diff --git a/Qss.cpp b/Qss.cpp
index bed9815..251168f 100644
--- a/Qss.cpp
+++ b/Qss.cpp
@@ -269,7 +269,7 @@ QssMainWindow::QssMainWindow(QWidget *parent/* = 0*/, Qt::WindowFlags flags/* =
     vbox->setMargin(1);
     vbox->setSpacing(0);
     vbox->addWidget(this);
-//    installEventFilter(this);
+
 
     mFrameRect = m_frame->geometry();
     m_rcNormal = m_frame->geometry();
@@ -1635,6 +1635,7 @@ QSSProcessBar::QSSProcessBar(QWidget *parent) :
 
     setWindowFlags(Qt::FramelessWindowHint);
     this->setModal(true);
+    mParent = parent;
 }
 
 QSSProcessBar::~QSSProcessBar()
@@ -1642,6 +1643,16 @@ QSSProcessBar::~QSSProcessBar()
     delete ui;
 }
 
+void QSSProcessBar::showEvent(QShowEvent *ev)
+{
+    ui->progressBar->setValue(0);
+    if(nullptr != mParent){
+        this->move(mParent->geometry().width()/2 - this->width()/2,
+                   mParent->geometry().height()/2 - this->height()/2);
+    }
+    QDialog::showEvent(ev);
+}
+
 void QSSProcessBar::on_percent(int percent)
 {
     ui->progressBar->setValue(percent);
diff --git a/Qss.h b/Qss.h
index 5694f43..0242e50 100644
--- a/Qss.h
+++ b/Qss.h
@@ -1,4 +1,4 @@
-
+
 #ifndef QSS_H
 #define QSS_H
 
@@ -423,7 +423,7 @@ class QssMaskWidget : public QWidget
 
 public:
     QssMaskWidget(QWidget *parent = Q_NULLPTR);
-    ~QssMaskWidget();
+    virtual ~QssMaskWidget();
     virtual bool eventFilter(QObject * obj, QEvent * ev);
 
 public:
@@ -468,12 +468,14 @@ class QSSProcessBar : public QDialog
 public:
     explicit QSSProcessBar(QWidget *parent = nullptr);
     ~QSSProcessBar();
+    void showEvent(QShowEvent *) override;
 
 public slots:
     void on_percent(int);
     void on_done_close();
 private:
     Ui::Process *ui;
+    QWidget *mParent;
 };