diff --git a/ParkingLotWidget.cpp b/ParkingLotWidget.cpp
index d341c99..1a64fdc 100644
--- a/ParkingLotWidget.cpp
+++ b/ParkingLotWidget.cpp
@@ -80,7 +80,7 @@ QBoxLayout * ParkingLotWidget::parseLayout(const QDomElement & element)
 	else
 		layout = new QVBoxLayout;
     layout->setSizeConstraint(QLayout::SetFixedSize);
-    qDebug() << "处理" << element.tagName();
+    // qDebug() << "处理" << element.tagName();
 	
 	QDomElement child = element.firstChild().toElement();
 	while (!child.isNull())
@@ -88,7 +88,7 @@ QBoxLayout * ParkingLotWidget::parseLayout(const QDomElement & element)
 		QString name = child.tagName();
 		if (name == "road")
 		{
-            qDebug() << "处理road";
+            // qDebug() << "处理road";
             Road *r;
 			const int l = child.attribute("length").toInt();
 			if (child.attribute("direction") == "vertical")
@@ -107,7 +107,7 @@ QBoxLayout * ParkingLotWidget::parseLayout(const QDomElement & element)
 		}
 		else if (name == "room")
 		{
-            qDebug() << "处理room";
+            // qDebug() << "处理room";
 			const auto n = child.attribute("number", "1").toInt();
 			layout->addLayout(ParkingSpaceWidget::makeParkingSapceGroup(
 				this, child.attribute("direction"), n, child.attribute("expendDirection")));
@@ -115,7 +115,7 @@ QBoxLayout * ParkingLotWidget::parseLayout(const QDomElement & element)
 		else if ((name.at(0) == 'v' ||  name.at(0) == 'h' )&& name.contains("Layout"))
 			layout->addLayout(parseLayout(child));
         else if (name == "space") {
-            qDebug() << "处理space";
+            // qDebug() << "处理space";
             QSpacerItem* sw = new QSpacerItem(0, 0);
             if (element.tagName() == "hLayout")
                 sw->changeSize(child.attribute("length").toInt(), 0, QSizePolicy::Fixed, QSizePolicy::Minimum);
@@ -123,7 +123,7 @@ QBoxLayout * ParkingLotWidget::parseLayout(const QDomElement & element)
                 sw->changeSize(0, child.attribute("length").toInt(), QSizePolicy::Minimum, QSizePolicy::Fixed);
             layout->addSpacerItem(sw);
         } else if (name == "boundary") {
-            qDebug() << "处理boundary";
+            // qDebug() << "处理boundary";
             int l = child.attribute("length").toInt();
             Boundary *b = new Boundary(child.attribute("direction"), l, this);
             layout->addWidget(b);
@@ -152,3 +152,9 @@ const QVector<Road *>& ParkingLotWidget::getRoadList() const
 {
     return m_roadList;
 }
+
+void ParkingLotWidget::showMarginSlot(bool b)
+{
+    // qDebug() << "Parkinglot Widget: show margin " << b;
+    emit showMargain(b);
+}
diff --git a/ParkingLotWidget.h b/ParkingLotWidget.h
index 8737c2c..b46a92b 100644
--- a/ParkingLotWidget.h
+++ b/ParkingLotWidget.h
@@ -22,6 +22,7 @@ public:
     QString getName() const;
     const QVector<ParkingSpaceWidget *>& getSpaceList() const;
     const QVector<Road *>& getRoadList() const;
+    void showMarginSlot(bool b);
 
 private:
     QVector<ParkingSpaceWidget*> m_spaceList;
@@ -30,6 +31,9 @@ private:
 	QBoxLayout *parseLayout(const QDomElement& element);
 	QBoxLayout *layout = nullptr;
     QString name;
+
+signals:
+    void showMargain(bool);
 };
 
