comparison data/model/SparseValueModel.h @ 0:fc9323a41f5a

start base : Sonic Visualiser sv1-1.0rc1

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2006 Chris Cannam.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _SPARSE_VALUE_MODEL_H_
+#define _SPARSE_VALUE_MODEL_H_
+
+#include "system/System.h"
+#include "SparseModel.h"
+#include "base/UnitDatabase.h"
+
+#include <cmath>
+
+/**
+ * Model containing sparse data (points with some properties) of which
+ * one of the properties is an arbitrary float value.  The other
+ * properties depend on the point type.
+ */
+
+template <typename PointType>
+class SparseValueModel : public SparseModel<PointType>
+{
+public:
+    SparseValueModel(size_t sampleRate, size_t resolution,
+		     bool notifyOnAdd = true) :
+	SparseModel<PointType>(sampleRate, resolution, notifyOnAdd),
+	m_valueMinimum(0.f),
+	m_valueMaximum(0.f),
+        m_haveExtents(false)
+    { }
+
+    SparseValueModel(size_t sampleRate, size_t resolution,
+		     float valueMinimum, float valueMaximum,
+		     bool notifyOnAdd = true) :
+	SparseModel<PointType>(sampleRate, resolution, notifyOnAdd),
+	m_valueMinimum(valueMinimum),
+	m_valueMaximum(valueMaximum),
+        m_haveExtents(true)
+    { }
+
+    using SparseModel<PointType>::m_points;
+    using SparseModel<PointType>::modelChanged;
+
+    virtual float getValueMinimum() const { return m_valueMinimum; }
+    virtual float getValueMaximum() const { return m_valueMaximum; }
+
+    virtual QString getScaleUnits() const { return m_units; }
+    virtual void setScaleUnits(QString units) {
+        m_units = units;
+        UnitDatabase::getInstance()->registerUnit(units);
+    }
+
+    virtual void addPoint(const PointType &point)
+    {
+	bool allChange = false;
+
+        if (!isnan(point.value) && !isinf(point.value)) {
+            if (!m_haveExtents || point.value < m_valueMinimum) {
+                m_valueMinimum = point.value; allChange = true;
+            }
+            if (!m_haveExtents || point.value > m_valueMaximum) {
+                m_valueMaximum = point.value; allChange = true;
+            }
+            m_haveExtents = true;
+        }
+
+	SparseModel<PointType>::addPoint(point);
+	if (allChange) emit modelChanged();
+    }
+
+    virtual void deletePoint(const PointType &point)
+    {
+	SparseModel<PointType>::deletePoint(point);
+
+	if (point.value == m_valueMinimum ||
+	    point.value == m_valueMaximum) {
+
+	    float formerMin = m_valueMinimum, formerMax = m_valueMaximum;
+
+	    for (typename SparseModel<PointType>::PointList::const_iterator i
+		     = m_points.begin();
+		 i != m_points.end(); ++i) {
+
+		if (i == m_points.begin() || i->value < m_valueMinimum) {
+		    m_valueMinimum = i->value;
+		} 
+		if (i == m_points.begin() || i->value > m_valueMaximum) {
+		    m_valueMaximum = i->value;
+		} 
+	    }
+
+	    if (formerMin != m_valueMinimum || formerMax != m_valueMaximum) {
+		emit modelChanged();
+	    }
+	}
+    }
+
+    virtual QString toXmlString(QString indent = "",
+				QString extraAttributes = "") const
+    {
+	return SparseModel<PointType>::toXmlString
+	    (indent,
+	     QString("%1 minimum=\"%2\" maximum=\"%3\" units=\"%4\"")
+	     .arg(extraAttributes).arg(m_valueMinimum).arg(m_valueMaximum)
+             .arg(this->encodeEntities(m_units)));
+    }
+
+protected:
+    float m_valueMinimum;
+    float m_valueMaximum;
+    bool m_haveExtents;
+    QString m_units;
+};
+
+
+#endif
+