角度:注意指令中的过滤值 [英] angular: watch for filtered value in directive
问题描述
我正在尝试实现一个基于给定值绘制图表的指令.我希望从模板中传递绘图的数据.我有一个可行的解决方案,在 ng-model
中传递数据,然后我可以添加一个 $scope.watch
语句.但这不适用于过滤后的数据,而且我不需要双向绑定.
I'm trying to implement a directive that draws a chart based on given values.
I want the pass the data for the plot from the template.
I have a working solution, passing the data in ng-model
, for which I can then add a $scope.watch
statement. But that doesn't work with filtered data, and I don't need two-way binding.
理想情况下,html 应如下所示:
Ideally, the html should look like:
<chart ???????="list | filter" />
我想指令应该是这样的:
The directive, I guess, should look like:
return{
restrict: 'C',
link: function(scope, elem, attrs){
var chart = null
scope.$watch(????, function(v){
if(!chart){
chart = $.plot(elem, v , options);
elem.show();
}else{
chart.setData(v);
chart.setupGrid();
chart.draw();
}
});
}
};
有没有角度的方法来实现这一点?
Is there an angular way to achieve this?
推荐答案
如何将过滤后的列表保存在控制器的不同变量中?类似:
What about saving the filtered list in a different variable in your controller? something like:
$scope.filteredList = $filter('yourFilter')($scope.list);
在 HTML 中:
<chart ????="filteredList" />
您只需确保在 list
更改时更新 filteredList
.
You only need to make sure you update filteredList
whenever list
changes.
这篇关于角度:注意指令中的过滤值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!