feat: add node graphic item

CMakeLists.txt

@@ -22,6 +22,7 @@ qt_add_executable(${AppExec}
     src/gui/network/NetworkGraphicsView.cpp
     src/gui/network/NetworkGraphicsScene.cpp
     src/gui/network/Network.cpp
+    src/gui/network/NodeGraphic.cpp
 )
 
 target_link_libraries(${AppExec} PRIVATE Qt6::Core Qt6::Widgets)

src/gui/network/Network.cpp

@@ -1,8 +1,10 @@
 #include "gui/network/Network.h"
 #include "gui/network/NetworkGraphicsView.h"
 #include "gui/network/NetworkGraphicsScene.h"
+#include "gui/network/NodeGraphic.h"
 #include <qboxlayout.h>
 #include <QPushButton>
+#include <QGraphicsItem>
 
 Network::Network(QWidget* parent)
 {
@@ -15,6 +17,21 @@ Network::Network(QWidget* parent)
 
     NetworkGraphicsScene* scene = new NetworkGraphicsScene();
     NetworkGraphicsView* view = new NetworkGraphicsView(parent, scene);
+
+    QPen greenPen = QPen(Qt::green);
+    greenPen.setWidth(6);
+
+    auto* rect1 = scene->addRect(50, 50, 100, 100, greenPen);
+    rect1->setFlag(QGraphicsItem::ItemIsMovable);
+
+    auto* rect2 = scene->addRect(80, 120, 100, 100, greenPen);
+    rect2->setFlag(QGraphicsItem::ItemIsMovable);
+
+    auto* rect3 = scene->addRect(80, -120, 100, 100, greenPen);
+    rect3->setFlag(QGraphicsItem::ItemIsMovable);
+
+    NodeGraphic* node1 = new NodeGraphic();
+    scene->addItem(node1);
     
     mainLayout_->addWidget(view);
 }

src/gui/network/NetworkGraphicsScene.cpp

@@ -9,7 +9,7 @@ NetworkGraphicsScene::NetworkGraphicsScene()
 {
     sceneWidth_ = 64000;
     sceneHeight_ = 64000;
-    gridSize_ = 20;
+    gridSize_ = 40;
 
     setSceneRect(sceneWidth_/-2.0f, sceneHeight_/-2.0f, sceneWidth_, sceneHeight_);
     

src/gui/network/NetworkGraphicsView.cpp

@@ -12,17 +12,7 @@ NetworkGraphicsView::NetworkGraphicsView(QWidget *parent, QGraphicsScene* scene)
 
     initUI();
 
-    QPen greenPen = QPen(Qt::green);
-    greenPen.setWidth(6);
 
-    auto* rect1 = scene->addRect(50, 50, 100, 100, greenPen);
-    rect1->setFlag(QGraphicsItem::ItemIsMovable);
-
-    auto* rect2 = scene->addRect(80, 120, 100, 100, greenPen);
-    rect2->setFlag(QGraphicsItem::ItemIsMovable);
-
-    auto* rect3 = scene->addRect(80, -120, 100, 100, greenPen);
-    rect3->setFlag(QGraphicsItem::ItemIsMovable);
 }
 
 void NetworkGraphicsView::initUI()

src/gui/network/NodeGraphic.cpp

@@ -0,0 +1,9 @@
+#include "gui/network/NodeGraphic.h"
+
+NodeGraphic::NodeGraphic(QGraphicsItem *parent)
+{
+    title_ = new QGraphicsTextItem(this);
+    title_->setPlainText("hello world!");
+    setFlag(QGraphicsItem::ItemIsMovable);
+}
+

src/gui/network/NodeGraphic.h

@@ -0,0 +1,29 @@
+#pragma once
+#include <QGraphicsItem>
+#include <QPainter>
+
+class NodeGraphic
+: public QGraphicsItem
+{
+public:
+    NodeGraphic(QGraphicsItem *parent = nullptr);
+    QRectF boundingRect() const override
+    {
+        qreal penWidth = 6;
+        return QRectF(-10 - penWidth / 2, -10 - penWidth / 2,
+                      20 + penWidth, 20 + penWidth);
+    }
+
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override
+    {
+        QPen greenPen = QPen(Qt::green);
+        greenPen.setWidth(6);
+        painter->setPen(greenPen);
+
+        painter->drawRoundedRect(-10, -10, 20, 20, 5, 5);
+    }
+
+private:
+    QGraphicsTextItem* title_;
+};
+