This question already has answers here:
How to access the correct `this` inside a callback
(13 answers)
Closed 6 years ago.
My problem is that I have a grid that has an option to create a new row. This action sends an ajax request to my backend that inserts new rows into my Database. When completed it returns the MAX index (the most recently added index) to my frontend. I want to use this index as the value in ASSERTION_ID. So I need to wait for ajax request to finish and then update the grid with the created index.
The problem is that when I'm using a when(). then(). or simply the success callback for passing the data to my newRow then the .this part of this.state.rows and this.setState points to the "wrong" this. So how can you make sure that a task is completed while still perserving the same this. reference?
handleAddRow: function(e) {
var newAssertionID;
$.when($.ajax({
url: root + port + "/insertannotation",
type: 'post',
success: function(data) {
newAssertionID = data.assertionID.rows[0][0]
}
})).then(function(data) {
var newRow = {
ASSERTION_ID: newAssertionID
};
var rows = React.addons.update(this.state.rows, { $push: [newRow] });
this.setState({ rows: rows });
});
},
render: function() {
return (
React.createElement(ReactDataGrid, {
contextMenu: React.createElement(MyContextMenu, {
onRowDelete: this.deleteRow
}),
enableCellSelect: true,
onGridSort: this.handleGridSort,
columns: columns,
rowGetter: this.rowGetter,
rowsCount: this.getSize(),
minHeight: 500,
onRowUpdated: this.handleRowUpdated,
toolbar: React.createElement(Toolbar, {
enableFilter: true,
onAddRow: this.handleAddRow
}),
onAddFilter: this.handleFilterChange
})
);
}
You have to have a reference saved.
handleAddRow: function(e) {
var that = this; // note this
var newAssertionID;
$.when($.ajax({
url: root + port + "/insertannotation",
type: 'post',
success: function(data) {
newAssertionID = data.assertionID.rows[0][0]
}
})).then(function(data) {
var newRow = {
ASSERTION_ID: newAssertionID
};
var rows = React.addons.update(that.state.rows, {
$push: [newRow]
});
that.setState({
rows: rows
});
});
},
Related
I am trying to create an object that I can modify as per
Datatables - Data
I use the following code to create my object
function projectData(projid,projdesc,descdet){
this._projid = 'HTML1'
this._projdesc = 'HTML2'
for(var i=0;i<=7;i++){
this['_day'+i] = 'HTML3';
}
this.projid = function(){
return this._projid
}
this.projdesc = function(){
return this._projdesc
}
this.day0 = function(){ // More of these for day (0-7)
return this._day0
}
}
Then I use the following table initialization. (prjData is an array of New projectData objects)
var table = $('#table-ProjectHours').DataTable({
data: prjData,
"columns": [
{ data: 'projid',"visible": true},
{ data: 'projdesc',"width": "45%" },
{ data: 'day0',"orderDataType": "dom-text-numeric" },
{ data: 'day1',"orderDataType": "dom-text-numeric" },
{ data: 'day2',"orderDataType": "dom-text-numeric" },
{ data: 'day3',"orderDataType": "dom-text-numeric" },
{ data: 'day4',"orderDataType": "dom-text-numeric" },
{ data: 'day5',"orderDataType": "dom-text-numeric" },
{ data: 'day6',"orderDataType": "dom-text-numeric" },
{ data: 'day7',"orderDataType": "dom-text-numeric" }
]
});
I access my table through
var dto = $('#table-ProjectHours').DataTable().data();
I get my objects as seen here:
What I do not understand is why when I attempt to do dto[0].day0 I do not get _day0 --- I just get the function string.
I can access the data through _day0 but it seems wrong...
Try rows().data() https://datatables.net/reference/api/rows().data()
e.g.
var table = $('#example').DataTable();
var data = table
.rows()
.data();
alert( 'The table has '+data.length+' records' );
In order to set data in jquery-datatables you must use .row(index).data(obj) or .cell(selector).data(obj).
