diff --git a/libtaskmanager/abstracttasksmodel.h b/libtaskmanager/abstracttasksmodel.h
index 7f5dedc5c..8472388ef 100644
--- a/libtaskmanager/abstracttasksmodel.h
+++ b/libtaskmanager/abstracttasksmodel.h
@@ -79,7 +79,7 @@ public:
         IsVirtualDesktopChangeable, /**< requestVirtualDesktop (see below) available. */
         VirtualDesktop,   /**< Virtual desktop for the task (i.e. window). */
         IsOnAllVirtualDesktops, /**< Task is on all virtual desktops. */
-        ScreenGeometry,   /**< Screen geometry for the task (i.e. the window's screen). */
+        Screen,           /**< Screen for the task (i.e. window). */
         Activities,       /**< Activities for the task (i.e. window). */
         IsDemandingAttention, /**< Task is demanding attention. */
         SkipTaskbar       /**< Task desires not to be shown in a user interface. */
diff --git a/libtaskmanager/startuptasksmodel.cpp b/libtaskmanager/startuptasksmodel.cpp
index 2847ffe98..3fda2db54 100644
--- a/libtaskmanager/startuptasksmodel.cpp
+++ b/libtaskmanager/startuptasksmodel.cpp
@@ -254,7 +254,11 @@ QVariant StartupTasksModel::data(const QModelIndex &index, int role) const
         return data.desktop();
     } else if (role == IsOnAllVirtualDesktops) {
         return (data.desktop() == 0);
-    }
+    } /* else if (role == Screen) {
+        // You might be tempted to do this, but KStartupInfoData::screen()
+        // is actually the X11 screen.
+        return (data.screen() == 0);
+    } */
 
     return QVariant();
 }
diff --git a/libtaskmanager/taskfilterproxymodel.cpp b/libtaskmanager/taskfilterproxymodel.cpp
index 5acb79592..79b902e5b 100644
--- a/libtaskmanager/taskfilterproxymodel.cpp
+++ b/libtaskmanager/taskfilterproxymodel.cpp
@@ -32,7 +32,7 @@ public:
     AbstractTasksModelIface *sourceTasksModel = nullptr;
 
     uint virtualDesktop = 0;
-    QRect screenGeometry;
+    int screen = -1;
     QString activity;
 
     bool filterByVirtualDesktop = false;
@@ -84,21 +84,21 @@ void TaskFilterProxyModel::setVirtualDesktop(uint virtualDesktop)
     }
 }
 
-QRect TaskFilterProxyModel::screenGeometry() const
+int TaskFilterProxyModel::screen() const
 {
-    return d->screenGeometry;
+    return d->screen;
 }
 
-void TaskFilterProxyModel::setScreenGeometry(const QRect &geometry)
+void TaskFilterProxyModel::setScreen(int screen)
 {
-    if (d->screenGeometry != geometry) {
-        d->screenGeometry = geometry;
+    if (d->screen != screen) {
+        d->screen = screen;
 
         if (d->filterByScreen) {
             invalidateFilter();
         }
 
-        emit screenGeometryChanged();
+        emit screenChanged();
     }
 }
 
@@ -303,11 +303,16 @@ bool TaskFilterProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &so
     }
 
     // Filter by screen.
-    if (d->filterByScreen && d->screenGeometry.isValid()) {
-        const QRect &screenGeometry = sourceIdx.data(AbstractTasksModel::ScreenGeometry).toRect();
+    if (d->filterByScreen && d->screen != -1) {
+        const QVariant &screen = sourceIdx.data(AbstractTasksModel::Screen);
 
-        if (screenGeometry.isValid() && screenGeometry != d->screenGeometry) {
-            return false;
+        if (!screen.isNull()) {
+            bool ok = false;
+            const int i = screen.toInt(&ok);
+
+            if (ok && i != -1 && i != d->screen) {
+                return false;
+            }
         }
     }
 
diff --git a/libtaskmanager/taskfilterproxymodel.h b/libtaskmanager/taskfilterproxymodel.h
index 51b63fc99..ebe70b769 100644
--- a/libtaskmanager/taskfilterproxymodel.h
+++ b/libtaskmanager/taskfilterproxymodel.h
@@ -22,7 +22,6 @@ License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 #define TASKFILTERPROXYMODEL_H
 
 #include <QSortFilterProxyModel>
-#include <QRect>
 
 #include "abstracttasksmodeliface.h"
 
@@ -46,7 +45,7 @@ class TASKMANAGER_EXPORT TaskFilterProxyModel : public QSortFilterProxyModel, pu
     Q_OBJECT
 
