JavaScript event.keyCode大全

JavaScript event.keyCode大全
keycode 8 = BackSpace BackSpace
keycode 9 = Tab Tab
keycode 12 = Clear
keycode 13 = Enter
keycode 16 = Shift_L
keycode 17 = Control_L
keycode 18 = Alt_L
keycode 19 = Pause
keycode 20 = Caps_Lock
keycode 27 = Escape Escape
keycode 32 = space space
keycode 33 = Prior
keycode 34 = Next
keycode 35 = End
keycode 36 = Home
keycode 37 = Left
keycode 38 = Up
keycode 39 = Right
keycode 40 = Down
keycode 41 = Select
keycode 42 = Print
keycode 43 = Execute
keycode 45 = Insert
keycode 46 = Delete
keycode 47 = Help
keycode 48 = 0 equal braceright
keycode 49 = 1 exclam onesuperior
keycode 50 = 2 quotedbl twosuperior
keycode 51 = 3 section threesuperior
keycode 52 = 4 dollar
keycode 53 = 5 percent
keycode 54 = 6 ampersand
keycode 55 = 7 slash braceleft
keycode 56 = 8 parenleft bracketleft
keycode 57 = 9 parenright bracketright
keycode 65 = a A
keycode 66 = b B
keycode 67 = c C
keycode 68 = d D
keycode 69 = e E EuroSign
keycode 70 = f F
keycode 71 = g G
keycode 72 = h H
keycode 73 = i I
keycode 74 = j J
keycode 75 = k K
keycode 76 = l L
keycode 77 = m M mu
keycode 78 = n N
keycode 79 = o O
keycode 80 = p P
keycode 81 = q Q at
keycode 82 = r R
keycode 83 = s S
keycode 84 = t T
keycode 85 = u U
keycode 86 = v V
keycode 87 = w W
keycode 88 = x X
keycode 89 = y Y
keycode 90 = z Z
keycode 96 = KP_0 KP_0
keycode 97 = KP_1 KP_1
keycode 98 = KP_2 KP_2
keycode 99 = KP_3 KP_3
keycode 100 = KP_4 KP_4
keycode 101 = KP_5 KP_5
keycode 102 = KP_6 KP_6
keycode 103 = KP_7 KP_7
keycode 104 = KP_8 KP_8
keycode 105 = KP_9 KP_9
keycode 106 = KP_Multiply KP_Multiply
keycode 107 = KP_Add KP_Add

keycode 108 = KP_Separator KP_Separator
keycode 109 = KP_Subtract KP_Subtract
keycode 110 = KP_Decimal KP_Decimal
keycode 111 = KP_Divide KP_Divide
keycode 112 = F1
keycode 113 = F2
keycode 114 = F3
keycode 115 = F4
keycode 116 = F5
keycode 117 = F6
keycode 118 = F7
keycode 119 = F8
keycode 120 = F9
keycode 121 = F10
keycode 122 = F11
keycode 123 = F12
keycode 124 = F13
keycode 125 = F14
keycode 126 = F15
keycode 127 = F16
keycode 128 = F17
keycode 129 = F18
keycode 130 = F19
keycode 131 = F20
keycode 132 = F21
keycode 133 = F22
keycode 134 = F23
keycode 135 = F24
keycode 136 = Num_Lock
keycode 137 = Scroll_Lock
keycode 187 = acute grave
keycode 188 = comma semicolon
keycode 189 = minus underscore
keycode 190 = period colon
keycode 192 = numbersign apostrophe
keycode 210 = plusminus hyphen macron
keycode 211 =
keycode 212 = copyright registered
keycode 213 = guillemotleft guillemotright
keycode 214 = masculine ordfeminine
keycode 215 = ae AE
keycode 216 = cent yen
keycode 217 = questiondown exclamdown
keycode 218 = onequarter onehalf threequarters
keycode 220 = less greater bar
keycode 221 = plus asterisk asciitilde
keycode 227 = multiply division

