Enhancing a KineticJS Canvas with Real-time Updates using Meteor

Looking to synchronize the position of a KineticJS object with Meteor.

The issue seems to be with:

  Players.update({name: "Rect"}, {xpos: this.attrs.x})

The Meteor documentation states:

  // Find the document with id "123", and completely replace it.
  Users.update({_id: "123"}, {name: "Alice", friends: ["Bob"]});

I attempted to verify if the data was updating using:

  console.log(Players.findOne({name: "Rect"}).xpos);

Check out the GitHub repository here:

https://github.com/randompast/randomtests/tree/master/meteorCanvasTest

javascriptmongodbcanvasmeteorkineticjs

Answer №1

When updating your attributes, always remember to use $set to avoid overriding existing values such as the name attribute. In this case, by repeatedly updating without using $set, the 'rect' attribute was not being properly updated. 

Players.update({name: "Rect"}, {$set: {xpos: this.attrs.x}})

if (Meteor.is_client) {
  Players.find().observe({
    changed: function(new_doc, idx, old_doc) {
      if(MyTest.rect) {
        MyTest.rect.attrs.x = new_doc.xpos;
        MyTest.layer.draw();
      }
    }                      
  });  
  ....

    MyTest.rect.on("dragend", function() {
      Players.update({name: "Rect"}, {$set: {xpos: this.attrs.x}});
    });
  ....

}

Make sure to include the observe function and ensure that your dragend event is utilizing the $set notation.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

What leads to Mongoose's `updateMany` method resulting in `{ acknowledged: false }`?

I am currently working on implementing notification setup for an Express app using MongoDB. One of the challenges I am facing is related to updating the 'readBy' field in MongoDB when a user's id is pushed to it in order to mark notificatio ...

node.jsmongodbexpressmongoose

Enable JSON Data Management through Express

I am utilizing the lowDB dependency to manage JSON data in conjunction with Express, and for the most part, it is functioning properly. However, I have encountered a bug that I am struggling to resolve. I have created a /create page where users can input ...

javascriptnode.jsexpress

Splitting elements into two categories with Angular.JS: Comparing ng-hide and filter

My task is to take an object with data and display it in two separate lists. The structure of the object is as follows: var data = [ {name: "Something 1", active: 1, datetime: "goes", author: "here"}, {name: "Something 2", active: 0, datetime: "goes ...

javascriptangularjs

Tips for implementing a single function across multiple HTML classes using JavaScript

For the past few days, I've been struggling with a JavaScript issue as a newcomer to the language. $(document).on('click', '.content-click', function(){ $(".content-click span").toggleClass("clicked"), $(".content-view") ...

javascriptjqueryhtmlcss

Create an innovative mobile application (utilizing Cordova) that incorporates a cutting-edge Polymer component to enable

Currently, I am in the process of developing a mobile application with Cordova. The application utilizes polymer 2.0 components to facilitate the creation of master/child records in the database. One of the challenges I am facing is integrating file upl ...

javascriptandroidhtmlcordova

Is there a way to change the color of a specific tab without affecting the content within it

I am attempting to change the color of an individual tab using jQuery. However, when I set the background attribute in CSS, it colors the entire background instead. What specific property should I be setting to only change the color of the tab itself? ...

javascriptjqueryhtmlcss

Utilizing the each() method to cycle through multiple unordered lists and concealing any nested list items exceeding a count of 8

Struggling to figure out how to loop through all ul elements with a class of ul.children and hide any child elements under ul.child that exceed 8. See the snippet of code below for reference: $(function() { $('ul.children').each(function() { ...

javascriptjqueryhtmlcss

Comparison Between React-Redux mapStateToProps and Inheriting Props from ParentsIn the

Excuse my lack of experience, but I am currently delving into the world of react-redux and trying to grasp the concepts as I progress. Situation: In my main component within a react-redux application, I have the following snippet at the end: function map ...

javascriptreactjsreduxreact-redux

Error: The variableRegex is unable to execute the object foundTranslation, producing a TypeError in the replaceDynamicString function

While experimenting with a UIkit react app, I decided to modify some text on the front end website and encountered this error message. Could it be that the issue lies in the fact that the specific text in question does not have a corresponding translation ...

javascripthtmlreactjsfrontendgetuikit

Developing API requests depending on the input provided by users in a search field

Greetings everyone, I have a question that deals more with logic than code. I am currently working on an app where users can filter through various job types and access information about each role. While I have all the data stored in a database, I want us ...

javascriptreactjsmongodbexpressmern

Leveraging JavaScript event handlers within a progress wizard located within an update panel

I need assistance with implementing a password strength meter for a textbox within a wizard control. The issue I'm facing is that the password box does not become visible until step 4, preventing me from registering an event handler onload(). Placing ...

asp.netjavascriptajaxwizard

Changing the state variable upon clicking to display varying components

Being new to React, I am exploring how to load different components based on state variables. I am looking for a way for my handler to dynamically determine which state variable I am updating without explicitly passing the state name as a string. List of ...

javascriptreactjsstate

What is the process for loading a CTM file during startup in the three.js editor?

After encountering this query: How can I create a custom default scene in the three.js editor?, I experimented with loading a .ctm file. Unfortunately, it appears that a different method is needed for this task. What steps should I take to ensure success ...

javascriptthree.jseditor

What is the process by which React loads and runs JSX content?

What is the method used to identify and handle JSX code? <script src="src/main.js" type="text/babel"></script> ...

javascriptreactjs

Working with variables passed from Node.js in Jade processing

Currently, I have a situation where my script is sending a matrix that looks like this: [[1,2,3,4], [7,6,5,4], [2,3,4,5]]. After sending it using res.send(JSON.stringify(dataArray)); and viewing it in jade with h1#results, I can see that the format appears ...

javascriptajaxnode.jsexpresspug

Error encountered: The fiber texture failed to load due to a component becoming suspended during the response to synchronous input

I'm encountering an issue while attempting to load a texture through the TextureLoader: const texture = useLoader(TextureLoader, '/textures/texture.png') The error message I receive from react is as follows: ERROR A component suspended w ...

javascriptreactjsthree.jsfibers

AngularJS click directives and Google Chrome's content protection policy

Here is an interesting scenario I encountered recently. The new Google Chrome's Content Security Policy now prohibits the use of inline scripts or event handlers like onclick or ontouch within the HTML itself. This means that we are required to write ...

javascriptjqueryangularjsgoogle-chromecontent-security-policy

How can I show information stored in a MongoDB database on an HTML page using Gin-golang?

I am attempting to verify if MongoDB contains data with a specific username and password. However, instead of retrieving the specified data, I am currently receiving all the data. Please see my code below: r.POST("/login", func(c *gin.Context) { loge ...

mongodbgogo-gin

Angular Selectable Drop-down Menu

I'm facing an issue with using angularjs for dropdown with multiple selection. When I try to include 2 dropdowns in the same form, only one of them gets initialized properly. Here is a sample code snippet http://jsfiddle.net/vUSPu/1221/. Can someone p ...

javascriptangularjsdropdown

Troubleshooting legacy components integration in Next.js (Error resolving 'react/jsx-dev-runtime' and issue with importing Global CSS files)

I've recently set up a fresh Next.js project (React v 17.0.1) and I'm trying to import components from an older project, but I'm running into some errors: Module not found: Can't resolve 'react/jsx-dev-runtime'. It seems like ...

javascriptreactjsnext.js