[英]QObject factory in Qt Plugin(non-creator)
我开始对我的问题非常紧张,我会尽力满足我的需要,希望有人理解。 想象一下,我有一个项目,它生成一个可执行文件和一些插件(运行时加载库)。 该可执行文件是某种守护进程/服务,它在开始时寻找合适的插件。 所以这些插件应该提供一些抽象的通信层。 我查看了Qt Doc,发现QPluginLoader类应该提供.so的接口加载,但接口不能有信号/槽,必须是纯虚拟的。 所以我在考虑将会返回基于QObject的对象的思考...
! 请不要害怕,它只有2个接口和2个实现:)
我的项目布局和内容:
./Daemon/Interfaces/PluginInterface.h
#include <QObject>
#include "PluginInterface.h"
class PluginInterface {
public:
virtual ~PluginInterface() = 0;
virtual ProtocolInterface* getInterface() = 0;
virtual int getPluginId() const = 0;
};
Q_DECLARE_INTERFACE( PluginInterface, "com.porta.protocol.PluginInterface/1.0")
./Daemon/Interfaces/ProtocolInterface.h
#include <QObject>
#include "turnstile.h"
class ProtocolInterface : public QObject {
Q_OBJECT
public:
ProtocolInterface( QObject *parent = 0 ) : QObject( parent ) {}
virtual QWidget* getConfigureGUI() = 0;
virtual void init() = 0;
virtual void start() = 0;
signals:
void someSignal();
};
./Daemon/ProtocolHander.cpp(&h)< - 只是插件加载和一些逻辑
./Daemon.pro
QT += core gui
TARGET = porta_daemon
CONFIG += console
CONFIG -= app_bundle
TEMPLATE = app
SOURCES += main.cpp \
protocolhandler.cpp
HEADERS += protocolhandler.h \
Interfaces/protocolinterface.h \
Interfaces/protocolloader.h \
Interfaces/turnstile.h
./Plugins/Dummy/DummyPluginInterface.h
#include "protocolloader.h"
#include <QObject>
class DummyPluginInterface : public QObject, PluginInterface {
Q_OBJECT
Q_INTERFACES(PluginInterface)
public:
ProtocolInterface* getInterface();
int getPluginId() const;
};
./Plugins/Dummy/DummyPluginInterface.cpp
#include "DummyPluginInterface.h"
#include "DummyProtocolInterface.h"
ProtocolInterface *DummyPluginInterface::getInterface() {
return new DummyProtocolInterface();
}
int DummyPluginInterface::getPluginId() const {
return 1;
}
Q_EXPORT_PLUGIN2(dummyplugin, DummyPluginInterface)
./Plugins/Dummy/DummyProtocolInterface.h
#include "protocolinterface.h"
#include <QObject>
class DummyProtocolInterface : public ProtocolInterface {
public:
void init();
QWidget* getConfigureGUI();
void start();
int getPluginId() { return 1; }
};
./Plugins/Dummy/DummyProtocolInterface.cpp
#include "DummyProtocolInterface.h"
QWidget* DummyProtocolInterface::getConfigureGUI() {
return 0;
}
void DummyProtocolInterface::start() {
}
void DummyProtocolInterface::init() {
emit someSignal(); /// !!! this is important for me
}
./Plugins/Dummy/Dummy.pro
TEMPLATE = lib
CONFIG += plugin
QT += network
INCLUDEPATH += ../../Daemon/Interfaces/
HEADERS += ****
SOURCES += ****
TARGET = *****
DESTDIR = *****
我的问题是,我正在获取链接错误或运行时未解析的符号(主要是来自QObject的一些思考)或我的信号不能通过连接... ProtocolHandler应该是连接信号/插槽的那个..
谁能告诉我如何使这种方法正确? Qt的例子不包括这样的想法..
谢谢!
亚当
所以将ProtocolInterface.h添加到HEADERS + = Plugin.pro文件的部分解决了问题:)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.