slidingwindow.h

#ifndef SLIDINGWINDOW_H  
#define SLIDINGWINDOW_H  
  
#include <QtGui>  
  
class SlidingWindow : public QWidget  
{  
    Q_OBJECT  
  
public:  
    SlidingWindow(QWidget *parent = 0);  
    ~SlidingWindow();  
  
protected:  
    void mousePressEvent ( QMouseEvent * event);  
    void mouseMoveEvent(QMouseEvent *event);  
    void mouseReleaseEvent(QMouseEvent *event);  
    void resizeEvent(QResizeEvent *event);  
    bool eventFilter(QObject *obj, QEvent *event);  
  
private:  
    void setBtnPos();  
    void setBtnIcon();  
  
private slots:  
    void slotClickedBtn();  
    void slotSplitterMoved(int pos, int index);  
  
private:  
    QPoint dragPosition;  
    bool bPressFlag;  
    QSplitter *splitter;  
    QFrame *contentFrame;  
    QFrame *listFrame;  
    QPushButton *pushButton;  
    QIcon leftIcon;  
    QIcon rightIcon;  
};  
  
#endif // SLIDINGWINDOW_H  

slidingwindow.cpp

#include "slidingwindow.h"  
  
SlidingWindow::SlidingWindow(QWidget *parent)  
    : QWidget(parent, Qt::FramelessWindowHint)  
    , bPressFlag(false)  
{  
    resize(660, 460);  
    splitter = new QSplitter(Qt::Horizontal, this);  
    splitter->setHandleWidth(1);  
    splitter->setStyleSheet("QSplitter::handle{background:#FFFFFF}");  
    contentFrame = new QFrame(splitter);  
    contentFrame->setStyleSheet("background:#000000");  
    contentFrame->resize(475, height());  
    contentFrame->setMinimumWidth(405);  
    listFrame = new QFrame(splitter);  
    listFrame->setStyleSheet("background:#323232");  
    listFrame->resize(660 - 475, height());  
    listFrame->setMaximumWidth(660 - 405);  
    connect(splitter, SIGNAL(splitterMoved(int,int)), this, SLOT(slotSplitterMoved(int,int)));  
  
    leftIcon = QIcon(":/left.png");  
    rightIcon = QIcon(":/right.png");  
  
    pushButton = new QPushButton(this);  
    pushButton->setFocusPolicy(Qt::NoFocus);  
    pushButton->hide();  
    pushButton->setFixedSize(13, 42);  
    pushButton->setIconSize(pushButton->size());  
    pushButton->setStyleSheet("border:none;");  
    pushButton->setIcon(rightIcon);  
    pushButton->move(contentFrame->width() - pushButton->width()-2, (contentFrame->height() - pushButton->height())/2);  
    connect(pushButton,SIGNAL(clicked()),this,SLOT(slotClickedBtn()));  
  
    contentFrame->setMouseTracking(true);  
    listFrame->setMouseTracking(true);  
    contentFrame->installEventFilter(this);  
    listFrame->installEventFilter(this);  
}  
  
SlidingWindow::~SlidingWindow()  
{  
  
}  
  
void SlidingWindow::resizeEvent(QResizeEvent *event)  
{  
    splitter->setGeometry(0, 0, width(), height());  
    move((QApplication::desktop()->width() - width())/2,  (QApplication::desktop()->height() - height())/2);  
    QWidget::resizeEvent(event);  
}  
  
bool SlidingWindow::eventFilter(QObject *obj, QEvent *event)  
{  
    if (event->type() == QEvent::MouseMove) {  
        QMouseEvent *mouseMove = static_cast<QMouseEvent*>(event);  
        QRect rect = pushButton->frameGeometry();  
        if (rect.contains(mouseMove->pos())) {  
            pushButton->show();  
        }  
        else {  
            pushButton->hide();  
        }  
    }  
    return QWidget::eventFilter(obj, event);  
}  
  
void SlidingWindow::setBtnPos()  
{  
    pushButton->move(contentFrame->width() - pushButton->width(), (contentFrame->height() - pushButton->height())/2);  
}  
  
void SlidingWindow::setBtnIcon()  
{  
    if (listFrame->width() != 0) {  
        pushButton->setIcon(rightIcon);  
    }  
    else {  
        pushButton->setIcon(leftIcon);  
    }  
}  
  
void SlidingWindow::slotClickedBtn()  
{  
    QList <int> sizeList;  
    sizeList.clear();  
    if (listFrame->width() != 0) {  
        sizeList.append(660);  
        sizeList.append(0);  
    }  
    else {  
        sizeList.append(475);  
        sizeList.append(660 - 475);  
    }  
    splitter->setSizes(sizeList);  
  
    setBtnIcon();  
    setBtnPos();  
    pushButton->hide();  
}  
  
void SlidingWindow::slotSplitterMoved(int pos, int index)  
{  
    Q_UNUSED(pos)  
    Q_UNUSED(index)  
    setBtnIcon();  
    setBtnPos();  
}  
  
void SlidingWindow::mousePressEvent ( QMouseEvent * event)  
{  
    bPressFlag = true;  
    dragPosition = event->pos();  
    QWidget::mousePressEvent(event);  
}  
  
void SlidingWindow::mouseMoveEvent(QMouseEvent *event)  
{  
    if (bPressFlag) {  
        QPoint relaPos(QCursor::pos() - dragPosition);  
        move(relaPos);  
    }  
    QWidget::mouseMoveEvent(event);  
}  
  
void SlidingWindow::mouseReleaseEvent(QMouseEvent *event)  
{  
    bPressFlag = false;  
    QWidget::mouseReleaseEvent(event);  
}  

main.cpp

#include "slidingwindow.h"  
#include <QApplication>  
  
int main(int argc, char *argv[])  
{  
    QApplication a(argc, argv);  
    SlidingWindow w;  
    w.show();  
  
    return a.exec();  
}  

   获取位置坐标可以尝试QPoint realPos(QCursor::pos() - this->pos());，这样不用类型转换。主要设置setMouseTracking(true);才能当鼠标不点击时移动鼠标进入mouseMoveEvent事件函数

参考：

https://www.yuque.com/docs/share/665567ac-1c53-4cf1-ad20-decdd1a629fb