2 files changed, 37 insertions, 6 deletions
diff --git a/qtmips_gui/coreview/instructionview.cpp b/qtmips_gui/coreview/instructionview.cpp
index bab9bc8..0c9ec68 100644
--- a/qtmips_gui/coreview/instructionview.cpp
+++ b/qtmips_gui/coreview/instructionview.cpp
@@ -1,15 +1,39 @@
 #include "instructionview.h"
+#include <QPainter>
 #include <QFont>
 
 using namespace coreview;
 
-InstructionView::InstructionView() : QObject(), QGraphicsSimpleTextItem() {
+//////////////////////
+#define WIDTH 120
+#define HEIGHT 14
+#define ROUND 5
+#define GAP 2
+#define PENW 1
+//////////////////////
+
+InstructionView::InstructionView() : QGraphicsObject(nullptr), text(this) {
     QFont f;
-    f.setPointSize(8);
-    setFont(f);
-    instruction_update(machine::Instruction());
+    f.setPointSize(6);
+    text.setFont(f);
+
+    instruction_update(machine::Instruction()); // Initialize to NOP
+}
+
+QRectF InstructionView::boundingRect() const {
+    return QRectF(-WIDTH/2 - PENW/2, -PENW/2, WIDTH + PENW, HEIGHT + PENW);
+}
+
+void InstructionView::paint(QPainter *painter, const QStyleOptionGraphicsItem *option __attribute__((unused)), QWidget *widget __attribute__((unused))) {
+    painter->setPen(QPen(QColor(240, 240, 240)));
+    painter->setBrush(QBrush(QColor(240, 240, 240)));
+    painter->drawRoundRect(-WIDTH/2, 0, WIDTH, HEIGHT, ROUND, ROUND);
 }
 
 void InstructionView::instruction_update(const machine::Instruction &i) {
-    setText(i.to_str());
+    QRectF prev_box = boundingRect();
+    text.setText(i.to_str());
+    QRectF box = text.boundingRect();
+    text.setPos(-box.width()/2, GAP);
+    update(prev_box.united(boundingRect()));
 }
diff --git a/qtmips_gui/coreview/instructionview.h b/qtmips_gui/coreview/instructionview.h
index 4b7d171..2b0e340 100644
--- a/qtmips_gui/coreview/instructionview.h
+++ b/qtmips_gui/coreview/instructionview.h
@@ -1,18 +1,25 @@
 #ifndef INSTRUCTIONVIEW_H
 #define INSTRUCTIONVIEW_H
 
+#include <QGraphicsObject>
 #include <QGraphicsSimpleTextItem>
 #include "qtmipsmachine.h"
 
 namespace coreview {
 
-class InstructionView : public QObject, public QGraphicsSimpleTextItem {
+class InstructionView : public QGraphicsObject {
     Q_OBJECT
 public:
     InstructionView();
 
+    QRectF boundingRect() const;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+
 public slots:
     void instruction_update(const machine::Instruction &i);
+
+private:
+    QGraphicsSimpleTextItem text;
 };
 
 }