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
|
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2005 Novell, Inc.
//
// Authors:
// Jackson Harper jackson@ximian.com
using System;
using System.Collections;
using System.ComponentModel;
namespace System.Windows.Forms {
public class PropertyManager : BindingManagerBase {
internal string property_name;
private PropertyDescriptor prop_desc;
private object data_source;
private EventDescriptor changed_event;
private EventHandler property_value_changed_handler;
public PropertyManager() {
}
internal PropertyManager (object data_source)
{
SetDataSource (data_source);
}
internal PropertyManager (object data_source, string property_name)
{
this.property_name = property_name;
SetDataSource (data_source);
}
internal void SetDataSource (object new_data_source)
{
if (changed_event != null)
changed_event.RemoveEventHandler (data_source, property_value_changed_handler);
data_source = new_data_source;
if (property_name != null) {
prop_desc = TypeDescriptor.GetProperties (data_source).Find (property_name, true);
if (prop_desc == null)
return;
changed_event = TypeDescriptor.GetEvents (data_source).Find (property_name + "Changed", false);
if (changed_event != null) {
property_value_changed_handler = new EventHandler (PropertyValueChanged);
changed_event.AddEventHandler (data_source, property_value_changed_handler);
}
}
}
void PropertyValueChanged (object sender, EventArgs args)
{
OnCurrentChanged (args);
}
public override object Current {
get { return prop_desc == null ? data_source : prop_desc.GetValue (data_source); }
}
public override int Position {
get { return 0; }
set { /* Doesn't do anything on MS" */ }
}
public override int Count {
get { return 1; }
}
public override void AddNew ()
{
throw new NotSupportedException ("AddNew is not supported for property to property binding");
}
public override void CancelCurrentEdit ()
{
IEditableObject editable = data_source as IEditableObject;
if (editable == null)
return;
editable.CancelEdit ();
PushData ();
}
public override void EndCurrentEdit ()
{
PullData ();
IEditableObject editable = data_source as IEditableObject;
if (editable == null)
return;
editable.EndEdit ();
}
// Hide this method from the 2.0 public API
internal override PropertyDescriptorCollection GetItemPropertiesInternal ()
{
return TypeDescriptor.GetProperties (data_source);
}
public override void RemoveAt (int index)
{
throw new NotSupportedException ("RemoveAt is not supported for property to property binding");
}
public override void ResumeBinding ()
{
}
public override void SuspendBinding ()
{
}
internal override bool IsSuspended {
get { return data_source == null; }
}
protected internal override string GetListName (ArrayList listAccessors)
{
return String.Empty;
}
[MonoTODO ("Stub, does nothing")]
protected override void UpdateIsBinding ()
{
}
protected internal override void OnCurrentChanged (EventArgs ea)
{
PushData ();
if (onCurrentChangedHandler != null) {
onCurrentChangedHandler (this, ea);
}
}
protected override void OnCurrentItemChanged (EventArgs ea)
{
throw new NotImplementedException ();
}
}
}
|
