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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
//
// ListBox.cs
//
// Author:
// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2015 jp
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Collections;
using System.Xml.Serialization;
using System.ComponentModel;
//TODO: implement ItemTemplate node in xml
using System.IO;
using System.Diagnostics;
using System.Xml;
using System.Collections.Generic;
using System.Threading;
namespace go
{
[DefaultTemplate("#go.Templates.Listbox.goml")]
//[DefaultTemplate("#go.Templates.ItemTemplate.goml")]
public class ListBox : TemplatedControl, IXmlSerializable
{
#region CTOR
public ListBox () : base() {}
#endregion
Group _list;
IList data;
int _selectedIndex;
string _itemTemplate;
public event EventHandler<SelectionChangeEventArgs> SelectedItemChanged;
#region implemented abstract members of TemplatedControl
protected override void loadTemplate (GraphicObject template = null)
{
base.loadTemplate (template);
_list = this.child.FindByName ("List") as Group;
}
#endregion
[XmlAttributeAttribute][DefaultValue("#go.Templates.ItemTemplate.goml")]
public string ItemTemplate {
get { return _itemTemplate; }
set {
//TODO:reload list with new template?
_itemTemplate = value;
}
}
[XmlAttributeAttribute][DefaultValue(-1)]
public int SelectedIndex{
get { return _selectedIndex; }
set { _selectedIndex = value; }
}
public object SelectedItem{
get { return data == null ? null : data[_selectedIndex]; }
}
[XmlAttributeAttribute][DefaultValue(null)]
public IList Data {
get {
return data;
}
set {
if (loadingInProgress) {
thread.Join ();
Interface.LoadingLists.Remove (this);
pendingChildrenAddition = null;
loadingInProgress = false;
}
data = value;
_list.ClearChildren ();
if (data == null)
return;
pendingChildrenAddition = new Queue<GraphicObject> ();
threadedLoadingFinished = false;
Interface.LoadingLists.Add (this);
thread = new Thread(loadingThread);
loadingInProgress = true;
thread.IsBackground = true;
thread.Start ();
thread.Join ();
}
}
// public override void UpdateLayout (LayoutingType layoutType)
// {
// CheckPendingChildrenAddition ();
// base.UpdateLayout (layoutType);
// }
internal void CheckPendingChildrenAddition()
{
if (!loadingInProgress)
return;
lock (pendingChildrenAddition) {
if (!threadedLoadingFinished && pendingChildrenAddition.Count < 10)
return;
while (pendingChildrenAddition.Count > 0) {
GraphicObject tmp = pendingChildrenAddition.Dequeue ();
tmp.DataSource = tmp.Tag;
tmp.Tag = null;
_list.addChild (tmp);
}
if (threadedLoadingFinished) {
Interface.LoadingLists.Remove (this);
pendingChildrenAddition = null;
loadingInProgress = false;
}
}
}
Queue<GraphicObject> pendingChildrenAddition;
volatile bool threadedLoadingFinished = false;
volatile bool loadingInProgress = false;
Thread thread;
void loadingThread()
{
#if DEBUG_LOAD_TIME
Stopwatch loadingTime = new Stopwatch ();
loadingTime.Start ();
#endif
MemoryStream ms = new MemoryStream ();
lock (ItemTemplate) {
using (Stream stream = Interface.GetStreamFromPath (ItemTemplate))
stream.CopyTo (ms);
}
Type t = Interface.GetTopContainerOfGOMLStream (ms);
foreach (var item in data) {
ms.Seek(0,SeekOrigin.Begin);
GraphicObject g = Interface.Load (ms, t);
g.Tag = item;
g.MouseClick += itemClick;
lock (pendingChildrenAddition) {
pendingChildrenAddition.Enqueue (g);
}
}
ms.Dispose ();
threadedLoadingFinished = true;
#if DEBUG_LOAD_TIME
loadingTime.Stop ();
Debug.WriteLine("Listbox {2} Loading: {0} ticks \t, {1} ms",
loadingTime.ElapsedTicks,
loadingTime.ElapsedMilliseconds, this.ToString());
#endif
}
void itemClick(object sender, OpenTK.Input.MouseButtonEventArgs e){
SelectedItemChanged.Raise (sender, new SelectionChangeEventArgs((sender as GraphicObject).DataSource));
NotifyValueChanged ("SelectedItem", (sender as GraphicObject).DataSource);
//Debug.WriteLine ((sender as GraphicObject).DataSource);
}
#region IXmlSerializable
public override System.Xml.Schema.XmlSchema GetSchema(){ return null; }
public override void ReadXml(System.Xml.XmlReader reader)
{
//Template could be either an attribute containing path or expressed inlined
//as a Template Element
using (System.Xml.XmlReader subTree = reader.ReadSubtree())
{
subTree.Read ();
string template = reader.GetAttribute ("Template");
string tmp = subTree.ReadOuterXml ();
//Load template from path set as attribute in templated control
if (string.IsNullOrEmpty (template)) {
//seek for template tag first
using (XmlReader xr = new XmlTextReader (tmp, XmlNodeType.Element, null)) {
//load template first if inlined
xr.Read (); //skip current node
while (!xr.EOF) {
xr.Read (); //read first child
if (!xr.IsStartElement ())
continue;
if (xr.Name == "Template") {
xr.Read ();
Type t = Type.GetType ("go." + xr.Name);
GraphicObject go = (GraphicObject)Activator.CreateInstance (t);
(go as IXmlSerializable).ReadXml (xr);
loadTemplate (go);
xr.Read ();//go close tag
xr.Read ();//Template close tag
break;
} else {
xr.ReadInnerXml ();
}
}
}
} else
loadTemplate (Interface.Load (template, this, !Interface.DontResoveGOML));
//normal xml read
using (XmlReader xr = new XmlTextReader (tmp, XmlNodeType.Element, null)) {
xr.Read ();
base.ReadXml(xr);
}
}
}
public override void WriteXml(System.Xml.XmlWriter writer)
{
//TODO:
throw new NotImplementedException();
}
#endregion
}
}
|
