I try out to create a Data visualization with Chart.js.
My question is quite simple...
I have multi with different id.
Checking an input "from" to an input "to"
you will able to get data in your chart,
If you check A to B you get some Data, if you check A to C some others... etc...
so I use multi condition to define the data must be shown in my Chart.
here my code,
<input id="DFN001" type="checkbox" name="DFN001" onclick="check()" value="from" >From DFN001</li>
and my JavaScript
<script>
var ctx1 = document.getElementById("chart_1").getContext("2d");
var data = datas1 ;
function validate(){
var DFN001 = document.getElementById('DFN001');
if (DFN001.checked){
datas1 = [10,15,20,85,30,35,40];
}else{
alert("You didn't check it! Let me check it for you.")
}
}
var lineChartData1 = {
labels : ["January","February","March","April","May","June","July"],
datasets : [
{
label: "My First dataset",
fillColor : "rgba(220,220,220,0.2)",
strokeColor : "rgba(220,220,220,1)",
pointColor : "rgba(220,220,220,1)",
pointStrokeColor : "#fff",
pointHighlightFill : "#fff",
pointHighlightStroke : "rgba(220,220,220,1)",
data : data
}
]
}
document.getElementById('generate_1').onclick = function()
{
window.myPie = new Chart(ctx1).Line(lineChartData1,{
responsive: true
});
};
</script>
but when I try it, I get this error... "Uncaught ReferenceError: datas1 is not defined" ...
Can Someone Help me ? or there is and other way do make it ?
thanks a LOT !
Best Regards, and Nice Day,
Mirko
You have a couple of program flow related stuff you have to take care of.
datas1 needs to be initialized before you attempt to set data using it. So you need to call validate(), not just declare it. In validate(), datas1 will be set only if the checkbox is checked. For now, let's simply check it using HTML (when you add the rest of your code, just remember not to attempt setting data unless datas1 is set i.e. the corresponding checkbox is checked)
<input id="DFN001" type="checkbox" name="DFN001" onclick="check()" value="from" checked>From DFN001
Calling validate is pretty simple
...
validate();
var ctx1 = document.getElementById...
You need to call new Chart to actually render the chart. Something like
new Chart(ctx1).Line(lineChartData1);
Finally you need to have the canvas element in your HTML (I assume you already have this - just included for completeness)
<canvas id="chart_1"></canvas>
In short, you'll need to call the Chart initialization, data initialization, etc. (on your checkbox clicks) keeping the above in mind.
Here's a fiddle with all the above changes - http://jsfiddle.net/cy2spqrg/
Related
I am trying to get Kendo Grid data which is hydrated from client side to a MVC controller method. My view contains several single fields like name, date of birth etc and tabular field which I hooked with a Kendo Grid. Since its a new operation I have no data in the grid ( and other fields) and user enters them from client side.
I have no idea how to proceed on this. Ideally I would like to get this data to a list in my viewmodal. So that when the user hits save, I have all other data and the grid data coming into a controller method.
I am able to successfully bind a list with kendo grid and display it. I have very little experience on JavaScript and Kendo and web programming.
If any of you can point me to the right direction, sample code would be greatly appreciated.
$("#departmet").kendoGrid({
dataSource: dataSource,
height: 250,
scrollable: true,
sortable: true,
filterable: true,
pageable: {
input: true,
numeric: false
},
columns: [
"DepartmentName",
"SubDivision"
]
});
From experience I know their documentation is not easy to navigate. It seems there is the documentation and then the API. The API is usually what you will always want to find. What you will need is the information from here https://docs.telerik.com/kendo-ui/api/javascript/ui/grid. If I understand the question correctly. There are several ways you can achieve posting. You could make use of editor templates. Click the Open in Dojo to get an idea how it looks.
https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/configuration/editable.template
With this you do not have to worry about modifying the data via javascript. Assuming your grid is surrounded with a form element it will get posted when submitted. Note paging is not accounted for here. Also, this method by default can auto post after each edit. If you don't want this behavior then you will have to have advanced knowledge of the API.....Correction on that last statement. The API is different when dealing with the data all on the client side. Click the Open in Dojo to see it all on the client side. If you are not wanting to use editor templates and want to manage the data editing yourself then you need to use the grid methods provided.
Once you have your grid created. To access the data source of the grid you will need to get the dataSource.
$('#departmet').data('kendoGrid').dataSource;
https://docs.telerik.com/kendo-ui/api/javascript/data/datasource
If you need to use a different data source(or change it) you can use the setDataSource method below(grid function).
https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/methods/setdatasource
To add to the data source use the add function to add a new object.
