2 files changed, 143 insertions, 0 deletions
diff --git a/qtmips_gui/coreview/logicblock.cpp b/qtmips_gui/coreview/logicblock.cpp
new file mode 100644
index 0000000..6b5769a
--- /dev/null
+++ b/qtmips_gui/coreview/logicblock.cpp
@@ -0,0 +1,99 @@
+#include "logicblock.h"
+#include <cmath>
+
+using namespace coreview;
+
+//////////////////////
+#define GAP 3
+#define RADIUS GAP
+#define LINE_OFFSET 1
+#define PENW 1
+//////////////////////
+
+LogicBlock::LogicBlock(QString name) {
+    LogicBlock({name});
+}
+
+LogicBlock::LogicBlock(QVector<QString> name) : QGraphicsItem(nullptr) {
+    QFont font;
+    font.setPointSize(7);
+
+    qreal h = 0, w = 0;
+    for (int i = 0; i < name.size(); i++) {
+        QGraphicsSimpleTextItem *t = new QGraphicsSimpleTextItem(name[i], this);
+        t->setFont(font);
+        text.append(t);
+        QRectF t_box = t->boundingRect();
+        t->setPos(-t_box.width()/2, h + LINE_OFFSET);
+        h += t_box.height() + LINE_OFFSET;
+        if (w < t_box.width())
+            w = t_box.width();
+    }
+
+    box = QRectF(-w/2 - GAP, -GAP, w + (2*GAP), h + (2*GAP));
+}
+
+LogicBlock::~LogicBlock() {
+    for (int i = 0; i < connectors.size(); i++)
+        delete connectors[i].con;
+    for (int i = 0; i < text.size(); i++)
+        delete text[i];
+}
+
+QRectF LogicBlock::boundingRect() const {
+    return QRectF(box.x() - PENW/2, box.y() - PENW/2, box.width() + PENW, box.height() + PENW);
+}
+
+void LogicBlock::paint(QPainter *painter, const QStyleOptionGraphicsItem *option __attribute__((unused)), QWidget *widget __attribute__((unused))) {
+    painter->drawRoundedRect(box, RADIUS, RADIUS);
+}
+
+void LogicBlock::setPos(qreal x, qreal y) {
+    QGraphicsItem::setPos(x, y);
+    for (int i = 0; i < connectors.size(); i++) {
+        struct Con &c = connectors[i];
+        c.con->setPos(x + c.p.x(), y + c.p.y());
+    }
+}
+
+void LogicBlock::setSize(qreal width, qreal height) {
+    box.setX(-width/2 - GAP);
+    box.setWidth(width + (2*GAP));
+    box.setHeight(height + (2*GAP));
+    for (int i = 0; i < connectors.size(); i++) { // Update point for all connectors
+        struct Con &c = connectors[i];
+        c.p = con_pos(c.x, c.y);
+    }
+    setPos(x(), y());
+}
+
+static qreal sign(qreal v) {
+    // This intentionally doesn't return 0 on v == 0
+    return (0 <= v) - (0 > v);
+}
+
+const Connector *LogicBlock::new_connector(qreal x, qreal y) {
+    // stick to closest edge
+    if (fabs(x) > fabs(y))
+        x = sign(x);
+    else
+        y = sign(y);
+
+    // Note: we are using here that 0 and M_PI is same angle but different orientation (but we ignore orientation for now)
+    Connector *c = new Connector(fabs(x) > fabs(y) ? 0 : M_PI_2);
+    connectors.append({
+        .con = c,
+        .x = x,
+        .y = y,
+        .p = con_pos(x, y)
+    });
+    setPos(this->x(), this->y()); // Update connector position
+    return c;
+}
+
+QPointF LogicBlock::con_pos(qreal x, qreal y) {
+    qreal px, py;
+    px = (box.right() - GAP) * x + (GAP * sign(x));
+    py = (box.bottom()/2 - GAP) * (y + 1) + (GAP * sign(y));
+    return QPointF(px, py);
+}
diff --git a/qtmips_gui/coreview/logicblock.h b/qtmips_gui/coreview/logicblock.h
new file mode 100644
index 0000000..4c1310c
--- /dev/null
+++ b/qtmips_gui/coreview/logicblock.h
@@ -0,0 +1,44 @@
+#ifndef LOGICBLOCK_H
+#define LOGICBLOCK_H
+
+#include <QGraphicsItem>
+#include <QPainter>
+#include <QGraphicsSimpleTextItem>
+#include <QVector>
+#include "connection.h"
+
+namespace coreview {
+
+class LogicBlock : public QGraphicsItem {
+public:
+    LogicBlock(QString name);
+    LogicBlock(QVector<QString> name);
+    ~LogicBlock();
+
+    QRectF boundingRect() const;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+
+    void setPos(qreal x, qreal y);
+    void setSize(qreal width, qreal height);
+
+    // This creates new connector
+    // Position is determined by x and y in 0 to 1 range and is mapped to real size of this block
+    // Using x=y and x=-y coordinates is not supported
+    const Connector *new_connector(qreal x, qreal y);
+
+private:
+    QVector<QGraphicsSimpleTextItem*> text;
+    QRectF box;
+
+    struct Con {
+        Connector *con;
+        qreal x, y;
+        QPointF p;
+    };
+    QVector<struct Con> connectors;
+    QPointF con_pos(qreal x, qreal y);
+};
+
+}
+
+#endif // LOGICBLOCK_H