2025年QT插件开发（3）-- 插件之间相互通信

科技前沿 • 2025-02-13 23:25 • 阅读 68

大家好，我是讯享网，很高兴认识大家。

插件的通信通过插件管理器来管理，插件管理器转发插件的消息

首先，改一下接口，增加一个插件间通信的结构体，增加插件发送消息和接收消息的纯虚函数供插件实现

#ifndef PLUGININTERFACE_H #define PLUGININTERFACE_H #include <QtPlugin> #include <QJsonObject> struct PluginMetaData { QString from;//消息来源 QString dest;//消息目的地 QString msg; QObject *object = nullptr; QJsonObject info = QJsonObject(); }; Q_DECLARE_METATYPE(PluginMetaData);//确保类型可以通过信号槽传递 class PluginInterface { public: virtual ~PluginInterface() {} virtual QString get_name() const = 0; virtual QString show_text() const = 0; virtual void recMsgfromManager(PluginMetaData) = 0;//接收到来自创建管理器的消息 virtual void sendMsg2Manager(PluginMetaData) = 0;//给插件管理器发消息 }; Q_DECLARE_INTERFACE(PluginInterface,"org.galaxyworld.plugins.PluginInterface/1.0") #endif // PLUGININTERFACE_H

讯享网

修改插件01如下，实现插件接口的信息接收函数，将插件接口的发送函数实现为信号

讯享网#ifndef PLUGIN01_H #define PLUGIN01_H #include "Plugin01_global.h" #include <QObject> #include "PluginInterface.h" #include <QDebug> class PLUGIN01_EXPORT Plugin01 : public QObject,public PluginInterface { Q_OBJECT Q_INTERFACES(PluginInterface) Q_PLUGIN_METADATA(IID "my_plugin01") public: Plugin01(); QString get_name() const { return "Plugin01"; } QString show_text() const { return "this is Plugin01"; } virtual void recMsgfromManager(PluginMetaData metaData) Q_DECL_OVERRIDE { qDebug()<<"插件Plugin01接收到消息："<< metaData.msg; } signals: void sendMsg2Manager(PluginMetaData) Q_DECL_OVERRIDE; }; #endif // PLUGIN01_H

然后是插件02，几乎一样的代码

#ifndef PLUGIN02_H #define PLUGIN02_H #include "Plugin02_global.h" #include <QObject> #include "PluginInterface.h" #include <QDebug> class PLUGIN02_EXPORT Plugin02 : public QObject,public PluginInterface { Q_OBJECT Q_INTERFACES(PluginInterface) Q_PLUGIN_METADATA(IID "my_plugin02") public: Plugin02(); QString get_name() const { return "Plugin02"; } QString show_text() const { return "this is Plugin02"; } virtual void recMsgfromManager(PluginMetaData metaData) Q_DECL_OVERRIDE { qDebug()<<"插件Plugin02接收到消息："<< metaData.msg; } signals: void sendMsg2Manager(PluginMetaData) Q_DECL_OVERRIDE; }; #endif // PLUGIN02_H

插件管理器做如下修改：

讯享网