selected = ":selected";
|
||||
|
||||
public static readonly StyledProperty<double> ValueProperty =
|
||||
AvaloniaProperty.Register<Rating, double>(nameof(Value), defaultBindingMode: BindingMode.TwoWay);
|
||||
|
||||
public static readonly StyledProperty<bool> AllowClearProperty =
|
||||
AvaloniaProperty.Register<Rating, bool>(nameof(AllowClear), true);
|
||||
|
||||
public static readonly StyledProperty<bool> AllowHalfProperty =
|
||||
AvaloniaProperty.Register<Rating, bool>(nameof(AllowHalf));
|
||||
|
||||
public static readonly StyledProperty<object> CharacterProperty =
|
||||
AvaloniaProperty.Register<Rating, object>(nameof(Character));
|
||||
|
||||
public static readonly StyledProperty<int> CountProperty =
|
||||
AvaloniaProperty.Register<Rating, int>(nameof(Count), 5);
|
||||
|
||||
public static readonly StyledProperty<double> DefaultValueProperty =
|
||||
AvaloniaProperty.Register<Rating, double>(nameof(DefaultValue));
|
||||
|
||||
public static readonly StyledProperty<double> SizeProperty =
|
||||
AvaloniaProperty.Register<RatingCharacter, double>(nameof(Size));
|
||||
|
||||
public static readonly StyledProperty<IDataTemplate?> ItemTemplateProperty =
|
||||
AvaloniaProperty.Register<Rating, IDataTemplate?>(nameof(ItemTemplate));
|
||||
|
||||
public double Value
|
||||
{
|
||||
get => GetValue(ValueProperty);
|
||||
set => SetValue(ValueProperty, value);
|
||||
}
|
||||
|
||||
public bool AllowClear
|
||||
{
|
||||
get => GetValue(AllowClearProperty);
|
||||
set => SetValue(AllowClearProperty, value);
|
||||
}
|
||||
|
||||
public bool AllowHalf
|
||||
{
|
||||
get => GetValue(AllowHalfProperty);
|
||||
set => SetValue(AllowHalfProperty, value);
|
||||
}
|
||||
|
||||
public object Character
|
||||
{
|
||||
get => GetValue(CharacterProperty);
|
||||
set => SetValue(CharacterProperty, value);
|
||||
}
|
||||
|
||||
public int Count
|
||||
{
|
||||
get => GetValue(CountProperty);
|
||||
set => SetValue(CountProperty, value);
|
||||
}
|
||||
|
||||
public double DefaultValue
|
||||
{
|
||||
get => GetValue(DefaultValueProperty);
|
||||
set => SetValue(DefaultValueProperty, value);
|
||||
}
|
||||
|
||||
public double Size
|
||||
{
|
||||
get => GetValue(SizeProperty);
|
||||
set => SetValue(SizeProperty, value);
|
||||
}
|
||||
|
||||
public IDataTemplate? ItemTemplate
|
||||
{
|
||||
get => GetValue(ItemTemplateProperty);
|
||||
set => SetValue(ItemTemplateProperty, value);
|
||||
}
|
||||
|
||||
public static readonly DirectProperty<Rating, AvaloniaList<RatingCharacter>> ItemsProperty =
|
||||
AvaloniaProperty.RegisterDirect<Rating, AvaloniaList<RatingCharacter>>(
|
||||
nameof(Items), o => o.Items);
|
||||
|
||||
private AvaloniaList<RatingCharacter> _items = null!;
|
||||
|
||||
public AvaloniaList<RatingCharacter> Items
|
||||
{
|
||||
get => _items;
|
||||
private set => SetAndRaise(ItemsProperty, ref _items, value);
|
||||
}
|
||||
|
||||
public Rating()
|
||||
{
|
||||
Items = [];
|
||||
}
|
||||
|
||||
static Rating()
|
||||
{
|
||||
ValueProperty.Changed.AddClassHandler<Rating>((s, e) => s.OnValueChanged(e));
|
||||
CountProperty.Changed.AddClassHandler<Rating>((s, e) => s.OnCountChanged(e));
|
||||
AllowHalfProperty.Changed.AddClassHandler<Rating>((s, e) => s.OnAllowHalfChanged(e));
|
||||
}
|
||||
|
||||
private void OnValueChanged(AvaloniaPropertyChangedEventArgs e)
|
||||
{
|
||||
if (!IsLoaded) return;
|
||||
if (e.NewValue is double newValue)
|
||||
{
|
||||
UpdateItemsByValue(newValue);
|
||||
}
|
||||
}
|
