diff --git a/frame/item/components/containerwidget.cpp b/frame/item/components/containerwidget.cpp
index f3fb11ba4..b2f4f401d 100644
--- a/frame/item/components/containerwidget.cpp
+++ b/frame/item/components/containerwidget.cpp
@@ -11,13 +11,13 @@
 ContainerWidget::ContainerWidget(QWidget *parent)
     : QWidget(parent),
 
-      m_centeralLayout(new QHBoxLayout)
+      m_centralLayout(new QHBoxLayout)
 {
-    m_centeralLayout->addStretch();
-    m_centeralLayout->setSpacing(0);
-    m_centeralLayout->setMargin(0);
+    m_centralLayout->addStretch();
+    m_centralLayout->setSpacing(0);
+    m_centralLayout->setMargin(0);
 
-    setLayout(m_centeralLayout);
+    setLayout(m_centralLayout);
     setFixedHeight(ITEM_HEIGHT);
     setFixedWidth(ITEM_WIDTH);
     setAcceptDrops(true);
@@ -27,7 +27,7 @@ void ContainerWidget::addWidget(QWidget * const w)
 {
     w->setParent(this);
     w->setFixedSize(ITEM_WIDTH, ITEM_HEIGHT);
-    m_centeralLayout->addWidget(w);
+    m_centralLayout->addWidget(w);
     m_itemList.append(w);
 
     setFixedWidth(ITEM_WIDTH * std::max(1, m_itemList.size()));
@@ -35,7 +35,7 @@ void ContainerWidget::addWidget(QWidget * const w)
 
 void ContainerWidget::removeWidget(QWidget * const w)
 {
-    m_centeralLayout->removeWidget(w);
+    m_centralLayout->removeWidget(w);
     m_itemList.removeOne(w);
 
     setFixedWidth(ITEM_WIDTH * std::max(1, m_itemList.size()));
diff --git a/frame/item/components/containerwidget.h b/frame/item/components/containerwidget.h
index a35a34b67..e21698f6b 100644
--- a/frame/item/components/containerwidget.h
+++ b/frame/item/components/containerwidget.h
@@ -22,7 +22,7 @@ protected:
     void dragEnterEvent(QDragEnterEvent *e);
 
 private:
-    QHBoxLayout *m_centeralLayout;
+    QHBoxLayout *m_centralLayout;
 
     QList<QWidget *> m_itemList;
 };
diff --git a/frame/item/pluginsitem.cpp b/frame/item/pluginsitem.cpp
index a407b773a..b3a3b27b0 100644
--- a/frame/item/pluginsitem.cpp
+++ b/frame/item/pluginsitem.cpp
@@ -17,19 +17,19 @@ QPoint PluginsItem::MousePressPoint = QPoint();
 PluginsItem::PluginsItem(PluginsItemInterface* const pluginInter, const QString &itemKey, QWidget *parent)
     : DockItem(parent),
       m_pluginInter(pluginInter),
-      m_centeralWidget(m_pluginInter->itemWidget(itemKey)),
+      m_centralWidget(m_pluginInter->itemWidget(itemKey)),
       m_itemKey(itemKey),
       m_draging(false)
 {
-    Q_ASSERT(m_centeralWidget);
+    Q_ASSERT(m_centralWidget);
 
     QBoxLayout *hLayout = new QHBoxLayout;
-    hLayout->addWidget(m_centeralWidget);
+    hLayout->addWidget(m_centralWidget);
     hLayout->setSpacing(0);
     hLayout->setMargin(0);
 
