diff --git a/QtScrcpy/device/controller/controller.cpp b/QtScrcpy/device/controller/controller.cpp
index 0ec988e..65fd60a 100644
--- a/QtScrcpy/device/controller/controller.cpp
+++ b/QtScrcpy/device/controller/controller.cpp
@@ -62,7 +62,7 @@ void Controller::updateScript(QString gameScript)
     connect(m_inputConvert, &InputConvertBase::grabCursor, this, &Controller::grabCursor);
 }
 
-void Controller::postTurnOn()
+void Controller::onPostTurnOn()
 {
     ControlMsg* controlMsg = new ControlMsg(ControlMsg::CMT_BACK_OR_SCREEN_ON);
     if (!controlMsg) {
@@ -71,42 +71,42 @@ void Controller::postTurnOn()
     postControlMsg(controlMsg);
 }
 
-void Controller::postGoHome()
+void Controller::onPostGoHome()
 {
     postKeyCodeClick(AKEYCODE_HOME);
 }
 
-void Controller::postGoMenu()
+void Controller::onPostGoMenu()
 {
     postKeyCodeClick(AKEYCODE_MENU);
 }
 
-void Controller::postGoBack()
+void Controller::onPostGoBack()
 {
     postKeyCodeClick(AKEYCODE_BACK);
 }
 
-void Controller::postAppSwitch()
+void Controller::onPostAppSwitch()
 {
     postKeyCodeClick(AKEYCODE_APP_SWITCH);
 }
 
-void Controller::postPower()
+void Controller::onPostPower()
 {
     postKeyCodeClick(AKEYCODE_POWER);
 }
 
-void Controller::postVolumeUp()
+void Controller::onPostVolumeUp()
 {
     postKeyCodeClick(AKEYCODE_VOLUME_UP);
 }
 
-void Controller::postVolumeDown()
+void Controller::onPostVolumeDown()
 {
     postKeyCodeClick(AKEYCODE_VOLUME_DOWN);
 }
 
-void Controller::expandNotificationPanel()
+void Controller::onExpandNotificationPanel()
 {
     ControlMsg* controlMsg = new ControlMsg(ControlMsg::CMT_EXPAND_NOTIFICATION_PANEL);
     if (!controlMsg) {
@@ -115,7 +115,7 @@ void Controller::expandNotificationPanel()
     postControlMsg(controlMsg);
 }
 
-void Controller::collapseNotificationPanel()
+void Controller::onCollapseNotificationPanel()
 {
     ControlMsg* controlMsg = new ControlMsg(ControlMsg::CMT_COLLAPSE_NOTIFICATION_PANEL);
     if (!controlMsg) {
@@ -124,7 +124,7 @@ void Controller::collapseNotificationPanel()
     postControlMsg(controlMsg);
 }
 
-void Controller::requestDeviceClipboard()
+void Controller::onRequestDeviceClipboard()
 {
     ControlMsg* controlMsg = new ControlMsg(ControlMsg::CMT_GET_CLIPBOARD);
     if (!controlMsg) {
@@ -133,7 +133,7 @@ void Controller::requestDeviceClipboard()
     postControlMsg(controlMsg);
 }
 
-void Controller::setDeviceClipboard()
+void Controller::onSetDeviceClipboard()
 {
     QClipboard *board = QApplication::clipboard();
     QString text = board->text();
@@ -145,14 +145,14 @@ void Controller::setDeviceClipboard()
     postControlMsg(controlMsg);
 }
 
-void Controller::clipboardPaste()
+void Controller::onClipboardPaste()
 {
     QClipboard *board = QApplication::clipboard();
     QString text = board->text();
-    postTextInput(text);
+    onPostTextInput(text);
 }
 
-void Controller::postTextInput(QString& text)
+void Controller::onPostTextInput(QString& text)
 {
     ControlMsg* controlMsg = new ControlMsg(ControlMsg::CMT_INJECT_TEXT);
     if (!controlMsg) {
@@ -162,7 +162,7 @@ void Controller::postTextInput(QString& text)
     postControlMsg(controlMsg);
 }
 
-void Controller::setScreenPowerMode(ControlMsg::ScreenPowerMode mode)
+void Controller::onSetScreenPowerMode(ControlMsg::ScreenPowerMode mode)
 {
     ControlMsg* controlMsg = new ControlMsg(ControlMsg::CMT_SET_SCREEN_POWER_MODE);
     if (!controlMsg) {
@@ -172,21 +172,21 @@ void Controller::setScreenPowerMode(ControlMsg::ScreenPowerMode mode)
     postControlMsg(controlMsg);
 }
 
