Messages

1

General / [Sovled] Intergrating SFML into gtkmm

« on: February 21, 2011, 08:16:34 pm »

I know that this is a dead post, but instead of creating a new sf::RenderWindow on each resize, all he needs is a

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sf::Event event;
while (App.GetEvent(event)) ; loop and sfml will handle the size changes like it should(ie scaling everything correctly.

Just for future users like me who look at old posts on the forum.

2

General / Moving source code made in Windows to XCode on Mac Errors

« on: February 18, 2011, 06:41:52 am »

The errors indicate that you are trying to copy the non-copyable class of sf::Music, and then  fails to copy the classes sf::Music is derived from.

3

SFML website / A new tutorial on how to integrate with Gtk

« on: February 18, 2011, 06:28:04 am »

We do not have a tutorial on how to integrate with Gtk(we already have wxWidgets and Qt, the other major two gui frameworks), so I have created a guide based off Shy Guy's work.
I think we should add this next to the other tutorials.

I downloaded the Qt guide html page and changed the contents.
The guide can be found here: http://lalaland.github.com/gtkGuide.html

Hope you find it useful!

4

Feature requests / Thread management or the like in SFML2

« on: December 17, 2010, 03:25:37 pm »

I will assume here that you are using queue's of some sort to pass your instructions to the thread.

You might want to look into boost::thread for threading.
It is cross platform, commonly used,  has similar syntax to the coming c++0x standard, etc..

They also have lots of useful constructs, one of which, condition variables, seems to be the perfect thing you need.

A condition variable pauses a thread till another thread calls notify on it.

Here is an example use of a condition variable

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{
   boost::scoped_lock lock(AMutexForAQueue); //locks a mutex

   while (ASharedQueue.empty()) //We cannot do work while the queue is empty
   {
       cond.wait(); //wait
   }

someData = ASharedQueue.pop();
}

//Do stuff with data here

 

While waiting the mutex will be released.

Here is how the code would look on the main thread side.

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{
    boost::scoped_lock lock(AMutexForAQueue); //locks a mutex

    ASharedQueue.push(someTask); // push a task into the queue
}

cond.notify_one(); // start the thread

 

EDIT:  This method would also allow you to easily add more threads, as the condition variable is guaranteed to only notify one at a time.