You can also use row(index).day0() and if you write a set portion of your method you can set the data like row(index).day0(thing_to_set) You must call row(index).invalidate after changing the data for it to appear correctly.
In this particular situation, .day0 must be called as .day0() since it is a method.
I have a collection of data whereby the requirements are for the autocomplete to show results after 3 characters have been written. However, there is one piece of data that which is only two characters long.. ('LG').
So my question is;
Is there a way to keep :minLength:3 whilst creating an exception for when certain characters are typed, such as ('LG')?
I've been trying to hard code the result within the success parameter, as can be seen below but it's not working as intended. I'm hoping I'm on the right track though?
Here is a code snippet, and plunk of complete code thus far;
success: function (LG, resp) {
if (LG.length === 2) {
LG.push({
label: 'LG',
value: 'LG',
});
}
response(LG);
var results = [];
$.each(resp.Q0, function(k, v) {
if (v.indexOf(request.term.toUpperCase()) >= 0) {
results.push(v);
}
});
response(results);
}
});
},
https://plnkr.co/edit/wfAoi0sZDdDd0pCufQi9
I think an option is modify the minChars and modify the success function.
Here i add you the code, tell me if would suit your problem.
$(document).ready(function() {
setTimeout(function() {
$('#_Q0').autocomplete({
source: function(request, response) {
$.ajax({
url: "brands.json",
dataType: "JSON",
type: "GET",
success: function (resp) {
var results = [];
$.each(resp.Q0, function(k, v) {
if (request.term.length >= 3 && v.indexOf(request.term.toUpperCase()) >= 0) {
results.push(v);
}
if (request.term.length == 2 && request.term.toUpperCase() == v) {
results.push(v);
}
});
response(results);
}
});
},
autoFocus: true,
minLength: 2,
response: function(event, ui) {
if (!ui.content.length) {
var noResult = {
value: "",
label: "No results found"
};
ui.content.push(noResult);
}
}
});
var render = $('#_Q0').autocomplete('instance')._renderMenu;
$('#_Q0').autocomplete('instance')._renderMenu = function(ul, items) {
items.push({
label: 'AUTRE MARQUE',
value: 'AUTRE MARQUE',
last: true
});
render.call(this, ul, items);
};
}, 100);
});
The point i dont like too much is i had to hardcode the minChars into the success function, maybe we could find the way to recover the value from the property "minChars"
https://plnkr.co/edit/ygtMteIH1J5EI5KUMU3C?p=preview
I have a jquery context menu on my landing page where I have hardcode menu items. Now I want to get the menu items from server. Basically the idea is to show file names in a specified directory in the context menu list and open that file when user clicks it...
This is so far I have reached..
***UPDATE***
C# code
[HttpPost]
public JsonResult GetHelpFiles()
{
List<Manuals> manuals = null;
var filesPath = Server.MapPath(#"\HelpManuals");
var standardPath = new DirectoryInfo(filesPath);
if (standardPath.GetFiles().Any())
{
manuals = standardPath.GetFiles().Select(x => new Manuals
{
Name = GetFileNamewithoutExtension(x.Name),
Path = x.Name
}).ToList();
}
return Json(manuals, JsonRequestBehavior.AllowGet);
}
private string GetFileNamewithoutExtension(string filename)
{
var extension = Path.GetExtension(filename);
return filename.Substring(0, filename.Length - extension.Length);
}
JavaScript Code
$.post("/Home/GetHelpFiles", function (data) {
$.contextMenu({
selector: '#helpIcon',
trigger: 'hover',
delay: 300,
build: function($trigger, e) {
var options = {
callback: function(key) {
window.open("/HelpManuals/" + key);
},
items: {}
};
$.each(data, function (item, index) {
console.log("display name:" + index.Name);
console.log("File Path:" + index.Path);
options.items[item.Value] = {
name: index.Name,
key: index.Path
}
});
}
});
});
Thanks to Matt. Now, the build function gets fire on hover.. but im getting illegal invocation... and when iterating through json result, index.Name and this.Name gives correct result. But item.Name doesn't give anything..
