diff --git a/src/main.cpp b/src/main.cpp
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -67,6 +67,8 @@
     app.setOrganizationName(QStringLiteral("KDE"));
     app.setWindowIcon(QIcon::fromTheme(QStringLiteral(APP_NAME)));
 
+    app.setAttribute(Qt::AA_UseHighDpiPixmaps, true);
+
     QCommandLineParser options;
     options.addHelpOption();
     options.addVersionOption();
diff --git a/src/progressBox.cpp b/src/progressBox.cpp
--- a/src/progressBox.cpp
+++ b/src/progressBox.cpp
@@ -89,7 +89,7 @@
 ProgressBox::setText(int files)
 {
     m_text = i18np("%1 File", "%1 Files", files);
-    m_textWidth = fontMetrics().width(m_text);
+    m_textWidth = fontMetrics().horizontalAdvance(m_text);
     m_textHeight = fontMetrics().height();
 }
 
@@ -108,15 +108,15 @@
     tick+=16;
 
     for (int i=0; i<PIECES_NUM; i++) {
-        const int size = qMin(width(), height()) * length[i];
-        const QRect rect(width() / 2 - size / 2, height() / 2 - size / 2, size, size);
+        const qreal size = qMin(width(), height()) * length[i];
+        const QRectF rect(width() / 2 - size / 2, height() / 2 - size / 2, size, size);
         int angle = angleFactor[i] + tick*angleFactor[i];
         QRadialGradient gradient(rect.center(), sin(angle/160.0f) * 100);
         gradient.setColorAt(0, QColor::fromHsv(abs(angle/16) % 360 , 160, 255));
         gradient.setColorAt(1, QColor::fromHsv(abs(angle/16) % 360 , 160, 128));
         QBrush brush(gradient);
         paint.setBrush(brush);
-        paint.drawPie(QRect(rect), angle, aLength[i]);
+        paint.drawPie(QRectF(rect), angle, aLength[i]);
     }
 
     paint.translate(0.5, 0.5);
diff --git a/src/radialMap/labels.cpp b/src/radialMap/labels.cpp
--- a/src/radialMap/labels.cpp
+++ b/src/radialMap/labels.cpp
@@ -196,13 +196,13 @@
 
         for (it = list.begin(); it != list.end(); ++it) {
             Label *label = *it;
-            //** bear in mind that text is drawn with QPoint param as BOTTOM left corner of text box
+            //** bear in mind that text is drawn with QPointF param as BOTTOM left corner of text box
             QString string = label->segment->file()->displayName();
             if (varySizes) {
                 font.setPointSize(sizes[label->level]);
             }
             QFontMetrics fontMetrics(font);
-            const int minTextWidth = fontMetrics.width(QStringLiteral("M...")) + LABEL_TEXT_HMARGIN; // Fully elided string
+            const int minTextWidth = fontMetrics.horizontalAdvance(QStringLiteral("M...")) + LABEL_TEXT_HMARGIN; // Fully elided string
 
             const int fontHeight  = fontMetrics.height() + LABEL_TEXT_VMARGIN; //used to ensure label texts don't overlap
             const int lineSpacing = fontHeight / 4;
@@ -237,7 +237,7 @@
             int textY = startY + lineSpacing;
 
             int textX;
-            const int textWidth = fontMetrics.width(string) + LABEL_TEXT_HMARGIN;
+            const int textWidth = fontMetrics.horizontalAdvance(string) + LABEL_TEXT_HMARGIN;
             if (rightSide) {
                 if (startX + minTextWidth > width() || textY < fontHeight || middleX < targetX) {
                     //skip this strut
@@ -271,7 +271,7 @@
                 } else {
                     textX = 0;
                     string = fontMetrics.elidedText(string, Qt::ElideMiddle, startX);
-                    startX = fontMetrics.width(string) + LABEL_TEXT_HMARGIN;
+                    startX = fontMetrics.horizontalAdvance(string) + LABEL_TEXT_HMARGIN;
                 }
             }
 
diff --git a/src/radialMap/map.h b/src/radialMap/map.h
--- a/src/radialMap/map.h
+++ b/src/radialMap/map.h
@@ -27,7 +27,7 @@
 #include <KColorScheme>
 
 #include <QPixmap>
-#include <QRect>
+#include <QRectF>
 #include <QString>
 
 namespace RadialMap {
@@ -40,17 +40,17 @@
     ~Map();
 
     void make(const Folder *, bool = false);
-    bool resize(const QRect&);
+    bool resize(const QRectF&);
 
     bool isNull() const {
         return (m_signature == nullptr);
     }
     void invalidate();
 
-    int height() const {
+    qreal height() const {
         return m_rect.height();
     }
-    int width() const {
+    qreal width() const {
         return m_rect.width();
     }
     QPixmap pixmap() const {
@@ -72,13 +72,14 @@
     const Folder *m_root;
     uint m_minSize;
     QVector<FileSize> m_limits;
-    QRect m_rect;
+    QRectF m_rect;
     uint m_visibleDepth; ///visible level depth of system
     QPixmap m_pixmap;
     int m_ringBreadth;
     uint m_innerRadius;  ///radius of inner circle
     QString m_centerText;
     bool m_summary;
+    qreal m_dpr;
 
     uint MAP_2MARGIN;
 };
diff --git a/src/radialMap/map.cpp b/src/radialMap/map.cpp
--- a/src/radialMap/map.cpp
+++ b/src/radialMap/map.cpp
@@ -203,7 +203,7 @@
     return false;
 }
 
-bool RadialMap::Map::resize(const QRect &newRect)
+bool RadialMap::Map::resize(const QRectF &newRect)
 {
     //there's a MAP_2MARGIN border
 