$('#departmet').data('kendoGrid').dataSource.add({ id: 2, name: 'name'});
https://docs.telerik.com/kendo-ui/api/javascript/data/datasource/methods/add
It is important with kendo to ALWAYS use the methods provided to change the data source so that the proper events can fire to update the UI accordingly. This includes if you need to set a property on a specific data item. In that case you need to use the set method on the item itself.
After you are done modifying your data. Within javascript get the data and either create DOM elements within a form
//JQuery sudo code example
var data = $("#departmet").data("kendoGrid").dataSource.data();
var dataLen = data.length;
var myForm = $('#my-form'); //Already within DOM
for (var i = 0; i < dataLen; i++) {
var item = data[i];
var idEl = $('<input type="hidden" name="userData[' + i + '].id" />');
idEl.val(item.id);
var nameEl = $('<input type="hidden" name="userData[' + i + '].name" />');
nameEl.val(item.name);
myForm.append(idEl);
myForm.append(nameEl);
}
myForm.submit();
This assumes your controller function(??) on the backend is expecting an array of objects with the property name of userData.
Alternatively, you can post it via ajax. For example, the ajax jquery function. Passing your data as the data of the ajax call.
http://api.jquery.com/jquery.ajax/
Don't want to ramble. Let me know if you need more help.
SO won't let me comment yet so have to add another answer. You will not need to define the data source within the .NET code when dealing with client only data. Just use this.
.DataSource(dataSource => dataSource
.Ajax()
.ServerOperation(false)
)
If you will have data coming from the backend then you need to use the generic-less constructor and pass in the object else keep what you have.
Html.Kendo().Grid(Model.MyList)
However, if you are preprocessing some client data on the screen that you want to initialize then you will need to do this on ready. Don't worry about the schema part of the data source. It already knows this when you used the .NET MVC wrapper because you gave it the schema(type) via the generic or the parameter provided.
var initialDS= new kendo.data.DataSource({
data: [
{ ActionName: "Some Name", ActionType: "Some Type" }
]
});
$(document).ready(function () {
$('#docworkflow').data('kendoGrid').setDataSource(initialDS);
});
As I mentioned in the other answer. Use the data source functions for adding additional data to the data source. No need to setDataSource each time you want to add. Just
//Assuming you have 2 inputs on the screen the user is entering info into
var nameEntry = $('#action-name').val();
var typeEntry = $('#action-type').val();
$('#docworkflow').data('kendoGrid').dataSource.add({ ActionName: nameEntry , ActionType: typeEntry });
So after some efforts I come up with. But I don't know where to specify the
data in the html code. Is it possible this way?
#(Html.Kendo().Grid <DockData.Action> ()
.Name("docworkflow")
.Columns(columns =>
{
columns.Bound(e => e.ActionName);
columns.Bound(e => e.ActionType);
}).DataSource( **How do I load a script variable here***)
//This script variable should be fed to the above code.
This variable is populatedwhen the user adds data from the UI which works fine.
var dataSource = new kendo.data.DataSource({
data: result,
schema: {
model: {
fields: {
ActionName: { type: "string" },
ActionType: { type: "string" }
}
}
},
pageSize: 20
});
Hi I am just beginning with angular and I am struggling to find the answer to what I'm sure is quite a simple thing to do.
I am currently getting the values of some input boxes and pushing them into my scope. This is creating one long 'array' eg:
['data-1','data-2','data-3']
I would like to format my data in the following way instead
$scope.data = [
{
'header1': 'data1-1',
'header1': 'data1-2',
'header1': 'data1-3'
},
{
'header1': 'data2-1',
'header1': 'data2-2',
'header1': 'data2-3'
}
]
This is my function as it currently is.
$scope.createRow = function(){
angular.forEach(angular.element("input"), function(value, key){
$scope.td.push($(value).val());
});
}
Any help or pointers would be greatly appreciated as I am just getting my head round the angular way
Doing this isn't hard... but before I give you a gun to shoot yourself in the foot, just to say that I think it would be beneficial to explain WHY you want structure in that other format you are mentioning. You seem to have lots of data repetition and that's always a red flag.