-void Controller::mouseEvent(const QMouseEvent *from, const QSize &frameSize, const QSize &showSize)
+void Controller::onMouseEvent(const QMouseEvent *from, const QSize &frameSize, const QSize &showSize)
 {
     if (m_inputConvert) {
         m_inputConvert->mouseEvent(from, frameSize, showSize);
     }
 }
 
-void Controller::wheelEvent(const QWheelEvent *from, const QSize &frameSize, const QSize &showSize)
+void Controller::onWheelEvent(const QWheelEvent *from, const QSize &frameSize, const QSize &showSize)
 {
     if (m_inputConvert) {
         m_inputConvert->wheelEvent(from, frameSize, showSize);
     }
 }
 
-void Controller::keyEvent(const QKeyEvent *from, const QSize &frameSize, const QSize &showSize)
+void Controller::onKeyEvent(const QKeyEvent *from, const QSize &frameSize, const QSize &showSize)
 {
     if (m_inputConvert) {
         m_inputConvert->keyEvent(from, frameSize, showSize);
diff --git a/QtScrcpy/device/controller/controller.h b/QtScrcpy/device/controller/controller.h
index d6b1730..9bf14d0 100644
--- a/QtScrcpy/device/controller/controller.h
+++ b/QtScrcpy/device/controller/controller.h
@@ -22,27 +22,29 @@ public:
 
     void updateScript(QString gameScript = "");
 
-    // turn the screen on if it was off, press BACK otherwise
-    void postTurnOn();
-    void postGoHome();
-    void postGoMenu();
-    void postGoBack();
-    void postAppSwitch();
-    void postPower();
-    void postVolumeUp();
-    void postVolumeDown();
-    void expandNotificationPanel();
-    void collapseNotificationPanel();
-    void requestDeviceClipboard();
-    void setDeviceClipboard();
-    void clipboardPaste();
-    void postTextInput(QString& text);
-    void setScreenPowerMode(ControlMsg::ScreenPowerMode mode);
+public slots:
+    void onPostGoBack();
+    void onPostGoHome();
+    void onPostGoMenu();
+    void onPostAppSwitch();
+    void onPostPower();
+    void onPostVolumeUp();
+    void onPostVolumeDown();
+    void onExpandNotificationPanel();
+    void onCollapseNotificationPanel();
+    void onSetScreenPowerMode(ControlMsg::ScreenPowerMode mode);
 
     // for input convert
-    void mouseEvent(const QMouseEvent* from, const QSize& frameSize, const QSize& showSize);
-    void wheelEvent(const QWheelEvent* from, const QSize& frameSize, const QSize& showSize);
-    void keyEvent(const QKeyEvent* from, const QSize& frameSize, const QSize& showSize);
+    void onMouseEvent(const QMouseEvent* from, const QSize& frameSize, const QSize& showSize);
+    void onWheelEvent(const QWheelEvent* from, const QSize& frameSize, const QSize& showSize);
+    void onKeyEvent(const QKeyEvent* from, const QSize& frameSize, const QSize& showSize);
+
+    // turn the screen on if it was off, press BACK otherwise
+    void onPostTurnOn();
+    void onRequestDeviceClipboard();
+    void onSetDeviceClipboard();
+    void onClipboardPaste();
+    void onPostTextInput(QString& text);
 
 signals:
     void grabCursor(bool grab);
diff --git a/QtScrcpy/device/device.cpp b/QtScrcpy/device/device.cpp
index 53304f5..bde630e 100644
--- a/QtScrcpy/device/device.cpp
+++ b/QtScrcpy/device/device.cpp
@@ -80,16 +80,6 @@ VideoForm *Device::getVideoForm()
     return m_videoForm;
 }
 
-Controller *Device::getController()
-{
-    return m_controller;
-}
-
-FileHandler *Device::getFileHandler()
-{
-    return m_fileHandler;
-}
-
 Server *Device::getServer()
 {
     return m_server;
@@ -119,35 +109,84 @@ void Device::onScreenshot()
     m_vb->unLock();
 }
 
