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
|
<?php
/**
* THiddenField class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.xisc.com/
* @copyright Copyright © 2004-2005, Qiang Xue
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
*/
/**
* THiddenField class
*
* THiddenField displays a hidden input field on a Web page.
* The value of the input field can be accessed via {@link getValue Value} property.
* If upon postback the value is changed, a {@link onValueChanged ValueChanged}
* event will be raised.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
* @since 3.0
*/
class THiddenField extends TControl implements IPostBackDataHandler
{
/**
* @return string tag name of the hidden field.
*/
protected function getTagName()
{
return 'input';
}
/**
* Sets focus to this control.
* This method overrides the parent implementation by forbidding setting focus to this control.
*/
public function focus()
{
throw new TNotSupportedException('hiddenfield_focus_unsupported');
}
/**
* Renders the control.
* This method overrides the parent implementation by rendering
* the hidden field input element.
* @param THtmlWriter the writer used for the rendering purpose
*/
protected function render($writer)
{
$uniqueID=$this->getUniqueID();
$page=$this->getPage();
$page->ensureRenderInForm($this);
//$page->getClientScript()->registerForEventValidation($uniqueID);
$writer->addAttribute('type','hidden');
if($uniqueID!=='')
$writer->addAttribute('name',$uniqueID);
if($this->getID()!=='')
$writer->addAttribute('id',$this->getClientID());
if(($value=$this->getValue())!=='')
$writer->addAttribute('value',$value);
$writer->renderBeginTag('input');
$writer->renderEndTag();
}
/**
* Loads hidden field data.
* This method is primarly used by framework developers.
* @param string the key that can be used to retrieve data from the input data collection
* @param array the input data collection
* @return boolean whether the data of the component has been changed
*/
public function loadPostData($key,$values)
{
$value=$values[$key];
if($value===$this->getValue())
return false;
else
{
$this->setValue($value);
return true;
}
}
/**
* Raises postdata changed event.
* This method calls {@link onValueChanged} method.
* This method is primarly used by framework developers.
*/
public function raisePostDataChangedEvent()
{
$this->onValueChanged(null);
}
/**
* This method is invoked when the value of the {@link getValue Value} property changes between posts to the server.
* The method raises 'ValueChanged' event to fire up the event delegates.
* If you override this method, be sure to call the parent implementation
* so that the attached event handlers can be invoked.
* @param TEventParameter event parameter to be passed to the event handlers
*/
public function onValueChanged($param)
{
$this->raiseEvent('ValueChanged',$this,$param);
}
/**
* @return string the value of the THiddenField
*/
public function getValue()
{
return $this->getViewState('Value','');
}
/**
* Sets the value of the THiddenField
* @param string the value to be set
*/
public function setValue($value)
{
$this->setViewState('Value',$value,'');
}
/**
* @return boolean whether theming is enabled for this control. Defaults to false.
*/
public function getEnableTheming()
{
return false;
}
/**
* @param boolean whether theming is enabled for this control.
* @throws TNotSupportedException This method is always thrown when calling this method.
*/
public function setEnableTheming($value)
{
throw new TNotSupportedException('hiddenfield_theming_unsupported');
}
/**
* @param string Skin ID
* @throws TNotSupportedException This method is always thrown when calling this method.
*/
public function setSkinID($value)
{
throw new TNotSupportedException('hiddenfield_skinid_unsupported');
}
}
?>
|
