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using System;
using System.ComponentModel;
using Foundation;
using UIKit;
using RectangleF = CoreGraphics.CGRect;
namespace Xamarin.Forms.Platform.iOS
{
internal class NoCaretField : UITextField
{
public NoCaretField() : base(new RectangleF())
{
}
public override RectangleF GetCaretRectForPosition(UITextPosition position)
{
return new RectangleF();
}
}
public class DatePickerRenderer : ViewRenderer<DatePicker, UITextField>
{
UIDatePicker _picker;
UIColor _defaultTextColor;
bool _disposed;
IElementController ElementController => Element as IElementController;
protected override void OnElementChanged(ElementChangedEventArgs<DatePicker> e)
{
base.OnElementChanged(e);
if (e.NewElement == null)
return;
if (Control == null)
{
var entry = new NoCaretField { BorderStyle = UITextBorderStyle.RoundedRect };
entry.EditingDidBegin += OnStarted;
entry.EditingDidEnd += OnEnded;
_picker = new UIDatePicker { Mode = UIDatePickerMode.Date, TimeZone = new NSTimeZone("UTC") };
_picker.ValueChanged += HandleValueChanged;
var width = UIScreen.MainScreen.Bounds.Width;
var toolbar = new UIToolbar(new RectangleF(0, 0, width, 44)) { BarStyle = UIBarStyle.Default, Translucent = true };
var spacer = new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace);
var doneButton = new UIBarButtonItem(UIBarButtonSystemItem.Done, (o, a) => entry.ResignFirstResponder());
toolbar.SetItems(new[] { spacer, doneButton }, false);
entry.InputView = _picker;
entry.InputAccessoryView = toolbar;
_defaultTextColor = entry.TextColor;
SetNativeControl(entry);
}
UpdateDateFromModel(false);
UpdateMaximumDate();
UpdateMinimumDate();
UpdateTextColor();
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == DatePicker.DateProperty.PropertyName || e.PropertyName == DatePicker.FormatProperty.PropertyName)
UpdateDateFromModel(true);
else if (e.PropertyName == DatePicker.MinimumDateProperty.PropertyName)
UpdateMinimumDate();
else if (e.PropertyName == DatePicker.MaximumDateProperty.PropertyName)
UpdateMaximumDate();
else if (e.PropertyName == DatePicker.TextColorProperty.PropertyName || e.PropertyName == VisualElement.IsEnabledProperty.PropertyName)
UpdateTextColor();
}
void HandleValueChanged(object sender, EventArgs e)
{
ElementController?.SetValueFromRenderer(DatePicker.DateProperty, _picker.Date.ToDateTime().Date);
}
void OnEnded(object sender, EventArgs eventArgs)
{
ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
}
void OnStarted(object sender, EventArgs eventArgs)
{
ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, true);
}
void UpdateDateFromModel(bool animate)
{
if (_picker.Date.ToDateTime().Date != Element.Date.Date)
_picker.SetDate(Element.Date.ToNSDate(), animate);
Control.Text = Element.Date.ToString(Element.Format);
}
void UpdateMaximumDate()
{
_picker.MaximumDate = Element.MaximumDate.ToNSDate();
}
void UpdateMinimumDate()
{
_picker.MinimumDate = Element.MinimumDate.ToNSDate();
}
void UpdateTextColor()
{
var textColor = Element.TextColor;
if (textColor.IsDefault || !Element.IsEnabled)
Control.TextColor = _defaultTextColor;
else
Control.TextColor = textColor.ToUIColor();
}
protected override void Dispose(bool disposing)
{
if (_disposed)
return;
_disposed = true;
if (disposing)
{
_defaultTextColor = null;
if (_picker != null)
{
_picker.RemoveFromSuperview();
_picker.ValueChanged -= HandleValueChanged;
_picker.Dispose();
_picker = null;
}
if (Control != null)
{
Control.EditingDidBegin -= OnStarted;
Control.EditingDidEnd -= OnEnded;
}
}
base.Dispose(disposing);
}
}
}
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