GoogleCharts与KnockoutJS自定义绑定只绘制第一个图表,而不是其余的
GoogleCharts with KnockoutJS custom binding only draws first chart but not the rest
我一直在寻找解决这个问题的方法,但找不到任何地方。所以我请求你们来这里。
我试图绑定GoogleBarChart与KnockoutJS模型视图。所有Binding事件都被调用得很好,但不知何故它只绘制了第一张图表。
绑定方式如下:
// View Model 1
function ViewModel1() {
var self = this;
self.ViewModel1_BarData = ko.computed(function () {
return new google.visualization.arrayToDataTable([
['EmailAddress', 'Received'],
['email1@mail.com', 12],
['email2@mail.com', 20],
['email3@mail.com', 15]
]);
});
// View Model 2
function ViewModel2() {
var self = this;
self.ViewModel2_BarData = ko.computed(function () {
return new google.visualization.arrayToDataTable([
['Server', 'Occupied Space'],
['server1', 10],
['server2', 20],
['server3', 40]
]);
});
// Knockout Custom Binding for googleBarChart
ko.bindingHandlers.googleBarChart = {
init: function (element, valueAccessor, allBindingsAccesor, viewModel, bindingContext) {
var chart = new google.charts.Bar(element);
ko.utils.domData.set(element, 'googleBarChart', chart);
},
update: function (element, valueAccessor, allBindings, viewModel, bindingContext) {
var value = ko.unwrap(valueAccessor());
var options = allBindings.get('chartOptions') || {};
options = ko.unwrap(options);
var chart = ko.utils.domData.get(element,'googleBarChart');
chart.draw(value, options);
}
};
<!-- First Chart -->
<div id="ViewModel1Bindng_div">
<div id="ViewModel1_bar_div" data-bind="googleBarChart: ViewModel1_BarData, chartOptions: {
width: 400, legend: { position: 'none' }, chart: { title: 'title-text', subtitle: 'subtitle-text' }}"></div>
</div>
<!-- Second Chart -->
<div id="ViewModel2Binding_div">
<div id="ViewModel2_bar_div" data-bind="googleBarChart: ViewModel2_BarData, chartOptions: {
width: 400,legend: { position: 'none' }, chart: { title: 'title-text', subtitle: 'subtitle-text' }}">
</div>
</div>
任何帮助都会很感激。提前感谢。问候,Rohail
您在这里拼错了元素id:
ko.applyBindings(ViewModel2_model , document.getElementById("ViewModel2Bindng_div"))
应该是:
ko.applyBindings(ViewModel2_model , document.getElementById("ViewModel2Binding_div"))
我已经更新了你的代码片段。
// View Model 1
function ViewModel1() {
var self = this;
self.ViewModel1_BarData = ko.computed(function() {
return new google.visualization.arrayToDataTable([
['EmailAddress', 'Received'],
['email1@mail.com', 12],
['email2@mail.com', 20],
['email3@mail.com', 15]
]);
});
}
// View Model 2
function ViewModel2() {
var self = this;
self.ViewModel2_BarData = ko.computed(function() {
return new google.visualization.arrayToDataTable([
['Server', 'Occupied Space'],
['server1', 10],
['server2', 20],
['server3', 40]
]);
});
}
// Knockout Custom Binding for googleBarChart
ko.bindingHandlers.googleBarChart = {
init: function(element, valueAccessor, allBindingsAccesor, viewModel, bindingContext) {
var chart = new google.visualization.BarChart(element);
ko.utils.domData.set(element, 'googleBarChart', chart);
},
update: function(element, valueAccessor, allBindings, viewModel, bindingContext) {
var value = ko.unwrap(valueAccessor());
var options = allBindings.get('chartOptions') || {};
options = ko.unwrap(options);
var chart = ko.utils.domData.get(element, 'googleBarChart');
chart.draw(value, options);
}
};
var ViewModel1_model = new ViewModel1();
ko.applyBindings(ViewModel1_model, document.getElementById("ViewModel1Bindng_div"));
var ViewModel2_model = new ViewModel2();
ko.applyBindings(ViewModel2_model, document.getElementById("ViewModel2Binding_div"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.3.0/knockout-min.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi?autoload={'modules':[{'name':'visualization','version':'1','packages':['corechart'],'language':'en'}]}">
</script>
<!-- First Chart -->
<div id="ViewModel1Bindng_div">
<div id="ViewModel1_bar_div" data-bind="googleBarChart: ViewModel1_BarData, chartOptions: {
width: 400, legend: { position: 'none' }, chart: { title: 'title-text', subtitle: 'subtitle-text' }}"></div>
</div>
<!-- Second Chart -->
<div id="ViewModel2Binding_div">
<div id="ViewModel2_bar_div" data-bind="googleBarChart: ViewModel2_BarData, chartOptions: {
width: 400,legend: { position: 'none' }, chart: { title: 'title-text', subtitle: 'subtitle-text' }}">
</div>
</div>
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