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/*
* Copyright (c) 2012, Red Hat.
* Copyright (c) 2012, Nathan Scott. All Rights Reserved.
* Copyright (c) 2007, Aconex. All Rights Reserved.
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef SAMPLING_H
#define SAMPLING_H
#include <QtCore/QVariant>
#include <qwt_plot.h>
#include <qwt_plot_curve.h>
#include <qwt_scale_engine.h>
#include "chart.h"
class SamplingCurve : public ChartCurve
{
public:
SamplingCurve(const QString &title) : ChartCurve(title) { }
virtual void drawSeries(QPainter *painter,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRectF &canvasRect, int from, int to) const;
};
class SamplingItem : public ChartItem
{
public:
SamplingItem(Chart *,
QmcMetric *, pmMetricSpec *, pmDesc *,
const QString &, Chart::Style, int, int);
~SamplingItem(void);
QwtPlotItem *item();
QwtPlotCurve *curve();
void preserveSample(int, int);
void punchoutSample(int);
void updateValues(bool, bool, pmUnits *, int, int, double, double, double);
void rescaleValues(pmUnits *);
void resetValues(int, double, double);
void revive();
void remove();
void setStroke(Chart::Style, QColor, bool);
void clearCursor();
bool containsPoint(const QRectF &, int);
void updateCursor(const QPointF &, int);
const QString &cursorInfo();
void replot(int, double *);
void copyRawDataArray(void);
void copyRawDataPoint(int index);
void copyDataPoint(int index);
int maximumDataCount(int maximum);
void truncateData(int offset);
double sumData(int index, double sum);
void setPlotUtil(int index, double sum);
double setPlotStack(int index, double sum);
double setDataStack(int index, double sum);
private:
struct {
Chart *chart;
SamplingCurve *curve;
QString info;
double scale;
double *data;
double *itemData;
int dataCount;
} my;
};
//
// *Always* clamp minimum metric value at zero when positive -
// preventing confusion when values silently change up towards
// the maximum over time (for pmchart, our users are expecting
// a constant zero baseline at all times, or so we're told).
//
class SamplingScaleEngine : public QwtLinearScaleEngine
{
friend class Chart;
public:
SamplingScaleEngine();
double minimum() const { return my.minimum; }
double maximum() const { return my.maximum; }
bool autoScale() const { return my.autoScale; }
void setAutoScale(bool autoScale) { my.autoScale = autoScale; }
void setScale(bool autoScale, double minValue, double maxValue);
virtual void autoScale(int maxSteps, double &minValue,
double &maxValue, double &stepSize) const;
private:
struct {
bool autoScale;
double minimum;
double maximum;
} my;
};
//
//
// Implement sampling-specific behaviour within a Chart
//
class SamplingEngine : public ChartEngine
{
public:
SamplingEngine(Chart *chart, pmDesc &);
bool isCompatible(pmDesc &);
ChartItem *addItem(QmcMetric *, pmMetricSpec *, pmDesc *, const QString &);
void updateValues(bool, int, int, double, double, double);
void replot(void);
bool autoScale() { return my.scaleEngine->autoScale(); }
void redoScale(void);
void setScale(bool, double, double);
void scale(bool *, double *, double *);
void setStyle(Chart::Style);
bool rateConvert() const { return my.rateConvert; }
void setRateConvert(bool enabled) { my.rateConvert = enabled; }
bool antiAliasing() const { return my.antiAliasing; }
void setAntiAliasing(bool enabled) { my.antiAliasing = enabled; }
void selected(const QPolygon &);
void moved(const QPointF &);
private:
SamplingItem *samplingItem(int index);
void normaliseUnits(pmDesc &desc);
struct {
pmUnits units;
bool rateConvert;
bool antiAliasing;
SamplingScaleEngine *scaleEngine;
Chart *chart;
} my;
};
#endif // SAMPLING_H
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