[英]QObject factory in Qt Plugin(non-creator)
我開始對我的問題非常緊張,我會盡力滿足我的需要,希望有人理解。 想象一下,我有一個項目,它生成一個可執行文件和一些插件(運行時加載庫)。 該可執行文件是某種守護進程/服務,它在開始時尋找合適的插件。 所以這些插件應該提供一些抽象的通信層。 我查看了Qt Doc,發現QPluginLoader類應該提供.so的接口加載,但接口不能有信號/槽,必須是純虛擬的。 所以我在考慮將會返回基於QObject的對象的思考...
! 請不要害怕,它只有2個接口和2個實現:)
我的項目布局和內容:
./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)< - 只是插件加載和一些邏輯
./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 = *****
我的問題是,我正在獲取鏈接錯誤或運行時未解析的符號(主要是來自QObject的一些思考)或我的信號不能通過連接... ProtocolHandler應該是連接信號/插槽的那個..
誰能告訴我如何使這種方法正確? Qt的例子不包括這樣的想法..
謝謝!
亞當
所以將ProtocolInterface.h添加到HEADERS + = Plugin.pro文件的部分解決了問題:)
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.