to add items to the context menu dynamically you need to make a couple changes
$.contextMenu({
selector: '#helpIcon',
trigger: 'hover',
delay: 300,
build: function($trigger, e){
var options = {
callback: function (key) {
var manual;
if (key == "adminComp") {
manual = "AdminCompanion.pdf";
} else {
manual = "TeacherCompanion.pdf";
}
window.open("/HelpManuals/" + manual);
},
items: {}
}
//how to populate from model
#foreach(var temp in Model.FileList){
<text>
options.items[temp.Value] = {
name: temp.Name,
icon: 'open'
}
</text>
}
//should be able to do an ajax call here but I believe this will be called
//every time the context is triggered which may cause performance issues
$.ajax({
url: '#Url.Action("Action", "Controller")',
type: 'get',
cache: false,
async: true,
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (_result) {
if (_result.Success) {
$.each(_result, function(item, index){
options.items[item.Value] = {
name: item.Name,
icon: 'open'
}
});
}
});
return options;
}
});
so you use build and inside of that define options and put your callback in there. The items defined in there is empty and is populated in the build dynamically. We build our list off of what is passed through the model but I believe you can put the ajax call in the build like I have shown above. Hopefully this will get you on the right track at least.
I solved this problem the following way.
On a user-triggered right-click I return false in the build-function. This will prevent the context-menu from opening. Instead of opeing the context-menu I start an ajax-call to the server to get the contextMenu-entries.
When the ajax-call finishes successfully I create the items and save the items on the $trigger in a data-property.
After saving the menuItems in the data-property I open the context-menu manually.
When the build-function is executed again, I get the items from the data-property.
$.contextMenu({
build: function ($trigger, e)
{
// check if the menu-items have been saved in the previous call
if ($trigger.data("contextMenuItems") != null)
{
// get options from $trigger
var options = $trigger.data("contextMenuItems");
// clear $trigger.data("contextMenuItems"),
// so that menuitems are gotten next time user does a rightclick
// from the server again.
$trigger.data("contextMenuItems", null);
return options;
}
else
{
var options = {
callback: function (key)
{
alert(key);
},
items: {}
};
$.ajax({
url: "GetMenuItemsFromServer",
success: function (response, status, xhr)
{
// for each menu-item returned from the server
for (var i = 0; i < response.length; i++)
{
var ri = response[i];
// save the menu-item from the server in the options.items object
options.items[ri.id] = ri;
}
// save the options on the table-row;
$trigger.data("contextMenuItems", options);
// open the context-menu (reopen)
$trigger.contextMenu();
},
error: function (response, status, xhr)
{
if (xhr instanceof Error)
{
alert(xhr);
}
else
{
alert($($.parseHTML(response.responseText)).find("h2").text());
}
}
});
// This return false here is important
return false;
}
});
I have finally found a better solution after reading jquery context menu documentation, thoroughly..
