[英]Angular: updating view with value passed from directive to controller
萌芽的Web開發人員在這里努力從我的控制器更新視圖。
我正在使用highmaps和angular為我的網絡應用程序構建一個整潔的選擇工具。 我有一個嵌套在控制器范圍內的指令。 我希望這個指令更新存儲在控制器中的值( selectedCountry
)。 然后,我希望控制器在視圖上顯示最新的selectedCountry
值。
我已檢查該指令是否將正確的selectedCountry
值傳遞給父控制器。 但是,控制器不會更新視圖以匹配更新的值。 如果有人能看一眼,我將不勝感激。
演示: http : //jsfiddle.net/frauLLmr/5/
index.html
<div ng-app="myApp">
<div ng-controller="GraphController as graphCtrl">
<div> {{graphCtrl.showSelectedCountry()}} </div>
<div> {{graphCtrl.selectedCountry}} </div>
<high-chart-directive update-selected-country='graphCtrl.updateSelectedCountry(newCountry)'></high-chart-directive>
</div>
</div>
app.js
var myApp = angular.module('myApp', []);
myApp.controller('GraphController', function() {
var self = this;
self.selectedCountry = 'unselected';
var outsideScopeTest = function() {
alert('selectedCountry (from controller scope): '
+ self.selectedCountry);
};
self.updateSelectedCountry = function(newCountry) {
self.selectedCountry = newCountry;
outsideScopeTest();
};
self.showSelectedCountry = function() {
return self.selectedCountry;
};
});
myApp.directive('highChartDirective', function () {
return {
restrict: 'E',
scope: {
updateSelectedCountry: '&'
},
link: function(scope, element) {
Highcharts.mapChart(element[0], getMapOptions(mapClick));
function mapClick(event) {
scope.updateSelectedCountry({newCountry: event.point.name});
alert('selectedCountry (from directive scope): '
+ event.point.name);
}
}
};
function getMapOptions(callback) {
return {
title: {
text: ''
},
mapNavigation: {
enabled: true,
buttonOptions: {
verticalAlign: 'bottom'
}
},
series: [{
data: getTestCountries(),
mapData: Highcharts.maps['custom/world-highres'],
// TODO-chantelle: figure out how geoJSON joinBy works
joinBy: 'hc-key',
name: 'Emission per capita',
states: {
hover: {
color: '#9370DB'
}
},
dataLabels: {
enabled: false,
format: '{point.name}'
}
}],
plotOptions: {
series: {
events: {
click: function(event) {
callback(event);
}
}
}
}
};
}
function getTestCountries() {
return [{
"hc-key": "ca",
"value": 0
}, {
"hc-key": "br",
"value": 1
}, {
"hc-key": "ru",
"value": 2
}];
}
});
問題是Highcharts.mapChart(element [0],getMapOptions(mapClick)); 不是角度范圍的一部分。 因此,此處的任何調用都不會觸發角度應用程序刷新。 您需要使用$ scope.apply()強制更新角度;
var outsideScopeTest = function() {
alert('selectedCountry (from controller scope): '
+ selfc.selectedCountry);
// force angular update
$scope.$apply();
};
嘗試這個
<div ng-app="myApp">
<div ng-controller="GraphController as graphCtrl">
<div> {{graphCtrl.showSelectedCountry()}} </div>
<div> {{graphCtrl.selectedCountry}} </div>
<high-chart-directive update-selected-country='graphCtrl.updateSelectedCountry(newCountry)'></high-chart-directive>
</div>
</div>
js
var myApp = angular.module('myApp', []);
myApp.controller('GraphController', function($scope) {
var self = this;
self.selectedCountry = 'unselected';
var outsideScopeTest = function() {
alert('selectedCountry (from controller scope): '
+ self.selectedCountry);
$scope.$apply();
};
self.updateSelectedCountry = function(newCountry) {
self.selectedCountry = newCountry;
outsideScopeTest();
};
self.showSelectedCountry = function() {
return self.selectedCountry;
};
});
myApp.directive('highChartDirective', function () {
return {
restrict: 'E',
scope: {
updateSelectedCountry: '&'
},
link: function(scope, element) {
Highcharts.mapChart(element[0], getMapOptions(mapClick));
function mapClick(event) {
scope.updateSelectedCountry({newCountry: event.point.name});
alert('selectedCountry (from directive scope): '
+ event.point.name);
}
}
};
function getMapOptions(callback) {
return {
title: {
text: ''
},
mapNavigation: {
enabled: true,
buttonOptions: {
verticalAlign: 'bottom'
}
},
series: [{
data: getTestCountries(),
mapData: Highcharts.maps['custom/world-highres'],
// TODO-chantelle: figure out how geoJSON joinBy works
joinBy: 'hc-key',
name: 'Emission per capita',
states: {
hover: {
color: '#9370DB'
}
},
dataLabels: {
enabled: false,
format: '{point.name}'
}
}],
plotOptions: {
series: {
events: {
click: function(event) {
callback(event);
}
}
}
}
};
}
function getTestCountries() {
return [{
"hc-key": "ca",
"value": 0
}, {
"hc-key": "br",
"value": 1
}, {
"hc-key": "ru",
"value": 2
}];
}
});
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.