typeahead 控件的向上/向下箭头键问题(角度引导 UI) [英] up/down arrow key issue with typeahead control (angular bootstrap UI)
问题描述
检查这个
在这里，我按照 回答.
以下是我需要进行的更改:
在 typeaheadMatch 指令中添加以下行(plunker 中 ui.bootstrap.typeahead.js 文件的第 335 行)
element[0].focus();添加了 shouldFocus 指令(第 - 314 -350 行)
.directive('shouldFocus', function(){返回 {限制:'A'，链接:功能(范围，元素，属性){范围.$watch(attrs.shouldFocus,function(newVal,oldVal){element[0].scrollIntoView(false);});}};})最后在 li (line - 372) 中添加指令
should-focus="isActive($index)"Check this PLNKR , i have implemented typeahead control, By default in type ahead control they are not setting any max-height or height to list, but as per requirement i have to fix height of list to 110px. So, when we have longer list at a time only 4 data will be shown and rest can be seen by scrolling down. Scrolling is working while user click on scroll up/down arrows, but it's not working with keyboard up/down keys.
The problem is explained in steps:-
- Type something i.e "a" to get data in typeahead (list will be populated)
- Press down-arrow key (focus will be on list item)
- Press down-arrow key 4-5 time to go further down (When we traverse down to list, scroll is not getting moved.)
- It always show top 4 items in list. Ideal behavior is it should shift.
User is able to scroll by clicking on scroll manually but with arrow key it's not scrolling.
HTML
<!doctype html>
<html ng-app="ui.bootstrap.demo">
<head>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.16/angular.js"></script>
<script src="//angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.12.0.js"></script>
<script src="example.js"></script>
<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
<link href="style.css" rel="stylesheet">
</head>
<body>
<div class='container-fluid' ng-controller="TypeaheadCtrl">
<h4>Static arrays</h4>
<pre>Model: {{selected | json}}</pre>
<input type="text" ng-model="selected" typeahead="state for state in states | filter:$viewValue | limitTo:8" class="form-control">
</div>
</body>
</html>
CSS
.dropdown-menu{
height:110px;
overflow:auto;
}
javascript datalist
$scope.states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire', 'New Jersey', 'New Mexico', 'New York', 'North Dakota', 'North Carolina', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island', 'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'];
In this I have override ui-bootstrap typeahead as suggested in the answer.
Following are the changes I need to make it work:
Added following line in typeaheadMatch directive (line - 335 of ui.bootstrap.typeahead.js file in the plunker)
element[0].focus();
Added shouldFocus directive (line - 314 -350)
.directive('shouldFocus', function(){
return {
restrict: 'A',
link: function(scope,element,attrs){
scope.$watch(attrs.shouldFocus,function(newVal,oldVal){
element[0].scrollIntoView(false);
});
}
};
})
and finally added directive in li (line - 372)
should-focus="isActive($index)"
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