+void Device::onShowTouch(bool show)
+{
+    AdbProcess* adb = new AdbProcess();
+    if (!adb) {
+        return;
+    }
+    connect(adb, &AdbProcess::adbProcessResult, this, [this](AdbProcess::ADB_EXEC_RESULT processResult){
+        if (AdbProcess::AER_SUCCESS_START != processResult) {
+            sender()->deleteLater();
+        }
+    });
+    adb->setShowTouchesEnabled(getSerial(), show);
+
+    qInfo() << getSerial() << " show touch " << (show ? "enable" : "disable");
+}
+
 void Device::initSignals()
 {
+    connect(this, &Device::screenshot, this, &Device::onScreenshot);
+    connect(this, &Device::showTouch, this, &Device::onShowTouch);
+    connect(this, &Device::setMainControl, this, &Device::onSetMainControl);
+
     if (m_controller && m_videoForm) {
         connect(m_controller, &Controller::grabCursor, m_videoForm, &VideoForm::onGrabCursor);
-        connect(m_videoForm, &VideoForm::screenshot, this, &Device::onScreenshot);
+    }
+    if (m_controller) {
+        connect(this, &Device::postGoBack, m_controller, &Controller::onPostGoBack);
+        connect(this, &Device::postGoHome, m_controller, &Controller::onPostGoHome);
+        connect(this, &Device::postGoMenu, m_controller, &Controller::onPostGoMenu);
+        connect(this, &Device::postAppSwitch, m_controller, &Controller::onPostAppSwitch);
+        connect(this, &Device::postPower, m_controller, &Controller::onPostPower);
+        connect(this, &Device::postVolumeUp, m_controller, &Controller::onPostVolumeUp);
+        connect(this, &Device::postVolumeDown, m_controller, &Controller::onPostVolumeDown);
+        connect(this, &Device::setScreenPowerMode, m_controller, &Controller::onSetScreenPowerMode);
+        connect(this, &Device::expandNotificationPanel, m_controller, &Controller::onExpandNotificationPanel);
+        connect(this, &Device::mouseEvent, m_controller, &Controller::onMouseEvent);
+        connect(this, &Device::wheelEvent, m_controller, &Controller::onWheelEvent);
+        connect(this, &Device::keyEvent, m_controller, &Controller::onKeyEvent);
+
+        connect(this, &Device::postTurnOn, m_controller, &Controller::onPostTurnOn);
+        connect(this, &Device::requestDeviceClipboard, m_controller, &Controller::onRequestDeviceClipboard);
+        connect(this, &Device::setDeviceClipboard, m_controller, &Controller::onSetDeviceClipboard);
+        connect(this, &Device::clipboardPaste, m_controller, &Controller::onClipboardPaste);
+        connect(this, &Device::postTextInput, m_controller, &Controller::onPostTextInput);
     }
     if (m_videoForm) {
         connect(m_videoForm, &VideoForm::destroyed, this, [this](QObject *obj){
             Q_UNUSED(obj)
             deleteLater();
         });
+
+        connect(this, &Device::switchFullScreen, m_videoForm, &VideoForm::onSwitchFullScreen);
     }
     if (m_fileHandler) {
+        connect(this, &Device::pushFileRequest, m_fileHandler, &FileHandler::onPushFileRequest);
+        connect(this, &Device::installApkRequest, m_fileHandler, &FileHandler::onInstallApkRequest);
         connect(m_fileHandler, &FileHandler::fileHandlerResult, this, [this](FileHandler::FILE_HANDLER_RESULT processResult, bool isApk){
-            QString tips = "";
+            QString tipsType = "";
             if (isApk) {
-                tips = tr("install apk");
+                tipsType = tr("install apk");
             } else {
-                tips = tr("file transfer");
+                tipsType = tr("file transfer");
             }
+            QString tips;
             if (FileHandler::FAR_IS_RUNNING == processResult && m_videoForm) {
-                QMessageBox::warning(m_videoForm, "QtScrcpy", tr("wait current %1 to complete").arg(tips), QMessageBox::Ok);
+                tips = tr("wait current %1 to complete").arg(tipsType);
             }
             if (FileHandler::FAR_SUCCESS_EXEC == processResult && m_videoForm) {
-                QMessageBox::information(m_videoForm, "QtScrcpy", tr("%1 complete, save in %2").arg(tips).arg(Config::getInstance().getPushFilePath()), QMessageBox::Ok);
+                tips = tr("%1 complete, save in %2").arg(tipsType).arg(Config::getInstance().getPushFilePath());
             }
             if (FileHandler::FAR_ERROR_EXEC == processResult && m_videoForm) {
-                QMessageBox::information(m_videoForm, "QtScrcpy", tr("%1 failed").arg(tips), QMessageBox::Ok);
+                tips = tr("%1 failed").arg(tipsType);
             }
+            qInfo() << tips;
+            if (!m_mainControl) {
+                return;
+            }
+            QMessageBox::information(m_videoForm, "QtScrcpy", tips, QMessageBox::Ok);
         });
     }
 