 #endif
diff --git a/ParkingSpaceWidget.cpp b/ParkingSpaceWidget.cpp
index 7f0cbc1..650708d 100644
--- a/ParkingSpaceWidget.cpp
+++ b/ParkingSpaceWidget.cpp
@@ -5,6 +5,7 @@
 #include <QLabel>
 #include <QEvent>
 #include <QHoverEvent>
+#include <QObject>
 #include "ParkingLotWidget.h"
 
 ParkingSpaceWidget::ParkingSpaceWidget(ParkingLotWidget* parent, const QString &dir): QWidget(parent)
@@ -37,6 +38,10 @@ ParkingSpaceWidget::ParkingSpaceWidget(ParkingLotWidget* parent, const QString &
 	}
     number = parent->addSpace(this);
     setToolTip(QString::number(number));
+    QObject::connect(parent, &ParkingLotWidget::showMargain, [this](bool b){
+        this->m_showMargin = b;
+        update();
+    });
 }
 
 QBoxLayout *ParkingSpaceWidget::makeParkingSapceGroup(ParkingLotWidget* parent, const QString& dir, int n, const QString & expend)
@@ -88,9 +93,11 @@ void ParkingSpaceWidget::paintEvent(QPaintEvent *)
 	painter.drawRect(0, 0, 60, 5);
 	painter.drawRect(0, 5, 10, 35);
 	painter.drawRect(10, 35, 50, 5);
-	/*painter.setPen(Qt::blue);
-	painter.setBrush(Qt::NoBrush);
-	painter.drawRect(0, 0, this->width() - 1, this->height() - 1);*/
+    if (m_showMargin) {
+        painter.setPen(Qt::blue);
+        painter.setBrush(Qt::NoBrush);
+        painter.drawRect(0, 0, width() - 1, height() - 1);
+    }
 
     //painter.restore();
     //painter.setPen(Qt::black);
diff --git a/ParkingSpaceWidget.h b/ParkingSpaceWidget.h
index 414b767..f63dc31 100644
--- a/ParkingSpaceWidget.h
+++ b/ParkingSpaceWidget.h
@@ -4,6 +4,7 @@
 #include <QLayout>
 #include <QLabel>
 #include "ParkingLotWidget.h"
+#include "MyEvent.h"
 class ParkingLotWidget;
 
 class ParkingSpaceWidget: public QWidget
@@ -20,6 +21,7 @@ public:
 protected:
     void paintEvent(QPaintEvent* ) override;
 private:
+    bool m_showMargin = false;
     int number;
 	direction dir;
     // QLabel *m_float_window = nullptr;
diff --git a/Road.cpp b/Road.cpp
index fe7afa8..b196e85 100644
--- a/Road.cpp
+++ b/Road.cpp
@@ -21,6 +21,10 @@ Road::Road(ParkingLotWidget* parent, const int length, const direction dir)
 	}
 	// setContentsMargins(0, 0, 0, 0);
     number = parent->addRoad(this);
+    QObject::connect(parent, &ParkingLotWidget::showMargain, [this](bool b){
+        this->m_showMargin = b;
+        update();
+    });
 }
 
 void Road::paintEvent(QPaintEvent * event)
@@ -44,9 +48,11 @@ void Road::paintEvent(QPaintEvent * event)
 			y += 50;
 		}
 	}
-    //painter.setPen(Qt::red);
-    //painter.setBrush(Qt::NoBrush);
-    //painter.drawRect(0, 0, width() - 1, height() - 1);
+    if (m_showMargin) {
+        painter.setPen(Qt::blue);
+        painter.setBrush(Qt::NoBrush);
+        painter.drawRect(0, 0, width() - 1, height() - 1);
+    }
 }
 
