Russian Qt Forum

#ifndef JMEDIAPLAYERPLUGIN_H
#define JMEDIAPLAYERPLUGIN_H

#include <QObject>
#include <JMediaPlayer.h>

class JMediaPlayerPlugin : public QObject, public JMediaPlayer
{
Q_OBJECT
Q_INTERFACES(JMediaPlayer)

public:
    ~JMediaPlayerPlugin();

};

#endif

#include <QtGui>
#include "JMediaPlayerPlugin.h"


JMediaPlayerPlugin::~JMediaPlayerPlugin()
{
}
Q_EXPORT_PLUGIN2(jmediaplayer, JMediaPlayerPlugin);

#ifndef JMEDIAPLAYER_H
#define JMEDIAPLAYER_H

#include <QString>

class JMediaPlayer
{
public:
//	JMediaPlayer() {};
	virtual ~JMediaPlayer() {};
};
QT_BEGIN_NAMESPACE
Q_DECLARE_INTERFACE(JMediaPlayer,"myplugins.JMediaPlayer/1.0");
QT_END_NAMESPACE

#endif

TEMPLATE        = lib
CONFIG           += plugin static
HEADERS          = JMediaPlayerPlugin.h
SOURCES          = JMediaPlayerPlugin.cpp
TARGET            = $$qtLibraryTarget(jmediaplayer)

#include "../libjplayer/JMediaPlayerPlugin/src/JMediaPlayer.h"
#include <QtPlugin>

Q_IMPORT_PLUGIN(jmediaplayer);

int main(int argc, char *argv[])
{
 ....
....
.....

main.o: In function `__static_initialization_and_destruction_0(int, int)':
main.cpp:(.text+0x1b): undefined reference to `qt_plugin_instance_jmediaplayer()'
collect2: выполнение ld завершилось с кодом возврата 1

TEMPLATE        = lib
CONFIG           += staticlib

int JMediaPlayerPlugin::getVolume()
{
	return 14;
}

virtual int getVolume();

	JMediaPlayer * my_player = new JMediaPlayer();
	qDebug() << "volume = " << my_player->getVolume(); 

mainwindow.o: In function `MainWindow::init()':
mainwindow.cpp:(.text+0x5210): undefined reference to `vtable for JMediaPlayer'
mainwindow.cpp:(.text+0x5219): undefined reference to `vtable for JMediaPlayer'
../libjplayer/JMediaPlayerPlugin/src/libjmediaplayer.a(moc_JMediaPlayerPlugin.o):(.data.rel.ro._ZTI18JMediaPlayerPlugin[typeinfo for JMediaPlayerPlugin]+0x18): undefined reference to `typeinfo for JMediaPlayer'
collect2: выполнение ld завершилось с кодом возврата 1

	foreach (QObject *plugin, QPluginLoader::staticInstances()){
		JMediaPlayer * my_player = qobject_cast<JMediaPlayer *>(plugin);
		if (my_player)	
                                       qDebug() << my_player->getVolume(); 
	}

../libjplayer/JMediaPlayerPlugin/src/libjmediaplayer.a(moc_JMediaPlayerPlugin.o):(.data.rel.ro._ZTI18JMediaPlayerPlugin[typeinfo for JMediaPlayerPlugin]+0x18): undefined reference to `typeinfo for JMediaPlayer'
collect2: выполнение ld завершилось с кодом возврата 1

QMAKE_CXXFLAGS += -fno-rtti