From 0b6df071d94ae8f7c9cdd3c96506a1420129e471 Mon Sep 17 00:00:00 2001
From: Samuel Fadel <samuelfadel@gmail.com>
Date: Fri, 15 May 2015 18:10:52 -0300
Subject: Initial commit. ForceScheme seems bugged.

---
 scatterplot.cpp | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 scatterplot.cpp

(limited to 'scatterplot.cpp')

diff --git a/scatterplot.cpp b/scatterplot.cpp
new file mode 100644
index 0000000..e775661
--- /dev/null
+++ b/scatterplot.cpp
@@ -0,0 +1,60 @@
+#include "scatterplot.h"
+
+#include <cstdio>
+#include "glyph.h"
+#include <QSGNode>
+#include <QSGGeometryNode>
+
+const int GLYPH_SIZE = 10;
+
+Scatterplot::Scatterplot()
+{
+    setFlag(QQuickItem::ItemHasContents);
+}
+
+Scatterplot::~Scatterplot()
+{
+}
+
+void Scatterplot::setData(const arma::mat &data)
+{
+    if (data.n_cols != 2)
+        return;
+
+    m_data = data;
+    qreal xmin = m_data.col(0).min(),
+          xmax = m_data.col(0).max(),
+          ymin = m_data.col(1).min(),
+          ymax = m_data.col(1).max();
+
+    for (arma::uword i = 0; i < m_data.n_rows; i++) {
+        arma::rowvec row = m_data.row(i);
+
+        Glyph *glyph = new Glyph();
+
+        glyph->setSize(5);
+        glyph->setX((row[0] - xmin) / (xmax - xmin) * width());
+        glyph->setY((row[1] - ymin) / (ymax - ymin) * height());
+
+        glyph->setParent(this);
+    }
+
+    update();
+}
+
+QSGNode *Scatterplot::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
+{
+    QSGNode *node = 0;
+
+    if (!oldNode) {
+        node = new QSGNode;
+        for (QObjectList::const_iterator it = children().begin(); it != children().end(); it++)
+            node->appendChildNode(static_cast<Glyph *>(*it)->updatePaintNode(0, 0));
+    } else {
+        node = static_cast<QSGNode *>(oldNode);
+    }
+
+    node->markDirty(QSGNode::DirtyGeometry);
+
+    return node;
+}
-- 
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