Qt实现进程界面之间的鼠标焦点切换

/*****************************************************
 Author: 张志浩
 Mail: 791745123@qq.com
 Time: 2019-1-5
 Function:
 通用变量、宏定义头文件
 DESTPORT : 目标主机端口
 SENDERTYPE : 发送者类型
 MSGTYPE ： 消息类型
 Version: v 1.0
*****************************************************/
 
#pragma once
 
typedef enum
{
 PORT_MAINDLG = 8000,
 PORT_COMPASS,
 PORT_CHATLIST
}DESTPORT;
 
typedef enum
{
 PROCESS_NONE = 100,
 PROCESS_MAINDLG,
 PROCESS_COMPASS,
 PROCESS_CHATLIST
}SENDERTYPE;
 
typedef enum
{
 MSG_NONE = 10,
 MSG_CHANGEMOUSEPOS
}MSGTYPE;

/*****************************************************
 Author: 张志浩
 Mail: 791745123@qq.com
 Time: 2019-1-5
 Function:
 报文基类
 Version: v 1.0
*****************************************************/
#pragma once
#include "commonType.h"
#include <memory>
 
#define BUFF_LENGTH 128
 
class CInfoBase
{
public:
 CInfoBase():infoType(0), senderType(0)
 {
 memset(addMsg, 0, BUFF_LENGTH);
 }
 
 bool InputAddMsg(const char* buff, int length)
 {
 if (length < BUFF_LENGTH && length > 0)
 {
 memcpy(addMsg, buff, length);
 return true;
 }
 
 return false;
 }
public:
 //消息类型
 int infoType;
 //发送者
 int senderType;
 //附加消息
 char addMsg[BUFF_LENGTH];
};

//获取自身窗口句柄并置前
HWND hwnd = ::FindWindow(NULL, L"compass");
::SetForegroundWindow(hwnd);
 
//获取置前窗口句柄(该步骤可省略，直接用上一步获得的句柄)
HWND hForeWnd = ::GetForegroundWindow();
//获取当前工作线程ID
DWORD dcurid = ::GetCurrentThreadId();
//获取置前窗口的线程ID
DWORD dfoid = ::GetWindowThreadProcessId(hForeWnd, NULL);
 
//依附
::AttachThreadInput(dcurid, dfoid, TRUE); 
 
//设置鼠标位置
QRect rect = this->geometry();
SetCursorPos(rect.left() + 200, rect.top() + 200);

void MainDlg::keyPressEvent(QKeyEvent * event)
{
 switch(event->key())
 {
 case Qt::Key_J:
 {
 CInfoBase m_sendMsg;
 m_sendMsg.infoType = MSG_CHANGEMOUSEPOS;
 m_sendMsg.senderType = PROCESS_MAINDLG;
 
 m_myudp.SendData((char*)&m_sendMsg, sizeof(m_sendMsg), PORT_COMPASS, "127.0.0.1");
 break;
 }
 default:
 {
 
 }
 }
}

void CUdpMsgBase::DataHanding(const char* data)
{
 int msgType = MSG_NONE;
 ::memcpy(&msgType, data, sizeof(int));
 
 if (msgType == MSG_NONE)
 {
 
 }
 
 if (msgType == MSG_CHANGEMOUSEPOS)
 {
 emit changepos();
 }
 
 return;
 
}

void MainDlg::changePos()
{
 HWND hwnd = ::FindWindow(NULL, L"MainDlg");
 ::SetForegroundWindow(hwnd);
 
 
 HWND hForeWnd = ::GetForegroundWindow();
 
 DWORD dcurid = ::GetCurrentThreadId();
 DWORD dfoid = ::GetWindowThreadProcessId(hForeWnd, NULL);
 
 ::AttachThreadInput(dcurid, dfoid, TRUE); 
 
 QRect rect = this->geometry();
 SetCursorPos(rect.left() + 200, rect.top() + 200);
}