||||
|
||||
private void OnCountChanged(AvaloniaPropertyChangedEventArgs e)
|
||||
{
|
||||
if (!IsLoaded) return;
|
||||
var currentCount = Items.Count;
|
||||
var newCount = e.GetNewValue<int>();
|
||||
|
||||
if (currentCount < newCount)
|
||||
{
|
||||
var itemsToAdd = newCount - currentCount;
|
||||
for (var i = 0; i < itemsToAdd; i++)
|
||||
{
|
||||
Items.Add(new RatingCharacter
|
||||
{
|
||||
Character = Character,
|
||||
AllowHalf = AllowHalf,
|
||||
Size = Size,
|
||||
});
|
||||
}
|
||||
}
|
||||
else if (currentCount > newCount)
|
||||
{
|
||||
var itemsToRemove = currentCount - newCount;
|
||||
for (var i = 0; i < itemsToRemove && currentCount > i; i++)
|
||||
{
|
||||
Items.RemoveAt(currentCount - i - 1);
|
||||
}
|
||||
}
|
||||
|
||||
UpdateItemsByValue(Value);
|
||||
}
|
||||
|
||||
private void OnAllowHalfChanged(AvaloniaPropertyChangedEventArgs e)
|
||||
{
|
||||
if (!IsLoaded) return;
|
||||
if (e.NewValue is not bool newValue) return;
|
||||
foreach (var item in Items)
|
||||
{
|
||||
item.AllowHalf = newValue;
|
||||
}
|
||||
|
||||
UpdateItemsByValue(Value);
|
||||
}
|
||||
|
||||
protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
|
||||
{
|
||||
base.OnApplyTemplate(e);
|
||||
for (var i = 0; i < Count; i++)
|
||||
{
|
||||
Items.Add(new RatingCharacter
|
||||
{
|
||||
Character = Character,
|
||||
AllowHalf = AllowHalf,
|
||||
Size = Size,
|
||||
}
|
||||
);
|
||||
}
|
||||
|
||||
SetCurrentValue(ValueProperty, DefaultValue);
|
||||
}
|
||||
|
||||
protected override void OnLoaded(RoutedEventArgs e)
|
||||
{
|
||||
base.OnLoaded(e);
|
||||
UpdateItemsByValue(DefaultValue);
|
||||
}
|
||||
|
||||
internal void PointerEnteredHandler(RatingCharacter o)
|
||||
{
|
||||
var item = Items.FirstOrDefault(item => item.IsLast);
|
||||
if (item is not null)
|
||||
{
|
||||
item.IsHalf = false;
|
||||
}
|
||||
|
||||
var index = Items.IndexOf(o);
|
||||
UpdateItemsByIndex(index);
|
||||
}
|
||||
|
||||
internal void PointerReleasedHandler(RatingCharacter o)
|
||||
{
|
||||
var index = Items.IndexOf(o);
|
||||
double newValue = index + 1;
|
||||
if (AllowHalf && o.IsHalf)
|
||||
{
|
||||
newValue = index + 0.5;
|
||||
}
|
||||
|
||||
if (AllowClear && Math.Abs(Value - newValue) < double.Epsilon)
|
||||
{
|
||||
SetCurrentValue(ValueProperty, 0);
|
||||
}
|
||||
else
|
||||
{
|
||||
SetCurrentValue(ValueProperty, newValue);
|
||||
}
|
||||
}
|
||||
|
||||
internal void UpdateItemsByValue(double newValue)
|
||||
{
|
||||
RestorePreviousLastItem();
|
||||
var index = (int)Math.Ceiling(newValue - 1);
|
||||
UpdateItemsByIndex(index);
|
||||
UpdateChosenItem(newValue);
|
||||
}
|
||||
|
||||
private void RestorePreviousLastItem()
|
||||
{
|
||||
if (!AllowHalf) return;
|
||||
var item = Items.FirstOrDefault(item => item.IsLast);
|
||||
if (item is null) return;
|
||||
item.Ratio = 1;
|
||||
item.ApplyRatio();
|
||||
}
|
||||
|
||||
private void UpdateItemsByIndex(int index)
|
||||
{
|
||||
for (var i = 0; i < Items.Count; i++)
|
||||
{
|
||||
Items[i].SetSelectedState(i <= index);
|
||||
Items[i].IsLast = i == index;
|
||||
}
|
||||
}
|
||||
|
||||
private void UpdateChosenItem(double newValue)
|
||||
{
|
||||
var item = Items.FirstOrDefault(item => item.IsLast);
|
||||
if (item is null) return;
|
||||
var ratio = newValue - Math.Floor(newValue);
|
||||
var isFraction = ratio >= double.Epsilon;
|
||||
item.SetSelectedState(AllowHalf || !isFraction);
|
||||
item.Ratio = AllowHalf && isFraction ? ratio : 1;
|
||||
item.ApplyRatio();
