smithchartwidget.h

/*
 *  Copyright (C) 2025 Andrés Martínez Mera - andresmmera@protonmail.com
 *
 *  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 3 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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef SMITHCHARTWIDGET_H
#define SMITHCHARTWIDGET_H
 
#include <QCheckBox>
#include <QComboBox>
#include <QDoubleSpinBox>
#include <QLabel>
#include <QMap>
#include <QMouseEvent>
#include <QPainter>
#include <QPen>
#include <QSet>
#include <QVBoxLayout>
#include <QWidget>
#include <complex>
 
class Qucs_S_SPAR_Viewer; // Forward declaration
 
class SmithChartWidget : public QWidget {
  Q_OBJECT
 
public:
  struct Trace {
    QList<std::complex<double>> impedances;
    QList<double> frequencies;
    QPen pen;
    double Z0;
  };
 
  struct Marker {
    QString id;
    double frequency;
    QPen pen;
  };
 
  struct AxisSettings {
    QString Z0;
 
    double freqMax;
    double freqMin;
    QString freqUnit;
 
    bool y_chart;
    bool z_chart;
  };
 
  SmithChartWidget::AxisSettings getSettings() const;
  void setSettings(const AxisSettings& settings);
 
  SmithChartWidget(QWidget* parent = nullptr);
  ~SmithChartWidget() override;
 
  void addTrace(const QString& name, const Trace& trace);
  void removeTrace(const QString&);
  void clearTraces();
  void setCharacteristicImpedance(double z0);
  double characteristicImpedance() const { return z0; }
  QPen getTracePen(const QString& traceName) const;
  void setTracePen(const QString& traceName, const QPen& pen);
  QMap<QString, QPen> getTracesInfo() const;
 
  bool addMarker(const QString& markerId, double frequency,
                 const QPen& pen = QPen(Qt::red, 2));
  bool removeMarker(const QString& markerId);
  bool updateMarkerFrequency(const QString& markerId, double newFrequency);
 
  void clearMarkers();
  QMap<QString, double> getMarkers() const;
 
signals:
  void impedanceSelected(const std::complex<double>& impedance);
 
protected:
  void paintEvent(QPaintEvent* event) override;
  void mousePressEvent(QMouseEvent* event) override;
 
private:
  void drawSmithChartGrid(QPainter* painter);
  void drawReactanceArc(QPainter* painter, const QPointF& center, double radius,
                        double reactance);
  void drawSusceptanceArc(QPainter* painter, const QPointF& center,
                          double radius, double susceptance);
  void plotImpedanceData(QPainter* painter);
 
  void drawMarkers(QPainter* painter);
  QPointF smithChartToWidget(const std::complex<double>& reflectionCoefficient);
  std::complex<double> widgetToSmithChart(const QPointF& widgetPoint);
  std::complex<double>
  interpolateImpedance(const QList<double>& frequencies,
                       const QList<std::complex<double>>& impedances,
                       double targetFreq);
 
  void calculateArcPoints(const QRectF& arcRect, double startAngle,
                          double sweepAngle, QPointF& startPoint,
                          QPointF& endPoint);
 
private:
  QMap<QString, Trace> traces;   // Changed from QList to QMap
  QMap<QString, Marker> markers; // Store markers by ID instead of frequency
  double z0;                     // Characteristic impedance
  QPointF lastMousePos;
 
  // Add a scale factor for zoom functionality
  double scaleFactor;
  double panX;
  double panY;
 
private slots:
  void onZ0Changed(int index);
  void onShowAdmittanceChartChanged(int);
  void onShowConstantCurvesChanged(int);
 
private:
  QComboBox* m_Z0ComboBox;
  QCheckBox* m_ShowAdmittanceChartCheckBox; // Checkbox for admittance chart
  QCheckBox*
      m_ShowConstantCurvesCheckBox; // Checkbox for reactance/resistance curves
  bool m_showConstantCurves;        // Flag for curve display
  bool m_showAdmittanceChart;       // Flag for admittance chart display
  QVBoxLayout* m_layout;
 
private:
  // Frequency range controls
  QDoubleSpinBox* m_minFreqSpinBox;
  QDoubleSpinBox* m_maxFreqSpinBox;
  QComboBox* m_freqUnitComboBox;
  double m_minFreq; // Minimum frequency in Hz
  double m_maxFreq; // Maximum frequency in Hz
 
  // Add to private slots: section in smithchartwidget.h
private slots:
  void onMinFreqChanged(double value);
  void onMaxFreqChanged(double value);
  void onFreqUnitChanged(int index);
  double getFrequencyMultiplier() const;
  void updateFrequencyRange();
};
 
#endif // SMITHCHARTWIDGET_H