runable version

cars.cpp

@@ -4,14 +4,33 @@
 
 Cars::Cars(QWidget *parent) : QWidget(parent)
 {
-    m_color = Color(rand() % 3);
+    Cars(Color(rand() % 3), parent);
+}
+
+Cars::Cars(Cars::Color color, QWidget *parent) : QWidget(parent)
+{
+    m_color = color;
     resize(200, 130);
+    switch (m_color) {
+    case Pink:
+        m_pixmap = QPixmap(":/cars/pink");
+        break;
+    case Red:
+        m_pixmap = QPixmap(":/cars/red");
+        break;
+    case Yellow:
+        m_pixmap = QPixmap(":/cars/yellow");
+        break;
+    default:
+        m_pixmap = QPixmap(":/cars/red");
+        break;
+    }
 }
 
 void Cars::paintEvent(QPaintEvent *event) {
     QPainter painter(this);
-    QPixmap pix(":/cars/yellow");
-    painter.drawPixmap(0, 0, 200, 130, pix);
+    painter.drawPixmap(0, 0, 200, 130, m_pixmap);
     painter.setPen(QPen(Qt::red, 5));
     painter.drawRect(0, 0, 200, 130);
+    event->ignore();
 }