@@ -186,7 +225,7 @@ void Device::initSignals()
 
                 // 显示界面时才自动息屏（m_params.display）
                 if (m_params.closeScreen && m_params.display && m_controller) {
-                    m_controller->setScreenPowerMode(ControlMsg::SPM_OFF);
+                    emit m_controller->onSetScreenPowerMode(ControlMsg::SPM_OFF);
                 }
             }
         });
@@ -239,13 +278,13 @@ void Device::startServer()
     });
 }
 
-void Device::setMainControl(bool mainControl)
+void Device::onSetMainControl(Device* device, bool mainControl)
 {
+    Q_UNUSED(device)
     if (m_mainControl == mainControl) {
         return;
     }
     m_mainControl = mainControl;
-    emit mainControlChange(this, m_mainControl);
 }
 
 bool Device::mainControl()
diff --git a/QtScrcpy/device/device.h b/QtScrcpy/device/device.h
index e45aa50..c5363b8 100644
--- a/QtScrcpy/device/device.h
+++ b/QtScrcpy/device/device.h
@@ -4,6 +4,11 @@
 #include <QPointer>
 #include <QTime>
 
+#include "controlmsg.h"
+
+class QMouseEvent;
+class QWheelEvent;
+class QKeyEvent;
 class Recorder;
 class Server;
 class VideoBuffer;
@@ -34,21 +39,46 @@ public:
     virtual ~Device();
 
     VideoForm *getVideoForm();
-    Controller *getController();
-    FileHandler *getFileHandler();
     Server *getServer();
     const QString &getSerial();
 
     void updateScript(QString script);
-    void setMainControl(bool mainControl);
     bool mainControl();
 
 signals:
     void deviceDisconnect(QString serial);
-    void mainControlChange(Device* device, bool mainControl);
+
+    void switchFullScreen();
+    void postGoBack();
+    void postGoHome();
+    void postGoMenu();
+    void postAppSwitch();
+    void postPower();
+    void postVolumeUp();
+    void postVolumeDown();
+    void setScreenPowerMode(ControlMsg::ScreenPowerMode mode);
+    void expandNotificationPanel();
+    void screenshot();
+    void showTouch(bool show);
+    void setMainControl(Device* device, bool mainControl);
+
+    void mouseEvent(const QMouseEvent* from, const QSize& frameSize, const QSize& showSize);
+    void wheelEvent(const QWheelEvent* from, const QSize& frameSize, const QSize& showSize);
+    void keyEvent(const QKeyEvent* from, const QSize& frameSize, const QSize& showSize);
+
+    void postTurnOn();
+    void postTextInput(QString& text);
+    void requestDeviceClipboard();
+    void setDeviceClipboard();
+    void clipboardPaste();
+
+    void pushFileRequest(const QString& serial, const QString& file, const QString& devicePath = "");
+    void installApkRequest(const QString& serial, const QString& apkFile);
 
 public slots:
     void onScreenshot();
+    void onShowTouch(bool show);
+    void onSetMainControl(Device* device, bool mainControl);
 
 private:
     void initSignals();
diff --git a/QtScrcpy/device/filehandler/filehandler.cpp b/QtScrcpy/device/filehandler/filehandler.cpp
index c92425d..4730f6c 100644
--- a/QtScrcpy/device/filehandler/filehandler.cpp
+++ b/QtScrcpy/device/filehandler/filehandler.cpp
@@ -24,7 +24,7 @@ FileHandler::~FileHandler()
 
 }
 
-void FileHandler::pushFileRequest(const QString &serial, const QString &file, const QString& devicePath)
+void FileHandler::onPushFileRequest(const QString &serial, const QString &file, const QString& devicePath)
 {
     if (m_adb.isRuning()) {
         emit fileHandlerResult(FAR_IS_RUNNING, false);
@@ -35,7 +35,7 @@ void FileHandler::pushFileRequest(const QString &serial, const QString &file, co
     m_adb.push(serial, file, devicePath);
 }
 
