Qt for android手机屏幕当鼠标用

由于无线鼠标忘记带回家了，想躺在床上看电视（电视机屏幕当显示器）怎么办呢?HOHO，我们的手机屏幕本来就是个触摸板，嘿嘿，那就用手机屏幕当鼠标好了。
大致的思路就是电脑和手机用Tcp通信，毕竟是都连着路由器的。主要用到的模块就是QTcpServer,QTcpSocket.

#include <QObject>
#include  <QSystemTrayIcon>
class Widget;
class QTcpServer;
class QTcpSocket;

class controller : public QObject
{
    Q_OBJECT
public:
    explicit controller(QObject *parent = 0);
    typedef enum{mouseMove,mouseSingleClick,mouseDoubleClick,mouseRightClick} mouseAction;
    ~controller();

private:
    QTcpServer* tcpserver;
    QTcpSocket* clientSocket;
    quint16 blockSize;
    Widget* widget;
    QSystemTrayIcon* sysIcon;

private:
    void TranslateMessage();

public slots:
    void onConnected();
    void onReadyRead();
    void onDisConnected();
    void onSysIconActRe(QSystemTrayIcon::ActivationReason reason);

#include "controller.h"
#include <QTcpSocket>
#include <QTcpServer>
#include <QDataStream>
#include <windows.h>
#include "widget.h"
#include <QHostAddress>

controller::controller(QObject *parent) : QObject(parent)
{
    tcpserver = new QTcpServer(this);
    widget = new Widget;
    widget->show();
    sysIcon = new QSystemTrayIcon(this);
    sysIcon->setIcon(QIcon(":/computer_16px.ico"));
    sysIcon->hide();
    sysIcon->setToolTip("工作中");

//    installEventFilter(sysIcon);

    tcpserver->listen(QHostAddress::Any,15333);  //监听15333端口
    blockSize = 0;
    connect(tcpserver,SIGNAL(newConnection()),SLOT(onConnected()));
    connect(widget,SIGNAL(sg_hide()),sysIcon,SLOT(show()));
    connect(sysIcon,SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
            SLOT(onSysIconActRe(QSystemTrayIcon::ActivationReason)));


}
void controller::onReadyRead()
{
    QDataStream in(clientSocket);
    in.setVersion(QDataStream::Qt_5_8);
    while(clientSocket->bytesAvailable()>=sizeof(quint16)){
            if(blockSize==0) in>>blockSize;
            if(clientSocket->bytesAvailable()<blockSize) break;
            TranslateMessage();
          //  widget->appendLog("收到消息");
            blockSize=0;
    }
}

void controller::TranslateMessage()
{
  QDataStream in(clientSocket);
  in.setVersion(QDataStream::Qt_5_8);
  qint16 actionType;
  in>>actionType;
//  DWORD dx,dy;
  int px,py;

  switch(actionType){
  case mouseMove:
      in>>px>>py;
//      dx = px*GetSystemMetrics(SM_CXSCREEN);
//      dy = py*GetSystemMetrics(SM_CYSCREEN);
      mouse_event(MOUSEEVENTF_MOVE,px,py,0,0);
//      qDebug()<<dx<<dy;
      break;
  case mouseSingleClick:
      mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);
      mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);
      break;
  case mouseDoubleClick:
      mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);
      mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);
      mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);
      break;
  case mouseRightClick:
      mouse_event(MOUSEEVENTF_RIGHTDOWN,0,0,0,0);
      mouse_event(MOUSEEVENTF_RIGHTUP,0,0,0,0);
      break;
  }
}
void controller::onConnected()
{
    clientSocket = tcpserver->nextPendingConnection();
    connect(clientSocket,SIGNAL(readyRead()),SLOT(onReadyRead()));
    connect(clientSocket,SIGNAL(disconnected()),SLOT(onDisConnected()));

    widget->appendLog("建立连接！");
    widget->appendLog("客户IP:"+clientSocket->peerAddress().toString());
    widget->appendLog("客户名:"+clientSocket->peerName());

}
void controller::onDisConnected()
{
   widget->appendLog("断开连接!");
   clientSocket->deleteLater();
}

controller::~controller()
{
    widget->deleteLater();
}

void controller::onSysIconActRe(QSystemTrayIcon::ActivationReason reason)
{
   if(reason == QSystemTrayIcon::DoubleClick){
       widget->show();
       sysIcon->hide();
   }
}

这是PC端的主要代码 ， 界面用的是之前写的模板。
下面是安卓端的，就更简单了，主要就是一个触摸区域和鼠标左右键。

#include <QDialog>
class QTcpSocket;
class QTimer;

namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog(QWidget *parent = 0);
    ~Dialog();
    enum{mouseMove,mouseSingleClick,mouseDoubleClick,mouseRightClick};
private:
    Ui::Dialog *ui;
    QTcpSocket* tcpSocket;
    QPoint  move_pre_position;
    QTimer* clickTimer;


public slots:
    void onBtn_connectClicked();
    void onBtn_disconnectClicked();
    void onClick_TimerRunout();
    void onConnected();
    void onDisconnected();
    void onBtn_LeftClicked();
    void onBtn_RightClicked();

protected:
    void mouseMoveEvent(QMouseEvent*);
    void mousePressEvent(QMouseEvent*);

