AngularJS下拉滚动条和宽度

时间:2014-10-18 18:07:17

标签: angularjs

我有angularjs app。我添加了下拉列表,但如果选项名称太长,则下拉列表的宽度会增加,随着项目数量的增加,其高度也会不断增加。我创建了jsfiddle来展示我到目前为止能够实现的目标。 http://jsfiddle.net/ibha/jd9jk755/4/

<div ng-controller="MyCtrl">    
    <select class="scrollwidth">
    <option ng-class="scrollwidth" ng-repeat="p in optionList" value="{{p.name}}">
      {{p.name}}
    </option>
</select>
</div>

function MyCtrl($scope) {
    $scope.optionList = [{name : 'vlist3'},{name : 'vlist1'},{name : 'vlist2'},{name : 'vlistLongNameeeeeeeeeeeeeeeeeeeeeeeeeee'}];                        

}

请告诉我如何使下拉列表的宽度和高度保持不变并添加滚动条。

2 个答案:

答案 0 :(得分:0)

不幸的是,浏览器正在做什么,你无法改变它,我所知道的唯一解决方案是自己截断实际文本。

您可以为此创建一个过滤器(这是一个示例):

angular.module('myApp', [])
    .filter('truncate', function () {
    return function (input, characters) {
        if (input.length > characters) {
            return input.substr(0, characters) + '...';
        }

        return input;
    };
}).controller('MyCtrl', function MyCtrl($scope) {
    $scope.optionList = [{
        name: 'vlist3'
    }, {
        name: 'vlist1'
    }, {
        name: 'vlist2'
    }, {
        name: 'vlistLongNameeeeeeeeeeeeeeeeeeeeeeeeeee'
    }];
});

工作示例:

http://jsfiddle.net/o3a3jcb9/

答案 1 :(得分:0)

我很快将其与ngRepeat:http://jsfiddle.net/jshado1/nfkgp5nL/

一起扔了

HTML

<select
    class="truncated-select">
    <option
        ng-repeat="option in options"
        value="{{option.value}}"
        truncate-option="option.label">{{option.label}}</option>
</select>

angular.module('MyApp', [])
.controller('MyController', [
    '$scope',
    function MyController( $scope ) {
        $scope.options = [
            {
                "label": "1label",
                "value": "option1value"
            },
            {
                "label": "option2label",
                "value": "option2value"
            },
            {
                "label": "option3label",
                "value": "option3value"
            }
        ];
        $scope.myModel = $scope.options[0];
    }
])
.directive('truncateOption', function truncateOption() {
    return {
        restrict: 'A',
        scope: {
            label: '=truncateOption'
        },
        link: function postLink(scope, element) {
            var selectElm = element.parent(),
                maxWidth  = selectElm.css('max-width').replace('px',''),
                fontSize  = selectElm.css('font-size').replace('px',''),
                maxLength = Math.floor(maxWidth / fontSize);
            if ( scope.label.length > maxLength )
                scope.label = scope.label.slice( 0 , maxLength-1 ) + '…';
        }
    };
});

通过上述内容,它会在选项标签中的select:max-width = 10个字符上尊重max-width: 10em的值。