-void FileHandler::installApkRequest(const QString &serial, const QString &apkFile)
+void FileHandler::onInstallApkRequest(const QString &serial, const QString &apkFile)
 {
     if (m_adb.isRuning()) {
         emit fileHandlerResult(FAR_IS_RUNNING, true);
diff --git a/QtScrcpy/device/filehandler/filehandler.h b/QtScrcpy/device/filehandler/filehandler.h
index 3a2023c..8c48db1 100644
--- a/QtScrcpy/device/filehandler/filehandler.h
+++ b/QtScrcpy/device/filehandler/filehandler.h
@@ -17,10 +17,12 @@ public:
     FileHandler(QObject *parent = nullptr);
     virtual ~FileHandler();
 
-    void pushFileRequest(const QString& serial, const QString& file, const QString& devicePath = "");
-    void installApkRequest(const QString& serial, const QString& apkFile);
     const QString &getDevicePath();
 
+public slots:
+    void onPushFileRequest(const QString& serial, const QString& file, const QString& devicePath = "");
+    void onInstallApkRequest(const QString& serial, const QString& apkFile);
+
 signals:
     void fileHandlerResult(FILE_HANDLER_RESULT processResult, bool isApk = false);
 
diff --git a/QtScrcpy/device/ui/toolform.cpp b/QtScrcpy/device/ui/toolform.cpp
index 9cceb5a..6fe898a 100644
--- a/QtScrcpy/device/ui/toolform.cpp
+++ b/QtScrcpy/device/ui/toolform.cpp
@@ -97,87 +97,91 @@ void ToolForm::hideEvent(QHideEvent *event)
 
 void ToolForm::on_fullScreenBtn_clicked()
 {
-    if (!m_device || !m_device->getVideoForm()) {
+    if (!m_device) {
         return;
     }
-    m_device->getVideoForm()->switchFullScreen();
+
+    emit m_device->switchFullScreen();
 }
 
 void ToolForm::on_returnBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->postGoBack();
+    emit m_device->postGoBack();
 }
 
 void ToolForm::on_homeBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->postGoHome();
+    emit m_device->postGoHome();
 }
 
 void ToolForm::on_menuBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->postGoMenu();
+   emit m_device->postGoMenu();
 }
 
 void ToolForm::on_appSwitchBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->postAppSwitch();
+    emit m_device->postAppSwitch();
 }
 
 void ToolForm::on_powerBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->postPower();
+    emit m_device->postPower();
 }
 
 void ToolForm::on_screenShotBtn_clicked()
 {
-    emit screenshot();
+    if (!m_device) {
+        return;
+    }
+    emit m_device->screenshot();
 }
 
 void ToolForm::on_volumeUpBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->postVolumeUp();
+    emit m_device->postVolumeUp();
 }
 
 void ToolForm::on_volumeDownBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->postVolumeDown();
+    emit m_device->postVolumeDown();
 }
 
 void ToolForm::on_closeScreenBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-     m_device->getController()->setScreenPowerMode(ControlMsg::SPM_OFF);
+    emit m_device->setScreenPowerMode(ControlMsg::SPM_OFF);
 }
 
 void ToolForm::on_expandNotifyBtn_clicked()
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->expandNotificationPanel();
+    emit m_device->expandNotificationPanel();
 }
 
 void ToolForm::on_touchBtn_clicked()
@@ -187,19 +191,7 @@ void ToolForm::on_touchBtn_clicked()
     }
 
     m_showTouch = !m_showTouch;
-
-    AdbProcess* adb = new AdbProcess();
-    if (!adb) {
-        return;
-    }
-    connect(adb, &AdbProcess::adbProcessResult, this, [this](AdbProcess::ADB_EXEC_RESULT processResult){
-        if (AdbProcess::AER_SUCCESS_START != processResult) {
-            sender()->deleteLater();
-        }
-    });
-    adb->setShowTouchesEnabled(m_device->getSerial(), m_showTouch);
-
-    qInfo() << "show touch " << (m_showTouch ? "enable" : "disable");
+    emit m_device->showTouch(m_showTouch);
 }
 
 void ToolForm::on_groupControlBtn_clicked()
@@ -207,6 +199,6 @@ void ToolForm::on_groupControlBtn_clicked()
     if (!m_device) {
         return;
     }
-    m_device->setMainControl(!m_device->mainControl());
+    emit m_device->setMainControl(m_device, !m_device->mainControl());
     updateGroupControl();
 }
diff --git a/QtScrcpy/device/ui/toolform.h b/QtScrcpy/device/ui/toolform.h
index 678a984..28f38c5 100644
--- a/QtScrcpy/device/ui/toolform.h
+++ b/QtScrcpy/device/ui/toolform.h
@@ -29,34 +29,19 @@ protected:
     void showEvent(QShowEvent *event);
     void hideEvent(QHideEvent *event);
 