keycode 228 = acircumflex Acircumflex
keycode 229 = ecircumflex Ecircumflex
keycode 230 = icircumflex Icircumflex
keycode 231 = ocircumflex Ocircumflex
keycode 232 = ucircumflex Ucircumflex
keycode 233 = ntilde Ntilde
keycode 234 = yacute Yacute
keycode 235 = oslash Ooblique
keycode 236 = aring Aring
keycode 237 = ccedilla Ccedilla
keycode 238 = thorn THORN
keycode 239 = eth ETH
keycode 240 = diaeresis cedilla currency
keycode 241 = agrave Agrave atilde Atilde
keycode 242 = egrave Egrave
keycode 243 = igrave Igrave
keycode 244 = ograve Ograve otilde Otilde
keycode 245 = ugrave Ugrave
keycode 246 = adiaeresis Adiaeresis
keycode 247 = ediaeresis Ediaeresis
keycode 248 = idiaeresis Idiaeresis
keycode 249 = odiaeresis Odiaeresis
keycode 250 = udiaeresis Udiaeresis
keycode 251 = ssharp question backslash
keycode 252 = asciicircum degree
keycode 253 = 3 sterling
keycode 254 = Mode_switch

使用event对象的keyCode属性判断输入的键值
eg:if(event.keyCode==13)alert(“enter!”);
键值对应表
A  0X65  U   0X85
B  0X66  V   0X86
C  0X67  W   0X87
D  0X68  X   0X88
E  0X69  Y   0X89
F  0X70  Z   0X90
G  0X71  0   0X48
H  0X72  1   0X49
I  0X73  2   0X50
J  0X74  3   0X51
K  0X75  4   0X52
L  0X76  5   0X53
M  0X77  6   0X54
N  0X78  7   0X55
O  0X79  8   0X56
P  0X80  9   0X57
Q  0X81 ESC  0X1B
R  0X82 CTRL  0X11
S  0X83 SHIFT 0X10
T  0X84 ENTER 0XD
如果要使用组合键,则可以利用event.ctrlKey,event.shiftKey,event .altKey判断是否按下了ctrl键、shift键以及alt键
示例代码如下,可通过在内添加onkeyboard=maskingKeyboard()方法来进行测试:

function maskingKeyboard(){
if(event.keyCode==8){
event.keyCode=0;
event.returnValue=false;
alert("当前设置不允许使用退格键");
}
if(event.keyCode==13){
event.keyCode=0;
event.returnValue=false;
alert("当前设置不允许使用回车键");
}
if(event.keyCode==116){
event.keyCode=0;
event.returnValue=false;
alert("当前设置不允许使用F5键刷新");
}
if((event.altKey)&&((window.event.keyCode==37)||(window.event.keyCode==39))){
event.returnValue=false;
alert("当前设置不允许使用Alt+方向键←或方向键→");
}
if((event.ctrlKey)&&(event.keyCode==67)){
event.returnValue=false;
alert("当前设置不允许使用Ctrl+C快键键");
}
if((event.shiftKey)&&(event.keyCode==121)){
event.returnValue=false;
alert("当前设置不允许使用Shift+F10");
}
}

Magento事件和观察者模式

Magento中的事件(event)和观察者模式(observer pattern)相当的有意思,它使得开发者在应用流中对Magento的重要部分进行扩展。为了提供高灵活性以及促进不同模块之间的交互,Magento添加了事件/观察者模式,这一模式可以让模块之间产生松散耦合。
这一系统分为两部分,处理对象和事件信息的事件以及监听特定事件的观察者。
事件和观察者模式工作原理

事件处理

事件是通过Mage::dispatchEvent()函数来创建和处理的。core内部已在core的主要部分创建了一些事件,例如,模型抽象类Mage_Core_Model_Abstract在每次模型被保存时调用_beforeSave()和_afterSave()这两个被保护的方法(protected),每个方法将会应用两个事件:

protected function _beforeSave()
{
if (!$this->getId()) {
$this->isObjectNew(true);
}
Mage::dispatchEvent('model_save_before',
array('object'=>$this));
Mage::dispatchEvent($this->_eventPrefix.'_save_before',
$this->_getEventData());
return $this;
}

protected function _afterSave()
{
$this->cleanModelCache();
Mage::dispatchEvent('model_save_after',
array('object'=>$this));
Mage::dispatchEvent($this->_eventPrefix.'_save_after',
$this->_getEventData());
return $this;
}