     Q_PROPERTY(int virtualDesktop READ virtualDesktop WRITE setVirtualDesktop NOTIFY virtualDesktopChanged)
-    Q_PROPERTY(QRect screenGeomeyry READ screenGeometry WRITE setScreenGeometry NOTIFY screenGeometryChanged)
+    Q_PROPERTY(int screen READ screen WRITE setScreen NOTIFY screenChanged)
     Q_PROPERTY(QString activity READ activity WRITE setActivity NOTIFY activityChanged)
 
     Q_PROPERTY(bool filterByVirtualDesktop READ filterByVirtualDesktop WRITE setFilterByVirtualDesktop NOTIFY filterByVirtualDesktopChanged)
@@ -83,23 +82,23 @@ public:
     void setVirtualDesktop(uint virtualDesktop);
 
     /**
-     * The geometry of the screen used in filtering by screen. Defaults
-     * to a null QRect.
+     * The number of the screen used in filtering by screen. Usually
+     * set to the number of the current screen. Defaults to @c -1.
      *
-     * @see setGeometryScreen
-     * @returns the geometry of the screen used in filtering.
+     * @see setScreen
+     * @returns the number of the screen used in filtering.
      **/
-    QRect screenGeometry() const;
+    int screen() const;
 
     /**
-     * Set the geometry of the screen to use in filtering by screen.
+     * Set the number of the screen to use in filtering by screen.
      *
-     * If set to an invalid QRect, filtering by screen is disabled.
+     * If set to @c -1, filtering by screen is disabled.
      *
-     * @see screenGeometry
-     * @param geometry A screen geometry.
+     * @see screen
+     * @param screen A screen number.
      **/
-    void setScreenGeometry(const QRect &geometry);
+    void setScreen(int screen);
 
     /**
      * The id of the activity used in filtering by activity. Usually
@@ -341,7 +340,7 @@ public:
 
 Q_SIGNALS:
     void virtualDesktopChanged() const;
-    void screenGeometryChanged() const;
+    void screenChanged() const;
     void activityChanged() const;
     void filterByVirtualDesktopChanged() const;
     void filterByScreenChanged() const;
diff --git a/libtaskmanager/taskgroupingproxymodel.cpp b/libtaskmanager/taskgroupingproxymodel.cpp
index 69ea16a26..5839c52d7 100644
--- a/libtaskmanager/taskgroupingproxymodel.cpp
+++ b/libtaskmanager/taskgroupingproxymodel.cpp
@@ -742,7 +742,7 @@ QVariant TaskGroupingProxyModel::data(const QModelIndex &proxyIndex, int role) c
             // TODO: Nothing needs this for now and it would add complexity to
             // make it a list; skip it until needed.
             return QVariant();
-        } else if (role == AbstractTasksModel::ScreenGeometry) {
+        } else if (role == AbstractTasksModel::Screen) {
             // TODO: Nothing needs this for now and it would add complexity to
             // make it a list; skip it until needed.
             return QVariant();
diff --git a/libtaskmanager/tasksmodel.cpp b/libtaskmanager/tasksmodel.cpp
index 4e3286406..bf37042da 100644
--- a/libtaskmanager/tasksmodel.cpp
+++ b/libtaskmanager/tasksmodel.cpp
@@ -294,8 +294,8 @@ void TasksModel::Private::initModels()
     filterProxyModel->setSourceModel(concatProxyModel);
     QObject::connect(filterProxyModel, &TaskFilterProxyModel::virtualDesktopChanged,
         q, &TasksModel::virtualDesktopChanged);
-    QObject::connect(filterProxyModel, &TaskFilterProxyModel::screenGeometryChanged,
-        q, &TasksModel::screenGeometryChanged);
+    QObject::connect(filterProxyModel, &TaskFilterProxyModel::screenChanged,
+        q, &TasksModel::screenChanged);
     QObject::connect(filterProxyModel, &TaskFilterProxyModel::activityChanged,
         q, &TasksModel::activityChanged);
     QObject::connect(filterProxyModel, &TaskFilterProxyModel::filterByVirtualDesktopChanged,
@@ -878,14 +878,14 @@ void TasksModel::setVirtualDesktop(int virtualDesktop)
     d->filterProxyModel->setVirtualDesktop(virtualDesktop);
 }
 
-QRect TasksModel::screenGeometry() const
+int TasksModel::screen() const
 {
-    return d->filterProxyModel->screenGeometry();
+    return d->filterProxyModel->screen();
 }
 
-void TasksModel::setScreenGeometry(const QRect &geometry)
+void TasksModel::setScreen(int screen)
 {
-    d->filterProxyModel->setScreenGeometry(geometry);
+    d->filterProxyModel->setScreen(screen);
 }
 
