iron-multi-selectable.html
3.23 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
<!--
@license
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="iron-selectable.html">
<script>
/** @polymerBehavior Polymer.IronMultiSelectableBehavior */
Polymer.IronMultiSelectableBehaviorImpl = {
properties: {
/**
* If true, multiple selections are allowed.
*/
multi: {
type: Boolean,
value: false,
observer: 'multiChanged'
},
/**
* Gets or sets the selected elements. This is used instead of `selected` when `multi`
* is true.
*/
selectedValues: {
type: Array,
notify: true
},
/**
* Returns an array of currently selected items.
*/
selectedItems: {
type: Array,
readOnly: true,
notify: true
},
},
observers: [
'_updateSelected(attrForSelected, selectedValues)'
],
/**
* Selects the given value. If the `multi` property is true, then the selected state of the
* `value` will be toggled; otherwise the `value` will be selected.
*
* @method select
* @param {string} value the value to select.
*/
select: function(value) {
if (this.multi) {
if (this.selectedValues) {
this._toggleSelected(value);
} else {
this.selectedValues = [value];
}
} else {
this.selected = value;
}
},
multiChanged: function(multi) {
this._selection.multi = multi;
},
get _shouldUpdateSelection() {
return this.selected != null ||
(this.selectedValues != null && this.selectedValues.length);
},
_updateSelected: function() {
if (this.multi) {
this._selectMulti(this.selectedValues);
} else {
this._selectSelected(this.selected);
}
},
_selectMulti: function(values) {
this._selection.clear();
if (values) {
for (var i = 0; i < values.length; i++) {
this._selection.setItemSelected(this._valueToItem(values[i]), true);
}
}
},
_selectionChange: function() {
var s = this._selection.get();
if (this.multi) {
this._setSelectedItems(s);
} else {
this._setSelectedItems([s]);
this._setSelectedItem(s);
}
},
_toggleSelected: function(value) {
var i = this.selectedValues.indexOf(value);
var unselected = i < 0;
if (unselected) {
this.push('selectedValues',value);
} else {
this.splice('selectedValues',i,1);
}
this._selection.setItemSelected(this._valueToItem(value), unselected);
}
};
/** @polymerBehavior */
Polymer.IronMultiSelectableBehavior = [
Polymer.IronSelectableBehavior,
Polymer.IronMultiSelectableBehaviorImpl
];
</script>