diff --git a/frame/panel/mainpanelcontrol.cpp b/frame/panel/mainpanelcontrol.cpp
index ab392efc4..257ce0c71 100644
--- a/frame/panel/mainpanelcontrol.cpp
+++ b/frame/panel/mainpanelcontrol.cpp
@@ -55,9 +55,6 @@ MainPanelControl::MainPanelControl(QWidget *parent)
     setAcceptDrops(true);
     setMouseTracking(true);
 
-    connect(this, SIGNAL(displayModeChanged()), this, SLOT(onDisplayModeChanged()));
-    connect(this, SIGNAL(positionChanged()), this, SLOT(onPositionChanged()));
-
     m_appAreaWidget->installEventFilter(this);
     m_appAreaSonWidget->installEventFilter(this);
 }
@@ -108,7 +105,7 @@ void MainPanelControl::setDisplayMode(DisplayMode mode)
     if (mode == m_dislayMode)
         return;
     m_dislayMode = mode;
-    emit displayModeChanged();
+    updateDisplayMode();
 }
 
 void MainPanelControl::updateMainPanelLayout()
@@ -372,7 +369,6 @@ void MainPanelControl::dragLeaveEvent(QDragLeaveEvent *e)
 
         removeAppAreaItem(m_placeholderItem);
         m_placeholderItem->deleteLater();
-        updateMainPanelLayout();
     }
 }
 
@@ -674,12 +670,7 @@ void MainPanelControl::moveAppSonWidget()
     m_appAreaSonWidget->move(rect.x(), rect.y());
 }
 
-void MainPanelControl::onDisplayModeChanged()
-{
-    updateDisplayMode();
-}
-
-void MainPanelControl::onPositionChanged()
+void MainPanelControl::positionChanged()
 {
     updateMainPanelLayout();
 }
diff --git a/frame/panel/mainpanelcontrol.h b/frame/panel/mainpanelcontrol.h
index 36364df57..0b957720c 100644
--- a/frame/panel/mainpanelcontrol.h
+++ b/frame/panel/mainpanelcontrol.h
@@ -55,6 +55,7 @@ public:
     void removePluginAreaItem(QWidget *wdg);
     void setPositonValue(Position position);
     void setDisplayMode(DisplayMode m_displayMode);
+    void positionChanged();
 
     MainPanelDelegate *delegate() const;
     void setDelegate(MainPanelDelegate *delegate);
@@ -62,8 +63,6 @@ public:
 signals:
     void itemMoved(DockItem *sourceItem, DockItem *targetItem);
     void itemAdded(const QString &appDesktop, int idx);
-    void displayModeChanged();
-    void positionChanged();
 
 private:
     void resizeEvent(QResizeEvent *event) override;
@@ -88,8 +87,6 @@ private:
 public slots:
     void insertItem(const int index, DockItem *item);
     void removeItem(DockItem *item);
-    void onDisplayModeChanged();
-    void onPositionChanged();
     void itemUpdated(DockItem *item);
 
 private: