Implement few initial graphic elements

1 files changed, 51 insertions, 0 deletions

diff --git a/qtmips_gui/coreview/latch.cpp b/qtmips_gui/coreview/latch.cpp
new file mode 100644
index 0000000..77bb317
--- /dev/null
+++ b/qtmips_gui/coreview/latch.cpp
@@ -0,0 +1,51 @@
+#include "latch.h"
+
+using namespace coreview;
+
+//////////////////////
+#define WIDTH 10
+#define PENW 1
+//////////////////////
+
+Latch::Latch(QtMipsMachine *machine, qreal height) {
+    this->height = height;
+    connect(machine, SIGNAL(tick()), this, SLOT(tick()));
+}
+
+QRectF Latch::boundingRect() const {
+    return QRectF(-PENW / 2, -PENW / 2, WIDTH + PENW, height + PENW);
+}
+
+void Latch::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
+    painter->drawRect(0, 0, WIDTH, height);
+    // Now tick rectangle
+    const QPointF tickPolygon[] = {
+        QPointF(0, 0),
+        QPointF(WIDTH/2, WIDTH/2),
+        QPointF(WIDTH, 0)
+    };
+    painter->drawPolygon(tickPolygon, 3);
+}
+
+void Latch::setPos(qreal x, qreal y) {
+    QGraphicsObject::setPos(x, y);
+    for (unsigned i = 0; i < connectors.size(); i++) {
+        connectors[i].in->setPos(x, y + connectors_off[i]);
+        connectors[i].out->setPos(x + WIDTH, y + connectors_off[i]);
+    }
+}
+
+struct Latch::ConnectorPair Latch::new_connector(qreal cy) {
+    SANITY_ASSERT(cy < height, "Latch: Trying to create connector outside of latch height");
+    ConnectorPair cp;
+    cp.in = new Connector();
+    cp.out = new Connector();
+    connectors.append(cp);
+    connectors_off.append(cy);
+    setPos(x(), y()); // Update connectors position
+    return cp;
+}
+
+void Latch::tick() {
+    // TODO animate
+}