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Ext.namespace('Zarafa.plugins.files.ui');
/**
* @class Zarafa.plugins.files.ui.UploadComponent
* @extends Ext.Component
* @xtype filesplugin.uploadcomponent
*/
Zarafa.plugins.files.ui.UploadComponent = Ext.extend(Ext.Component, {
/**
* @cfg {Function} callback The callback function which must be called when the
* file has be selected from Browser's file selection dialog.
*/
callback: Ext.emptyFn,
/**
* @cfg {Object} scope The scope for the {@link #callback} function
*/
scope: undefined,
/**
* @cfg {Boolean} multiple The multiple true to allow upload multiple files
* else allow single file only. by default it is false.
*/
multiple: false,
/**
* @cfg {String} accept the accept define which type of files allow to
* show in Browser's file selection dialog. i.e image/* to allow all type of images.
*/
accept: undefined,
/**
* @constructor
* @param {Object} config Configuration structure
*/
constructor: function (config) {
config = config || {};
Ext.applyIf(config, {
xtype: 'filesplugin.uploadcomponent'
});
Zarafa.plugins.files.ui.UploadComponent.superclass.constructor.call(this, config);
},
/**
* Event handler for opening the Browser's file selection dialog.
* See {@link #onFileInputChange} for the handling of the selected files.
* @private
*/
openUploadDialog: function () {
var uploadEl = this.getUploadEl();
// Register the change event handler
// so we detect when the user selects a file.
uploadEl.on('change', this.onFileInputChange, this);
// Mimick clicking on the <input> field
// to open the File Selection dialog.
uploadEl.dom.click();
},
/**
* Obtain or instantiate the {@link Ext.Element attachment} <input> element used
* for opening the File selection dialog.
* @return {Ext.Element} The file input element
* @private
*/
getUploadEl: function () {
var uploadEl = Ext.DomHelper.append(Ext.getBody(), {
cls : 'x-hidden',
tag : 'input',
type: 'file'
});
if (Ext.isDefined(this.multiple) && this.multiple) {
uploadEl.multiple = this.multiple;
}
if (Ext.isDefined(this.accept)) {
uploadEl.accept = this.accept;
}
uploadEl = Ext.get(uploadEl);
return uploadEl;
},
/**
* Event handler which is fired when the {@link #attachEl} has been changed.
* @param {Ext.EventObject} event The event
* @private
*/
onFileInputChange: function (event) {
var browserEvent = event.browserEvent;
var uploadEl = Ext.get(browserEvent.target);
var transfer = browserEvent.dataTransfer;
var transferFile = transfer ? transfer.files : undefined;
var files = uploadEl.dom.files || transferFile;
this.callback.call(this.scope, files);
// remove attachment element.
uploadEl.remove();
}
});
Ext.reg('filesplugin.uploadcomponent', Zarafa.plugins.files.ui.UploadComponent);
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