www.gusucode.com > 一个基于extjs的强大聊天插件源码程序 > 一个基于extjs的强大聊天插件/extjame/ext-jame/js/ext2/source/widgets/form/TriggerField.js
/*
* Ext JS Library 2.0.2
* Copyright(c) 2006-2008, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
/**
* @class Ext.form.TriggerField
* @extends Ext.form.TextField
* Provides a convenient wrapper for TextFields that adds a clickable trigger button (looks like a combobox by default).
* The trigger has no default action, so you must assign a function to implement the trigger click handler by
* overriding {@link #onTriggerClick}. You can create a TriggerField directly, as it renders exactly like a combobox
* for which you can provide a custom implementation. For example:
* <pre><code>
var trigger = new Ext.form.TriggerField();
trigger.onTriggerClick = myTriggerFn;
trigger.applyToMarkup('my-field');
</code></pre>
*
* However, in general you will most likely want to use TriggerField as the base class for a reusable component.
* {@link Ext.form.DateField} and {@link Ext.form.ComboBox} are perfect examples of this.
* @cfg {String} triggerClass An additional CSS class used to style the trigger button. The trigger will always get the
* class 'x-form-trigger' by default and triggerClass will be <b>appended</b> if specified.
* @constructor
* Create a new TriggerField.
* @param {Object} config Configuration options (valid {@Ext.form.TextField} config options will also be applied
* to the base TextField)
*/
Ext.form.TriggerField = Ext.extend(Ext.form.TextField, {
/**
* @cfg {String} triggerClass A CSS class to apply to the trigger
*/
/**
* @cfg {String/Object} autoCreate A DomHelper element spec, or true for a default element spec (defaults to
* {tag: "input", type: "text", size: "16", autocomplete: "off"})
*/
defaultAutoCreate : {tag: "input", type: "text", size: "16", autocomplete: "off"},
/**
* @cfg {Boolean} hideTrigger True to hide the trigger element and display only the base text field (defaults to false)
*/
hideTrigger:false,
/**
* @hide
* @method autoSize
*/
autoSize: Ext.emptyFn,
// private
monitorTab : true,
// private
deferHeight : true,
// private
mimicing : false,
// private
onResize : function(w, h){
Ext.form.TriggerField.superclass.onResize.call(this, w, h);
if(typeof w == 'number'){
this.el.setWidth(this.adjustWidth('input', w - this.trigger.getWidth()));
}
this.wrap.setWidth(this.el.getWidth()+this.trigger.getWidth());
},
// private
adjustSize : Ext.BoxComponent.prototype.adjustSize,
// private
getResizeEl : function(){
return this.wrap;
},
// private
getPositionEl : function(){
return this.wrap;
},
// private
alignErrorIcon : function(){
this.errorIcon.alignTo(this.wrap, 'tl-tr', [2, 0]);
},
// private
onRender : function(ct, position){
Ext.form.TriggerField.superclass.onRender.call(this, ct, position);
this.wrap = this.el.wrap({cls: "x-form-field-wrap"});
this.trigger = this.wrap.createChild(this.triggerConfig ||
{tag: "img", src: Ext.BLANK_IMAGE_URL, cls: "x-form-trigger " + this.triggerClass});
if(this.hideTrigger){
this.trigger.setDisplayed(false);
}
this.initTrigger();
if(!this.width){
this.wrap.setWidth(this.el.getWidth()+this.trigger.getWidth());
}
},
// private
initTrigger : function(){
this.trigger.on("click", this.onTriggerClick, this, {preventDefault:true});
this.trigger.addClassOnOver('x-form-trigger-over');
this.trigger.addClassOnClick('x-form-trigger-click');
},
// private
onDestroy : function(){
if(this.trigger){
this.trigger.removeAllListeners();
this.trigger.remove();
}
if(this.wrap){
this.wrap.remove();
}
Ext.form.TriggerField.superclass.onDestroy.call(this);
},
// private
onFocus : function(){
Ext.form.TriggerField.superclass.onFocus.call(this);
if(!this.mimicing){
this.wrap.addClass('x-trigger-wrap-focus');
this.mimicing = true;
Ext.get(Ext.isIE ? document.body : document).on("mousedown", this.mimicBlur, this, {delay: 10});
if(this.monitorTab){
this.el.on("keydown", this.checkTab, this);
}
}
},
// private
checkTab : function(e){
if(e.getKey() == e.TAB){
this.triggerBlur();
}
},
// private
onBlur : function(){
// do nothing
},
// private
mimicBlur : function(e){
if(!this.wrap.contains(e.target) && this.validateBlur(e)){
this.triggerBlur();
}
},
// private
triggerBlur : function(){
this.mimicing = false;
Ext.get(Ext.isIE ? document.body : document).un("mousedown", this.mimicBlur);
if(this.monitorTab){
this.el.un("keydown", this.checkTab, this);
}
this.beforeBlur();
this.wrap.removeClass('x-trigger-wrap-focus');
Ext.form.TriggerField.superclass.onBlur.call(this);
},
beforeBlur : Ext.emptyFn,
// private
// This should be overriden by any subclass that needs to check whether or not the field can be blurred.
