fix: fix fail to kill linglong app

Previously, when killing an application, system-monitor needed to
obtain the pid of the app. However, on a desktop environment using X11,
system-monitor obtained an inaccurate pid of the linglong app, which
resulted in failure to kill the app or accidental killing. Now consider
using the window manager to kill the application, because the window
manager contains detailed information about the application window.

Log: fix fail to kill linglong app
Bug: https://pms.uniontech.com/bug-view-283189.html

deepin-system-monitor-main/gui/main_window.cpp

@@ -110,12 +110,15 @@ void MainWindow::initUI()
     // adjust toolbar tab order
     setTabOrder(titlebar(), m_toolbar);
 
-    // kill process menu item
-    QAction *killAction = new QAction(DApplication::translate("Title.Bar.Context.Menu", "Force end application"), menu);
-    // control + alt + k
-    killAction->setShortcut(QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_K));
-    // emit process kill requested signal if kill process menu item triggered
-    connect(killAction, &QAction::triggered, this, [=]() { Q_EMIT killProcessPerformed(); });
+    if (QDBusConnection::sessionBus().interface()->isServiceRegistered(QStringLiteral("org.kde.KWin"))) {
+        // kill process menu item
+        QAction *killAction = new QAction(DApplication::translate("Title.Bar.Context.Menu", "Force end application"), menu);
+        // control + alt + k
+        killAction->setShortcut(QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_K));
+        // emit process kill requested signal if kill process menu item triggered
+        connect(killAction, &QAction::triggered, this, [=]() { Q_EMIT killProcessPerformed(); });
+        menu->addAction(killAction);
+    }
 
     // display mode menu item
     DMenu *modeMenu = new DMenu(DApplication::translate("Title.Bar.Context.Menu", "View"), menu);
@@ -155,7 +158,6 @@ void MainWindow::initUI()
     QAction *settingAction(new QAction(tr("Settings"), this));
     connect(settingAction, &QAction::triggered, this, &MainWindow::popupSettingsDialog);
 
-    menu->addAction(killAction);
     menu->addSeparator();
     menu->addMenu(modeMenu);
 
@@ -249,6 +251,8 @@ void MainWindow::initConnections()
 
     connect(&DetailWidgetManager::getInstance(), &DetailWidgetManager::sigJumpToProcessWidget, this, &MainWindow::onDetailInfoByDbus, Qt::QueuedConnection);
     connect(&DetailWidgetManager::getInstance(), &DetailWidgetManager::sigJumpToDetailWidget, this, &MainWindow::onDetailInfoByDbus, Qt::QueuedConnection);
+
+    connect(this, &MainWindow::killProcessPerformed, this, &MainWindow::onKillProcess);
 }
 
 // resize event handler
@@ -361,3 +365,14 @@ void MainWindow::popupSettingsDialog()
     // 销毁窗口
     dialog->deleteLater();
 }
+
+void MainWindow::onKillProcess()
+{
+    if (QDBusConnection::sessionBus().interface()->isServiceRegistered(QStringLiteral("org.kde.KWin"))) {
+        auto message = QDBusMessage::createMethodCall(QStringLiteral("org.kde.KWin"),
+                                                    QStringLiteral("/KWin"),
+                                                    QStringLiteral("org.kde.KWin"),
+                                                    QStringLiteral("killWindow"));
+        QDBusConnection::sessionBus().asyncCall(message);
+    }
+}

deepin-system-monitor-main/gui/main_window.h

@@ -85,6 +85,11 @@ public Q_SLOTS:
      */
     void popupSettingsDialog();
 
+    /**
+     * @brief onKillProcess
+     */
+    void onKillProcess();
+
 protected:
     /**
      * @brief Initialize ui components

deepin-system-monitor-main/gui/process_page_widget.cpp

@@ -270,8 +270,8 @@ void ProcessPageWidget::initConnections()
 {
     auto *mainWindow = gApp->mainWindow();
     // kill application signal triggered, show application kill preview widget
-    connect(mainWindow, &MainWindow::killProcessPerformed, this,
-            &ProcessPageWidget::showWindowKiller);
+    // connect(mainWindow, &MainWindow::killProcessPerformed, this,
+    //         &ProcessPageWidget::showWindowKiller);
     // switch display mode signal triggered, switch performance display mode
     connect(mainWindow, &MainWindow::displayModeChanged, this,
             &ProcessPageWidget::switchDisplayMode);