IncrementalPlot.h 3.92 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
/*=====================================================================

QGroundControl Open Source Ground Control Station

(c) 2009, 2010 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>

This file is part of the QGROUNDCONTROL project

    QGROUNDCONTROL 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 3 of the License, or
    (at your option) any later version.

    QGROUNDCONTROL 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.

    You should have received a copy of the GNU General Public License
    along with QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.

======================================================================*/

/**
 * @file
 *   @brief Defition of class IncrementalPlot
 *   @author Lorenz Meier <mavteam@student.ethz.ch>
 *
 */

31 32 33 34 35 36
#ifndef INCREMENTALPLOT_H
#define INCREMENTALPLOT_H

#include <QTimer>
#include <qwt_array.h>
#include <qwt_plot.h>
37
#include <qwt_legend.h>
38
#include <QMap>
39
#include "ChartPlot.h"
40 41 42

class QwtPlotCurve;

43 44 45
/**
 * @brief Plot data container for growing data
 */
46 47 48 49 50 51 52
class CurveData
{
public:
    CurveData();

    void append(double *x, double *y, int count);

53
    /** @brief The number of datasets held in the data structure */
54
    int count() const;
55
    /** @brief The reserved size of the data structure in units */
56 57 58 59 60 61 62 63 64 65 66 67
    int size() const;
    const double *x() const;
    const double *y() const;

private:
    int d_count;
    QwtArray<double> d_x;
    QwtArray<double> d_y;
    QTimer *d_timer;
    int d_timerCount;
};

68 69 70 71 72 73 74
/**
 * @brief Incremental plotting widget
 *
 * This widget plots data incrementally when new data arrives.
 * It will only repaint the minimum screen content necessary to avoid
 * a too high CPU consumption. It auto-scales the plot to new data.
 */
75
class IncrementalPlot : public ChartPlot
76 77 78
{
    Q_OBJECT
public:
79
    /** @brief Create a new, empty incremental plot */
80 81 82
    IncrementalPlot(QWidget *parent = NULL);
    virtual ~IncrementalPlot();

83
    /** @brief Get the state of the grid */
84
    bool gridEnabled() const;
85 86

    /** @brief Read out data from a curve */
87
    int data(const QString &key, double* r_x, double* r_y, int maxSize);
88

89
public slots:
90
    /** @brief Append one data point */
91
    void appendData(const QString &key, double x, double y);
92

93
    /** @brief Append multiple data points */
94
    void appendData(const QString &key, double* x, double* y, int size);
95 96

    /** @brief Reset the plot scaling to the default value */
97
    void resetScaling();
98 99 100 101 102

    /** @brief Update the plot scale based on current data/symmetric mode */
    void updateScale();

    /** @brief Remove all data from the plot and repaint */
103
    void removeData();
104

105 106
    /** @brief Show the plot legend */
    void showLegend(bool show);
107 108 109 110

    /** @brief Show the plot grid */
    void showGrid(bool show);

111
    /** @brief Set new plot style */
112
    void setStyleText(const QString &style);
113

114 115 116 117 118 119 120
    /** @brief Set symmetric axis scaling mode */
    void setSymmetric(bool symmetric);

protected slots:
    /** @brief Handle the click on a legend item */
    void handleLegendClick(QwtPlotItem* item, bool on);

121
protected:
122 123 124 125 126 127
    bool symmetric;        ///< Enable symmetric plotting
    QwtLegend* legend;     ///< Plot legend
    double xmin;           ///< Minimum x value seen
    double xmax;           ///< Maximum x value seen
    double ymin;           ///< Minimum y value seen
    double ymax;           ///< Maximum y value seen
128
    QString styleText;     ///< Curve style set by setStyleText
129 130

private:
131
    QMap<QString, CurveData* > d_data;      ///< Data points
132 133
    /** Helper function to apply styleText style to the given curve */
    void updateStyle(QwtPlotCurve *curve);
134 135 136
};

#endif /* INCREMENTALPLOT_H */