From 49b32975e9963de01b2ecc102b95488e4fdbf975 Mon Sep 17 00:00:00 2001
From: Samuel Fadel <samuelfadel@gmail.com>
Date: Fri, 22 May 2015 12:17:09 -0300
Subject: Optimized InteractionHandler to minimze allocations; view updates now
 happen whenever a point is moved.

---
 interactionhandler.cpp | 11 ++++-------
 interactionhandler.h   |  2 +-
 scatterplot.cpp        |  6 +++++-
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/interactionhandler.cpp b/interactionhandler.cpp
index 217f4a5..5225be9 100644
--- a/interactionhandler.cpp
+++ b/interactionhandler.cpp
@@ -8,24 +8,21 @@ InteractionHandler::InteractionHandler(const arma::mat &X,
     : m_X(X)
     , m_labels(labels)
     , m_sampleIndices(sampleIndices)
+    , m_Y(X.n_rows, 3)
     , m_technique(TECHNIQUE_LAMP)
 {
+    m_Y.col(2) = m_labels;
 }
 
 void InteractionHandler::setSubsample(const arma::mat &Ys)
 {
-    arma::mat embedding(m_X.n_rows, Ys.n_cols);
     switch (m_technique) {
     case TECHNIQUE_PLMP:
     case TECHNIQUE_LSP:
     case TECHNIQUE_LAMP:
-        embedding = mp::lamp(m_X, m_sampleIndices, Ys);
+        m_Y.cols(0, 1) = mp::lamp(m_X, m_sampleIndices, Ys);
         break;
     }
 
-    arma::mat Y(embedding.n_rows, embedding.n_cols + 1);
-    Y.cols(0, embedding.n_cols - 1) = embedding;
-    Y.col(Y.n_cols - 1) = m_labels;
-
-    emit subsampleChanged(Y);
+    emit subsampleChanged(m_Y);
 }
diff --git a/interactionhandler.h b/interactionhandler.h
index 3dbeb8a..5468dab 100644
--- a/interactionhandler.h
+++ b/interactionhandler.h
@@ -24,7 +24,7 @@ public slots:
     void setSubsample(const arma::mat &Ys);
 
 private:
-    arma::mat m_X;
+    arma::mat m_X, m_Y;
     arma::vec m_labels;
     arma::uvec m_sampleIndices;
     InteractiveTechnique m_technique;
diff --git a/scatterplot.cpp b/scatterplot.cpp
index b0c8034..284f17b 100644
--- a/scatterplot.cpp
+++ b/scatterplot.cpp
@@ -214,9 +214,14 @@ void Scatterplot::mouseMoveEvent(QMouseEvent *event)
     case INTERACTION_SELECTED:
         return;
     case INTERACTION_SELECTING:
+        m_dragCurrentPos = event->localPos();
+        update();
+        break;
     case INTERACTION_MOVING:
         m_dragCurrentPos = event->localPos();
+        updateData();
         update();
+        m_dragOriginPos = m_dragCurrentPos;
         break;
     }
 }
@@ -235,7 +240,6 @@ void Scatterplot::mouseReleaseEvent(QMouseEvent *event)
 
     case INTERACTION_MOVING:
         m_currentState = INTERACTION_SELECTED;
-        updateData();
         update();
         break;
     case INTERACTION_NONE:
-- 
cgit v1.2.3