-signals:
-    void screenshot();
-
 private slots:
     void on_fullScreenBtn_clicked();
-
     void on_returnBtn_clicked();
-
     void on_homeBtn_clicked();
-
     void on_menuBtn_clicked();
-
     void on_appSwitchBtn_clicked();
-
     void on_powerBtn_clicked();
-
     void on_screenShotBtn_clicked();
-
     void on_volumeUpBtn_clicked();
-
     void on_volumeDownBtn_clicked();
-
     void on_closeScreenBtn_clicked();
-
     void on_expandNotifyBtn_clicked();
-
     void on_touchBtn_clicked();
-
     void on_groupControlBtn_clicked();
 
 private:
diff --git a/QtScrcpy/device/ui/videoform.cpp b/QtScrcpy/device/ui/videoform.cpp
index 63b2f4e..5972608 100644
--- a/QtScrcpy/device/ui/videoform.cpp
+++ b/QtScrcpy/device/ui/videoform.cpp
@@ -100,7 +100,6 @@ void VideoForm::showToolForm(bool show)
     if (!m_toolForm) {
         m_toolForm = new ToolForm(this, ToolForm::AP_OUTSIDE_RIGHT);
         m_toolForm->setDevice(m_device);
-        connect(m_toolForm, &ToolForm::screenshot, this, &VideoForm::screenshot);
     }
     m_toolForm->move(pos().x() + geometry().width(), pos().y() + 30);
     m_toolForm->setVisible(show);
@@ -174,7 +173,7 @@ void VideoForm::updateShowSize(const QSize &newSize)
         }
 
         if (isFullScreen()) {
-            switchFullScreen();
+            onSwitchFullScreen();
         }
         if (m_skin) {
             QMargins m = getMargins(vertical);
@@ -192,7 +191,7 @@ void VideoForm::updateShowSize(const QSize &newSize)
     }
 }
 
-void VideoForm::switchFullScreen()
+void VideoForm::onSwitchFullScreen()
 {
     if (isFullScreen()) {
         // 横屏全屏铺满全屏，恢复时，恢复保持宽高比
@@ -263,11 +262,11 @@ void VideoForm::setDevice(Device *device)
 void VideoForm::mousePressEvent(QMouseEvent *event)
 {
     if (m_videoWidget->geometry().contains(event->pos())) {
-        if (!m_device || !m_device->getController()) {
+        if (!m_device) {
             return;
         }
         event->setLocalPos(m_videoWidget->mapFrom(this, event->localPos().toPoint()));
-        m_device->getController()->mouseEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
+        emit m_device->mouseEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
     } else {
         if (event->button() == Qt::LeftButton) {
             m_dragPosition = event->globalPos() - frameGeometry().topLeft();
@@ -279,7 +278,7 @@ void VideoForm::mousePressEvent(QMouseEvent *event)
 void VideoForm::mouseReleaseEvent(QMouseEvent *event)
 {
     if (m_dragPosition.isNull()) {
-        if (!m_device || !m_device->getController()) {
+        if (!m_device) {
             return;
         }
         event->setLocalPos(m_videoWidget->mapFrom(this, event->localPos().toPoint()));
@@ -298,7 +297,7 @@ void VideoForm::mouseReleaseEvent(QMouseEvent *event)
             local.setY(m_videoWidget->height());
         }
         event->setLocalPos(local);
-        m_device->getController()->mouseEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
+        emit m_device->mouseEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
     } else {
         m_dragPosition = QPoint(0, 0);
     }
@@ -307,11 +306,11 @@ void VideoForm::mouseReleaseEvent(QMouseEvent *event)
 void VideoForm::mouseMoveEvent(QMouseEvent *event)
 {
     if (m_videoWidget->geometry().contains(event->pos())) {
-        if (!m_device || !m_device->getController()) {
+        if (!m_device) {
             return;
         }
         event->setLocalPos(m_videoWidget->mapFrom(this, event->localPos().toPoint()));
-        m_device->getController()->mouseEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
+        emit m_device->mouseEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
     } else if (!m_dragPosition.isNull()){
         if (event->buttons() & Qt::LeftButton) {
             move(event->globalPos() - m_dragPosition);
@@ -323,7 +322,7 @@ void VideoForm::mouseMoveEvent(QMouseEvent *event)
 void VideoForm::wheelEvent(QWheelEvent *event)
 {
     if (m_videoWidget->geometry().contains(event->pos())) {
-        if (!m_device || !m_device->getController()) {
+        if (!m_device) {
             return;
         }
         QPointF pos = m_videoWidget->mapFrom(this, event->pos());
@@ -334,7 +333,7 @@ void VideoForm::wheelEvent(QWheelEvent *event)
         */
         QWheelEvent wheelEvent(pos, event->globalPosF(), event->delta(),
                                event->buttons(), event->modifiers(), event->orientation());
-        m_device->getController()->wheelEvent(&wheelEvent, m_videoWidget->frameSize(), m_videoWidget->size());
+        emit m_device->wheelEvent(&wheelEvent, m_videoWidget->frameSize(), m_videoWidget->size());
     }
 }
 
