I'm having some trouble with this issue and would really appreciate your help.
My goal is to convert a canvas into an image using toDataURL when a link, button, or image is clicked. Once the image is generated, I want it to open in a new window.
Can anyone guide me on how to pass the data URL created from toDataURL to a new window using Ruby on Rails?
Thank you in advance.
To begin with, this solution doesn't have much relation to Rails. However, you can utilize Ruby to solve the issue at hand.
To start, retrieve the canvas content as you're currently doing:
var dataURL = canvas.toDataURL("image/png");
At this stage, you have the option to simply open a new window using JavaScript and display the image directly there without requiring any server interaction:
var window = window.open();
window.document.write('<img src="'+dataURL+'"/>');
$('a.my-link').click(function(){
open().document.write('<img src="'+dataURL+'"/>');
return false;
});
For demonstration purposes, here is a quick fiddle: http://jsfiddle.net/XtUFt/
Alternatively, you could transmit the base64 string to the server and let your application create an actual image, then utilize a view to showcase it:
var base64 = dataURL.replace(/^data:image\/(png|jpg);base64,/, "") ;
var window = window.open('http://www.yourapp.com/controller/action?base64='+base64);
This example has been simplified and assumes a very small image size. For larger images, consider using a 'post' request since passing such long strings in the URL might not work efficiently!
On the server side, you can use the following code to generate the image:
require 'base64'
File.open('your/image/path/and/name.gif', 'wb') do|f|
f.write(Base64.decode64(params[:base64]))
end
Ultimately, it's just a matter of displaying the image and rendering a suitable view.
Apologies for the delay, but I have a simple solution for you:
window.open(document.getElementById("mycanvas").toDataURL());
Hopefully this handy snippet proves useful to someone down the line.
Here's how I tackled it:
const imageDataURL = canvas.toDataURL("image/png");
const newWindow = window.open(imageDataURL, 'Image', '_blank');
newWindow.focus();
Sharing in hopes that it benefits someone down the line.
My website consists of one static page with an HTML and CSS file. Oddly enough, when testing the page and inputting content into a multiline textarea until it overflows, the browser fails to display a scrollbar. Despite inspecting the div with the id &apos ...
I have been struggling to create a dependent dropdown list using ajax and php, but unfortunately I am not getting the desired outcome. Below is my ajax code: <html> <head> <title>findperson</title> <script type="text/javascript ...
I am currently working on a redux-form that contains a component for tags. I am struggling to figure out how to retrieve the tag values in an array as a payload. Any help would be greatly appreciated. Below is the code snippet for the tags component: ...
Once I have requested permission from the user of the website, I need to confirm if they have granted permission before triggering the send() function. What is the most sophisticated approach to achieve this? ...
Currently, I have set up the images in a grid format using the and components from MaterialUI. However, I am looking to implement an additional feature where when a user clicks on a specific image from the grid, a border is displayed around that select ...
I'm currently facing a challenge in accessing links to attachments for a web automation project. The issue lies in the fact that while I can view the HTML Code (divs and tables) when loading the webpage via Chrome and inspecting element, all I see in ...
I currently have a Leaflet map displaying weather data retrieved from a Json source. There is already a function in place that updates the data every x minutes using setInterval. setTimeout(function () { refreshId = setInterval(function () { ...
Struggling with making the hamburger menu appear on my friend's site. Spent hours trying to troubleshoot, but still can't figure out why it's only showing up as a red box and appearing on larger screens instead of just smaller devices. Frust ...
I'm having trouble assigning values from a method to variables in HTML. Here's what I have in my code: <b-card-text>X position {{xpos}}</b-card-text> <b-card-text>Y position {{ypos}}</b-card-text> I would like to assign v ...
Introduction - I've implemented a feature where multiple modal windows can be opened on top of each other and closed sequentially. Recently, I added a blur effect that makes the background go blurry when a modal window is open. Subsequently opening an ...
I've come up with this code to define the instance of my plugin: $.fn.someplugin = function(opts) { $(document).on('click', '.option-1', function() { alert(1); }); }; To make my plugin work, I utilize code similar to this ...
Within my array of objects, the structure is as follows: var locations = [ [{id: 1, lat: 51.52376322544537, lng: 5.13785702262885, content: 'Title A'}], [{id: 2, lat: 51.52358632767757, lng: 5.137921395645208, content: 'Title B'}], [{i ...
Is it possible to split a large index.js file into multiple files in order to better organize the code? Specifically, can Firebase triggers be written in separate JavaScript files? If so, could you please provide guidance on how to do this properly? child. ...
After delving into Angular 7 for a few weeks, I find myself faced with the challenge of toggling the visibility of a child component called <app-child-2> within a Parent component named <parent>. This toggle action needs to be triggered by a cl ...
Consider the following function signature: export const readVariableProps = function(obj: Object, props: Array<string>) : any { // props => ['a','b','c'] return obj['a']['b']['c'] ...
I have a challenge where I need to execute different actions for specific divs. Here is the code snippet I currently have: $("#pending-cancel-1, #pending-cancel-2").click(function(){ Do something special for pending-cancel-1 and pending-cancel-2... }) ...
I'm new to utilizing vuetify and I am curious if there is a method to set a value for a v-select using a function. My form can create an enterprise, leveraging apollo.js to connect with the database. Although all fields populate correctly when modifyi ...
I have encountered an issue while trying to save XML content, received as plain text, into my site's database. I came across advice suggesting not to store XML in a text field but instead use a blob. So, I proceeded to save it as a blob using CORS and ...
I'm currently working on an Express application and I am trying to capture all routes to redirect users to /public/app/index.html: app.all('/*', function (req, res, next) { // Let's just serve the index.html for other files to enab ...
Here's a challenging question that I've been pondering... Issue: I am using a virtual keyboard that needs to interact with different text fields on various pages. Every time I click on a text field, the keyboard should appear, and every key I pr ...