1 void CallTrace::closeEvent(QCloseEvent *e) 2 { 3     closeDialog = new CloseDialog; 4     closeDialog->move((QApplication::desktop()->width() - closeDialog->width())/2, 5                       (QApplication::desktop()->height() - closeDialog->height())/2); 6     closeDialog->exec(); 7     if (closeDialog->m_flag)//先判断没有出错 8     { 9         if (closeDialog->m_flag == 3)//窗口不关闭10             {11             e->ignore();12         }13         else if (closeDialog->m_flag == 2)//立即关闭14             {15                 //关闭线程16                 pTaskInstance->m_CDR.StopCdr();17                 emit mysig();　　　　　　　　//发射信号，记录窗口及线程状态18         }19         else if (closeDialog->m_flag == 1)//隐藏到后台20         {21             //什么都不用做22         }23     }24 }

 1 CloseDialog::CloseDialog() 2 { 3     m_flag = 0;//窗口关闭选项的初始化 4     QGroupBox *closeSelection = new QGroupBox(tr("关闭选项")); 5     hide = new QRadioButton(tr("隐藏到后台")); 6     hide->setChecked(true); 7     holdOn = new QRadioButton(tr("立即关闭")); 8  9     QVBoxLayout *vLayout1 = new QVBoxLayout;10     vLayout1->addWidget(hide);11     vLayout1->addWidget(holdOn);12     closeSelection->setLayout(vLayout1);13 14     QHBoxLayout *hLayout1 = new QHBoxLayout;15     okBtn = new QPushButton(tr("确定"));16     cancelBtn = new QPushButton(tr("取消"));17     hLayout1->addStretch();18     hLayout1->addWidget(okBtn);19     hLayout1->addSpacing(10);20     hLayout1->addWidget(cancelBtn);21     hLayout1->addStretch();22 23     QHBoxLayout *hLayout2 = new QHBoxLayout;24     closeCbox = new QCheckBox;25     closeCbox->setText(tr("默认此选项，以后不再提示"));26     hLayout2->addWidget(closeCbox);27 28     QVBoxLayout *mainLayout = new QVBoxLayout;29     mainLayout->addWidget(closeSelection);30     mainLayout->addLayout(hLayout2);31     mainLayout->addLayout(hLayout1);32 33     setLayout(mainLayout);34     setWindowTitle(tr("提示"));35     this->resize(400,200);36 37     connect(okBtn,SIGNAL(clicked()),this,SLOT(ok_PushButton_Clicked()));38     connect(cancelBtn,SIGNAL(clicked()),this,SLOT(cancel_PushButton_Clicked()));39 }

1 //弹出小窗口关闭2 void CloseDialog::closeEvent(QCloseEvent *e)3 {4     if (!m_flag)//若直接关闭对话框，m_flag置35         {6         m_flag = 3;//保持原状态，不关闭7     }8 }

//确定按钮
 1 void CloseDialog::ok_PushButton_Clicked() 2 { 3     if (hide->isChecked()) 4         { 5         m_flag = 1;//隐藏到后台 6     } 7     else if (holdOn->isChecked()) 8         { 9         m_flag = 2;//立即关闭10     }11     this->close();12 }13 14 //取消按钮15 void CloseDialog::cancel_PushButton_Clicked()16 {17     m_flag = 3;//保持原状态，不关闭18     this->close();19 }

//.h文件
 1 class CloseDialog : public QDialog 2 { 3     Q_OBJECT 4 public: 5     CloseDialog(); 6     ~CloseDialog(); 7  8 public: 9     QRadioButton *hide;10     QRadioButton *holdOn;11     QPushButton *okBtn;12     QPushButton *cancelBtn;13     QCheckBox *closeCbox;14     int m_flag;                         //标志，记录隐藏窗口还是关闭 1隐藏到后台，2立即关闭，3不改变，0错误15 16 protected:17     void closeEvent(QCloseEvent *e);//窗口关闭时调用18 public slots:19     void ok_PushButton_Clicked();20     void cancel_PushButton_Clicked();21 };