diff --git a/src/gui/qgsgradientstopeditor.cpp b/src/gui/qgsgradientstopeditor.cpp
index 122c48d47be..5dee0a82926 100644
--- a/src/gui/qgsgradientstopeditor.cpp
+++ b/src/gui/qgsgradientstopeditor.cpp
@@ -26,14 +26,6 @@
 #endif
 #include <QMouseEvent>
 
-#define MARKER_WIDTH 11
-#define MARKER_HEIGHT 14
-#define MARKER_GAP 1.5
-#define MARGIN_BOTTOM ( MARKER_HEIGHT + 2 )
-#define MARGIN_X ( MARKER_WIDTH / 2 )
-#define FRAME_MARGIN 2
-#define CLICK_THRESHOLD ( MARKER_WIDTH / 2 + 3 )
-
 QgsGradientStopEditor::QgsGradientStopEditor( QWidget *parent, QgsGradientColorRamp *ramp )
   : QWidget( parent )
 {
@@ -106,7 +98,7 @@ void QgsGradientStopEditor::paintEvent( QPaintEvent *event )
   painter.setBrush( checkBrush );
   painter.setPen( Qt::NoPen );
 
-  QRect box( frameRect.x() + FRAME_MARGIN, frameRect.y() + FRAME_MARGIN, frameRect.width() - 2 * FRAME_MARGIN, frameRect.height() - 2 * FRAME_MARGIN );
+  QRect box( frameRect.x() + FRAME_MARGIN_PX, frameRect.y() + FRAME_MARGIN_PX, frameRect.width() - 2 * FRAME_MARGIN_PX, frameRect.height() - 2 * FRAME_MARGIN_PX );
 
   painter.drawRect( box );
 
@@ -395,7 +387,7 @@ void QgsGradientStopEditor::keyPressEvent( QKeyEvent *e )
     if ( selectedStopIsMovable() )
     {
       // calculate offset corresponding to 1 px
-      double offsetDiff = pointToRelativePosition( rect().x() + MARGIN_X + FRAME_MARGIN + 2 ) - pointToRelativePosition( rect().x() + MARGIN_X + FRAME_MARGIN + 1 );
+      double offsetDiff = pointToRelativePosition( rect().x() + MARGIN_X + FRAME_MARGIN_PX + 2 ) - pointToRelativePosition( rect().x() + MARGIN_X + FRAME_MARGIN_PX + 1 );
 
       if ( e->modifiers() & Qt::ShiftModifier )
         offsetDiff *= 10.0;
@@ -447,8 +439,8 @@ void QgsGradientStopEditor::drawStopMarker( QPainter &painter, QPoint topMiddle,
 
 double QgsGradientStopEditor::pointToRelativePosition( int x ) const
 {
-  int left = rect().x() + MARGIN_X + FRAME_MARGIN;
-  int right = left + rect().width() - 2 * MARGIN_X - 2 * FRAME_MARGIN;
+  int left = rect().x() + MARGIN_X + FRAME_MARGIN_PX;
+  int right = left + rect().width() - 2 * MARGIN_X - 2 * FRAME_MARGIN_PX;
 
   if ( x <= left )
     return 0;
@@ -460,8 +452,8 @@ double QgsGradientStopEditor::pointToRelativePosition( int x ) const
 
 int QgsGradientStopEditor::relativePositionToPoint( double position ) const
 {
-  int left = rect().x() + MARGIN_X + FRAME_MARGIN;
-  int right = left + rect().width() - 2 * MARGIN_X - 2 * FRAME_MARGIN;
+  int left = rect().x() + MARGIN_X + FRAME_MARGIN_PX;
+  int right = left + rect().width() - 2 * MARGIN_X - 2 * FRAME_MARGIN_PX;
 
   if ( position <= 0 )
     return left;
diff --git a/src/gui/qgsgradientstopeditor.h b/src/gui/qgsgradientstopeditor.h
index 83e79c0014c..6f091acedfa 100644
--- a/src/gui/qgsgradientstopeditor.h
+++ b/src/gui/qgsgradientstopeditor.h
@@ -200,6 +200,14 @@ class GUI_EXPORT QgsGradientStopEditor : public QWidget
 
     //! Polygon for stop triangle marker inner
     QPolygonF sInnerTriangle;
+
+    static constexpr int FRAME_MARGIN_PX = 2;
+    static constexpr int MARKER_WIDTH = 11;
+    static constexpr int MARKER_HEIGHT = 14;
+    static constexpr double MARKER_GAP = 1.5;
+    static constexpr int MARGIN_BOTTOM = MARKER_HEIGHT + 2;
+    static constexpr int MARGIN_X = MARKER_WIDTH / 2;
+    static constexpr int CLICK_THRESHOLD = MARKER_WIDTH / 2 + 3;
 };
 
 #endif // QGSGRADIENTSTOPEDITOR_H