QT實現(xiàn)提示右下角冒泡效果的方法是什么

#ifndef _QTOOLTIPS_
#define _QTOOLTIPS_
#include <QTimer>
#include <QDialog>
#include "ui_QToolTips.h"
 
class QToolTips:public QDialog
{
 Q_OBJECT
 
public:
 QToolTips(QWidget *parent = 0);
 ~QToolTips();
 
 void showMessage(const char* str);
 
private slots:
 void onMove();
 void onStay();-
 void onClose();
 
private:
 Ui::QToolTips ui;
 QTimer * m_pShowTimer;
 QTimer * m_pStayTimer;
 QTimer * m_pCloseTimer;
 QPoint m_point;
 int   m_nDesktopHeight;
 double  m_dTransparent;
 
};
 
#endif

#include "QToolTips.h"
#include <QtWidgets/QApplication>
#include <QDesktopWidget>
 
QToolTips::QToolTips(QWidget *parent /*= 0*/)
 : QDialog(parent)
{
 
 setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
 ui.setupUi(this);
 
 m_nDesktopHeight = QApplication::desktop()->height();
 
 m_dTransparent = 1.0;
 
 m_pShowTimer = new QTimer(this);
 m_pStayTimer = new QTimer(this);
 m_pCloseTimer = new QTimer(this);
 
 connect(m_pShowTimer, SIGNAL(timeout()), this, SLOT(onMove()));
 connect(m_pStayTimer, SIGNAL(timeout()), this, SLOT(onStay()));
 connect(m_pCloseTimer, SIGNAL(timeout()), this, SLOT(onClose()));
 
}
 
 
QToolTips::~QToolTips()
{
 
}
 
void QToolTips::showMessage(const char* str)
{
 ui.m_label->setStyleSheet("background-color:rgb(255,210,200);font:60px;color:blue");
 ui.m_label->setText(str);
 QRect rect = QApplication::desktop()->availableGeometry();
 m_point.setX(rect.width() - width());
 m_point.setY(rect.height() - height());
 move(m_point.x(), m_point.y());
 m_pShowTimer->start(5);
 
 
}
 
void QToolTips::onMove()
{
 m_nDesktopHeight--;
 move(m_point.x(), m_nDesktopHeight);
 if (m_nDesktopHeight <= m_point.y())
 {
 m_pShowTimer->stop();
 m_pStayTimer->start(5000);
 }
 
 
}
 
void QToolTips::onStay()
{
 m_pStayTimer->stop();
 m_pCloseTimer->start(100);
 
}
 
void QToolTips::onClose()
{
 m_dTransparent -= 0.1;
 if (m_dTransparent <= 0.0)
 {
 m_pCloseTimer->stop();
 close();
 }
 else
 {
 setWindowOpacity(m_dTransparent);
 }
 
 
}