@@ -222,10 +222,11 @@
         size = minSize;
     }
 
-    //this QRect is used by paint()
+    //this QRectF is used by paint()
     m_rect.setRect(0,0,size,size);
 
-    m_pixmap = QPixmap(m_rect.size());
+    m_pixmap = QPixmap(m_rect.width() * m_dpr, m_rect.height() * m_dpr);
+    m_pixmap.setDevicePixelRatio(m_dpr);
 
     //resize the pixmap
     size += MAP_2MARGIN;
@@ -352,7 +353,7 @@
     KColorScheme scheme(QPalette::Active, KColorScheme::View);
 
     QPainter paint;
-    QRect rect = m_rect;
+    QRectF rect = m_rect;
 
     rect.adjust(MAP_HIDDEN_TRIANGLE_SIZE, MAP_HIDDEN_TRIANGLE_SIZE, -MAP_HIDDEN_TRIANGLE_SIZE, -MAP_HIDDEN_TRIANGLE_SIZE);
     m_pixmap.fill(Qt::transparent);
@@ -381,7 +382,7 @@
 
     //do intelligent distribution of excess to prevent nasty resizing
     if (m_ringBreadth != MAX_RING_BREADTH && m_ringBreadth != MIN_RING_BREADTH) {
-        excess = rect.width() % m_ringBreadth;
+        excess = int(rect.width()) % m_ringBreadth;
         ++step;
     }
 
@@ -405,8 +406,8 @@
             }
 
             //draw arrow head to indicate undisplayed files/directories
-            QPolygon pts(3);
-            QPoint pos, cpos = rect.center();
+            QPolygonF pts;
+            QPointF pos, cpos = rect.center();
             uint a[3] = { segment->start(), segment->length(), 0 };
 
             a[2] = a[0] + (a[1] / 2); //assign to halfway between
@@ -426,9 +427,9 @@
                 }
 
                 sincos(ra, &sinra, &cosra);
-                pos.rx() = cpos.x() + static_cast<int>(cosra * radius);
-                pos.ry() = cpos.y() - static_cast<int>(sinra * radius);
-                pts.setPoint(i, pos);
+                pos.rx() = cpos.x() + cosra * radius;
+                pos.ry() = cpos.y() - sinra * radius;
+                pts << pos;
             }
 
             paint.setBrush(segment->pen());
@@ -440,7 +441,7 @@
             int width = 2;
             pen.setWidth(width);
             paint.setPen(pen);
-            QRect rect2 = rect;
+            QRectF rect2 = rect;
             width /= 2;
             rect2.adjust(width, width, -width, -width);
             paint.drawArc(rect2, segment->start(), segment->length());
diff --git a/src/radialMap/widget.h b/src/radialMap/widget.h
--- a/src/radialMap/widget.h
+++ b/src/radialMap/widget.h
@@ -98,7 +98,7 @@
     void leaveEvent(QEvent*) override;
 
 protected:
-    const Segment *segmentAt(QPoint position) const; //FIXME const reference for a library others can use
+    const Segment *segmentAt(QPointF position) const; //FIXME const reference for a library others can use
     const Segment *rootSegment() const {
         return m_rootSegment;    ///never == 0
     }
@@ -111,7 +111,7 @@
 
     const Folder *m_tree;
     const Segment   *m_focus;
-    QPoint           m_offset;
+    QPointF           m_offset;
     QTimer           m_timer;
     Map              m_map;
     Segment          *m_rootSegment;
diff --git a/src/radialMap/widget.cpp b/src/radialMap/widget.cpp
--- a/src/radialMap/widget.cpp
+++ b/src/radialMap/widget.cpp
@@ -52,6 +52,7 @@
     connect(&m_timer, &QTimer::timeout, this, &Widget::resizeTimeout);
     m_tooltip.setFrameShape(QFrame::StyledPanel);
     m_tooltip.setWindowFlags(Qt::ToolTip | Qt::WindowTransparentForInput);
+    m_map.m_dpr = devicePixelRatioF();
 }
 
 RadialMap::Widget::~Widget()
diff --git a/src/radialMap/widgetEvents.cpp b/src/radialMap/widgetEvents.cpp
--- a/src/radialMap/widgetEvents.cpp
+++ b/src/radialMap/widgetEvents.cpp
@@ -88,9 +88,9 @@
     }
 }
 
-const RadialMap::Segment* RadialMap::Widget::segmentAt(QPoint e) const
+const RadialMap::Segment* RadialMap::Widget::segmentAt(QPointF e) const
 {
-    //determine which segment QPoint e is above
+    //determine which segment QPointF e is above
 
     e -= m_offset;
 
@@ -152,10 +152,10 @@
         return;
     }
 
-    const QRect screenRect = window()->windowHandle()->screen()->availableGeometry();
+    const QRectF screenRect = window()->windowHandle()->screen()->availableGeometry();
 
     QPoint tooltipPosition = e->globalPos() + QPoint(20, 20);
-    QRect tooltipRect(tooltipPosition, m_tooltip.size());
+    QRectF tooltipRect(tooltipPosition, m_tooltip.size());
 
     // Same content as before
     if (m_focus == oldFocus) {
@@ -224,7 +224,7 @@
     int tooltipHeight = 0;
     for (const QString &part : string.split(QLatin1Char('\n'))) {
         tooltipHeight += fontMetrics.height();
-        tooltipWidth = qMax(tooltipWidth, fontMetrics.width(part));
+        tooltipWidth = qMax(tooltipWidth, fontMetrics.horizontalAdvance(part));
     }
     tooltipWidth += 10;
     tooltipHeight += 10;