 QString TasksModel::activity() const
diff --git a/libtaskmanager/tasksmodel.h b/libtaskmanager/tasksmodel.h
index 303e69f9d..5f991bbef 100644
--- a/libtaskmanager/tasksmodel.h
+++ b/libtaskmanager/tasksmodel.h
@@ -68,7 +68,7 @@ class TASKMANAGER_EXPORT TasksModel : public QSortFilterProxyModel, public Abstr
     Q_PROPERTY(bool anyTaskDemandsAttention READ anyTaskDemandsAttention NOTIFY anyTaskDemandsAttentionChanged)
 
     Q_PROPERTY(int virtualDesktop READ virtualDesktop WRITE setVirtualDesktop NOTIFY virtualDesktopChanged)
-    Q_PROPERTY(QRect screenGeometry READ screenGeometry WRITE setScreenGeometry NOTIFY screenGeometryChanged)
+    Q_PROPERTY(int screen READ screen WRITE setScreen NOTIFY screenChanged)
     Q_PROPERTY(QString activity READ activity WRITE setActivity NOTIFY activityChanged)
 
     Q_PROPERTY(bool filterByVirtualDesktop READ filterByVirtualDesktop WRITE setFilterByVirtualDesktop NOTIFY filterByVirtualDesktopChanged)
@@ -169,23 +169,23 @@ public:
     void setVirtualDesktop(int virtualDesktop);
 
     /**
-     * The geometry of the screen used in filtering by screen. Defaults
-     * to a null QRect.
+     * The number of the screen used in filtering by screen. Usually
+     * set to the number of the current screen. Defaults to @c -1.
      *
-     * @see setGeometryScreen
-     * @returns the geometry of the screen used in filtering.
+     * @see setScreen
+     * @returns the number of the screen used in filtering.
      **/
-    QRect screenGeometry() const;
+    int screen() const;
 
     /**
-     * Set the geometry of the screen to use in filtering by screen.
+     * Set the number of the screen to use in filtering by screen.
      *
-     * If set to an invalid QRect, filtering by screen is disabled.
+     * If set to @c -1, filtering by screen is disabled.
      *
-     * @see screenGeometry
-     * @param geometry A screen geometry.
+     * @see screen
+     * @param screen A screen number.
      **/
-    void setScreenGeometry(const QRect &geometry);
+    void setScreen(int screen);
 
     /**
      * The id of the activity used in filtering by activity. Usually
@@ -755,7 +755,7 @@ Q_SIGNALS:
     void launcherListChanged() const;
     void anyTaskDemandsAttentionChanged() const;
     void virtualDesktopChanged() const;
-    void screenGeometryChanged() const;
+    void screenChanged() const;
     void activityChanged() const;
     void filterByVirtualDesktopChanged() const;
     void filterByScreenChanged() const;
diff --git a/libtaskmanager/tasktools.cpp b/libtaskmanager/tasktools.cpp
index 5ca456138..e11850e6e 100644
--- a/libtaskmanager/tasktools.cpp
+++ b/libtaskmanager/tasktools.cpp
@@ -30,8 +30,6 @@ License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 #include <KSharedConfig>
 
 #include <QDir>
-#include <QGuiApplication>
-#include <QScreen>
 
 namespace TaskManager
 {
@@ -241,35 +239,4 @@ bool appsMatch(const QModelIndex &a, const QModelIndex &b)
     return false;
 }
 
-QRect screenGeometry(const QPoint &pos)
-{
-    if (pos.isNull()) {
-        return QRect();
-    }
-
-    const QList<QScreen *> &screens = QGuiApplication::screens();
-    QRect screenGeometry;
-    int shortestDistance = INT_MAX;
-
-    for (int i = 0; i < screens.count(); ++i) {
-        const QRect &geometry = screens.at(i)->geometry();
-
-        if (geometry.contains(pos)) {
-            return geometry;
-        }
-
-        int distance = QPoint(geometry.topLeft() - pos).manhattanLength();
-        distance = qMin(distance, QPoint(geometry.topRight() - pos).manhattanLength());
-        distance = qMin(distance, QPoint(geometry.bottomRight() - pos).manhattanLength());
-        distance = qMin(distance, QPoint(geometry.bottomLeft() - pos).manhattanLength());
-
-        if (distance < shortestDistance) {
-            shortestDistance = distance;
-            screenGeometry = geometry;
-        }
-    }
-
-    return screenGeometry;
-}
-
 }
diff --git a/libtaskmanager/tasktools.h b/libtaskmanager/tasktools.h
index da40f9eb7..122e23201 100644
--- a/libtaskmanager/tasktools.h
+++ b/libtaskmanager/tasktools.h
@@ -101,15 +101,6 @@ TASKMANAGER_EXPORT bool launcherUrlsMatch(const QUrl &a, const QUrl &b, UrlCompa
  * @returns @c true if the model entries belong to the same app.
  **/
 TASKMANAGER_EXPORT bool appsMatch(const QModelIndex &a, const QModelIndex &b);
-
-/**
- * Given global coordinates, returns the geometry of the screen they are
- * on, or the geometry of the screen they are closest to.
- *
- * @param pos Coordinates in global space.
- * @return The geometry of the screen containing pos or closest to pos.
- */
-TASKMANAGER_EXPORT QRect screenGeometry(const QPoint &pos);
 }
 
