利用widget重构parkinglot

Road.h

@@ -0,0 +1,15 @@
+#pragma once
+#include <QWidget>
+class Road: public QWidget
+{
+	Q_OBJECT
+public:
+	enum direction{ horizontal, vertical};
+	Road(QWidget* parent, const int length, direction dir);
+	void paintEvent(QPaintEvent* event) override;
+	~Road();
+private:
+	const int length;
+	direction dir;
+};
+