 Road::~Road()
diff --git a/Road.h b/Road.h
index 0ef4b8e..eb1a81b 100644
--- a/Road.h
+++ b/Road.h
@@ -28,5 +28,6 @@ private:
     uint number;
     Action action = none;
     short actionPos = 0;  // 1为左上端，2为右下端
+    bool m_showMargin = false;
 };
 
diff --git a/monitor.cpp b/monitor.cpp
index 7259c6c..388da7b 100644
--- a/monitor.cpp
+++ b/monitor.cpp
@@ -18,7 +18,8 @@ Monitor::Monitor(QWidget *parent) :
     QObject::connect(pk, &ParkingLotManager::setCapacity, ui->capacity, &QLabel::setText);
     QObject::connect(pk, &ParkingLotManager::setLoad, ui->load, &QLabel::setText);
     QObject::connect(pk, &ParkingLotManager::setLayerName, ui->layerName, &QLabel::setText);
-
+    QObject::connect(ui->showMargin, &QCheckBox::toggled, pk, &ParkingLotManager::showMargin);
+    QObject::connect(ui->showGraph, &QCheckBox::toggled, pk, &ParkingLotManager::showGraph);
     QObject::connect(ui->drawPath, &QPushButton::clicked, [=](){
         pk->drawPath(ui->placeNum1->text().toInt(), ui->placeNum2->text().toInt());
     });
diff --git a/monitor.ui b/monitor.ui
index c7c1c46..0b331f3 100644
--- a/monitor.ui
+++ b/monitor.ui
@@ -34,7 +34,7 @@
   <widget class="QWidget" name="horizontalLayoutWidget">
    <property name="geometry">
     <rect>
-     <x>13</x>
+     <x>10</x>
      <y>10</y>
      <width>1061</width>
      <height>881</height>
@@ -67,7 +67,7 @@
      </widget>
     </item>
     <item>
-     <layout class="QVBoxLayout" name="verticalLayout" stretch="0,0,0,0,0,0,0,0,0,0,0">
+     <layout class="QVBoxLayout" name="verticalLayout" stretch="0,0,0,0,0,0,0,0,0,0,0,0,0">
       <property name="sizeConstraint">
        <enum>QLayout::SetDefaultConstraint</enum>
       </property>
@@ -243,6 +243,31 @@
         </property>
        </spacer>
       </item>
+      <item>
+       <widget class="QLabel" name="label_3">
+        <property name="text">
+         <string>DEBUG：</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_7">
+        <item>
+         <widget class="QCheckBox" name="showMargin">
+          <property name="text">
+           <string>显示布局边界</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QCheckBox" name="showGraph">
+          <property name="text">
+           <string>显示图</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
       <item>
        <layout class="QHBoxLayout" name="horizontalLayout_6">
         <item>
diff --git a/parkingLotManager.cpp b/parkingLotManager.cpp
index 59c262f..73a6027 100644
--- a/parkingLotManager.cpp
+++ b/parkingLotManager.cpp
@@ -2,11 +2,13 @@
 #include "ParkingLotWidget.h"
 #include "ParkingSpaceWidget.h"
 #include "path.h"
+#include "MyEvent.h"
 #include <QDebug>
 #include <QPainter>
 #include <QPoint>
 #include <QRect>
 #include <QGraphicsScene>
+#include <QApplication>
 
 ParkingLotManager::ParkingLotManager(QObject* objectParent, QGraphicsScene* scene):
     QObject(objectParent), m_scene(scene)
@@ -24,7 +26,7 @@ ParkingLotManager::ParkingLotManager(QObject* objectParent, QGraphicsScene* scen
     }
     m_cars.resize(m_num_of_layer);  // 停在每一层的车
     m_waitting.resize(m_num_of_entry); // 在每个入口等待的车
-    for (uint i = 0; i < m_num_of_layer; i++) {
+    for (uint i = 0; i < m_num_of_layer; i++) {  // 全部为饿汉模式
         ParkingLotWidget* widget = new ParkingLotWidget(Q_NULLPTR, m_xml_path.at(i));  // 生成一个widget
         // m_pixmap.push_back(new QPixmap(widget->size()));  // 创建一层的pixmap
         // qDebug() << "widget size x=" << widget->size().width() << " y=" <<widget->size().height();
@@ -36,10 +38,9 @@ ParkingLotManager::ParkingLotManager(QObject* objectParent, QGraphicsScene* scen
         widget->hide();
         m_widgets.push_back(widget);
         m_scene->addWidget(widget);
-        if (i == 1)
-            m_graph.push_back(new ParkingLotGraph(widget));
-        else
-            m_graph.push_back(nullptr);
+        m_graph.push_back(new ParkingLotGraph(widget));
+        m_graph_pixmap.push_back(new QGraphicsPixmapItem(*m_graph.last()->getPixmap()));
+        QObject::connect(this, &ParkingLotManager::showMarginSignal, widget, &ParkingLotWidget::showMarginSlot);
     }
 }
 
