Russian Qt Forum

#include <QObject>
#include <QtCore>
#include <QString>

class pluginInterface : public QObject
{
public:
	virtual ~pluginInterface() {}
	virtual QString getAuthor() = 0;
};

Q_DECLARE_INTERFACE (pluginInterface, "zodiac.pluginInterface/1.0")

#include <QtCore>
#include "../pluginInterface.h"

class testPlugin : public pluginInterface
{
	Q_OBJECT
	Q_INTERFACES(pluginInterface)

public:
	QString getAuthor()
	{
		return "zodiac";
	}
};

Q_EXPORT_PLUGIN(testPlugin);

	pluginsDir = QDir(qApp->applicationDirPath());

	pluginsDir.cd("plugins");

	foreach (pluginFileName, pluginsDir.entryList(QDir::Files))
	{
		QPluginLoader loader(pluginsDir.absoluteFilePath(pluginFileName));
		plugin = loader.instance();

		QMessageBox::information(0, "!!!", loader.errorString());
	}

#include <QtCore>
#include "../pluginInterface.h"

class testPlugin : public QObject, public pluginInterface
{
	Q_OBJECT
	Q_INTERFACES(pluginInterface)

public:
	QString getAuthor()
	{
		return "zodiac";
	}
};

Q_EXPORT_PLUGIN2(testPlugin, testPlugin);

#include <QObject>
#include <QtCore>
#include <QString>

class pluginInterface
{
public:
	virtual ~pluginInterface() {}
	virtual QString getAuthor() = 0;
};

Q_DECLARE_INTERFACE (pluginInterface, "zodiac.pluginInterface/1.0")

zodiac@zodiac ~/Desktop/crypt/main/plugins $ nm libtest_plugin.so
00002034 d DW.ref.__gxx_personality_v0
00001e6c a _DYNAMIC
00001ff4 a _GLOBAL_OFFSET_TABLE_
         w _Jv_RegisterClasses
         U _Unwind_Resume@@GCC_3.0
00002040 b _ZGVZ18qt_plugin_instanceE9_instance
         U _ZN11QMetaObject11changeGuardEPP7QObjectS1_
         U _ZN11QMetaObject11removeGuardEPP7QObject
00000be0 W _ZN15pluginInterfaceD0Ev
00000c10 W _ZN15pluginInterfaceD1Ev
         U _ZN7QObjectC2EPS_
00001e64 V _ZTI15pluginInterface
00000ca0 V _ZTS15pluginInterface
         U _ZTV10testPlugin
00001e50 V _ZTV15pluginInterface
         U _ZTVN10__cxxabiv117__class_type_infoE@@CXXABI_1.3
00002048 b _ZZ18qt_plugin_instanceE9_instance
         U _ZdlPv@@GLIBCXX_3.4
         U _Znwj@@GLIBCXX_3.4
....

class testPlugin : public QObject, public pluginInterface

class testPlugin : public pluginInterface, public QObject

#include <QtCore>
#include "../pluginInterface.h"

class testPlugin : public QObject, public pluginInterface
{
	Q_OBJECT
	Q_INTERFACES(pluginInterface)

public:
	QString getAuthor()
	{
		return "zodiac";
	}
};

#include "test_plugin.h"
Q_EXPORT_PLUGIN2(testplugin, testPlugin);

#include "cryptMain.h"
#include "pluginInterface.h"
#include <QtGui>
#include <QMessageBox>

cryptMain::cryptMain(QWidget *parent) : QMainWindow(parent)
{
	setupUi(this);

	pluginsDir = QDir(qApp->applicationDirPath());

	pluginsDir.cd("plugins");

	foreach (pluginFileName, pluginsDir.entryList(QDir::Files))
	{
		QPluginLoader loader(pluginsDir.absoluteFilePath(pluginFileName));
		plugin = loader.instance();

		/*if (loader.isLoaded())
		{
			pluginInterface *plg = qobject_cast<pluginInterface *>(plugin);
			QMessageBox::information(0, "!!!", plg->getAuthor());
		}*/

		QMessageBox::information(0, "!!!", loader.errorString());
	}

	/*QPluginLoader loader("plugins/libtest_plugin.so");

	if (!loader.load())
	{
		QMessageBox::information(0, "!!!", loader.errorString());
	}*/
}

#include <QPluginLoader>
#include <QMessageBox>
#include <QDir>
#include "ui_cryptMain.h"

class cryptMain : public QMainWindow, private Ui::cryptMain
{
    Q_OBJECT

public:
    cryptMain(QWidget *parent = 0);

private slots:

private:
	QObject *plugin;

	//QPluginLoader loader;

	QDir pluginsDir;

	QString pluginFileName;
};

#include <QApplication>
#include "pluginInterface.h"
#include "cryptMain.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    cryptMain form;
    form.show();

    return app.exec();
}

######################################################################
# Automatically generated by qmake (2.01a) Thu Feb 21 18:17:20 2008
######################################################################

TEMPLATE = app
TARGET = 
DEPENDPATH += .
INCLUDEPATH += .

# Input
HEADERS += cryptMain.h
FORMS += cryptMain.ui
SOURCES += cryptMain.cpp main.cpp

#include <QObject>
#include <QtCore>
#include <QString>

class pluginInterface
{
public:
	virtual ~pluginInterface() {}
	virtual QString getAuthor() = 0;
};

Q_DECLARE_INTERFACE (pluginInterface, "zodiac.pluginInterface/1.0")

######################################################################
# Automatically generated by qmake (2.01a) Wed Feb 27 14:45:38 2008
######################################################################

TEMPLATE = lib
CONFIG += plugin
TARGET = 
DEPENDPATH += .
INCLUDEPATH += .

# Input
HEADERS += test_plugin.h ../pluginInterface.h
SOURCES += test_plugin.cpp

#include "test_plugin.h"
Q_EXPORT_PLUGIN2(testplugin, testPlugin);

#include <QtCore>
#include "../pluginInterface.h"

class testPlugin : public QObject, public pluginInterface
{
	Q_OBJECT
	Q_INTERFACES(pluginInterface)

public:
	QString getAuthor()
	{
		return "zodiac";
	}
};

#include "pluginInterface.h "

int main(int argc, char *argv[])
{
		QApplication app(argc, argv);

		QPluginLoader loader("plugins/debug/testd.dll");
		QObject *plugin = loader.instance();
		if(plugin)
			{
				pluginInterface *plg = qobject_cast<pluginInterface *>(plugin);			
				if(plg)
					QMessageBox::information(0, "!!!", plg->getAuthor());
				else
					QMessageBox::information(0, "error", "qobject_cast fail");
			}
		else
			QMessageBox::information(0, "error", loader.errorString ());

		return 0;