2 files changed, 17 insertions, 4 deletions
diff --git a/qtmips_gui/coreview/logicblock.cpp b/qtmips_gui/coreview/logicblock.cpp
index 2aabe7f..e2c5e24 100644
--- a/qtmips_gui/coreview/logicblock.cpp
+++ b/qtmips_gui/coreview/logicblock.cpp
@@ -47,7 +47,7 @@ using namespace coreview;
 
 LogicBlock::LogicBlock(QString name) : LogicBlock(QVector<QString>({name})) { }
 
-LogicBlock::LogicBlock(QVector<QString> name) : QGraphicsItem(nullptr) {
+LogicBlock::LogicBlock(QVector<QString> name) : QGraphicsObject(nullptr) {
     QFont font;
     font.setPointSize(7);
 
@@ -82,7 +82,7 @@ void LogicBlock::paint(QPainter *painter, const QStyleOptionGraphicsItem *option
 }
 
 void LogicBlock::setPos(qreal x, qreal y) {
-    QGraphicsItem::setPos(x, y);
+    QGraphicsObject::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());
@@ -134,3 +134,8 @@ QPointF LogicBlock::con_pos(qreal x, qreal y) {
         py += GAP * sign(y);
     return QPointF(px, py);
 }
+
+void LogicBlock::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) {
+    QGraphicsObject::mouseDoubleClickEvent(event);
+    emit open_block();
+}
diff --git a/qtmips_gui/coreview/logicblock.h b/qtmips_gui/coreview/logicblock.h
index 27c2951..a384b06 100644
--- a/qtmips_gui/coreview/logicblock.h
+++ b/qtmips_gui/coreview/logicblock.h
@@ -36,15 +36,17 @@
 #ifndef LOGICBLOCK_H
 #define LOGICBLOCK_H
 
-#include <QGraphicsItem>
+#include <QGraphicsObject>
 #include <QPainter>
 #include <QGraphicsSimpleTextItem>
 #include <QVector>
+#include <QObject>
 #include "connection.h"
 
 namespace coreview {
 
-class LogicBlock : public QGraphicsItem {
+class LogicBlock : public QGraphicsObject {
+    Q_OBJECT
 public:
     LogicBlock(QString name);
     LogicBlock(QVector<QString> name);
@@ -61,6 +63,9 @@ public:
     // Using x=y and x=-y coordinates is not supported
     const Connector *new_connector(qreal x, qreal y);
 
+signals:
+    void open_block();
+
 private:
     QVector<QGraphicsSimpleTextItem*> text;
     QRectF box;
@@ -72,6 +77,9 @@ private:
     };
     QVector<struct Con> connectors;
     QPointF con_pos(qreal x, qreal y);
+
+protected:
+    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
 };
 
 }