};

#include "dialog.h"
#include "ui_dialog.h"
#include <QTcpSocket>
#include <QHostAddress>
#include <QMouseEvent>
#include <QDataStream>
#include <QTimer>

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
    showFullScreen();
    tcpSocket = new QTcpSocket(this);
    tcpSocket->bind(ui->lineEdit_port->text().toInt());
    connect(ui->btn_connect,SIGNAL(clicked(bool)),SLOT(onBtn_connectClicked()));
    clickTimer = new QTimer(this);
    clickTimer->setInterval(100);
    clickTimer->setSingleShot(true);
    connect(clickTimer,SIGNAL(timeout()),SLOT(onClick_TimerRunout()));
    connect(tcpSocket,SIGNAL(connected()),SLOT(onConnected()));
    connect(tcpSocket,SIGNAL(disconnected()),SLOT(onDisconnected()));
    connect(ui->btn_disconnect,SIGNAL(clicked(bool)),SLOT(onBtn_disconnectClicked()));
    connect(ui->Btn_Left,SIGNAL(clicked(bool)),SLOT(onBtn_LeftClicked()));
    connect(ui->Btn_Right,SIGNAL(clicked(bool)),SLOT(onBtn_RightClicked()));


}

Dialog::~Dialog()
{
    delete ui;
}


void Dialog::onBtn_connectClicked()
{
     tcpSocket->connectToHost(QHostAddress(ui->lineEdit_ip->text()),ui->lineEdit_port->text().toInt());

}
void Dialog::onBtn_disconnectClicked()
{
    tcpSocket->disconnectFromHost();
}

void Dialog::mouseMoveEvent(QMouseEvent* event)
{
    if(tcpSocket->state() == QAbstractSocket::ConnectedState){
        QPoint movePos = event->pos() - move_pre_position;
        int move_x,move_y;
        move_x = movePos.x();
        move_y = movePos.y();
        QByteArray  data;
        QDataStream out(&data,QIODevice::WriteOnly);
        out.setVersion(QDataStream::Qt_5_8);
        out<<quint16(0)<<(qint16)mouseMove<<move_x<<move_y;
        out.device()->seek(0);
        out<<(quint16)(data.size()-sizeof(quint16));
        tcpSocket->write(data);
        move_pre_position = event->pos();
//        ui->textBrowser->append(QVariant(move_x).toString()+QVariant(move_y).toString());

    }


}
void Dialog::mousePressEvent(QMouseEvent *event)
{
    move_pre_position = event->pos();  //记录当前位置

}

void Dialog::onClick_TimerRunout()
{
    QByteArray  data;
    QDataStream out(&data,QIODevice::WriteOnly);
    out.setVersion(QDataStream::Qt_5_8);
    out<<quint16(0)<<(qint16)mouseSingleClick;
    out.device()->seek(0);
    out<<(quint16)(data.size()-sizeof(quint16));
    tcpSocket->write(data);
}

void Dialog::onConnected()
{
    ui->textBrowser->append("连接电脑成功!");
    ui->textBrowser->append("电脑名:"+tcpSocket->peerName());

}

void Dialog::onDisconnected()
{
    ui->textBrowser->append("已断开连接");
}
void Dialog::onBtn_LeftClicked()
{
    if(tcpSocket->state() == QAbstractSocket::ConnectedState){
        QByteArray  data;
        QDataStream out(&data,QIODevice::WriteOnly);
        out.setVersion(QDataStream::Qt_5_8);
        if(clickTimer->isActive()){
            out<<quint16(0)<<(qint16)mouseDoubleClick;
            clickTimer->stop();
            out.device()->seek(0);
            out<<(quint16)(data.size()-sizeof(quint16));
            tcpSocket->write(data);
        }
        else{
            clickTimer->start();    //双击单击判断
        }

    }
}
void Dialog::onBtn_RightClicked()
{
    if(tcpSocket->state() == QAbstractSocket::ConnectedState){
        QByteArray  data;
        QDataStream out(&data,QIODevice::WriteOnly);
        out.setVersion(QDataStream::Qt_5_8);
        out<<quint16(0)<<(qint16)mouseRightClick;
        clickTimer->stop();
        out.device()->seek(0);
        out<<(quint16)(data.size()-sizeof(quint16));
        tcpSocket->write(data);


    }
}

由于之前写过一个仿QQ的聊天程序（也就基本的聊天功能啦），这次几乎没碰到问题。主要会发生的问题就是TcpSocket的读写，可以参考上面的onReadyRead函数。（因为Tcp可能一下接到几条消息，会粘连所以要注意）。还有就是我不知道Qt有没有自带的函数可以实现任意区域的鼠标事件，我用的是windows的函数, mouse_event.
下面贴下运行效果啦：