text: ﻿#include "frmlinestyle.h"
  #include "ui_frmlinestyle.h"
  #include "qdebug.h"
  
  frmLineStyle::frmLineStyle(QWidget *parent) : QWidget(parent), ui(new Ui::frmLineStyle)
  {
      ui->setupUi(this);
      this->initForm();
  }
  
  frmLineStyle::~frmLineStyle()
  {
      delete ui;
  }
  
  void frmLineStyle::initForm()
  {
      ui->customPlot->legend->setVisible(true);
      ui->customPlot->legend->setFont(QFont("Helvetica", 9));
  
      QPen pen;
      QStringList lineNames;
      lineNames << "lsNone" << "lsLine" << "lsStepLeft" << "lsStepRight" << "lsStepCenter" << "lsImpulse";
  
      // add graphs with different line styles:
      for (int i = QCPGraph::lsNone; i <= QCPGraph::lsImpulse; ++i) {
          ui->customPlot->addGraph();
          pen.setColor(QColor(qSin(i * 1 + 1.2) * 80 + 80, qSin(i * 0.3 + 0) * 80 + 80, qSin(i * 0.3 + 1.5) * 80 + 80));
          ui->customPlot->graph()->setPen(pen);
          ui->customPlot->graph()->setName(lineNames.at(i - QCPGraph::lsNone));
          ui->customPlot->graph()->setLineStyle((QCPGraph::LineStyle)i);
          ui->customPlot->graph()->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, 5));
  
          // generate data:
          QVector<double> x(15), y(15);
          for (int j = 0; j < 15; ++j) {
              x[j] = j / 15.0 * 5 * 3.14 + 0.01;
              y[j] = 7 * qSin(x[j]) / x[j] - (i - QCPGraph::lsNone) * 5 + (QCPGraph::lsImpulse) * 5 + 2;
          }
  
          ui->customPlot->graph()->setData(x, y);
          ui->customPlot->graph()->rescaleAxes(true);
      }
  
      // zoom out a bit:
      ui->customPlot->yAxis->scaleRange(1.1, ui->customPlot->yAxis->range().center());
      ui->customPlot->xAxis->scaleRange(1.1, ui->customPlot->xAxis->range().center());
  
      // set blank axis lines:
      ui->customPlot->xAxis->setTicks(false);
      ui->customPlot->yAxis->setTicks(true);
      ui->customPlot->xAxis->setTickLabels(false);
      ui->customPlot->yAxis->setTickLabels(true);
  
      // make top right axes clones of bottom left axes:
      ui->customPlot->axisRect()->setupFullAxesBox();
      ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
  }
  