C# CODE
public JsonResult GetHelpFiles()
{
List<Manuals> manuals = null;
var filesPath = Server.MapPath(#"\HelpManuals");
var standardPath = new DirectoryInfo(filesPath);
if (standardPath.GetFiles().Any())
{
manuals = standardPath.GetFiles().Select(x => new Manuals
{
Name = GetFileNamewithoutExtension(x.Name),
Path = x.Name
}).ToList();
}
return Json(manuals, JsonRequestBehavior.AllowGet);
}
HTML 5
<div id="dynamicMenu">
<menu id="html5menu" type="context" style="display: none"></menu>
</div>
JavaScript Code
$.post("/Home/GetHelpFiles", function (data) {
$.each(data, function (index, item) {
var e = '<command label="' + item.Name + '" id ="' + item.Path + '"></command>';
$("#html5menu").append(e);
});
$.contextMenu({
selector: '#helpIcon',
trigger: 'hover',
delay: 300,
items: $.contextMenu.fromMenu($('#html5menu'))
});
});
$("#dynamicMenu").on("click", "menu command", function () {
var link = $(this).attr('id');
window.open("/HelpManuals/" + link);
});
Here's my solution using deferred, important to know that this feature is supported for sub-menus only
$(function () {
$.contextMenu({
selector: '.SomeClass',
build: function ($trigger, e) {
var options = {
callback: function (key, options) {
// some call back
},
items: JSON.parse($trigger.attr('data-storage')) //this is initial static menu from HTML attribute you can use any static menu here
};
options.items['Reservations'] = {
name: $trigger.attr('data-reservations'),
icon: "checkmark",
items: loadItems($trigger) // this is AJAX loaded submenu
};
return options;
}
});
});
// Now this function loads submenu items in my case server responds with 'Reservations' object
var loadItems = function ($trigger) {
var dfd = jQuery.Deferred();
$.ajax({
type: "post",
url: "/ajax.php",
cache: false,
data: {
// request parameters are not importaint here use whatever you need to get data from your server
},
success: function (data) {
dfd.resolve(data.Reservations);
}
});
return dfd.promise();
};
There is a form on my page with textarea (CKEDITOR) and select field <select id="_photogalleries" multiple="multiple"></select>. I'd like options in RichCombo to depend on the options that are selected in select with id #_photogalleries. Is there any way to regenerate RichCombo dynamically?
Thanks in advance.
CKEDITOR.plugins.add('style_plugin', {
requires: ['richcombo'],
init: function(editor) {
var pluginName = 'style_plugin';
var config = editor.config,
lang = editor.lang.format;
editor.ui.addRichCombo('photogalleries', {
label: "Фоторепортаж",
title: "Фоторепортаж",
voiceLabel: "Фоторепортаж",
className: 'cke_format',
multiSelect: false,
icon: CKEDITOR.plugins.getPath('style_plugin') + 'photo-list-horizontal.png',
panel: {
css: [config.contentsCss, CKEDITOR.getUrl(editor.skinPath + 'editor.css')],
voiceLabel: lang.panelVoiceLabel
},
init: function () {
this.startGroup("Фоторепортаж");
var list=this;
$("#_photogalleries option:selected").each(function(index, value){
console.log(index, value);
list.add("#HORIZONTAL_GALLERY_"+ $(value).val()+"#", "(Г) " + $(value).text(), "(Г) " + $(value).text());
list.add("#VERTICAL_GALLERY_"+ $(value).val()+"#", "(В) " + $(value).text(), "(В) " + $(value).text());
});
},
onClick: function (value) {
editor.focus();
editor.fire('saveSnapshot');
editor.insertHtml(value);
editor.fire('saveSnapshot');
}
});
}
});
This works for me and you dont have to keep a global variable.
CKEDITOR.plugins.add('systemdata', {
init: function (editor) {
var fnData = editor.config.fnData;
if (!fnData || typeof (fnData) != 'function')
throw "You must provide a function to retrieve the list data.";
editor.ui.addRichCombo('systemDataCmb',
{
allowedContent: 'abbr[title]',
label: "System Data",
title: "System Data",
multiSelect: false,
init: function () {
var self = this;
var content = fnData();
$.each(content, function(index, value) {
// value, html, text
self.add(value.name, value.name, value.name)
});
}
}
Then to set the function to get the data put this somewhere where you setup the ckeditor
CKEDITOR.replaceAll(function(element, config) {
config.startupFocus = true;
config.fnData = function() {
var returnData = null;
$.ajax({
url: "/GetData",
async: false,
data: { id: 1 },
}).done(function(result) { returnData= result; });
return returnData;
};
});
It assumes you bring back a json response that has an array of items that have a value property, that can be easily changed though.
I guess I found a solution that worked for me. It was to keep a list object in a global variable and then modify it when onchange event fires in the external select.
