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
|
<?php
/**
* TActiveImageButton class file.
*
* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package System.Web.UI.ActiveControls
*/
/**
* TActiveImageButton class.
*
* TActiveImageButton is the active control counter part to TImageButton.
* When a TActiveImageButton is clicked, rather than a normal post back request a
* callback request is initiated.
*
* The {@link onCallback OnCallback} event is raised during a callback request
* and it is raise <b>after</b> the {@link onClick OnClick} event.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @package System.Web.UI.ActiveControls
* @since 3.1
*/
class TActiveImageButton extends TImageButton implements IActiveControl, ICallbackEventHandler
{
/**
* Creates a new callback control, sets the adapter to
* TActiveControlAdapter. If you override this class, be sure to set the
* adapter appropriately by, for example, by calling this constructor.
*/
public function __construct()
{
parent::__construct();
$this->setAdapter(new TActiveControlAdapter($this));
}
/**
* @return TBaseActiveControl basic active control options.
*/
public function getActiveControl()
{
return $this->getAdapter()->getBaseActiveControl();
}
/**
* @return TCallbackClientSide client side request options.
*/
public function getClientSide()
{
return $this->getAdapter()->getBaseActiveControl()->getClientSide();
}
/**
* Sets the alternative text to be displayed in the TImage when the image is unavailable.
* @param string the alternative text
*/
public function setAlternateText($value)
{
parent::setAlternateText($value);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->setAttribute($this, 'alt', $value);
}
/**
* Sets the alignment of the image with respective to other elements on the page.
* Possible values include: absbottom, absmiddle, baseline, bottom, left,
* middle, right, texttop, and top. If an empty string is passed in,
* imagealign attribute will not be rendered.
* @param string the alignment of the image
*/
public function setImageAlign($value)
{
parent::setImageAlign($value);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->setAttribute($this, 'align', $value);
}
/**
* @param string the URL of the image file
*/
public function setImageUrl($value)
{
parent::setImageUrl($value);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->setAttribute($this, 'src', $value);
}
/**
* @param string the URL to the long description of the image.
*/
public function setDescriptionUrl($value)
{
parent::setDescriptionUrl($value);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->setAttribute($this, 'longdesc', $value);
}
/**
* Raises the callback event. This method is required by
* {@link ICallbackEventHandler ICallbackEventHandler} interface. If
* {@link getCausesValidation CausesValidation} is true, it will invoke the page's
* {@link TPage::validate} method first. It will raise
* {@link onClick OnClick} event first and then the {@link onCallback OnCallback} event.
* This method is mainly used by framework and control developers.
* @param TCallbackEventParameter the event parameter
*/
public function raiseCallbackEvent($param)
{
$this->raisePostBackEvent($param);
$this->onCallback($param);
}
/**
* This method is invoked when a callback is requested. The method raises
* 'OnCallback' event to fire up the event handlers. If you override this
* method, be sure to call the parent implementation so that the event
* handler can be invoked.
* @param TCallbackEventParameter event parameter to be passed to the event handlers
*/
public function onCallback($param)
{
$this->raiseEvent('OnCallback', $this, $param);
}
/**
* Override parent implementation, no javascript is rendered here instead
* the javascript required for active control is registered in {@link addAttributesToRender}.
*/
protected function renderClientControlScript($writer)
{
}
/**
* Register the x and y hidden input names of the position clicked.
* @param THtmlWriter the renderer.
*/
public function onPreRender($writer)
{
parent::onPreRender($writer);
$uid = $uid=$this->getUniqueID();
$this->getPage()->registerPostDataLoader($uid.'_x');
$this->getPage()->registerPostDataLoader($uid.'_y');
}
/**
* Ensure that the ID attribute is rendered and registers the javascript code
* for initializing the active control.
*/
protected function addAttributesToRender($writer)
{
parent::addAttributesToRender($writer);
$writer->addAttribute('id',$this->getClientID());
$this->getActiveControl()->registerCallbackClientScript(
$this->getClientClassName(), $this->getPostBackOptions());
}
/**
* @return string corresponding javascript class name for this TActiveLinkButton.
*/
protected function getClientClassName()
{
return 'Prado.WebUI.TActiveImageButton';
}
}
|