-    m_centeralWidget->installEventFilter(this);
-    m_centeralWidget->setVisible(true);
+    m_centralWidget->installEventFilter(this);
+    m_centralWidget->setVisible(true);
 
     setLayout(hLayout);
     setAccessibleName(pluginInter->pluginName() + "-" + m_itemKey);
@@ -131,7 +131,7 @@ void PluginsItem::paintEvent(QPaintEvent *e)
 bool PluginsItem::eventFilter(QObject *o, QEvent *e)
 {
     if (m_draging)
-        if (o == m_centeralWidget && e->type() == QEvent::Paint)
+        if (o == m_centralWidget && e->type() == QEvent::Paint)
             return true;
 
     return DockItem::eventFilter(o, e);
diff --git a/frame/item/pluginsitem.h b/frame/item/pluginsitem.h
index e73dea5a1..766572ff8 100644
--- a/frame/item/pluginsitem.h
+++ b/frame/item/pluginsitem.h
@@ -44,7 +44,7 @@ private:
 
 private:
     PluginsItemInterface * const m_pluginInter;
-    QWidget *m_centeralWidget;
+    QWidget *m_centralWidget;
     const QString m_itemKey;
     bool m_draging;
 
diff --git a/plugins/datetime/datetimeplugin.cpp b/plugins/datetime/datetimeplugin.cpp
index bf0b0884b..86316e22c 100644
--- a/plugins/datetime/datetimeplugin.cpp
+++ b/plugins/datetime/datetimeplugin.cpp
@@ -16,16 +16,16 @@ DatetimePlugin::DatetimePlugin(QObject *parent)
     m_refershTimer->setInterval(1000);
     m_refershTimer->start();
 
-    m_centeralWidget = new DatetimeWidget;
+    m_centralWidget = new DatetimeWidget;
 
-    connect(m_centeralWidget, &DatetimeWidget::requestContextMenu, [this] {m_proxyInter->requestContextMenu(this, QString());});
+    connect(m_centralWidget, &DatetimeWidget::requestContextMenu, [this] {m_proxyInter->requestContextMenu(this, QString());});
 
     connect(m_refershTimer, &QTimer::timeout, this, &DatetimePlugin::updateCurrentTimeString);
 }
 
 DatetimePlugin::~DatetimePlugin()
 {
-    delete m_centeralWidget;
+    delete m_centralWidget;
     delete m_dateTipsLabel;
 }
 
@@ -51,7 +51,7 @@ QWidget *DatetimePlugin::itemWidget(const QString &itemKey)
 {
     Q_UNUSED(itemKey);
 
-    return m_centeralWidget;
+    return m_centralWidget;
 }
 
 QWidget *DatetimePlugin::itemTipsWidget(const QString &itemKey)
@@ -110,5 +110,5 @@ void DatetimePlugin::updateCurrentTimeString()
         return;
 
     m_currentTimeString = currentString;
-    m_centeralWidget->update();
+    m_centralWidget->update();
 }
diff --git a/plugins/datetime/datetimeplugin.h b/plugins/datetime/datetimeplugin.h
index f9b804cb7..d18aa51e4 100644
--- a/plugins/datetime/datetimeplugin.h
+++ b/plugins/datetime/datetimeplugin.h
@@ -34,7 +34,7 @@ private slots:
     void updateCurrentTimeString();
 
 private:
-    DatetimeWidget *m_centeralWidget;
+    DatetimeWidget *m_centralWidget;
     QLabel *m_dateTipsLabel;
 
     QTimer *m_refershTimer;
diff --git a/plugins/disk-mount/diskcontrolitem.cpp b/plugins/disk-mount/diskcontrolitem.cpp
index ddd9b9462..e4ab1b9bf 100644
--- a/plugins/disk-mount/diskcontrolitem.cpp
+++ b/plugins/disk-mount/diskcontrolitem.cpp
@@ -58,13 +58,13 @@ DiskControlItem::DiskControlItem(const DiskInfo &info, QWidget *parent)
     progressLayout->setSpacing(0);
     progressLayout->setContentsMargins(10, 0, 0, 5);
 
