Re: [osg-users] viewer loaded from dll not responsive to events

J.P. Delport Sun, 03 Jan 2010 23:43:54 -0800

thanks

Trajce Nikolov wrote:

Here is the code snippet. All the viewer stuff is created from withinthe dll I am loading and the main thread is forwarding messages to it

osg::ref_ptr<osgDB::DynamicLibrary> dll =osgDB::DynamicLibrary::loadLibrary("bin/ig/KtIGLibOSG/KtIGLibOSG.dll");

if (dll.get())
{

osgDB::DynamicLibrary::PROC_ADDRESS proc =dll->getProcAddress("createIGLib");

if (proc)
{
createIGLibFn *fn = (createIGLibFn*)proc;
lib = fn(0,0);
}
}

lib->init();

while (!lib->isDone())
{
#ifdef WIN32
MSG msg;
if (::PeekMessage(&msg,NULL,0,0,PM_NOREMOVE))
{
::GetMessage(&msg, NULL, 0, 0);
lib->postMessage((void*)&msg);
}
#endif
}

void KtIGLibOSG::postMessage(void* msg)
{
if (mViewer.valid())
{
osgViewer::CompositeViewer::Windows wins;
mViewer->getWindows(wins);
#ifdef WIN32

osgViewer::GraphicsHandleWin32 *hdl =dynamic_cast<osgViewer::GraphicsHandleWin32*>(wins.at <http://wins.at>(0));

if(hdl)
{
MSG* message = (MSG*)msg;
WNDPROC fWndProc = (WNDPROC)::GetWindowLong(hdl->getHWND(), GWL_WNDPROC);

fWndProc(hdl->getHWND(), message->message, message->wParam,message->lParam);

}
#endif
}
}

hope it helps

Nick

http://www.linkedin.com/in/tnick
Sent from Izmit, 41, Turkey

On Mon, Jan 4, 2010 at 9:06 AM, J.P. Delport <[email protected]<mailto:[email protected]>> wrote:


    Hi Nick,


    Trajce Nikolov wrote:

        Hi J.P.

        exactly, the same issue. I made it work though with dispatching
        messages from the main thread to the other from the dll and it
        works this way.


    Could you expand on how you do this. I'd like to forward to our
    Windows developer.

    thanks
    jp


        Nick

        http://www.linkedin.com/in/tnick
        Sent from Izmit, 41, Turkey

        On Mon, Jan 4, 2010 at 8:48 AM, J.P. Delport
        <[email protected] <mailto:[email protected]>
        <mailto:[email protected] <mailto:[email protected]>>> wrote:

           Hi,

           I've had similar issues. See this thread:

http://thread.gmane.org/gmane.comp.graphics.openscenegraph.user/50527


           jp

           Trajce Nikolov wrote:

               Hi Wojtek,

               the same setup I have here, all in dll. Not working though,
               windows7. I had to do some hacks with the win32 messaging to
               make it work

               Nick

               http://www.linkedin.com/in/tnick
               Sent from Devlet, Ankara, Turkey

               On Mon, Dec 21, 2009 at 11:49 AM, Wojciech Lewandowski
               <[email protected] <mailto:[email protected]>
        <mailto:[email protected] <mailto:[email protected]>>
               <mailto:[email protected]
        <mailto:[email protected]> <mailto:[email protected]
        <mailto:[email protected]>>>>

               wrote:

                  Hi Guys

                  I doubt your problem is directly related to DLL use.
        We have
               a code
                  at the company where allmost all OSG stuff including
        osgViewer
                  creation is loaded as dynamic DLL plugins. Its built
        with VS 2008
                  Express. All works correctly and we see no problem with
               window focus
                  or similar things. I suspect something might get lost in
               translation
                  to DLL. Mangled args passed to viewer, mixed library
        models,
                  overrriden HINSTANCE or somethin like this...( these
        are very
               fuzzy
                  thoughts, if I was to elaborate I would not be able to
        tell
               how they
                  could directly affect DLL window setup).

                  Cheers,
                  Wojtek

                  --------------------------------------------------
                  From: "Robert Osfield" <[email protected]
        <mailto:[email protected]>
               <mailto:[email protected]
        <mailto:[email protected]>>
                  <mailto:[email protected]
        <mailto:[email protected]>
               <mailto:[email protected]
        <mailto:[email protected]>>>>

                  Sent: Monday, December 21, 2009 10:21 AM
                  To: "OpenSceneGraph Users"
               <[email protected]
        <mailto:[email protected]>
               <mailto:[email protected]
        <mailto:[email protected]>>
                  <mailto:[email protected]
        <mailto:[email protected]>
               <mailto:[email protected]
        <mailto:[email protected]>>>>

                  Subject: Re: [osg-users] viewer loaded from dll not
               responsive to events


                      Hi Nick,

                      I'm no windows programmers, but vaguely recall a
               restriction on
                      events
                      and the main thread, osgViewer has code built in
        to cope
               with this,
                      but don't recall any issues with loading a viewer
        from a dll.

                      The best platform for handling really flexible window
               creation
                      is the
                      oldest one we support... X11.... allows you great
        control
               over
                      events
                      and is far better than Windows and OSX for this.  Alas
               sometimes
                      technologies go backwards overtime....

                      Robert.

                      On Sun, Dec 20, 2009 at 11:01 PM, Trajce Nikolov
                      <[email protected]
        <mailto:[email protected]>
               <mailto:[email protected]
        <mailto:[email protected]>>
               <mailto:[email protected]
        <mailto:[email protected]>
               <mailto:[email protected]
        <mailto:[email protected]>>>> wrote:

                          Hi,
                          I am loading my viewer from a dll and as the topic
               says, it
                          does not respond
                          to any events. Windows platform. Any ideas?
                          There is a way I think to put message hooks
        but it is
               more
                          then a hack then
                          a real solution
                          Thanks
                          Nick

                          http://www.linkedin.com/in/tnick

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