http://dev.sencha.com/deploy/dev/examples/form/file-upload.html
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file-upload.zip是js代码
fileuploadfield.zip是组建库（EXT官网自带的）
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详细代码如下：
html
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>File Upload Field Example</title>
<!-- ** CSS ** -->
<!-- base library -->
<link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" />
<!-- overrides to base library -->
<!-- page specific -->
<link rel="stylesheet" type="text/css" href="../shared/examples.css" />
<link rel="stylesheet" type="text/css" href="../ux/fileuploadfield/css/fileuploadfield.css"/>
<style type=text/css>
.upload-icon {
background: url('../shared/icons/fam/image_add.png') no-repeat 0 0 !important;
}
#fi-button-msg {
border: 2px solid #ccc;
padding: 5px 10px;
background: #eee;
margin: 5px;
float: left;
}
</style>
<!-- ** Javascript ** -->
<!-- ExtJS library: base/adapter -->
<script type="text/javascript" src="../../adapter/ext/ext-base.js"></script>
<!-- ExtJS library: all widgets -->
<script type="text/javascript" src="../../ext-all.js"></script>
<!-- overrides to base library -->
<script type="text/javascript" src="../ux/fileuploadfield/FileUploadField.js"></script>
<!-- page specific -->
<script type="text/javascript" src="file-upload.js"></script>
</head>
<body>
<h1>File Upload Field</h1>
<p>This example utilizes a custom extension to implement a file upload field.
The js is not minified so it is readable. See <a href="file-upload.js">file-input.js</a> and
<a href="../ux/fileuploadfield/FileUploadField.js">FileUploadField.js</a>.</p>
<p>
<b>Basic FileUpload</b><br />
A typical file upload field with Ext style. Direct editing of the text field cannot be done in a
consistent, cross-browser way, so it is always read-only in this implementation.
<div id="fi-basic"></div>
<div id="fi-basic-btn"></div>
</p>
<p>
<b>Basic FileUpload (Button-only)</b><br />
You can also render the file input as a button without the text field, with access to the field's value via the
standard <tt>Ext.form.TextField</tt> interface or by handling the <tt>fileselected</tt> event (as in this example).
<div id="fi-button"></div>
<div id="fi-button-msg" style="display:none;"></div>
<div class="x-clear"></div>
</p>
<p>
<b>Form Example</b><br />
The FileUploadField can also be used in standard form layouts, with support for anchoring, validation (the
field is required in this example), empty text, etc. This example also demonstrates using the
<tt>buttonCfg</tt> option to provide a customized icon upload button.
<div id="fi-form"></div>
</p>
</body>
</html>
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ext组建库
/*!
* Ext JS Library 3.2.1
* Copyright(c) 2006-2010 Ext JS, Inc.
* licensing@extjs.com
* http://www.extjs.com/license
*/
Ext.ns('Ext.ux.form');
/**
* @class Ext.ux.form.FileUploadField
* @extends Ext.form.TextField
* Creates a file upload field.
* @xtype fileuploadfield
*/
Ext.ux.form.FileUploadField = Ext.extend(Ext.form.TextField, {
/**
* @cfg {String} buttonText The button text to display on the upload button (defaults to
* 'Browse...'). Note that if you supply a value for {@link #buttonCfg}, the buttonCfg.text
* value will be used instead if available.
*/
buttonText: 'Browse...',
/**
* @cfg {Boolean} buttonOnly True to display the file upload field as a button with no visible
* text field (defaults to false). If true, all inherited TextField members will still be available.
*/
buttonOnly: false,
/**
* @cfg {Number} buttonOffset The number of pixels of space reserved between the button and the text field
* (defaults to 3). Note that this only applies if {@link #buttonOnly} = false.
*/
buttonOffset: 3,
/**
* @cfg {Object} buttonCfg A standard {@link Ext.Button} config object.
*/
// private
readOnly: true,
/**
* @hide
* @method autoSize
*/
autoSize: Ext.emptyFn,
// private
initComponent: function(){
Ext.ux.form.FileUploadField.superclass.initComponent.call(this);
this.addEvents(
/**
* @event fileselected
* Fires when the underlying file input field's value has changed from the user
* selecting a new file from the system file selection dialog.