@@ -52,11 +53,15 @@ void ParkingLotManager::showParkingLot(uint pos)
     for (uint i = 0; i < m_num_of_layer; i++)
         m_widgets.at(i)->hide();
     m_widgets.at(pos)->show();
+    for (QGraphicsPixmapItem* p: m_graph_pixmap)
+        if (m_scene->items().contains(p))
+            m_scene->removeItem(p);
+    if (m_showGraph) {
+        m_scene->addItem(m_graph_pixmap.at(m_current_floor));
+    }
     emit setCapacity(QString::number(m_capacity.at(pos)));
     emit setLoad(QString::number(m_capacity.at(pos) - m_num_of_cars.at(pos)));
     emit setLayerName(m_name.at(pos));
-//    if (pos == 1)
-//        m_graph[1]->paint(m_scene);
 }
 
 void ParkingLotManager::showParkingLot()
@@ -101,3 +106,22 @@ void ParkingLotManager::drawPath(int n1, int n2)
         m_scene->addLine(line);
     }
 }
+
+void ParkingLotManager::showMargin(bool enable)
+{
+    // qDebug() << "show margin" << enable;
+    emit showMarginSignal(enable);
+}
+
+void ParkingLotManager::showGraph(bool enable)
+{
+    // qDebug() << "show graph" << enable;
+    m_showGraph = enable;
+    showParkingLot();
+}
+
+void ParkingLotManager::clearScene()
+{
+    qDebug() << "清空scene";
+    m_scene->clear();
+}
diff --git a/parkingLotManager.h b/parkingLotManager.h
index 612027b..efa90c6 100644
--- a/parkingLotManager.h
+++ b/parkingLotManager.h
@@ -20,6 +20,9 @@ public:
     void showUpStairFloor(void);
     void drawPath(int n1, int n2);
 
+    void showMargin(bool enable);
+    void showGraph(bool enable);
+
 private:
     QGraphicsScene* m_scene;
     QVector<ParkingLotWidget*> m_widgets;  // 每一层的widget
@@ -28,17 +31,21 @@ private:
     QVector<QVector<Car*> > m_cars;  // 停在每一层的车
     QVector<QQueue<Car*> >m_waitting; // 在每个入口等待的车
     QVector<ParkingLotGraph*> m_graph;
+    QVector<QGraphicsPixmapItem*> m_graph_pixmap;
     QStringList m_xml_path;  // 每一层xml文件地址
     QStringList m_name;  // 每一层的名字
     const uint m_num_of_layer = 2;  // 总层数
     const uint m_num_of_entry = 2;  // 入口数
     uint m_current_floor = 1; // 当前楼层，默认为1楼（按照从下往上递增，值与实际楼层无关）
+    bool m_showGraph = false;  // 是否显示图
+    void clearScene();
 signals:
     void enableUpButton(bool);
     void enableDownButton(bool);
     void setCapacity(const QString&);
     void setLoad(const QString&);
     void setLayerName(const QString&);
+    void showMarginSignal(bool);
 };
 