-    QHBoxLayout *centeralLayout = new QHBoxLayout;
-    centeralLayout->addWidget(m_diskIcon);
-    centeralLayout->addLayout(progressLayout);
-    centeralLayout->setSpacing(0);
-    centeralLayout->setContentsMargins(0, 0, 5, 0);
+    QHBoxLayout *centralLayout = new QHBoxLayout;
+    centralLayout->addWidget(m_diskIcon);
+    centralLayout->addLayout(progressLayout);
+    centralLayout->setSpacing(0);
+    centralLayout->setContentsMargins(0, 0, 5, 0);
 
-    setLayout(centeralLayout);
+    setLayout(centralLayout);
     setObjectName("DiskItem");
     setStyleSheet("QFrame #DiskItem:hover {"
                   "background-color:rgba(255, 255, 255, .1);"
diff --git a/plugins/disk-mount/diskcontrolwidget.cpp b/plugins/disk-mount/diskcontrolwidget.cpp
index 926baed2b..c589aea36 100644
--- a/plugins/disk-mount/diskcontrolwidget.cpp
+++ b/plugins/disk-mount/diskcontrolwidget.cpp
@@ -6,15 +6,15 @@
 DiskControlWidget::DiskControlWidget(QWidget *parent)
     : QScrollArea(parent),
 
-      m_centeralLayout(new QVBoxLayout),
-      m_centeralWidget(new QWidget),
+      m_centralLayout(new QVBoxLayout),
+      m_centralWidget(new QWidget),
 
       m_diskInter(new DBusDiskMount(this))
 {
-    m_centeralWidget->setLayout(m_centeralLayout);
-    m_centeralWidget->setFixedWidth(WIDTH);
+    m_centralWidget->setLayout(m_centralLayout);
+    m_centralWidget->setFixedWidth(WIDTH);
 
-    setWidget(m_centeralWidget);
+    setWidget(m_centralWidget);
     setFixedWidth(WIDTH);
     setFrameStyle(QFrame::NoFrame);
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
@@ -37,7 +37,7 @@ void DiskControlWidget::diskListChanged()
 {
     DiskInfoList diskList = m_diskInter->diskList();
 
-    while (QLayoutItem *item = m_centeralLayout->takeAt(0))
+    while (QLayoutItem *item = m_centralLayout->takeAt(0))
     {
         delete item->widget();
         delete item;
@@ -55,7 +55,7 @@ void DiskControlWidget::diskListChanged()
 
         connect(item, &DiskControlItem::requestUnmount, this, &DiskControlWidget::unmountDisk);
 
-        m_centeralLayout->addWidget(item);
+        m_centralLayout->addWidget(item);
         m_diskInfoList.append(info);
     }
 
@@ -64,7 +64,7 @@ void DiskControlWidget::diskListChanged()
     const int contentHeight = mountedCount * 70;
     const int maxHeight = std::min(contentHeight, 70 * 6);
 
-    m_centeralWidget->setFixedHeight(contentHeight);
+    m_centralWidget->setFixedHeight(contentHeight);
     setFixedHeight(maxHeight);
 }
 
diff --git a/plugins/disk-mount/diskcontrolwidget.h b/plugins/disk-mount/diskcontrolwidget.h
index 5775b58dd..9de7b0b10 100644
--- a/plugins/disk-mount/diskcontrolwidget.h
+++ b/plugins/disk-mount/diskcontrolwidget.h
@@ -24,8 +24,8 @@ private slots:
     void unmountFinished(const QString &uuid, const QString &info);
 
 private:
-    QVBoxLayout *m_centeralLayout;
-    QWidget *m_centeralWidget;
+    QVBoxLayout *m_centralLayout;
+    QWidget *m_centralWidget;
     DBusDiskMount *m_diskInter;
 
     DiskInfoList m_diskInfoList;
diff --git a/plugins/network/item/applet/accesspointwidget.cpp b/plugins/network/item/applet/accesspointwidget.cpp
index b9fee966f..01a652ce3 100644
--- a/plugins/network/item/applet/accesspointwidget.cpp
+++ b/plugins/network/item/applet/accesspointwidget.cpp
@@ -54,13 +54,13 @@ AccessPointWidget::AccessPointWidget(const AccessPoint &ap)
     infoLayout->setSpacing(0);
     infoLayout->setContentsMargins(15, 0, 0, 0);
 