@@ -343,32 +342,32 @@ void VideoForm::keyPressEvent(QKeyEvent *event)
     if (Qt::Key_Escape == event->key()
             && !event->isAutoRepeat()
             && isFullScreen()) {
-        switchFullScreen();
+        onSwitchFullScreen();
     }
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
     if (event->key() == Qt::Key_C && (event->modifiers() & Qt::ControlModifier)) {
-        m_device->getController()->requestDeviceClipboard();
+        emit m_device->requestDeviceClipboard();
     }
     if (event->key() == Qt::Key_V && (event->modifiers() & Qt::ControlModifier)) {
         if (event->modifiers() & Qt::ShiftModifier) {
-            m_device->getController()->setDeviceClipboard();
+            emit m_device->setDeviceClipboard();
         } else {
-            m_device->getController()->clipboardPaste();
+            emit m_device->clipboardPaste();
         }
         return;
     }
 
-    m_device->getController()->keyEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
+    emit m_device->keyEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
 }
 
 void VideoForm::keyReleaseEvent(QKeyEvent *event)
 {
-    if (!m_device || !m_device->getController()) {
+    if (!m_device) {
         return;
     }
-    m_device->getController()->keyEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
+    emit m_device->keyEvent(event, m_videoWidget->frameSize(), m_videoWidget->size());
 }
 
 void VideoForm::paintEvent(QPaintEvent *paint)
@@ -431,7 +430,7 @@ void VideoForm::dragLeaveEvent(QDragLeaveEvent *event)
 
 void VideoForm::dropEvent(QDropEvent *event)
 {
-    if (!m_device || !m_device->getFileHandler()) {
+    if (!m_device) {
         return;
     }
     const QMimeData* qm = event->mimeData();
@@ -444,8 +443,8 @@ void VideoForm::dropEvent(QDropEvent *event)
     }
 
     if (fileInfo.isFile() && fileInfo.suffix() == "apk") {
-        m_device->getFileHandler()->installApkRequest(m_device->getSerial(), file);
+        emit m_device->installApkRequest(m_device->getSerial(), file);
         return;
     }
-    m_device->getFileHandler()->pushFileRequest(m_device->getSerial(), file, Config::getInstance().getPushFilePath() + fileInfo.fileName());
+    emit m_device->pushFileRequest(m_device->getSerial(), file, Config::getInstance().getPushFilePath() + fileInfo.fileName());
 }
diff --git a/QtScrcpy/device/ui/videoform.h b/QtScrcpy/device/ui/videoform.h
index 26e5631..7df3248 100644
--- a/QtScrcpy/device/ui/videoform.h
+++ b/QtScrcpy/device/ui/videoform.h
@@ -20,17 +20,14 @@ public:
     explicit VideoForm(bool skin = true, QWidget *parent = 0);
     ~VideoForm();
 
-    void switchFullScreen();    
     void staysOnTop(bool top = true);
     void updateShowSize(const QSize &newSize);
     void updateRender(const AVFrame *frame);
     void setDevice(Device *device);
 
-signals:
-    void screenshot();
-
 public slots:
     void onGrabCursor(bool grab);
+    void onSwitchFullScreen();
 
 private:    
     void updateStyleSheet(bool vertical);