oxjs/source/Ox.UI/js/Form/FileButton.js

140 lines
4.1 KiB
JavaScript

'use strict';
/*@
Ox.FileButton <f> File Button
options <o> Options
disabled <b|false> If true, the button is disabled
image <s|'file'> Symbol name (if type is 'image')
The default value will be 'files' if maxFiles is not 1
maxFiles <n|-1> Maximum number of files (or -1 for unlimited)
maxSize <n|-1> Maximum total file size in bytes (or -1 for unlimited)
title <s|''> Title of the button (and its tooltip)
type <s|'text'> Type of the button ('text' or 'image')
width <n|256> Width of the button in px
self <o> Shared private variable
([options[, self]]) -> <o:Ox.Element> File Button
click <!> click
@*/
Ox.FileButton = function(options, self) {
self = self || {};
var that = Ox.Element({}, self)
.defaults({
disabled: false,
image: options && options.maxFiles == 1 ? 'file' : 'files',
maxFiles: -1,
maxSize: -1,
style: 'default',
title: '',
type: 'text',
width: options.type == 'image' ? 16 : 256
})
.options(options || {})
.update({
disabled: function() {
self.$button.options({disabled: self.options.disabled});
self.$input[self.options.disabled ? 'hide' : 'show']();
},
title: function() {
self.$button.options({title: self.options.title});
}
})
.addClass('OxFileButton')
.css({width: self.options.width + 'px'});
self.files = [];
self.multiple = self.options.maxFiles != 1;
self.$button = Ox.Button({
disabled: self.options.disabled,
style: self.options.style,
title: self.options.type == 'image'
? self.options.image
: self.options.title,
type: self.options.type,
width: self.options.type == 'image'
? 'auto'
: self.options.width
})
.css({
float: 'left'
})
.appendTo(that);
self.$input = renderInput();
self.options.disabled && self.$input.hide();
function selectFiles(e) {
var filelist = e.target.files,
files = [];
self.files = [];
Ox.loop(filelist.length, function(i) {
files.push(filelist.item(i));
});
files.sort(self.options.maxSize == -1 ? function(a, b) {
a = a.name.toLowerCase();
b = b.name.toLowerCase();
return a < b ? -1 : a > b ? 1 : 0;
} : function(a, b) {
// if there's a max size,
// try to add small files first
return a.size - b.size;
}).forEach(function(file) {
if ((
self.options.maxFiles == -1
|| self.files.length < self.options.maxFiles
) && (
self.options.maxSize == -1
|| self.size + file.size < self.options.maxSize
)) {
self.files.push(file);
self.size += file.size;
}
});
self.$input = renderInput();
if (self.files.length) {
that.triggerEvent('click', {files: self.files});
}
}
function renderInput() {
self.$input && self.$input.remove();
return $('<input>')
.attr(
Ox.extend({
title: self.options.title,
type: 'file'
}, self.multiple ? {
multiple: true
} : {})
)
.css({
float: 'left',
width: self.options.width + 'px',
height: '16px',
marginLeft: -self.options.width + 'px',
opacity: 0
})
.on({
change: selectFiles
})
.appendTo(that);
}
/*@
blurButton <f> blurButton
@*/
that.blurButton = function() {
self.$input.blur();
}
/*@
focusButton <f> focusButton
@*/
that.focusButton = function() {
self.$input.focus();
};
return that;
}