|
||||
}
|
||||
}
|
||||
114
src/Ursa/Controls/Rating/RatingCharacter.cs
Normal file
114
src/Ursa/Controls/Rating/RatingCharacter.cs
Normal file
@@ -0,0 +1,114 @@
|
||||
using Avalonia;
|
||||
using Avalonia.Controls;
|
||||
using Avalonia.Controls.Metadata;
|
||||
using Avalonia.Controls.Primitives;
|
||||
using Avalonia.Input;
|
||||
using Avalonia.Interactivity;
|
||||
using Avalonia.LogicalTree;
|
||||
|
||||
namespace Ursa.Controls;
|
||||
|
||||
[PseudoClasses(PC_Selected)]
|
||||
[TemplatePart(PART_IconBorder, typeof(Border))]
|
||||
public class RatingCharacter : TemplatedControl
|
||||
{
|
||||
public const string PART_IconBorder = "PART_IconBorder";
|
||||
protected const string PC_Selected = ":selected";
|
||||
|
||||
private Border? _icon;
|
||||
|
||||
public static readonly StyledProperty<bool> AllowHalfProperty =
|
||||
Rating.AllowHalfProperty.AddOwner<RatingCharacter>();
|
||||
|
||||
public static readonly StyledProperty<object> CharacterProperty =
|
||||
Rating.CharacterProperty.AddOwner<RatingCharacter>();
|
||||
|
||||
public static readonly StyledProperty<double> SizeProperty =
|
||||
Rating.SizeProperty.AddOwner<RatingCharacter>();
|
||||
|
||||
public bool AllowHalf
|
||||
{
|
||||
get => GetValue(AllowHalfProperty);
|
||||
set => SetValue(AllowHalfProperty, value);
|
||||
}
|
||||
|
||||
public object Character
|
||||
{
|
||||
get => GetValue(CharacterProperty);
|
||||
set => SetValue(CharacterProperty, value);
|
||||
}
|
||||
|
||||
public double Size
|
||||
{
|
||||
get => GetValue(SizeProperty);
|
||||
set => SetValue(SizeProperty, value);
|
||||
}
|
||||
|
||||
internal bool IsLast { get; set; }
|
||||
|
||||
private bool _isHalf;
|
||||
|
||||
internal bool IsHalf
|
||||
{
|
||||
get => _isHalf;
|
||||
set
|
||||
{
|
||||
if (!AllowHalf) return;
|
||||
_isHalf = value;
|
||||
if (_icon is null) return;
|
||||
_icon.Width = value ? Bounds.Width * 0.5 : Bounds.Width;
|
||||
}
|
||||
}
|
||||
|
||||
internal double Ratio { get; set; } = 1;
|
||||
|
||||
protected override void OnLoaded(RoutedEventArgs e)
|
||||
{
|
||||
base.OnLoaded(e);
|
||||
ApplyRatio();
|
||||
}
|
||||
|
||||
protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
|
||||
{
|
||||
base.OnApplyTemplate(e);
|
||||
_icon = e.NameScope.Find<Border>(PART_IconBorder);
|
||||
}
|
||||
|
||||
protected override void OnPointerEntered(PointerEventArgs e)
|
||||
{
|
||||
var parent = this.GetLogicalAncestors().OfType<Rating>().FirstOrDefault();
|
||||
parent?.PointerEnteredHandler(this);
|
||||
}
|
||||
|
||||
protected override void OnPointerMoved(PointerEventArgs e)
|
||||
{
|
||||
if (!AllowHalf) return;
|
||||
var p = e.GetPosition(this);
|
||||
IsHalf = p.X < Bounds.Width * 0.5;
|
||||
}
|
||||
|
||||
protected override void OnPointerExited(PointerEventArgs e)
|
||||
{
|
||||
var parent = this.GetLogicalAncestors().OfType<Rating>().FirstOrDefault();
|
||||
parent?.UpdateItemsByValue(parent.Value);
|
||||
}
|
||||
|
||||
protected override void OnPointerReleased(PointerReleasedEventArgs e)
|
||||
{
|
||||
var parent = this.GetLogicalAncestors().OfType<Rating>().FirstOrDefault();
|
||||
parent?.PointerReleasedHandler(this);
|
||||
}
|
||||
|
||||
internal void SetSelectedState(bool value)
|
||||
{
|
||||
PseudoClasses.Set(PC_Selected, value);
|
||||
}
|
||||
|
||||
internal void ApplyRatio()
|
||||
{
|
||||
if (_icon is not null)
|
||||
{
|
||||
_icon.Width = Bounds.Width * Ratio;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user