Now for the code, you just need to create object before pushing it to the array like:
$scope.createRow = function(){
angular.forEach(angular.element("input"), function(value, key){
var obj = {
"header1": val + "-1",
"header2": val + "-2"
};
$scope.td.push(obj);
});
}
EDIT:
OK, so you are trying to add new row to the table. First of all, you shouldn't be doing angular.forEach, but rather those input elements in HTML should bind to existing scope object, like:
// obviously use better names than Input1Value
// I am here just giving you example
$scope.bindData = {
Input1Value: null,
Input2Value: null
};
// in HTML you will do
// <input ng-model="bindData.Input1Value" />
// <input ng-model="bindData.Input2Value" />
Now that you've eliminated that nasty angular.forEach you need to have some kind of event handler, for example when user clicks the button you want to add this object to the array to which table is data bound. Just be sure to clone the $scope.bindData object when you add it to array.
$scope.createRow = function(){
var newRowData = $scope.cloneObject($scope.bindData);
$scope.td.push(newRowData);
}
// http://heyjavascript.com/4-creative-ways-to-clone-objects/
// https://stackoverflow.com/questions/728360/most-elegant-way-to-clone-a-javascript-object
$scope.cloneObject = function(objToClone) {
var newObj = (JSON.parse(JSON.stringify(objToClone)));
}
To close this answer off - keep in mind, if you ever find yourself directly referencing HTML DOM elements in Javascript with AngularJS - you are doing something wrong. It's a nasty habit to eliminate, especially if you are coming from jQuery background (and how doesn't?), where everything is $("#OhHiThere_ElementWithThisId).
Obviously the main thread on this topic on StackOverflow is this one:
“Thinking in AngularJS” if I have a jQuery background?
However I find that it's too theoretical, so Google around and you may find better overviews like:
jQuery vs. AngularJS: A Comparison and Migration Walkthrough
The main problem is that I have a dropdown menu whose options should be updated dynamically.
The workflow is as follows:
I have an input element connected to an ng-model called toSubmit that when longer than 3 characters should fire an http.get call to fetch the list that should populate the dropdown menu.
So this list will change everytime the toSubmit variable changes. Let's call this list database (in the controller it is $scope.database.
What I am trying right now is a very simple solution that doesn't work most probably because the html DOM that contains the dropdown list is loaded at the very beginning and does not keep track of the changes in the options.
In my controller I have the following part which watches over toSubmit:
$scope.toSubmit = '';
$scope.$watch('toSubmit',function(query){
if (query.length >= 3){
getQueryDatabases.companyNameService({'field':'name','query':query,'numberOfHits':'10'},'CIK').prom.then(
function(dataObject){
$scope.database = dataObject;
// dataObject.forEach(function(item){
// $scope.databaseString.push(item.cik + ' ' + item.companyName);
});
});
}
});
And my html looks like the following:
<label for="nameCompany">Name:</label>
<input type="text" ng-model="toSubmit"></input>
<select ng-model="database" ng-options="line in database"></select>
Now my take was take by binding database with ng-Model I would get the result but I am most likely wrong. Can someone please help me?
I recommend you to use select2 that'll handle things like limiting input before server request and have great look and extendibility.
You need to add angular-ui-select2 to your project.
Here is code for you:
Html:
<input class='form-control' data-ng-model='position.company' data-ng-required data-placeholder='Company:' data-ui-select2='employerSelect2Options' id='company_name' type='hidden'>
JavaScript:
$scope.employerSelect2Options = {
minimumInputLength: 2,
query: function (query) {
var _query = query;
var companies = Restangular.all('companies').getList({query: query.term});
companies.then(function(data) {
var results = {results: []};
_.each(data, function(element, index, list) {
results.results.push({id: element.id, text: element.name});
})
if(!_.contains(_.map(data, function(element){ return element.name; }), _query.term)) {
results.results.push({id: _query.term , text: 'Create company "' + _query.term + '"'});
}
_query.callback(results);
})
}
};
My example also contains logic for add "create company" if zero results returned. In this case position.company will contain text of non found company name in id field and you can check it on server side and create one before assigning id.
This logic in
if(!_.contains
condition.
I wrote code below that is working perfectly for displaying the results of my sales tax calculation into a span tag. But, I am not understanding how to change the "total" value into a variable that I can work with.
<script type="text/javascript">
function doStateTax(){
var grandtotalX = $('#GRANDtotalprice').val();
var statetaxX = $('#ddl').val();
$.post('statetax.php',
{statetaxX:statetaxX, grandtotalX:grandtotalX},
function(data) {
data = $.parseJSON(data);
$('.products-placeholder').html(data.products);
$('.statetax-placeholder').html(data.statetax);
$('.total-placeholder').html(data.total);
// ...