 #endif
diff --git a/libtaskmanager/waylandtasksmodel.cpp b/libtaskmanager/waylandtasksmodel.cpp
index 5411dfb32..2cbdf188d 100644
--- a/libtaskmanager/waylandtasksmodel.cpp
+++ b/libtaskmanager/waylandtasksmodel.cpp
@@ -315,7 +315,7 @@ QVariant WaylandTasksModel::data(const QModelIndex &index, int role) const
         return window->virtualDesktop();
     } else if (role == IsOnAllVirtualDesktops) {
         return window->isOnAllDesktops();
-    } else if (role == ScreenGeometry) {
+    } else if (role == Screen) {
         // FIXME Implement.
     } else if (role == Activities) {
         // FIXME Implement.
diff --git a/libtaskmanager/xwindowtasksmodel.cpp b/libtaskmanager/xwindowtasksmodel.cpp
index 8f10cae0f..c1e949532 100644
--- a/libtaskmanager/xwindowtasksmodel.cpp
+++ b/libtaskmanager/xwindowtasksmodel.cpp
@@ -39,7 +39,9 @@ License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 #include <QDir>
 #include <QIcon>
 #include <QFile>
+#include <QGuiApplication>
 #include <QRegularExpression>
+#include <QScreen>
 #include <QSet>
 #include <QStandardPaths>
 #include <QTimer>
@@ -88,6 +90,7 @@ public:
     QUrl launcherUrl(WId window, bool encodeFallbackIcon = true);
     QUrl serviceUrl(int pid, const QString &type, const QStringList &cmdRemovals);
     KService::List servicesFromPid(int pid);
+    int screen(WId window);
     QStringList activities(WId window);
     bool demandsAttention(WId window);
 
@@ -375,7 +378,7 @@ void XWindowTasksModel::Private::windowChanged(WId window, NET::Properties prope
 
     if (properties & NET::WMGeometry) {
         wipeInfoCache = true;
-        changedRoles << ScreenGeometry;
+        changedRoles << Screen;
     }
 
     if (properties2 & NET::WM2Activities) {
@@ -773,6 +776,34 @@ KService::List XWindowTasksModel::Private::servicesFromPid(int pid)
     return services;
 }
 
+int XWindowTasksModel::Private::screen(WId window)
+{
+    const QPoint &windowCenter = windowInfo(window)->frameGeometry().center();
+    const QList<QScreen *> &screens = QGuiApplication::screens();
+    int screen = 0;
+    int shortestDistance = INT_MAX;
+
+    for (int i = 0; i < screens.count(); ++i) {
+        const QRect &screenGeomtry = screens.at(i)->geometry();
+
+        if (screenGeomtry.contains(windowCenter)) {
+            return i;
+        }
+
+        int distance = QPoint(screenGeomtry.topLeft() - windowCenter).manhattanLength();
+        distance = qMin(distance, QPoint(screenGeomtry.topRight() - windowCenter).manhattanLength());
+        distance = qMin(distance, QPoint(screenGeomtry.bottomRight() - windowCenter).manhattanLength());
+        distance = qMin(distance, QPoint(screenGeomtry.bottomLeft() - windowCenter).manhattanLength());
+
+        if (distance < shortestDistance) {
+            shortestDistance = distance;
+            screen = i;
+        }
+    }
+
+    return screen;
+}
+
 QStringList XWindowTasksModel::Private::activities(WId window)
 {
     NETWinInfo ni(QX11Info::connection(), window, QX11Info::appRootWindow(), 0, NET::WM2Activities);
@@ -872,8 +903,8 @@ QVariant XWindowTasksModel::data(const QModelIndex &index, int role) const
         return d->windowInfo(window)->desktop();
     } else if (role == IsOnAllVirtualDesktops) {
         return d->windowInfo(window)->onAllDesktops();
-    } else if (role == ScreenGeometry) {
-        return screenGeometry(d->windowInfo(window)->frameGeometry().center());
+    } else if (role == Screen) {
+        return d->screen(window);
     } else if (role == Activities) {
         return d->activities(window);
     } else if (role == IsDemandingAttention) {