using qpen

renderarea.cpp

@@ -18,7 +18,7 @@ void RenderArea::paintEvent(QPaintEvent* event)
 	painter.setRenderHint(QPainter::Antialiasing,true);
 
 	painter.setBrush(mBackgroundColour);
-	painter.setPen(mShapeColour);
+	painter.setPen(mPen);
 
 	painter.drawRect(this->rect());
 
@@ -50,9 +50,10 @@ void RenderArea::paintEvent(QPaintEvent* event)
 RenderArea::RenderArea(QWidget *parent) :
 	QWidget{parent},
 	mBackgroundColour{36,35,35},
-	mShapeColour{251,250,250},
+	mPen{QColor{251,250,250}},
 	mShape{Astroid}
 {
+	mPen.setWidth(2);
 	OnShapeChanged();
 }
 

renderarea.h

@@ -2,6 +2,7 @@
 #define RENDERAREA_H
 
 #include <QWidget>
+#include <QPen>
 
 class RenderArea : public QWidget
 {
@@ -27,8 +28,8 @@ class RenderArea : public QWidget
 		void setBackgroundColor(QColor color) { mBackgroundColour = color; }
 		QColor backgroundColor() const { return mBackgroundColour; }
 
-		void setShapeColor(QColor color) { mShapeColour = color; }
-		QColor shapeColor() const { return mShapeColour; }
+		void setShapeColor(QColor color) { mPen.setColor(color); }
+		QColor shapeColor() const { return mPen.color(); }
 
 		void setShape(ShapesType shape) { mShape = shape; OnShapeChanged(); }
 		ShapesType shape() const { return mShape; }
@@ -61,8 +62,9 @@ class RenderArea : public QWidget
 		QPointF ComputeEllipse(double t);
 		QPointF ComputeFancy(double t);
 		QPointF ComputeStarfish(double t);
-		QColor mBackgroundColour,mShapeColour;
+		QColor mBackgroundColour;
 		ShapesType mShape;
+		QPen mPen;
 		double mScale,mIntervalLenght;
 		int mStepCount;
 };