blob: 39fe78352741320aa3730ef90cace6c99da2d2c4 (
plain)
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
|
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;
namespace Tango.SharedUI.Commands
{
/// <summary>
/// RelayCommand is a very easy-to-use implementation of ICommand. You can use a RelayCommand to expose viewmodel functionality as a command, and
/// supply the condition that determines the command's availability. A control in the view bound to a command can execute an available command will</summary>
/// update its enabled state in response to the availability of the command.
/// <seealso cref="System.Windows.Input.ICommand" />
public sealed class RelayCommand : ICommand
{
#region fields
readonly Predicate<object> canExecute;
readonly Action<object> execute;
#endregion fields
#region constructors
public RelayCommand(Action<object> execute) : this(execute, null) { }
public RelayCommand(Action<object> execute, Predicate<object> canExecute)
{
this.execute = execute;
this.canExecute = canExecute;
}
public RelayCommand(Action execute)
: this((x) => execute())
{
}
public RelayCommand(Action execute, Predicate<object> canExecute)
: this((x) => execute(), canExecute)
{
}
#endregion constructors
#region methods
public void RaiseCanExecuteChanged()
{
if (this.CanExecuteChanged != null)
{
this.CanExecuteChanged(this, EventArgs.Empty);
}
}
#endregion methods
#region ICommand events
public event EventHandler CanExecuteChanged;
#endregion ICommand events
#region ICommand methods
public bool CanExecute(object parameter)
{
return this.canExecute != null ? this.canExecute(parameter) : true;
}
public void Execute(object parameter)
{
if (this.execute != null)
{
this.execute(parameter);
}
}
#endregion ICommand methods
}
public sealed class RelayCommand<T> : ICommand
{
#region fields
readonly Predicate<object> canExecute;
readonly Action<T> execute;
#endregion fields
#region constructors
public RelayCommand(Action<T> execute) : this(execute, null) { }
public RelayCommand(Action<T> execute, Predicate<object> canExecute)
{
this.execute = execute;
this.canExecute = canExecute;
}
public RelayCommand(Action execute)
: this((x) => execute())
{
}
#endregion constructors
#region methods
public void RaiseCanExecuteChanged()
{
if (this.CanExecuteChanged != null)
{
this.CanExecuteChanged(this, EventArgs.Empty);
}
}
#endregion methods
#region ICommand events
public event EventHandler CanExecuteChanged;
#endregion ICommand events
#region ICommand methods
public bool CanExecute(object parameter)
{
return this.canExecute != null ? this.canExecute(parameter) : true;
}
public void Execute(object parameter)
{
if (this.execute != null)
{
this.execute((T)parameter);
}
}
#endregion ICommand methods
}
}
|