每个方法应用一个常规事件mode_save_after,然后基于对象类型的动态版会被保存。这使得我们可以通过观察者来操作对象成为可能。Mage::dispatchEvent()中有两个参数,第一个是事件名,第二个是通过observer接收到的一个数组,这让我们可以轻易地对对象进行操作。
为方便大家了解事件系统的详细内容,让我们来看看Mage::dispatchEvent()方法:

public static function dispatchEvent($name, array $data = array())
{
$result = self::app()->dispatchEvent($name, $data);
return $result;
}

事实上这个函数是Mage_Core_Model_App中app core类内部dispatchEvent()的一个别名函数(/app/code/core/Mage/Core/Model/App.php):

public function dispatchEvent($eventName, $args)
{
foreach ($this->_events as $area=>$events) {
if (!isset($events[$eventName])) {
$eventConfig = $this->getConfig()->getEventConfig($area, $eventName);
if (!$eventConfig) {
$this->_events[$area][$eventName] = false;
continue;
}
$observers = array();
foreach ($eventConfig->observers->children() as $obsName=>$obsConfig) {
$observers[$obsName] = array(
'type' => (string)$obsConfig->type,
'model' => $obsConfig->class ? (string)$obsConfig->class : $obsConfig->getClassName(),
'method'=> (string)$obsConfig->method,
'args' => (array)$obsConfig->args,
);
}
$events[$eventName]['observers'] = $observers;
$this->_events[$area][$eventName]['observers'] = $observers;
}
if (false===$events[$eventName]) {
continue;
} else {
$event = new Varien_Event($args);
$event->setName($eventName);
$observer = new Varien_Event_Observer();
}

foreach ($events[$eventName]['observers'] as $obsName=>$obs) {
$observer->setData(array('event'=>$event));
Varien_Profiler::start('OBSERVER: '.$obsName);
switch ($obs['type']) {
case 'disabled':
break;
case 'object':
case 'model':
$method = $obs['method'];
$observer->addData($args);
$object = Mage::getModel($obs['model']);
$this->_callObserverMethod($object, $method, $observer);
break;
default:
$method = $obs['method'];
$observer->addData($args);
$object = Mage::getSingleton($obs['model']);
$this->_callObserverMethod($object, $method, $observer);
break;
}
Varien_Profiler::stop('OBSERVER: '.$obsName);
}
}
return $this;
}

dispatchEvent()方法实际上完成了事件/观察者模型的所有工作:

  1. 获取Magento配置对象
  2. 遍历观察者的子节点,检查所定义的观察者是否在监听当前事件
  3. 对于每个现有observer,dispatch事件会试图去实际化观察者对象
  4. 最后,Magento会尝试调用映射特定事件的相应观察者方法

观察者绑定

现在,分派事件是方程中的唯一部分,我们还需要告诉Magento用哪个observer来监听各事件。您可能已经猜到,观察者通过config.xml来进行指定。正如前面我们所看到的,dispatchEvent()方法在配置对象查看哪些观察者可用。下面让我们来看看config.xml文件:

<events>
<event_name>
<observers>
<observer_identifier>
<class>module_name/observer</class>
<method>function_name</method>
</observer_identifier>
</observers>
</event_name>
</events>

event节点可通过各配置部分来进行指定(如admin, global, frontend等等),我们也可以指定多个event_name子节点,event_name需要与dispatchEvent()中用到的事件名相匹配。在每个dispatchEvent()节点中,都有一个可包含多个observer的单个观察者节点,这些observer都有单独的标识符。
观察者节点有两个属性,如<class>,指向我们的观察者模型类,另外还有<method>,它指向observer类内部的一个方法。让我们一起来分析一个定义观察者类的例子:

class Namespace_Modulename_Model_Observer
{
public function methodName(Varien_Event_Observer $observer)
{
//some code
}
}

*有意思的是观察者模型不继承Magento中的任何类