});
return false;
};
</script>
Currently, $('.total-placeholder').html(data.total); is successfully placing the total number into here:
<span class="total-placeholder"></span>
but how would I make the (data.total) part become a variable? With help figuring this out, I can pass that variable into a hidden input field as a "value" and successfully give a proper total to Authorize.net
I tried this and id didn't work (see the testtotal part to see what I'm trying to accomplish)..
function(data) {
data = $.parseJSON(data);
$('.products-placeholder').html(data.products);
$('.statetax-placeholder').html(data.statetax);
$('.total-placeholder').html(data.total);
$testtotal = (data.total);
// ...
If you are using a hidden field inside a form, you could do:
//inside $.post -> success handler.
$('.total-placeholder').html(data.total);
$('input[name=yourHiddenFieldName]', yourForm).val(data.total);
This will now be submitted along with the usual submit. Or if you want to access the data elsewhere:
var dataValue = $('input[name=yourHiddenFieldName]', yourForm).val();
The "data" object you are calling can be used anywhere within the scope after you have a success call. Like this:
$.post('statetax.php',
{statetaxX:statetaxX, grandtotalX:grandtotalX},
function(data) {
data = $.parseJSON(data);
var total = data.total;
var tax = data.total * 0.19;
});
return false;
};
Whenever you get an object back always try to see with an alert() or console.log() what it is.
alert(data); // This would return <object> or <undefined> or <a_value> etc.
After that try to delve deeper (when not "undefined").
alert(data.total); // <a_value>?
If you want 'testotal' to be recognized outside the function scope, you need to define it outside the function, and then you can use it somewhere else:
var $testtotal;
function(data) {
data = $.parseJSON(data);
$('.products-placeholder').html(data.products);
$('.statetax-placeholder').html(data.statetax);
$('.total-placeholder').html(data.total);
$testtotal = (data.total);
EDIT:
The comments are becoming too long so i'll try and explain here:
variables defined in javascript cannot be accessed by PHP and vice versa, the only way PHP would know about your javascript variable is if you pass it that variable in an HTTP request (regular or ajax).
So if you want to pass the $testtotal variable to php you need to make an ajax request(or plain old HTTP request) and send the variable to the php script and then use $_GET/$_POST to retrieve it.
Hope that answers your question, if not then please edit your question so it'll be clearer.
I am trying to work out how to update a Highcharts pie chart but for the life of me cannot seem to get it working right.
I have looked over the documentation and have been able to get a bar and line and spline graph to update fine but when using this function for pie charts it just does not work.
I am currently feeding in:
item.setData([["none", 100]], true);
Where item equals the series like so:
$.each(browser_chart.series, function(i, item){
if(item.name == 'Browser share'){
console.log(data.browsers);
item.setData([["none", 100]], true);
}
});
Which as shown in the demos is how the data for a pie chart is formatted. Problem is it cannot seem to read the series correctly. I try:
item.setData([\"none\", 100], true);
And it seems to do something but cannot read the x and y values right (which of course means it's wrong).
Can anyone here point me in the direction to get this working?
Thanks,
Edited:
When you set a new data you have to set as array of arrays for all pie parts in this case.
In my Example I have six categories, so I've to set data for all of them.
So, in this case you have to do something like:
var seriesData = [];
$.each(browser_chart.series, function(i, item) {
if(item.name == 'Browser share'){
seriesData.push(["serie"+i, someNumber]);
}
});
chart.series[0].setData(seriesData, true);
I have marked Ricardos answer however my question involved a tad more that I didn't explain properly.
I was updating the pie chart through AJAX from JSON generated by a PHP Backend. When I applied new data to the pie chart it would break.
Using Ricardos answer I was able to find out it is because I have a different number of points so I cannot just update the pie chart I must remake it like so:
browser_chart_config.series[0].data = data.browsers;
browser_chart = new Highcharts.Chart(browser_chart_config);
This will allow you to update a chart when you have a different number of points.
Hope it helps,
EDIT: I also found out that this is a known issue with HighCharts: https://github.com/highslide-software/highcharts.com/issues/542
//initialise
var new_data;
new_data = [{ name: 'load percentage', y: 10.0, color: '#b2c831' },{ name: 'rest', y: 60.0, color: '#3d3d3d' }];
function requestData()
{
$.ajax({
url: 'live-server-data.php',
success: function(point)
{
var series = chart.series[0];
var y_val = parseInt(point[1]);
var x_val = 100 - y_val;
console.log(point[0]+ "," +point[1] );//["0"]
new_data = [{ name: 'load percentage', y:y_val, color: '#b2c831' },{ name: 'rest', y:x_val, color: '#3d3d3d' }];
series.setData(new_data);
// call it again after one second
},
cache: false
});
}