Standard GUI framework inspired by Qt

Aram via Digitalmars-d digitalmars-d at
Tue Mar 3 10:43:48 PST 2015

Hi all

I've been thinking over a GUI framework for D for some time, and 
ended up with idea expressed by Andrew Fedoniouk here: 
That is, having a separate drawing layer, and widgets built on 
top of it. But since it has already been discussed 9 years ago, I 
wonder if such a framework has ever been implemented.

In that duscussion many participants agreed that Qt would be a 
good foundation, but had very restrictive license. Things have 
changed since then, and Qt now is available under LGPL, which, to 
my undestanding, makes it suitable for the purpose of standard 
GUI library (please correct me if I am wrong on this). The 
license, of course, may change in the future, preventing us from 
using their updates for our drawing engine. But if we are able to 
start using the engine now, in the future we can maintain the 
updates ourselves.

Now, how I envision the library's design:

The library will be mostly implemented in D, except for drawing 
engine and event loop, which are system-dependent. Those two 
parts will be extracted from Qt into a separate library which 
will be linked to by the rest of framework either statically or 
dynamically. There will be bindings for sending drawing 
instructions to drawing engine, as well as for retrieving system 
and GUI events from event loop.

The system-independent part will mimic architecture of Qt. 
However, for maximum flexibility and customizability, GUI will 
utilize QML+CSS approach, and Qt's layout manager classes will be 
dropped completely. Also there is no need to port classes that 
are available in D, such as collections and strings.

If there is no standard GUI for D yet, and if LGPL license fits 
our purpose, then I am looking for 2-3 Qt experts to join me and 
build the framework.


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