 #endif // PARKINGLOTITEM_H
diff --git a/parkinglot_f1.xml b/parkinglot_f1.xml
index d7ec0d0..6055f8b 100644
--- a/parkinglot_f1.xml
+++ b/parkinglot_f1.xml
@@ -45,7 +45,7 @@
 		<hLayout>
 			<space length="580"/>
 			<boundary length="100" direction="vertical" />
-			<road length="100" direction="vertical" action="entry" actionPos="1"/>
+			<road length="100" direction="vertical" action="entry" actionPos="2"/>
 			<boundary length="100" direction="vertical" />
 		</hLayout>
 	</vLayout>
diff --git a/parkinglotgraph.cpp b/parkinglotgraph.cpp
index b4dcdab..a859ef4 100644
--- a/parkinglotgraph.cpp
+++ b/parkinglotgraph.cpp
@@ -7,6 +7,7 @@
 #include <QDebug>
 #include <QWidget>
 #include <queue>
+#include <QPainter>
 
 bool inRect(const QWidget* r, const QPoint& p) {
     if (p.x() > r->pos().x() && p.x() < r->pos().x() + r->width() &&
@@ -252,10 +253,49 @@ Path *ParkingLotGraph::finaPath(ParkingLotGraph::Node::Type t1, int n1, ParkingL
 
 ParkingLotGraph::~ParkingLotGraph()
 {
-    for (Node* n: m_spaceList)
-        delete n;
-    for (Node* n: m_roadNodeList)
+    for (Node* n: m_all)
         delete n;
+    delete m_pixmap;
+}
+
+QPixmap *ParkingLotGraph::getPixmap()
+{
+    if (m_pixmap == nullptr)
+        generatePixmap();
+    return m_pixmap;
+}
+
+void ParkingLotGraph::generatePixmap()
+{
+    m_pixmap = new QPixmap(pk->size());
+    m_pixmap->fill(Qt::transparent);
+    QPainter painter(m_pixmap);
+    QVector<Node*> vis(m_spaceList.size() + m_roadNodeList.size());
+    QStack<Node*> stack;
+    painter.setPen(Qt::red);
+//    for (int i = 0; i < m_roadNodeList.size(); i++) {
+//        qDebug() << i << "  " << m_roadNodeList.at(i)->adjacent.size();
+//    }
+    stack.push(m_spaceList.first());
+    while (!stack.empty()) {
+        Node* n = stack.pop();
+        if (vis.indexOf(n) != -1)
+            continue;
+        vis.push_back(n);
+        // qDebug() << "关联节点共有" << QString::number(n->adjacent.size());
+        if (n->action != Road::Action::none) {
+            painter.setBrush(Qt::red);
+            painter.drawEllipse(n->data.x(), n->data.y(), 5, 5);
+            painter.setBrush(Qt::NoBrush);
+        } else
+            painter.drawEllipse(n->data.x(), n->data.y(), 5, 5);
+        for(Node* adj: n->adjacent) {
+            if (vis.indexOf(adj) != -1)
+                continue;
+            stack.push(adj);
+            painter.drawLine(n->data.x(), n->data.y(), adj->data.x(), adj->data.y());
+        }
+    }
 }
 
 
diff --git a/parkinglotgraph.h b/parkinglotgraph.h
index 35d1ae0..ff41ac2 100644
--- a/parkinglotgraph.h
+++ b/parkinglotgraph.h
@@ -8,6 +8,7 @@
 #include <QPoint>
 #include <QGraphicsScene>
 #include <QMap>
+#include <QPixmap>
 #include "Road.h"
 
 class ParkingLotGraph
@@ -38,15 +39,20 @@ public:
         return no;
     }
     void paint(QGraphicsScene* scene);
+
     Path* finaPath(Node::Type t1, int n1, Node::Type t2, int n2);
     uint getNodeId(Node::Type t, int n);
     ~ParkingLotGraph();
+    QPixmap *getPixmap();
+
 private:
-   QVector<Node* > m_all;
-   QVector<Node* > m_spaceList;
-   QVector<Node* > m_roadNodeList;
-   QMap<uint, Node*> m_actionList;
-   const ParkingLotWidget* pk;
+    QVector<Node* > m_all;
+    QVector<Node* > m_spaceList;
+    QVector<Node* > m_roadNodeList;
+    QMap<uint, Node*> m_actionList;
+    QPixmap* m_pixmap = nullptr;
+    void generatePixmap();
+    const ParkingLotWidget* pk;
 };
 
 #endif // PARKINGLOTGRAPH_H