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2004-03-03 Marcus Brinkmann <marcus@g10code.de>

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* gpgme.texi (I/O Callback Example Qt): New section by Marc Mutz.
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Marcus Brinkmann 2004-03-07 22:32:49 +00:00
parent 498347ce00
commit 887c31aa0a
1 changed files with 70 additions and 0 deletions
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@ -210,6 +210,7 @@ Using External Event Loops
* I/O Callback Example:: An example how to use I/O callbacks.
* I/O Callback Example GTK+:: How to integrate @acronym{GPGME} in GTK+.
* I/O Callback Example GDK:: How to integrate @acronym{GPGME} in GDK.
* I/O Callback Example Qt:: How to integrate @acronym{GPGME} in Qt.
@end detailmenu
@end menu
@ -4400,6 +4401,7 @@ programs.
* I/O Callback Example:: An example how to use I/O callbacks.
* I/O Callback Example GTK+:: How to use @acronym{GPGME} with GTK+.
* I/O Callback Example GDK:: How to use @acronym{GPGME} with GDK.
* I/O Callback Example Qt:: How to use @acronym{GPGME} with Qt.
@end menu
@ -4900,6 +4902,74 @@ my_gpgme_register_io_callback (void *data, int fd, int dir, gpgme_io_cb_t fnc,
@end example
@node I/O Callback Example Qt
@subsubsection I/O Callback Example Qt
@cindex Qt, using @acronym{GPGME} with
The I/O callback interface can also be used to integrate
@acronym{GPGME} with the Qt event loop. The following code snippets
show how this can be done using the appropriate register and remove
I/O callback functions. In this example, the private data of the
register I/O callback function is unused. The event notifications is
missing because it does not require any Qt specific setup.
@example
#include <qsocketnotifier.h>
#include <qapplication.h>
struct IOCB @{
IOCB( GpgmeIOCb f, void * d, QSocketNotifier * n )
: func( f ), data( d ), notifier( n ) @{@}
GpgmeIOCb func;
void * data;
QSocketNotifier * notifier;
@}
class MyApp : public QApplication @{
// ...
static void registerGpgmeIOCallback( void * data, int fd, int dir,
GpgmeIOCb func, void * func_data,
void ** tag ) @{
QSocketNotifier * n =
new QSocketNotifier( fd, dir ? QSocketNotifier::Read
: QSocketNotifier::Write );
connect( n, SIGNAL(activated(int)),
qApp, SLOT(slotGpgmeIOCallback(int)) );
qApp->mIOCBs.push_back( IOCB( func, func_data, n ) );
*tag = (void*)n;
@}
static void removeGpgmeIOCallback( void * tag ) @{
if ( !tag ) return;
QSocketNotifier * n = static_cast<QSocketNotifier*>( tag );
for ( QValueList<IOCB>::iterator it = qApp->mIOCBs.begin() ;
it != qApp->mIOCBs.end() ; ++it )
if ( it->notifier == n ) @{
delete it->notifier;
qApp->mIOCBs.erase( it );
return;
@}
@}
public slots:
void slotGpgmeIOCallback( int fd ) @{
for ( QValueList<IOCB>::const_iterator it = mIOCBs.begin() ;
it != mIOCBs.end() ; ++it )
if ( it->notifier && it->notifier->socket() == fd )
(*(it->func)) ( it->func_data, fd );
@}
// ...
private:
QValueList<IOCB> mIOCBs;
// ...
@};
@end example
@node Cancellation
@subsection Cancellation
@cindex cryptographic operation, aborting