Multi-threaded GUI

[Dmitry Olshansky]

On 25-Jul-12 22:34, Gor Gyolchanyan wrote:
> Hi!
>
> I'm trying to write a WinAPI example to have multi-threaded GUI. I wanna
> have a Window class, which creates a window and listens to its messages
> in a separate thread when constructed.  This will allow me to write a
> main function like this:
>
> void main()
> {
>      Window w = new Window;
>      w.move(100, 200);
>      w.resize(800, 600);
>      w.show();
> }
>
> The methods called for the window will send asynchronous messages, which
> will cause the window to change its position, size and visibility
> on-the-fly.

Use plain WinAPI SendMessage in all threads and one separate thread for 
GUI message pump.
In fact you can change shape and visibility of any window in a system. 
And you do not need to be superuser. Hence proliferation of locker type 
Trojans. Who told Windows is boring? ;)

>This is convenient, because no message loop needs to be
> launched separately and every window will rocess its messages in a
> separate thread.
>
> Can anyone please tell me how to achieve this?
>
The problem is that WinAPI event loop was created with single message 
pump per application. Hence problematic separation of window per thread.

Again that most straightforward (and effective) design is to use 1 
thread for all UI and a bunch of workers for other stuff and you are 
good to go.

Or, in your model, it looks like GUI is a background process, and 
workers rule it, interesting view esp w.r.t. user perspective :)

-- 
Dmitry Olshansky