I solved this trouble with a single line:
YOURCOMBO.createPanel(editor);
For example:
var comboTeam = editor.ui.get("team");
comboTeam.createPanel(editor);//This is important, if not, doesnt works
Now you can add items to the combo
comboTeam.add("name","name","name");
comboTeam.add("name2","name2","name2");
comboTeam.add("name3","name3","name3");
I am developing a website where I use a custom build jQuery widget to load data into multiple divs.
This is the code for the widget:
(function ($, window, document, undefined) {
$.widget ("my.contentloader", {
options: {
loading_message: true
},
_create: function () {
var that = this;
$.ajax ({
type: "POST",
url: that.options.url,
data: {data: that.options.formdata, limit: that.options.limit, offset: that.options.offset},
beforeSend: function (html) {
if (that.options.loading_message) {
$(that.options.target_area).html ("<div id='loading'>Loading</div>");
}
},
success: function (html) {
if (that.options.loading_message) {
$('#loading').remove ();
}
$(that.options.target_area).html (html);
},
error: function (html) {
$(that.options.error_area).html (html);
}
});
},
_setOption: function (key, value) {
this.options[key] = value;
$.Widget.prototype._setOption.apply (this, arguments);
}
});
})(jQuery, window, document);
I load data using the widget like this:
$('#targetdiv').contentloader ({
url: '<?php echo $action_url; ?>',
target_area: '#popup_box',
formdata: {'username' : username_email, 'password' : password}
});
I am having problems loading multiple instances on the same page.
Is there a way to not instantiate the widget on a specific div like this?
$('#targetdiv').contentloader
I think you need to assign each instance to a variable. That way, you can control each instance, or write a function that iterates over an array of instances.
var contentLoaders = [];
$('.target-div').each(function(i, data) {
contentLoaders[i] = $.widget("my.contentloader", { ... });
});
So then you should be able to operate on each loader independently, like:
for (var i in contentLoaders) {
var contentLoader = contentLoaders[i];
contentLoader.option( ... );
}
Also, you're using the DOM ID $('#loading') for multiple instances of the widget. This is wrong. You need to either use separate loaders for each widget, or else check to see if the ID exists and only insert the new node if it doesn't exist. And same for removing it.
** I've added this example block, hope it helps: **
//
// This is a way to do it if you want to explicitly define each contentloader.
// Below that, I'll write out a way to define the contentloaders in a loop.
//
var contentLoader1 = $('#targetdiv1').contentloader ({
url: '<?php echo $action_url; ?>',
target_area: '#popup_box',
formdata: {'username' : username_email, 'password' : password}
});
contentLoader1.option('url', 'http://google.com');
var contentLoader2 = $('#targetdiv2').contentloader ({
url: '<?php echo $action_url; ?>',
target_area: '#popup_box',
formdata: {'username' : username_email, 'password' : password}
});
contentLoader2.option('url', 'http:/apple.com');
// Push each widget instance into an array of widget objects
var contentLoaders = [];
contentLoaders.push(contentLoader1);
contentLoaders.push(contentLoader2);
for (var i in contentLoaders) {
console.log(i, contentLoaders[i].option('url'));
}
// Should print:
// 0 http://google.com
// 1 http://apple.com
//
//
// How to set a bunch of widgets at once from an array of content loader data
//
//
var contentLoaderData = [
{
divid: '#targetDiv1',
url: 'google.com',
formdata: {
username: 'joeshmo',
password: 'joeshmo1'
}
},
{
divid: '#targetDiv2',
url: 'apple.com',
formdata: {
username: 'plainjane',
password: 'plainjane1'
}
}
];
// Array of widget instances
var contentLoaders = [];
$.each(contentLoaderData, function(index, value) {
var contentLoader = $(this.divid).contentloader({
url: this.url,
target_area: '#popup_box',
formdata: {'username' : this.formdata.username, 'password' : this.formdata.password}
});
// Push each contentLoader instance into the contentLoaders array
contentLoaders.push(contentLoader);
});
for (var i in contentLoaders) {
console.log(i, contentLoaders[i].option('url'));
}
// Should print:
// 0 http://google.com
// 1 http://apple.com