Qt实现鼠标拖拉窗口，并实现模拟鼠标拖拉窗口代码实例

效果解释（不知道他们是怎么往博客上传动图显示程序效果的，我只能苦逼的用文字来描述）：

功能1、鼠标左键按下111这个框之后，在不松掉鼠标左键下移动，这个框会跟着移动。

功能2、鼠标点击Mouse这个按钮之后，那个111框会被模拟鼠标左键按下时移动的效果而被拖动

这个文件需要导入User32.Lib这个库，可以看我上篇博客：

qt模拟鼠标左击下移动

下面全是代码（就不过多解释了，不懂的话评论问我下吧。。。）

form.h

#ifndef FORM_H
#define FORM_H

#include <QWidget>
#include <QTextEdit>
#include <QMouseEvent>
#include <QPoint>
#include <QPushButton>

namespace Ui {
class Form;
}

class Form : public QPushButton
{
    Q_OBJECT

public:
    explicit Form(QPushButton *parent = 0);
    ~Form();
    void mousePressEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
    void mouseMoveEvent(QMouseEvent *e);
    QPoint point;
private:
    //Ui::Form *ui;
signals:
    void toMove(int x,int y);

};

#endif // FORM_H
//LNK2019: 无法解析的外部符号 "public: __cdecl Form::Form(class QObject *)" (??0Form@@QEAA@PEAVQObject@@@Z)，该符号在函数 "public: __cdecl Widget::Widget(class QWidget *)" (??0Widget@@QEAA@PEAVQWidget@@@Z) 中被引用

form.cpp

#include "form.h"
#include "ui_form.h"
#include <QDebug>

Form::Form(QPushButton *parent) :
    QPushButton(parent)
    //ui(new Ui::Form)
{
    //ui->setupUi(this);
    //this->setStyleSheet("background-color:black;");
    this->resize(500,500);
    this->setText("1111");
}

Form::~Form()
{
    //delete ui;
}
void Form::mousePressEvent(QMouseEvent *e)
{
    if(e->button() == Qt::LeftButton){
        qDebug() << e->globalX() << " --------- " << e->globalY() << endl;
        QPoint tmp(e->globalX(),e->globalY());
        point = tmp;
    }
}

void Form::mouseReleaseEvent(QMouseEvent *e)
{

}

void Form::mouseMoveEvent(QMouseEvent *e)
{
    //qDebug() << e->x() << " " << this->y() << endl;
    if(e->buttons() & Qt::LeftButton){
        qDebug() << e->globalX() << " +++++++++ " << e->globalY() << endl;
        QPoint tmp(e->globalX(),e->globalY());
        int x=(tmp.x()-point.x());
        int y=(tmp.y()-point.y());
        point.setX(tmp.x());
        point.setY(tmp.y());
        qDebug() << x << " ***** " << y << endl;
        //this->move(QPoint(x,y));
        emit toMove(x,y);
    }
}

movethread.h

#ifndef MOVETHREAD_H
#define MOVETHREAD_H

#include <QWidget>
#include <QThread>

namespace Ui {
class MoveThread;
}

class MoveThread : public QThread
{
    Q_OBJECT

public:
    explicit MoveThread(QThread *parent = 0);
    ~MoveThread();
    void run();
    void Stop();
    void St();

private:
    //Ui::MoveThread *ui;
    bool condition,st;
};

#endif // MOVETHREAD_H

movethread.cpp

#include "movethread.h"
#include "ui_movethread.h"
#include "Windows.h"
#include "WinUser.h"

MoveThread::MoveThread(QThread *parent) :
    QThread(parent),
    condition(true),
    st(false)
    //ui(new Ui::MoveThread)
{
    //ui->setupUi(this);
}

MoveThread::~MoveThread()
{
    //delete ui;
}

void MoveThread::run()
{
    while(condition)
    {
        if(st){
            mouse_event(MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_LEFTDOWN,0,0,0,0);//原位置按下
                    //Sleep(33);
            mouse_event(MOUSEEVENTF_MOVE,0,150,0,0);//向上移动150
                    //Sleep(33);
            mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);//在移动后的位置释放左键

            mouse_event(MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_LEFTDOWN,0,0,0,0);//原位置按下
                    //Sleep(33);
            for(int i=1;i<=150;++i){
                mouse_event(MOUSEEVENTF_MOVE,0,1,0,0);//向上移动150
                Sleep(1);
            }
                    //Sleep(33);
            mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);//在移动后的位置释放左键
            st=false;
        }
    }
}

void MoveThread::Stop()
{
    condition=false;
}

void MoveThread::St()
{
    st=true;
}

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QMouseEvent>
#include "form.h"
#include "movethread.h"

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();
    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void MouseMove(int x, int y);
    Form *f;

private slots:
    void on_pushButton_clicked();
    void MOVE(int x,int y);
private:
    Ui::Widget *ui;
    MoveThread *moveThread;
};

#endif // WIDGET_H

widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include <QDebug>
#include <QApplication>
#include "Windows.h"
#include "WinUser.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    f = new Form();
    f->move(100,100);
    f->setParent(this);
    f->show();
    connect(f,SIGNAL(toMove(int,int)),this,SLOT(MOVE(int,int)));
    //this->setStyleSheet("background-color:black;");
    moveThread = new MoveThread();
    moveThread->start();
}

void Widget::MOVE(int x,int y)
{
    qDebug() << x << "qweqweqweqwe" << y <<endl;
    f->move(f->x()+x,f->y()+y);
}

Widget::~Widget()
{
    delete ui;
}
void Widget::mousePressEvent(QMouseEvent *event)
{
    qDebug() << "qqq" << endl;
}
void Widget::mouseMoveEvent(QMouseEvent *event)
{
    if(event->button() == Qt::LeftButton)
    qDebug() << event->x() << " " << event->y() << endl;
}
void Widget::mouseReleaseEvent(QMouseEvent *event)
{
    qDebug() << "www" << endl;
}

void Widget::on_pushButton_clicked()
{
//    qDebug() << "111" << endl;
//    QPoint pos;
//    pos.setX(0);
//    pos.setY(0);
//    QMouseEvent *mEvnPress;
//    QMouseEvent *mEvnRelease;
//    mEvnPress = new QMouseEvent(QEvent::MouseButtonPress, pos, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
//    QApplication::sendEvent(f,mEvnPress);
//    for(int i=1;i<10;++i){
//        delete mEvnPress;
//        pos.setX(0+50);
//        pos.setY(0);
//        mEvnPress = new QMouseEvent(QEvent::MouseMove, pos, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
//        QApplication::sendEvent(f,mEvnPress);
//    }
//    mEvnRelease = new QMouseEvent(QEvent::MouseButtonRelease, pos, Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
//    QApplication::sendEvent(f,mEvnRelease);
    //MouseMove(100,100);
    moveThread->St();
}
void Widget::MouseMove(int x, int y)//鼠标移动到指定位置
{
    mouse_event(MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_LEFTDOWN,0,0,0,0);//原位置按下
            //Sleep(33);
    mouse_event(MOUSEEVENTF_MOVE,0,300,0,0);//向上移动150
            //Sleep(33);
    mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);//在移动后的位置释放左键
}
/*
"No Target Architecture"
无法解析的外部符号 __imp_mouse_event，该符号在函数 "public: void __cdecl Widget::MouseMove(int,int)" (?MouseMove@Widget@@QEAAXHH@Z) 中被引用
*/

main.cpp

#include "widget.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    return a.exec();
}

只有Widget.ui文件用了一下，就加了一个按钮