-    QVBoxLayout *centeralLayout = new QVBoxLayout;
-    centeralLayout->addLayout(infoLayout);
-    centeralLayout->setSpacing(0);
-    centeralLayout->setMargin(0);
+    QVBoxLayout *centralLayout = new QVBoxLayout;
+    centralLayout->addLayout(infoLayout);
+    centralLayout->setSpacing(0);
+    centralLayout->setMargin(0);
 
     setStrengthIcon(ap.strength());
-    setLayout(centeralLayout);
+    setLayout(centralLayout);
     setStyleSheet("AccessPointWidget #Ssid {"
                   "color:white;"
                   "background-color:transparent;"
diff --git a/plugins/network/item/applet/devicecontrolwidget.cpp b/plugins/network/item/applet/devicecontrolwidget.cpp
index 4c7748a29..ad80725c3 100644
--- a/plugins/network/item/applet/devicecontrolwidget.cpp
+++ b/plugins/network/item/applet/devicecontrolwidget.cpp
@@ -25,15 +25,15 @@ DeviceControlWidget::DeviceControlWidget(QWidget *parent)
 //    m_seperator->setFixedHeight(1);
 //    m_seperator->setColor(Qt::black);
 
-    QVBoxLayout *centeralLayout = new QVBoxLayout;
-    centeralLayout->addStretch();
-    centeralLayout->addLayout(infoLayout);
-    centeralLayout->addStretch();
-//    centeralLayout->addWidget(m_seperator);
-    centeralLayout->setMargin(0);
-    centeralLayout->setSpacing(0);
+    QVBoxLayout *centralLayout = new QVBoxLayout;
+    centralLayout->addStretch();
+    centralLayout->addLayout(infoLayout);
+    centralLayout->addStretch();
+//    centralLayout->addWidget(m_seperator);
+    centralLayout->setMargin(0);
+    centralLayout->setSpacing(0);
 
-    setLayout(centeralLayout);
+    setLayout(centralLayout);
     setFixedHeight(30);
 
     connect(m_switchBtn, &DSwitchButton::checkedChanged, this, &DeviceControlWidget::deviceEnableChanged);
diff --git a/plugins/network/item/applet/wirelessapplet.cpp b/plugins/network/item/applet/wirelessapplet.cpp
index 0193c989e..b8b3b55df 100644
--- a/plugins/network/item/applet/wirelessapplet.cpp
+++ b/plugins/network/item/applet/wirelessapplet.cpp
@@ -25,8 +25,8 @@ WirelessList::WirelessList(const QSet<NetworkDevice>::const_iterator &deviceIter
       m_pwdDialog(new DInputDialog(nullptr)),
       m_autoConnBox(new DCheckBox),
 
-      m_centeralLayout(new QVBoxLayout),
-      m_centeralWidget(new QWidget),
+      m_centralLayout(new QVBoxLayout),
+      m_centralWidget(new QWidget),
       m_controlPanel(new DeviceControlWidget),
       m_networkInter(new DBusNetwork(this))
 {
@@ -45,14 +45,14 @@ WirelessList::WirelessList(const QSet<NetworkDevice>::const_iterator &deviceIter
     m_updateAPTimer->setSingleShot(true);
     m_updateAPTimer->setInterval(100);
 
-    m_centeralWidget->setFixedWidth(WIDTH);
-    m_centeralWidget->setLayout(m_centeralLayout);
+    m_centralWidget->setFixedWidth(WIDTH);
+    m_centralWidget->setLayout(m_centralLayout);
 
-//    m_centeralLayout->addWidget(m_controlPanel);
-    m_centeralLayout->setSpacing(0);
-    m_centeralLayout->setMargin(0);
+//    m_centralLayout->addWidget(m_controlPanel);
+    m_centralLayout->setSpacing(0);
+    m_centralLayout->setMargin(0);
 
