#ifndef CONTROL_H

#define CONTROL_H

#include <QWidget>

namespace Ui {

class Control;

}

class Control : public QWidget

{

    Q_OBJECT

public:

    explicit Control(QWidget *parent = );

    ~Control();

    int A1X,A1Y;

    int A2X,A2Y;

    int pressX,pressY;

    int curentX,curentY;

protected:

    void paintEvent(QPaintEvent *event);

    void mouseMoveEvent(QMouseEvent *event);

    void mousePressEvent(QMouseEvent *event);

private:

    Ui::Control *ui;

};

#endif // CONTROL_H

#include "control.h"

#include "ui_control.h"

#include <QDebug>

#include <QMouseEvent>

Control::Control(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Control)

{

    ui->setupUi(this);

    A2X = this->pos().x();

    A2Y = this->pos().y();

}

Control::~Control()

{

    delete ui;

}

void Control::paintEvent(QPaintEvent *event)

{

#if 1

    QPalette palette(this->palette());

    palette.setColor(QPalette::Background, Qt::black);

    this->setAutoFillBackground(true);

    this->setPalette(palette);

#endif

    if(A2X== && A2Y==)

    {

        return;

    }

    this->move(A2X,A2Y);

}

void Control::mouseMoveEvent(QMouseEvent *event)

{

    if (event->buttons() == Qt::LeftButton) // 这个if判断只是为了保证是按压鼠标左键移动产生窗体拖动效果

    {

#if 0

        curentX = event->x();//鼠标点相对当前widget的位置

        curentY = event->y();

#endif

        curentX = event->globalX();//鼠标点相对整个显示器的位置

        curentY = event->globalY();

        A2X = A1X+curentX-pressX;

        A2Y = A1Y+curentY-pressY;

#if 0

        qDebug()<< "mouseMoveEvent:" << curentX << curentY;

        qDebug()<< "A2XY:" << A2X << A2Y;

#endif

        update();

    }

}

void Control::mousePressEvent(QMouseEvent *event)

{

    pressX = event->globalX();//鼠标点相对整个显示器的位置

    pressY = event->globalY();

    A1X = this->x();//widget左上角相对程序的位置

    A1Y = this->y();

#if 0

    int a = event->x();//鼠标点相对当前widget的位置

    int b = event->y();

    int c = this->geometry().x();//widget左上角相对程序的位置

    int d = this->geometry().y();

    qDebug()<< "mousePressEvent:" << pressX << pressY;

    qDebug()<< "A1XY:" << A1X << A1Y;

    qDebug()<< "A1xy:" << A1X << A1Y;

    qDebug()<< "ab:" << a << b;

    qDebug()<< "cd:" << c << d;

#endif

}