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using System;
using System.ComponentModel;
using AppKit;
using Foundation;
namespace Xamarin.Forms.Platform.MacOS
{
public class DatePickerRenderer : ViewRenderer<DatePicker, NSDatePicker>
{
NSDatePicker _picker;
NSColor _defaultTextColor;
NSColor _defaultBackgroundColor;
bool _disposed;
IElementController ElementController => Element;
protected override void OnElementChanged(ElementChangedEventArgs<DatePicker> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{
if (Control == null)
{
_picker = new NSDatePicker
{
DatePickerMode = NSDatePickerMode.Single,
TimeZone = new NSTimeZone("UTC"),
DatePickerStyle = NSDatePickerStyle.TextFieldAndStepper,
DatePickerElements = NSDatePickerElementFlags.YearMonthDateDay
};
_picker.ValidateProposedDateValue += HandleValueChanged;
_defaultTextColor = _picker.TextColor;
_defaultBackgroundColor = _picker.BackgroundColor;
SetNativeControl(_picker);
}
}
UpdateDateFromModel();
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();
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();
}
protected override void Dispose(bool disposing)
{
if (disposing && !_disposed)
{
if (_picker != null)
_picker.ValidateProposedDateValue -= HandleValueChanged;
_disposed = true;
}
base.Dispose(disposing);
}
protected override void SetBackgroundColor(Color color)
{
base.SetBackgroundColor(color);
if (Control == null)
return;
if (color == Color.Default)
Control.BackgroundColor = _defaultBackgroundColor;
else
Control.BackgroundColor = color.ToNSColor();
}
void HandleValueChanged(object sender, NSDatePickerValidatorEventArgs e)
{
if (Control == null || Element == null)
return;
ElementController?.SetValueFromRenderer(DatePicker.DateProperty, _picker.DateValue.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()
{
if (Control == null || Element == null)
return;
if (_picker.DateValue.ToDateTime().Date != Element.Date.Date)
_picker.DateValue = Element.Date.ToNSDate();
}
void UpdateMaximumDate()
{
if (Control == null || Element == null)
return;
_picker.MaxDate = Element.MaximumDate.ToNSDate();
}
void UpdateMinimumDate()
{
if (Control == null || Element == null)
return;
_picker.MinDate = Element.MinimumDate.ToNSDate();
}
void UpdateTextColor()
{
if (Control == null || Element == null)
return;
var textColor = Element.TextColor;
if (textColor.IsDefault || !Element.IsEnabled)
Control.TextColor = _defaultTextColor;
else
Control.TextColor = textColor.ToNSColor();
}
}
}
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