-    setWidget(m_centeralWidget);
+    setWidget(m_centralWidget);
     setFrameStyle(QFrame::NoFrame);
     setFixedWidth(300);
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
@@ -204,7 +204,7 @@ void WirelessList::updateAPList()
     Q_ASSERT(sender() == m_updateAPTimer);
 
     // remove old items
-    while (QLayoutItem *item = m_centeralLayout->takeAt(0))
+    while (QLayoutItem *item = m_centralLayout->takeAt(0))
     {
         delete item->widget();
         delete item;
@@ -229,9 +229,9 @@ void WirelessList::updateAPList()
             connect(apw, &AccessPointWidget::requestDeactiveAP, this, &WirelessList::deactiveAP);
 
             if(apw->active()) {
-                m_centeralLayout->insertWidget(0, apw);
+                m_centralLayout->insertWidget(0, apw);
             } else {
-                m_centeralLayout->addWidget(apw);
+                m_centralLayout->addWidget(apw);
             }
 
             ++avaliableAPCount;
@@ -240,7 +240,7 @@ void WirelessList::updateAPList()
 //    m_controlPanel->setSeperatorVisible(avaliableAPCount);
 
     const int contentHeight = avaliableAPCount * ITEM_HEIGHT;
-    m_centeralWidget->setFixedHeight(contentHeight);
+    m_centralWidget->setFixedHeight(contentHeight);
     setFixedHeight(std::min(contentHeight, MAX_HEIGHT));
 }
 
diff --git a/plugins/network/item/applet/wirelessapplet.h b/plugins/network/item/applet/wirelessapplet.h
index 839c7384c..a395189f2 100644
--- a/plugins/network/item/applet/wirelessapplet.h
+++ b/plugins/network/item/applet/wirelessapplet.h
@@ -63,8 +63,8 @@ private:
     QString m_lastConnPath;
     QString m_lastConnSecurity;
 
-    QVBoxLayout *m_centeralLayout;
-    QWidget *m_centeralWidget;
+    QVBoxLayout *m_centralLayout;
+    QWidget *m_centralWidget;
     DeviceControlWidget *m_controlPanel;
     DBusNetwork *m_networkInter;
 };
diff --git a/plugins/sound/sinkinputwidget.cpp b/plugins/sound/sinkinputwidget.cpp
index 75908a6d7..a653c73b6 100644
--- a/plugins/sound/sinkinputwidget.cpp
+++ b/plugins/sound/sinkinputwidget.cpp
@@ -19,18 +19,18 @@ SinkInputWidget::SinkInputWidget(const QString &inputPath, QWidget *parent)
     m_volumeSlider->setAccessibleName("app-" + iconName + "-slider");
     m_volumeSlider->setValue(m_inputInter->volume() * 1000);
 
-    QHBoxLayout *centeralLayout = new QHBoxLayout;
-    centeralLayout->addWidget(m_volumeIcon);
-    centeralLayout->addSpacing(10);
-    centeralLayout->addWidget(m_volumeSlider);
-    centeralLayout->setSpacing(2);
-    centeralLayout->setMargin(0);
+    QHBoxLayout *centralLayout = new QHBoxLayout;
+    centralLayout->addWidget(m_volumeIcon);
+    centralLayout->addSpacing(10);
+    centralLayout->addWidget(m_volumeSlider);
+    centralLayout->setSpacing(2);
+    centralLayout->setMargin(0);
 
     connect(m_volumeSlider, &VolumeSlider::valueChanged, this, &SinkInputWidget::setVolume);
     connect(m_volumeIcon, &DImageButton::clicked, this, &SinkInputWidget::setMute);
     connect(m_inputInter, &DBusSinkInput::MuteChanged, this, &SinkInputWidget::setMuteIcon);
 