validateBlur : function(e){
return true;
},
// private
onDisable : function(){
Ext.form.TriggerField.superclass.onDisable.call(this);
if(this.wrap){
this.wrap.addClass('x-item-disabled');
}
},
// private
onEnable : function(){
Ext.form.TriggerField.superclass.onEnable.call(this);
if(this.wrap){
this.wrap.removeClass('x-item-disabled');
}
},
// private
onShow : function(){
if(this.wrap){
this.wrap.dom.style.display = '';
this.wrap.dom.style.visibility = 'visible';
}
},
// private
onHide : function(){
this.wrap.dom.style.display = 'none';
},
/**
* The function that should handle the trigger's click event. This method does nothing by default until overridden
* by an implementing function.
* @method
* @param {EventObject} e
*/
onTriggerClick : Ext.emptyFn
/**
* @cfg {Boolean} grow @hide
*/
/**
* @cfg {Number} growMin @hide
*/
/**
* @cfg {Number} growMax @hide
*/
});
// TwinTriggerField is not a public class to be used directly. It is meant as an abstract base class
// to be extended by an implementing class. For an example of implementing this class, see the custom
// SearchField implementation here: http://extjs.com/deploy/ext/examples/form/custom.html
Ext.form.TwinTriggerField = Ext.extend(Ext.form.TriggerField, {
initComponent : function(){
Ext.form.TwinTriggerField.superclass.initComponent.call(this);
this.triggerConfig = {
tag:'span', cls:'x-form-twin-triggers', cn:[
{tag: "img", src: Ext.BLANK_IMAGE_URL, cls: "x-form-trigger " + this.trigger1Class},
{tag: "img", src: Ext.BLANK_IMAGE_URL, cls: "x-form-trigger " + this.trigger2Class}
]};
},
getTrigger : function(index){
return this.triggers[index];
},
initTrigger : function(){
var ts = this.trigger.select('.x-form-trigger', true);
this.wrap.setStyle('overflow', 'hidden');
var triggerField = this;
ts.each(function(t, all, index){
t.hide = function(){
var w = triggerField.wrap.getWidth();
this.dom.style.display = 'none';
triggerField.el.setWidth(w-triggerField.trigger.getWidth());
};
t.show = function(){
var w = triggerField.wrap.getWidth();
this.dom.style.display = '';
triggerField.el.setWidth(w-triggerField.trigger.getWidth());
};
var triggerIndex = 'Trigger'+(index+1);
if(this['hide'+triggerIndex]){
t.dom.style.display = 'none';
}
t.on("click", this['on'+triggerIndex+'Click'], this, {preventDefault:true});
t.addClassOnOver('x-form-trigger-over');
t.addClassOnClick('x-form-trigger-click');
}, this);
this.triggers = ts.elements;
},
onTrigger1Click : Ext.emptyFn,
onTrigger2Click : Ext.emptyFn
});
Ext.reg('trigger', Ext.form.TriggerField);