Re: Use Django to implement my GUI!

Hi Jani!

I haven't seen the last statements of your post, whre you say I'm not really clear and that i'm building a non-http GUI using Django.


OK let's stay on the rendering issue only, and specify things simply. This is a simple description of the architecture I want to set up :

- A Client (not a user interface). Client here means a module which is installed in a remote computer and communicate with the server via socket.

- A server listening from several remote client (Here i'm not talking yet about http request), and receive informatons from them. In fact client must be doing actions and send informations about their actions to the server. In the oder hand data to be processed by each client is pushed/dispatched by the server.

- And admin (not Django Admin, but admin in the sens of my app), destined to be the module allowing use of the application. Then the Admin module is part of the server and will proviede a GUI for manipulating data in the data base. It's in this GUI that users of the application will enter their request, by filling a form or clicking a link for exemple. And data from the GUI could be stored in the data base, while being send to the remote clients (not to be displayed by the client, but to be processed). In the same way, informations comming from those clients to the server have to be diplayed in the GUI.

With a graphical GUI, The server could have a reference to an object representing my GUI, and it will be done.
But I choose a web GUI for view and administration. It's where Django comes.

And my problem is to make my server being running a network thread, receiving data from the GUI(web browser) and sending informations update to the GUI (for web page content).

This is really my issue. If all the actions of my server depended on my GUI request (http request), I could do what I like behind when handling a http request, but while managing http:8080 connexions, the application is running another process/thread on another TCP/UDP port.

And yes I want a web GUI.

Is why I'm looking the best way to achieve that. We can exclude Django web server, as it will not be used in production for the application deployment.

Hope now it's clear for you, and more for the other users.

Thanks!

2012/5/13 Jani Tiainen <redetin@gmail.com>

Hi,

There is several ways to achieve what you maybe want to do. One of the simplest way is separate frontend (your userinterface) and server backend. You can build your Django application as a service (xml-rpc, json-rpc, restful). That would give you advantage to choose whatever frontend you like. Of course it would add some overhead.

On Sun, May 13, 2012 at 1:14 PM, Eugene NGONTANG <sympavali@gmail.com> wrote:

Hi!

I'm a python developper, but new in django.

I'm devolopping a multi clients-server application.

The server and the clients are communicating via sockets, The server
receive somme states from clients, and display them in the User
interface.
In the other hand, the server has to send a message(packet) to the
client when an event  occurs in the GUI, and data are stored in a
database.

Note that Django is mainly built for web (HTTP protocol based) applications. In such an environment you run two different things: your GUI (usually browser) that is totally ignorant of server side (Django). Then you send request to some URL, Django routes it to some view and view produces again next output to be displayed in GUI (browser again). One of the common functions in the view is database manipulation.

 

Then I choose to make a web interface where data could be viewed and
manipulated. And I discovered Django, which fit all my needs. I tested
and liked the framework.

My questions are:
- Can I override the djando admin methods so that i can not only
customized my views and html page, but also manipulate objects in
database, so that i can do another action when catching an  event in
the GUi.
For example, taking the django admin tutorial, I would like to do and
action like sending a message the user choose "add a poll". How can I
do those things? Cause I noticed that method that alter data in data
base are part of django admin module and cannot be overriden

You shouldn't "fight against admin". If something cannot be done in the admin you usually get a way with writing your own stuff.

 

- To achieve what I want, i would like to run my server engine and my
django admin in two separated threads. How do i run my admin module in
a thread? Cause till now i'm using the command line "python manage.py
runserver

Again your GUI would run "somewhere" (it's not relevant) and it's not concern of Django. It's architecture is designed to be share nothing - which means that you can run several threads/processes of your applications - And those threads/processes are not aware of other existence. And it doesn't matter.

 

- I also tried to overide tables name, and foreign keys names. Could
you guys provide me a true life example?

Err.. Override what and where? And how you tried to do that?

 

- And now in the production step, I would like you guys to tell me
what to choose for serving files. I would like to with your experience
what's better between running a unicorn server or apache with mod_wsgi

I don't know if i'm clear, but i hope. In brief I'd like to use the
django framework features to design my Gui like i want, customize
interactions between the gui and the backend, and choose a good web
server for the production.

No you're definitely not clear. My interpretation is that you want to build (non-http based) GUI using Django as backend server. Even Django isn't exactly designed for such a work it still can do it. 

If it was something else try to split your questions in smaller fragments, perferably with more clearly specified use cases, workflows and samples of the code.

 

Thank you for advance

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