* @param {Ext.ux.form.FileUploadField} this
* @param {String} value The file value returned by the underlying file input field
*/
'fileselected'
);
},
// private
onRender : function(ct, position){
Ext.ux.form.FileUploadField.superclass.onRender.call(this, ct, position);
this.wrap = this.el.wrap({cls:'x-form-field-wrap x-form-file-wrap'});
this.el.addClass('x-form-file-text');
this.el.dom.removeAttribute('name');
this.createFileInput();
var btnCfg = Ext.applyIf(this.buttonCfg || {}, {
text: this.buttonText
});
this.button = new Ext.Button(Ext.apply(btnCfg, {
renderTo: this.wrap,
cls: 'x-form-file-btn' + (btnCfg.iconCls ? ' x-btn-icon' : '')
}));
if(this.buttonOnly){
this.el.hide();
this.wrap.setWidth(this.button.getEl().getWidth());
}
this.bindListeners();
this.resizeEl = this.positionEl = this.wrap;
},
bindListeners: function(){
this.fileInput.on({
scope: this,
mouseenter: function() {
this.button.addClass(['x-btn-over','x-btn-focus'])
},
mouseleave: function(){
this.button.removeClass(['x-btn-over','x-btn-focus','x-btn-click'])
},
mousedown: function(){
this.button.addClass('x-btn-click')
},
mouseup: function(){
this.button.removeClass(['x-btn-over','x-btn-focus','x-btn-click'])
},
change: function(){
var v = this.fileInput.dom.value;
this.setValue(v);
this.fireEvent('fileselected', this, v);
}
});
},
createFileInput : function() {
this.fileInput = this.wrap.createChild({
id: this.getFileInputId(),
name: this.name||this.getId(),
cls: 'x-form-file',
tag: 'input',
type: 'file',
size: 1
});
},
reset : function(){
this.fileInput.remove();
this.createFileInput();
this.bindListeners();
Ext.ux.form.FileUploadField.superclass.reset.call(this);
},
// private
getFileInputId: function(){
return this.id + '-file';
},
// private
onResize : function(w, h){
Ext.ux.form.FileUploadField.superclass.onResize.call(this, w, h);
this.wrap.setWidth(w);
if(!this.buttonOnly){
var w = this.wrap.getWidth() - this.button.getEl().getWidth() - this.buttonOffset;
this.el.setWidth(w);
}
},
// private
onDestroy: function(){
Ext.ux.form.FileUploadField.superclass.onDestroy.call(this);
Ext.destroy(this.fileInput, this.button, this.wrap);
},
onDisable: function(){
Ext.ux.form.FileUploadField.superclass.onDisable.call(this);
this.doDisable(true);
},
onEnable: function(){
Ext.ux.form.FileUploadField.superclass.onEnable.call(this);
this.doDisable(false);
},
// private
doDisable: function(disabled){
this.fileInput.dom.disabled = disabled;
this.button.setDisabled(disabled);
},
// private
preFocus : Ext.emptyFn,
// private
alignErrorIcon : function(){
this.errorIcon.alignTo(this.wrap, 'tl-tr', [2, 0]);
}
});
Ext.reg('fileuploadfield', Ext.ux.form.FileUploadField);
// backwards compat
Ext.form.FileUploadField = Ext.ux.form.FileUploadField;
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?js
/*!
* Ext JS Library 3.2.1
* Copyright(c) 2006-2010 Ext JS, Inc.
* licensing@extjs.com
* http://www.extjs.com/license
*/
Ext.onReady(function(){
Ext.QuickTips.init();
var msg = function(title, msg){
Ext.Msg.show({
title: title,
msg: msg,
minWidth: 200,
modal: true,
icon: Ext.Msg.INFO,
buttons: Ext.Msg.OK
});
};
var fibasic = new Ext.ux.form.FileUploadField({
renderTo: 'fi-basic',
width: 400
});
new Ext.Button({
text: 'Get File Path',
renderTo: 'fi-basic-btn',
handler: function(){
var v = fibasic.getValue();
msg('Selected File', v && v != '' ? v : 'None');
}
});
var fbutton = new Ext.ux.form.FileUploadField({
renderTo: 'fi-button',
buttonOnly: true,
listeners: {
'fileselected': function(fb, v){
var el = Ext.fly('fi-button-msg');
el.update('<b>Selected:</b> '+v);
if(!el.isVisible()){
el.slideIn('t', {
duration: .2,
easing: 'easeIn',
callback: function(){
el.highlight();
}
});
}else{
el.highlight();
}
}
}
});
var fp = new Ext.FormPanel({
renderTo: 'fi-form',
fileUpload: true,
width: 500,
frame: true,
title: 'File Upload Form',
autoHeight: true,
bodyStyle: 'padding: 10px 10px 0 10px;',
labelWidth: 50,
defaults: {
anchor: '95%',
allowBlank: false,
msgTarget: 'side'
},
items: [{
xtype: 'textfield',
fieldLabel: 'Name'
},{
xtype: 'fileuploadfield',
id: 'form-file',
emptyText: 'Select an image',
fieldLabel: 'Photo',
name: 'photo-path',
buttonText: '',
buttonCfg: {
iconCls: 'upload-icon'
}
}],
buttons: [{
text: 'Save',
handler: function(){
if(fp.getForm().isValid()){
fp.getForm().submit({
url: 'file-upload.php',
waitMsg: 'Uploading your photo...',
success: function(fp, o){
msg('Success', 'Processed file "'+o.result.file+'" on the server');
}
});
}
}
},{
text: 'Reset',
handler: function(){
fp.getForm().reset();
}
}]
});
});
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