-    setLayout(centeralLayout);
+    setLayout(centralLayout);
     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
     setFixedHeight(30);
 
diff --git a/plugins/sound/soundapplet.cpp b/plugins/sound/soundapplet.cpp
index deb7bcbb7..3c533fe59 100644
--- a/plugins/sound/soundapplet.cpp
+++ b/plugins/sound/soundapplet.cpp
@@ -14,7 +14,7 @@ DWIDGET_USE_NAMESPACE
 SoundApplet::SoundApplet(QWidget *parent)
     : QScrollArea(parent),
 
-      m_centeralWidget(new QWidget),
+      m_centralWidget(new QWidget),
       m_applicationTitle(new QWidget),
       m_volumeBtn(new DImageButton),
       m_volumeSlider(new VolumeSlider),
@@ -69,18 +69,18 @@ SoundApplet::SoundApplet(QWidget *parent)
     m_volumeSlider->setMinimum(0);
     m_volumeSlider->setMaximum(1000);
 
-    m_centeralLayout = new QVBoxLayout;
-    m_centeralLayout->addLayout(deviceLineLayout);
-    m_centeralLayout->addSpacing(8);
-    m_centeralLayout->addLayout(volumeCtrlLayout);
-    m_centeralLayout->addWidget(m_applicationTitle);
+    m_centralLayout = new QVBoxLayout;
+    m_centralLayout->addLayout(deviceLineLayout);
+    m_centralLayout->addSpacing(8);
+    m_centralLayout->addLayout(volumeCtrlLayout);
+    m_centralLayout->addWidget(m_applicationTitle);
 
-    m_centeralWidget->setLayout(m_centeralLayout);
-    m_centeralWidget->setFixedWidth(WIDTH);
-    m_centeralWidget->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
+    m_centralWidget->setLayout(m_centralLayout);
+    m_centralWidget->setFixedWidth(WIDTH);
+    m_centralWidget->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
 
     setFixedWidth(WIDTH);
-    setWidget(m_centeralWidget);
+    setWidget(m_centralWidget);
     setFrameStyle(QFrame::NoFrame);
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
@@ -148,8 +148,8 @@ void SoundApplet::volumeSliderValueChanged()
 
 void SoundApplet::sinkInputsChanged()
 {
-    m_centeralWidget->setVisible(false);
-    QVBoxLayout *appLayout = m_centeralLayout;
+    m_centralWidget->setVisible(false);
+    QVBoxLayout *appLayout = m_centralLayout;
     while (QLayoutItem *item = appLayout->takeAt(4))
     {
         delete item->widget();
@@ -164,9 +164,9 @@ void SoundApplet::sinkInputsChanged()
         appLayout->addWidget(si);
     }
 
-    const int contentHeight = m_centeralWidget->sizeHint().height();
-    m_centeralWidget->setFixedHeight(contentHeight);
-    m_centeralWidget->setVisible(true);
+    const int contentHeight = m_centralWidget->sizeHint().height();
+    m_centralWidget->setFixedHeight(contentHeight);
+    m_centralWidget->setVisible(true);
     setFixedHeight(std::min(contentHeight, MAX_HEIGHT));
 }
 
diff --git a/plugins/sound/soundapplet.h b/plugins/sound/soundapplet.h
index e600b782b..1a37820e2 100644
--- a/plugins/sound/soundapplet.h
+++ b/plugins/sound/soundapplet.h
@@ -34,11 +34,11 @@ private slots:
     void toggleMute();
 
 private:
-    QWidget *m_centeralWidget;
+    QWidget *m_centralWidget;
     QWidget *m_applicationTitle;
     Dtk::Widget::DImageButton *m_volumeBtn;
     VolumeSlider *m_volumeSlider;
-    QVBoxLayout *m_centeralLayout;
+    QVBoxLayout *m_centralLayout;
 
     DBusAudio *m_audioInter;
     DBusSink *m_defSinkInter;