1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
using System;
using System.Drawing;
using System.ComponentModel;
#if __UNIFIED__
using UIKit;
using Foundation;
#else
using MonoTouch.UIKit;
using MonoTouch.Foundation;
#endif
#if __UNIFIED__
using RectangleF = CoreGraphics.CGRect;
using SizeF = CoreGraphics.CGSize;
using PointF = CoreGraphics.CGPoint;
#else
using nfloat=System.Single;
using nint=System.Int32;
using nuint=System.UInt32;
#endif
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;
IElementController ElementController => Element as IElementController;
protected override void OnElementChanged(ElementChangedEventArgs<DatePicker> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{
var entry = new NoCaretField { BorderStyle = UITextBorderStyle.RoundedRect };
entry.Started += OnStarted;
entry.Ended += 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);
}
if (e.NewElement != null)
{
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();
}
}
}
|
