1 files changed, 69 insertions, 0 deletions
diff --git a/qtmips_gui/coreview/adder.cpp b/qtmips_gui/coreview/adder.cpp
new file mode 100644
index 0000000..cd227ab
--- /dev/null
+++ b/qtmips_gui/coreview/adder.cpp
@@ -0,0 +1,69 @@
+#include "adder.h"
+#include <cmath>
+
+using namespace coreview;
+
+//////////////////////
+#define WIDTH 13
+#define HEIGHT 40
+#define DENT 3
+#define PENW 1
+//////////////////////
+
+Adder::Adder() : QGraphicsItem(nullptr), plus("+", this) {
+    QFont font;
+    font.setPointSize(7);
+    plus.setFont(font);
+    QRectF plus_box = plus.boundingRect();
+    plus.setPos(DENT + (WIDTH-DENT)/2 - plus_box.width()/2, HEIGHT/2 - plus_box.height()/2);
+
+    con_in_a = new Connector(0);
+    con_in_b = new Connector(0);
+    con_out = new Connector(M_PI);
+
+    setPos(x(), y()); // set connector's position
+}
+
+Adder::~Adder() {
+    delete con_in_a;
+    delete con_in_b;
+    delete con_out;
+}
+
+QRectF Adder::boundingRect() const {
+    return QRectF(-PENW / 2, -PENW / 2, WIDTH + PENW, HEIGHT + PENW);
+}
+
+void Adder::paint(QPainter *painter, const QStyleOptionGraphicsItem *option __attribute__((unused)), QWidget *widget __attribute__((unused))) {
+    const QPointF poly[] = {
+        QPointF(0, 0),
+        QPointF(WIDTH, WIDTH),
+        QPointF(WIDTH, HEIGHT - WIDTH),
+        QPointF(0, HEIGHT),
+        QPointF(0, (HEIGHT/2) + DENT),
+        QPointF(DENT, HEIGHT / 2),
+        QPointF(0, (HEIGHT / 2) - DENT)
+    };
+    painter->drawPolygon(poly, sizeof(poly) / sizeof(QPointF));
+}
+
+void Adder::setPos(qreal x, qreal y) {
+    QGraphicsItem::setPos(x, y);
+
+    qreal off = ((HEIGHT/2) - DENT) / 2;
+    con_in_a->setPos(x, y + off);
+    con_in_b->setPos(x, y + HEIGHT - off);
+    con_out->setPos(x + WIDTH, y + HEIGHT/2);
+}
+
+const Connector *Adder::connector_in_a() const {
+    return con_in_a;
+}
+
+const Connector *Adder::connector_in_b() const {
+    return con_in_b;
+}
+
+const Connector *Adder::connector_out() const {
+    return con_out;
+}