dropdown（下拉框）

dropdown列表以及联动

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width">
    <link type="text/css" rel="stylesheet" href="../style/avalon.doc.css"/>
    <script src="../avalon.js"></script>
    <script type="text/javascript">
        require(['dropdown/avalon.dropdown.js'], function () {
            var dropdowns = [],
                    subDropdowns = []

            avalon.ready(function () {
                var dropdownVm = avalon.define('dropdown', function (vm) {
                    vm.provinces = [{
                        value: '江苏',
                        label: '江苏'
                    }, {
                        value: '河北',
                        label: '河北'
                    }]
                    vm.cities = {
                        江苏: [{
                            value: '南京',
                            label: '南京'
                        }, {
                            value: '杨州',
                            label: '杨州'
                        }],
                        河北: [{
                            value: '保定',
                            label: '保定'
                        }, {
                            value: '石家庄',
                            label: '石家庄'
                        }]
                    }
                    vm.rows = [{
                        note: "from",
                        province: "江苏",
                        city: "南京"
                    }, {
                        note: "to",
                        province: "河北",
                        city: "石家庄"
                    }]
                    vm.$opt = {
                        onInit: function (el) {
                            dropdowns.push(el.$id)
                        },
                        onChange: function (val, old, vm) {
                            var position = dropdowns.indexOf(vm.$id),
                                    dropdown = avalon.vmodels[dropdowns[position]],
                                    subDropdown = avalon.vmodels[subDropdowns[position]]

                            subDropdown.source = []
                            subDropdown.source = avalon.mix(true, [], dropdownVm.$model.cities[dropdown.value])
                        }
                    }
                    vm.$subOpt = {
                        onInit: function (el) {
                            subDropdowns.push(el.$id)
                        }
                    }
                });

                avalon.scan();
            });
        });
    </script>
    <script src="../highlight/shCore.js"></script>
</head>
<body>
<div class="wrapper" ms-controller="dropdown">
    <h2>dropdown（下拉框）</h2>

    <p>联动的dropdown</p>
    <ul>
        <li ms-repeat-row="rows">
            <span style="display:inline-block;width: 30px;margin: 10px;">{{row.note}}:</span>
            <select ms-duplex="row.province" ms-widget="dropdown, $, $opt">
                <option ms-repeat-option="provinces" ms-attr-value="option.value" ms-attr-label="option.label"></option>
            </select>
            <select ms-duplex="row.city" ms-widget="dropdown, $, $subOpt">
                <option ms-repeat-option="cities[row.province]" ms-attr-value="option.value"
                        ms-attr-label="option.label"></option>
            </select>
            {{row.province}}-{{row.city}}
        </li>
    </ul>
    <pre class="brush:html;gutter:false;toolbar:false;" ms-skip>
        
    </pre>
</div>
</body>
</html>