I am creating a application where the UI is been formed using WxPython. I am using a Panel with a HTML window.
In this HTML page which is displayed, I would like to extract information, for example the text of a textBox, which radio button is selected, a click of a button etc, and at the same time show some information to the user, like when a process was been completed and its result or similar information.
I am not finding a good way of doing that, as long I could understand, I will need to use Javascript or something to interact with the page in some way. But I could not find how to send and receive information to the page, and if the wx.html.HtmlWindow supports Javascript.
What would be the best way of doing that?
You could communicate through a socket. Create a local socket server on the python side, and then use javascript to connect to that socket. There are plenty examples of this around the web. See the docs for python Socket Server: https://docs.python.org/2/library/socketserver.html
It doesn't look like the wx.html module supports javascript or css:
This module contains a widget class and supporting classes for a generic HTML renderer. It supports only a subset of the HTML standards, and no Javascript or CSS, but it is relatively lightweight and has no platform dependencies. It is suitable for displaying simple HTML documents, such as the application’s documentation or built-in help pages.
It does look like you can handle the EVT_HTML_LINK_CLICKED event to tell when a user clicks a link, but I'm not sure how you would get the input from html form elements like textboxes, radio buttons, etc.
Your best bet may be to create a web app using a microframework like Flask and serve the app locally.
Related
Background:
I need to allow users to create web pages for various products, with each page having a standard overall appearance. So basically, I will have a template, and based on the input data I need the HTML page to be generated for each product. The input data will be submitted via a web form, following which the data should be merged with the template to produce the output.
I initially considered using a pure templating approach such as Nunjucks, but moved to ReactJS as I have prior experience with the latter.
Problem:
Once I display the output page (by adding the user input to the template file with placeholders), I am getting the desired output page displayed in the browser. But how can I now obtain the HTML code for this specific page?
When I tried to view the source code of the page, I see the contents of 'public/index.html' stating:
This HTML file is a template.
If you open it directly in the browser, you will see an empty page.
Expectedly, the same happens when I try to save (Save As...) the html page via the browser. I understand why the above happens.
But I cannot find a solution to my requirement. Can anyone tell me how I can download/save the static source code for the output page displayed on the browser.
I have read possible solutions such as installing 'React/Redux Development Extension' etc... but these would not work as a solution for external users (who cannot be expected to install these extensions to use my tool). I need a way to do this on production environment.
p.s. Having read the "background" info of my task, do let me know if you can think of any better ways of approaching this.
Edit note:
My app is currently actually just a single page, that accepts user data via a form and displays the output (in a full screen dialog). I don't wish to have these output pages 'published' on the website, and these are simply to be saved/downloaded for internal use. So simply being able to get the "source code" for the dislayed view/page on the browser and saving this to a file would solve my problem. But I am not sure if there is a way to do this?
Its recommended that you use a well-known site generator such as Gatsby or Next for your static sites since "npx create-react-app my-app" is for single page apps.
(ref: https://reactjs.org/docs/create-a-new-react-app.html#recommended-toolchains)
If I'm understanding correctly, you need to generate a new page link for each user. Each of your users will have their own link (http/https) to share with their users.
For example, a scheduling tool will need each user to create their own "booking page", which is a generated link (could be on your domain --> www.yourdomain.com/bookinguser1).
You'll need user profiles to store each user's custom page, a database, and such. If you're not comfortable, I'll use something like an e-commerce tool that will do it for you.
You can turn on the debugger (f12) and go to "Elements"
Then right-click on the HTML tag and press edit as HTML
And then copy everything (ctrl + a)
Django shows you forms when you do basic coding, right?
Where is the html of the automatically generated form in windows?
So instead of looking for a template folder, once the developer writes the url or views code, he finds the location of the skeleton-only html that Django shows.
In my opinion, it looks like it's built somewhere like an "anaconda/envs" contains a separate virtual environment, but I can't find it.
it's maybe path?
It's well documented:
https://docs.djangoproject.com/en/2.2/ref/forms/renderers/
It loads templates first from the built-in form templates directory in
django/forms/templates
unless you have 3rd party libraries included that override these templates.
However, a quick check in https://github.com/django/django/tree/master/django/forms/templates/django/forms/ shows that this directory is empty.
tl;dr
Django does not render any forms from scratch (unless it's the Admin which of course creates its whole UI automatically). It just enables you to quickly create a template that can render your form but you will still have to provide a basic template (aka HTML markup with dynamic parts) yourself.
I am using the ionic framework and would like to be able to read from the HTML from the current webpage and then send the selection back to my application.
I have the Theme-able Browser Plugin setup and can use it like any other web browser.
I have tried looking at ways to include my own script with the .executeScript() function but no luck.
I have also tried to read data from custom buttons that I have inserted into the tool/nav bar but that gives me the HTML of my application.
TL;DR: (Basically want access to the DOM of the current webpage and have the user use native selection to read the document.getSelection() and send that text back to my application.)
Any help would be highly appreciated.
After browsing the forums on Ionic I found the solution:
browser.executeScript({code:'window.getSelection().toString();'}).then((selection)=>{
packet.text = selection[0];});
This allows me to get the selection.
I am trying to have node red go to my router IP and search through the HTML code to see whether a certain device is on the list. When I right click - inspect I can hover over the list I am interested in and see the HTML information I am looking for. When I use the HTML node it seems to only look through the view page source information, which does not have what I am looking for. I there a way to point the HTML node at a more specific element instead of the page source as a whole?
It sounds like the data in the page on your router might be dynamically generated using JavaScript.
This means that when the page is loaded it only has the outline and the rest is filled in by the code using XHResquests to a different URL that supplies the information.
In order for Node-RED to be able to extract the information from the page it would need to load the outline, then effectively run all the JavaScript. Libraries like PhantomJS
There is a contrib node that might be able to help node-red-contrib-nbrowser but the better approach would probably be to work out what URL the JavaScript is calling and calling that directly as the data is most likely to be in a format that is easier to process (e.g. JSON)
Can I refresh a HTML component in JSP? I have two dropdowns. On selection of a value in the first dropdown the values in the dropdown box are to be fetched from the database. Is this possible using JSP?
First, JSP is just a view technology which provides a template to write HTML/CSS/JS in and offers facilities to interact with backend Java code using taglibs (like JSTL) and expression language (those ${} things). JSP runs at the server machine, produces a HTML page and sends it to the client side (if you rightclick page and view source in webbrowser, then you should not see any line of Java/JSP code if it has done its work right). JSP does not run at the client machine and can therefore not be directly used to do partial updates in the HTML page.
To achieve what you want, you need to use JavaScript to fire an asynchronous HTTP request (also known as the Ajax technique) to retrieve the data and manipulate the HTML DOM tree accordingly to add the new elements. Since methods to fire Ajax requests and manipulate the HTML DOM may differ among webbrowsers, I strongly recommend to pick the jQuery JavaScript library to keep it concise and simple without any worries about functioning in different webbrowsers.
I've posted an answer in detail about this before, check solution #3 in this answer.