Re: [libcvd-members] libcvd cvd/OSX/qtbuffer.h cvd_src/OSX/qtbuffer.cpp

[Gerhard Reitmayr]

I know the problem, here is the solution. You have to tell OSX that  
the application uses the Carbon API. This is done by adding an entry  
into resource fork of the binary. Finally I found some explanation  
for that here:
http://developer.apple.com/technotes/tn/tn2013.html (very end)

create a text file with the following contents:

data 'carb' (0) {};

then call Rez to write the resource to your binary:

/Developer/Tools/Rez resourcefile.r -o binary

/Developer/Tools/DeRez binary
will show you the results.

Now the dialog behaves like a real window and you even get an empty  
menu bar for your app and it appears in task switching etc. (but the  
main window will be an X window (if you use X) and belong to the X11  
app :)

Gerhard


On 14 Jan 2008, at 17:47, Georg Klein wrote:

> CVSROOT:        /cvsroot/libcvd
> Module name:    libcvd
> Changes by:     Georg Klein <georgklein>  08/01/14 17:47:15
>
> Modified files:
>         cvd/OSX        : qtbuffer.h
>         cvd_src/OSX    : qtbuffer.cpp
>
> Log message:
> 	Added a settingsdialog option to QTBuffer, so that a settings  
> dialog appears
> 	before video capture starts. This lets you choose video input,  
> sharpness
> 	etc. Since I have no idea how to program OSX, this a bit broken,  
> in that
> 	the supposedly modal dialog appears behind other windows, and  
> cannot be
>         moved or raised. Sweet!
>
> CVSWeb URLs:
> http://cvs.savannah.gnu.org/viewcvs/libcvd/cvd/OSX/qtbuffer.h? 
> cvsroot=libcvd&r1=1.2&r2=1.3
> http://cvs.savannah.gnu.org/viewcvs/libcvd/cvd_src/OSX/qtbuffer.cpp? 
> cvsroot=libcvd&r1=1.2&r2=1.3
>
> Patches:
> Index: cvd/OSX/qtbuffer.h
> ===================================================================
> RCS file: /cvsroot/libcvd/libcvd/cvd/OSX/qtbuffer.h,v
> retrieving revision 1.2
> retrieving revision 1.3
> diff -u -b -r1.2 -r1.3
> --- cvd/OSX/qtbuffer.h  7 Dec 2007 15:02:08 -0000       1.2
> +++ cvd/OSX/qtbuffer.h  14 Jan 2008 17:47:15 -0000      1.3
> @@ -95,7 +95,7 @@
>                 * @param mode color palette to use (not supported yet)
>                 * @param which camera to open (not supported yet)
>                 */
> -        RawQT(const ImageRef & size, unsigned int mode, unsigned  
> int num = 0);
> +      RawQT(const ImageRef & size, unsigned int mode, unsigned int  
> num = 0, bool showSettingsDialog=false);
>          virtual ~RawQT();
>
>                 /** Get the width in pixels of the captured frames. */
> @@ -135,7 +135,7 @@
>  public:
>      /// Construct a video buffer
>      /// @param dev file name of the device to use
> -    QTBuffer(const ImageRef & size, unsigned int number = 0 ) :  
> RawQT( size, 0, number ) {}
> +    QTBuffer(const ImageRef & size, unsigned int number = 0, bool  
> showSettingsDialog=false ) : RawQT( size, 0, number,  
> showSettingsDialog ) {}
>         
>      virtual ImageRef size()
>      {
>
> Index: cvd_src/OSX/qtbuffer.cpp
> ===================================================================
> RCS file: /cvsroot/libcvd/libcvd/cvd_src/OSX/qtbuffer.cpp,v
> retrieving revision 1.2
> retrieving revision 1.3
> diff -u -b -r1.2 -r1.3
> --- cvd_src/OSX/qtbuffer.cpp    7 Dec 2007 15:02:08 -0000       1.2
> +++ cvd_src/OSX/qtbuffer.cpp    14 Jan 2008 17:47:15 -0000      1.3
> @@ -85,7 +85,7 @@
>         return err;
>  }
>
> -RawQT::RawQT(const ImageRef & size, unsigned int mode, unsigned  
> int num) : pimpl(NULL)
> +RawQT::RawQT(const ImageRef & size, unsigned int mode, unsigned  
> int num, bool showSettingsDialog) : pimpl(NULL)
>  {
>         if( !RawQTPimpl::isInitialized ){
>                 EnterMovies();
> @@ -129,6 +129,14 @@
>         if(err != noErr){
>  		throw Exceptions::QTBUFFER::DeviceOpen("SGNewChannel returned  
> error");
>         }
> +       
> +       if(showSettingsDialog)
> +         {
> +	    err = SGSettingsDialog(pimpl->seqGrab, pimpl->chanVideo, 0,  
> NULL, 0L, NULL, 0);
> +           if(err != noErr)
> +	      throw Exceptions::QTBUFFER::DeviceOpen("SGSettingsDialog  
> returned an error");
> +         }
> +
>      try {
>             err = SGSetChannelBounds(pimpl->chanVideo, &pimpl->bounds);
>             if (err != noErr) {
>
>
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--
Gerhard Reitmayr
MIL, Engineering Department, Cambridge University
http://mi.eng.cam.ac.uk/~gr281/