Inital history graph implementation and using linear scales where applicable.

- geometry.h for geometry calculation functions
- scale.h for implementations of scales (currently only the linear scale)
- updated main_view.qml for the new HistoryGraph component
- HistoryGraph displays each subsample used as a mini scatterplot (no colors
  currently)
- Scatterplot now uses scale.h for transformations
- Code cleanup and some bug fixes

1 files changed, 3 insertions, 4 deletions

diff --git a/scatterplot.h b/scatterplot.h
index 3d7fa36..43bfc57 100644
--- a/scatterplot.h
+++ b/scatterplot.h
@@ -6,6 +6,7 @@
 #include <QtQuick>
 
 #include "colorscale.h"
+#include "scale.h"
 
 class Scatterplot : public QQuickItem
 {
@@ -37,21 +38,19 @@ private:
     QSGNode *createGlyphNodeTree();
     bool updateSelection(bool mergeSelection);
 
-    float fromDataXToScreenX(float x) const;
-    float fromDataYToScreenY(float y) const;
-
     void applyManipulation();
 
     void updateGeometry();
     void updateMaterials();
 
     arma::mat m_xy;
-    float m_xmin, m_xmax, m_ymin, m_ymax;
+    LinearScale m_sx, m_sy;
 
     enum InteractionState {
         INTERACTION_NONE,
         INTERACTION_SELECTING,
         INTERACTION_SELECTED,
+        INTERACTION_BEGIN_MOVING,
         INTERACTION_MOVING
     } m_currentInteractionState;