feat: add background grid

src/gui/network/Network.cpp

@@ -8,9 +8,11 @@ Network::Network(QWidget* parent)
 {
 
     mainLayout_ = new QVBoxLayout(parent);
+    mainLayout_->setContentsMargins(0,0,0,0);
 
     this->setLayout(mainLayout_); 
 
+
     NetworkGraphicsScene* scene = new NetworkGraphicsScene();
     NetworkGraphicsView* view = new NetworkGraphicsView(parent, scene);
     

src/gui/network/NetworkGraphicsScene.cpp

@@ -9,8 +9,44 @@ NetworkGraphicsScene::NetworkGraphicsScene()
 {
     sceneWidth_ = 64000;
     sceneHeight_ = 64000;
+    gridSize_ = 20;
 
     setSceneRect(sceneWidth_/-2.0f, sceneHeight_/-2.0f, sceneWidth_, sceneHeight_);
     
+    setBackgroundBrush(QColor("#1b1b1b"));
 }
 
+void NetworkGraphicsScene::drawBackground(QPainter *painter, const QRectF &rect)
+{
+    QGraphicsScene::drawBackground(painter, rect);
+
+
+    int top = ceil(rect.top());
+    int bottom = floor(rect.bottom());
+    int left = floor(rect.left());
+    int right = ceil(rect.right());
+
+    std::cout << "top: " << top << "\n";
+    std::cout << "bottom: " << bottom << "\n";
+    std::cout << "left: " << left << "\n";
+    std::cout << "right: " << right << "\n";
+
+    QPen gridPen(QColor("#323232"));
+
+    painter->setPen(gridPen);
+
+    QList<QLine> lines;
+
+    for (int y = top - (top % gridSize_); y <= bottom; y += gridSize_) {
+        lines.append(QLine(left, y, right, y));
+    }
+
+    for (int x = left - (left % gridSize_); x <= right; x += gridSize_) {
+        lines.append(QLine(x, bottom, x, top));
+    }
+
+    painter->drawLines(lines);
+
+}
+
+

src/gui/network/NetworkGraphicsScene.h

@@ -10,5 +10,7 @@ public:
 private:
     uint sceneWidth_;
     uint sceneHeight_;
+    uint gridSize_;
 protected:
+    void drawBackground(QPainter *painter, const QRectF &rect) override;
 };

src/gui/network/NetworkGraphicsView.cpp

@@ -10,16 +10,32 @@ NetworkGraphicsView::NetworkGraphicsView(QWidget *parent, QGraphicsScene* scene)
 {
     setScene(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()
+{
+    // zoom from mouse
+    setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
+    // disable scroll bars
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+    setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform | QPainter::TextAntialiasing);
+    //
+    setViewportUpdateMode(ViewportUpdateMode::FullViewportUpdate);
 }
 
 

src/gui/network/NetworkGraphicsView.h

@@ -10,6 +10,7 @@ public:
     NetworkGraphicsView(QWidget *parent = nullptr, QGraphicsScene* scene = nullptr);
 private:
     QPointF panStartPos;
+    void initUI();
 
 protected:
     void mouseMoveEvent(QMouseEvent *mouseEvent) override;