зеркало из https://github.com/DeGsoft/maui-linux.git
85 строки
2.2 KiB
C#
85 строки
2.2 KiB
C#
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using System;
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using Xamarin.Forms.Platform;
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namespace Xamarin.Forms
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{
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[RenderWith(typeof(_SliderRenderer))]
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public class Slider : View
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{
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public static readonly BindableProperty MinimumProperty = BindableProperty.Create("Minimum", typeof(double), typeof(Slider), 0d, validateValue: (bindable, value) =>
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{
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var slider = (Slider)bindable;
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return (double)value < slider.Maximum;
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}, coerceValue: (bindable, value) =>
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{
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var slider = (Slider)bindable;
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slider.Value = slider.Value.Clamp((double)value, slider.Maximum);
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return value;
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});
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public static readonly BindableProperty MaximumProperty = BindableProperty.Create("Maximum", typeof(double), typeof(Slider), 1d, validateValue: (bindable, value) =>
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{
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var slider = (Slider)bindable;
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return (double)value > slider.Minimum;
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}, coerceValue: (bindable, value) =>
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{
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var slider = (Slider)bindable;
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slider.Value = slider.Value.Clamp(slider.Minimum, (double)value);
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return value;
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});
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public static readonly BindableProperty ValueProperty = BindableProperty.Create("Value", typeof(double), typeof(Slider), 0d, BindingMode.TwoWay, coerceValue: (bindable, value) =>
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{
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var slider = (Slider)bindable;
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return ((double)value).Clamp(slider.Minimum, slider.Maximum);
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}, propertyChanged: (bindable, oldValue, newValue) =>
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{
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var slider = (Slider)bindable;
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EventHandler<ValueChangedEventArgs> eh = slider.ValueChanged;
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if (eh != null)
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eh(slider, new ValueChangedEventArgs((double)oldValue, (double)newValue));
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});
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public Slider()
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{
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}
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public Slider(double min, double max, double val)
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{
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if (min >= max)
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throw new ArgumentOutOfRangeException("min");
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if (max > Minimum)
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{
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Maximum = max;
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Minimum = min;
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}
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else
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{
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Minimum = min;
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Maximum = max;
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}
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Value = val.Clamp(min, max);
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}
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public double Maximum
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{
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get { return (double)GetValue(MaximumProperty); }
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set { SetValue(MaximumProperty, value); }
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}
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public double Minimum
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{
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get { return (double)GetValue(MinimumProperty); }
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set { SetValue(MinimumProperty, value); }
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}
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public double Value
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{
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get { return (double)GetValue(ValueProperty); }
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set { SetValue(ValueProperty, value); }
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}
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public event EventHandler<ValueChangedEventArgs> ValueChanged;
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}
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}
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