89 lines
2.2 KiB
C#
89 lines
2.2 KiB
C#
using Ooui.Forms.Extensions;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Linq;
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using Xamarin.Forms;
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using Xamarin.Forms.Internals;
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namespace Ooui.Forms.Renderers
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{
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public class PickerRenderer : ViewRenderer<Picker, Select>
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{
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private bool _disposed;
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private Select _select;
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public PickerRenderer()
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{
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}
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protected override void OnElementChanged(ElementChangedEventArgs<Picker> e)
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{
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if (e.NewElement != null)
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{
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if (Control == null)
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{
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_select = new Select();
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_select.Change += _select_Change;
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SetNativeControl(_select);
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}
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UpdateItems();
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UpdateBackgroundColor();
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}
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base.OnElementChanged(e);
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}
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private void _select_Change(object sender, TargetEventArgs e)
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{
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Element.SetValueFromRenderer(Picker.SelectedIndexProperty, Element.ItemsSource.IndexOf(_select.Value));
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}
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protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
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{
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base.OnElementPropertyChanged(sender, e);
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if (e.PropertyName == Picker.ItemsSourceProperty.PropertyName)
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{
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UpdateItems();
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}
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}
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protected override void Dispose(bool disposing)
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{
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base.Dispose(disposing);
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if (disposing && !_disposed)
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{
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_select.Change -= _select_Change;
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_disposed = true;
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}
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}
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private void UpdateBackgroundColor()
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{
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var backgroundColor = Element.BackgroundColor.ToOouiColor(Colors.Clear);
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_select.Style.BackgroundColor = backgroundColor;
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}
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private void UpdateItems()
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{
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var items = Element.ItemsSource;
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if (items != null)
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{
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foreach (var item in items)
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{
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var s = item.ToString();
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_select.AddOption(s, s);
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}
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}
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}
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}
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}
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