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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
using System;
using System.ComponentModel;
using System.Windows.Input;
using Xamarin.Forms.Internals;
using Xamarin.Forms.Platform;
namespace Xamarin.Forms
{
[RenderWith(typeof(_SearchBarRenderer))]
public class SearchBar : View, IFontElement, ITextElement, ISearchBarController, IElementConfiguration<SearchBar>
{
public static readonly BindableProperty SearchCommandProperty = BindableProperty.Create("SearchCommand", typeof(ICommand), typeof(SearchBar), null, propertyChanged: OnCommandChanged);
public static readonly BindableProperty SearchCommandParameterProperty = BindableProperty.Create("SearchCommandParameter", typeof(object), typeof(SearchBar), null);
public static readonly BindableProperty TextProperty = BindableProperty.Create("Text", typeof(string), typeof(SearchBar), default(string), BindingMode.TwoWay,
propertyChanged: (bindable, oldValue, newValue) =>
{
var searchBar = (SearchBar)bindable;
EventHandler<TextChangedEventArgs> eh = searchBar.TextChanged;
if (eh != null)
eh(searchBar, new TextChangedEventArgs((string)oldValue, (string)newValue));
});
public static readonly BindableProperty CancelButtonColorProperty = BindableProperty.Create("CancelButtonColor", typeof(Color), typeof(SearchBar), default(Color));
public static readonly BindableProperty PlaceholderProperty = BindableProperty.Create("Placeholder", typeof(string), typeof(SearchBar), null);
public static readonly BindableProperty FontFamilyProperty = FontElement.FontFamilyProperty;
public static readonly BindableProperty FontSizeProperty = FontElement.FontSizeProperty;
public static readonly BindableProperty FontAttributesProperty = FontElement.FontAttributesProperty;
public static readonly BindableProperty HorizontalTextAlignmentProperty = BindableProperty.Create("HorizontalTextAlignment", typeof(TextAlignment), typeof(SearchBar), TextAlignment.Start);
public static readonly BindableProperty TextColorProperty = TextElement.TextColorProperty;
public static readonly BindableProperty PlaceholderColorProperty = BindableProperty.Create("PlaceholderColor", typeof(Color), typeof(SearchBar), Color.Default);
readonly Lazy<PlatformConfigurationRegistry<SearchBar>> _platformConfigurationRegistry;
public Color CancelButtonColor
{
get { return (Color)GetValue(CancelButtonColorProperty); }
set { SetValue(CancelButtonColorProperty, value); }
}
public TextAlignment HorizontalTextAlignment
{
get { return (TextAlignment)GetValue(HorizontalTextAlignmentProperty); }
set { SetValue(HorizontalTextAlignmentProperty, value); }
}
public string Placeholder
{
get { return (string)GetValue(PlaceholderProperty); }
set { SetValue(PlaceholderProperty, value); }
}
public Color PlaceholderColor
{
get { return (Color)GetValue(PlaceholderColorProperty); }
set { SetValue(PlaceholderColorProperty, value); }
}
public ICommand SearchCommand
{
get { return (ICommand)GetValue(SearchCommandProperty); }
set { SetValue(SearchCommandProperty, value); }
}
public object SearchCommandParameter
{
get { return GetValue(SearchCommandParameterProperty); }
set { SetValue(SearchCommandParameterProperty, value); }
}
public string Text
{
get { return (string)GetValue(TextProperty); }
set { SetValue(TextProperty, value); }
}
public Color TextColor
{
get { return (Color)GetValue(TextElement.TextColorProperty); }
set { SetValue(TextElement.TextColorProperty, value); }
}
bool IsEnabledCore
{
set { SetValueCore(IsEnabledProperty, value); }
}
public FontAttributes FontAttributes
{
get { return (FontAttributes)GetValue(FontAttributesProperty); }
set { SetValue(FontAttributesProperty, value); }
}
public string FontFamily
{
get { return (string)GetValue(FontFamilyProperty); }
set { SetValue(FontFamilyProperty, value); }
}
[TypeConverter(typeof(FontSizeConverter))]
public double FontSize
{
get { return (double)GetValue(FontSizeProperty); }
set { SetValue(FontSizeProperty, value); }
}
void IFontElement.OnFontFamilyChanged(string oldValue, string newValue)
{
}
void IFontElement.OnFontSizeChanged(double oldValue, double newValue)
{
}
double IFontElement.FontSizeDefaultValueCreator() =>
Device.GetNamedSize(NamedSize.Default, (SearchBar)this);
void IFontElement.OnFontAttributesChanged(FontAttributes oldValue, FontAttributes newValue)
{
}
void IFontElement.OnFontChanged(Font oldValue, Font newValue)
{
}
public event EventHandler SearchButtonPressed;
public event EventHandler<TextChangedEventArgs> TextChanged;
public SearchBar()
{
_platformConfigurationRegistry = new Lazy<PlatformConfigurationRegistry<SearchBar>>(() => new PlatformConfigurationRegistry<SearchBar>(this));
}
[EditorBrowsable(EditorBrowsableState.Never)]
public void OnSearchButtonPressed()
{
ICommand cmd = SearchCommand;
if (cmd != null && !cmd.CanExecute(SearchCommandParameter))
return;
cmd?.Execute(SearchCommandParameter);
SearchButtonPressed?.Invoke(this, EventArgs.Empty);
}
void CommandCanExecuteChanged(object sender, EventArgs eventArgs)
{
ICommand cmd = SearchCommand;
if (cmd != null)
IsEnabledCore = cmd.CanExecute(SearchCommandParameter);
}
static void OnCommandChanged(BindableObject bindable, object oldValue, object newValue)
{
var self = (SearchBar)bindable;
var newCommand = (ICommand)newValue;
var oldCommand = (ICommand)oldValue;
if (oldCommand != null)
{
oldCommand.CanExecuteChanged -= self.CommandCanExecuteChanged;
}
if (newCommand != null)
{
newCommand.CanExecuteChanged += self.CommandCanExecuteChanged;
self.CommandCanExecuteChanged(self, EventArgs.Empty);
}
else
{
self.IsEnabledCore = true;
}
}
public IPlatformElementConfiguration<T, SearchBar> On<T>() where T : IConfigPlatform
{
return _platformConfigurationRegistry.Value.On<T>();
}
void ITextElement.OnTextColorPropertyChanged(Color oldValue, Color newValue)
{
}
}
}
|
