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-#include "CustomLineGraph.h"
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-
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-#include <QDebug>
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-#include <QBrush>
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-#include <random>
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-#include <algorithm>
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-
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-#define X_AXIS_GAP_AMOUNT 5
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-#define Y_AXIS_GAP_AMOUNT 10
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-#define X_AXIS_NUMBER_LINE_LENGTH 5
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-#define Y_AXIS_NUMBER_LINE_LENGTH 5
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-
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-
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-
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-CustomLineGraph::CustomLineGraph(QWidget* parent, QString title, int lineWidth, double circleRadius):QWidget(parent), title(title), lineWidth(lineWidth), circleRadius(circleRadius), linePen(Qt::blue), rectPen(Qt::red), axisPen(Qt::black)
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-{
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- linePen.setWidth(lineWidth);
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- linePen.setJoinStyle(Qt::PenJoinStyle::RoundJoin);
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-
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- //Populate data with DummyData
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- //Draw Points
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- std::random_device rd; //Will be used to obtain a seed for the random number engine
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- std::mt19937 gen(rd()); //Standard mersenne_twister_engine seeded with rd()
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- std::uniform_real_distribution<double> doubleDistr(0.0, 1.0);
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- hueoffset = doubleDistr(gen);
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-
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-}
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-
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-CustomLineGraph::~CustomLineGraph()
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-{
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-}
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-void CustomLineGraph::paintEvent(QPaintEvent* event)
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-{
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- QPainter painter(this);
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- painter.setRenderHint(QPainter::RenderHint::HighQualityAntialiasing);
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- if (seriesVec.empty()) {
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- painter.setPen(axisPen);
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- painter.setFont(QFont("Arial", 12, QFont::Bold));
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- painter.drawText(rect(), Qt::AlignCenter, "No Data connected");
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- return;
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- }
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- //Calculate LineRect
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- QRect lineRect(rect());
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- lineRect.setBottom(lineRect.bottom() - 20);
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- lineRect.setLeft(lineRect.left() + 40);
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- lineRect.setTop(lineRect.top() + 20);
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- lineRect.setRight(lineRect.right() - 10);
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- lineRect.setWidth(lineRect.width() - (lineRect.width() % X_AXIS_GAP_AMOUNT) + 1);
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- lineRect.setHeight(lineRect.height() - (lineRect.height() % Y_AXIS_GAP_AMOUNT) + 1);
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-
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-
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- //draw Title
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- painter.setPen(axisPen);
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- painter.setFont(QFont("Arial", 12));
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- QRect titleRect(QPoint(rect().left(), rect().top()), QPoint(lineRect.right(), lineRect.top()));
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- painter.drawText(titleRect, Qt::AlignCenter, title);
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-
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- painter.setFont(QFont("Arial", 8));
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- //draw X-Axis
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- QRect xAxisRect(QPoint(lineRect.left(), lineRect.bottom()), QPoint(lineRect.right(), rect().bottom()));
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- QPainterPath xAxisPath;
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- xAxisPath.moveTo(xAxisRect.left(), xAxisRect.top());
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- xAxisPath.lineTo(xAxisRect.right(), xAxisRect.top());
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- int xGap = xAxisRect.width() / X_AXIS_GAP_AMOUNT;
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- QRect textRect(0, 0, 40, 9);
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-
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- for (int i = 0; i < 11; i++) {
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- xAxisPath.moveTo(xAxisRect.left() + i * xGap, xAxisRect.top() + X_AXIS_NUMBER_LINE_LENGTH);
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- xAxisPath.lineTo(xAxisRect.left() + i * xGap, xAxisRect.top());
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- textRect.moveCenter(QPoint(xAxisRect.left() + i * xGap, xAxisRect.top() + 10));
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- painter.drawText(textRect, Qt::AlignCenter, xAxisNumbers[i]);
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- }
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- painter.drawPath(xAxisPath);
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-
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- //draw Y-Axis
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- QRect yAxisRect(QPoint(rect().left(), lineRect.top()), QPoint(lineRect.left(), lineRect.bottom()));
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- QPainterPath yAxisPath;
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- yAxisPath.moveTo(yAxisRect.right(), yAxisRect.bottom());
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- yAxisPath.lineTo(yAxisRect.right(), yAxisRect.top());
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- int yGap = yAxisRect.height() / Y_AXIS_GAP_AMOUNT;
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- for (int i = 0; i < 11; i++) {
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- yAxisPath.moveTo(yAxisRect.right() - Y_AXIS_NUMBER_LINE_LENGTH, yAxisRect.bottom() - i * yGap);
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- yAxisPath.lineTo(yAxisRect.right(), yAxisRect.bottom() - i * yGap);
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- textRect.moveCenter(QPoint(yAxisRect.right() - Y_AXIS_NUMBER_LINE_LENGTH - 20, yAxisRect.bottom() - i * yGap));
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- painter.drawText(textRect, Qt::AlignCenter, yAxisNumbers[i]);
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- }
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- painter.drawPath(yAxisPath);
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-
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-
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-
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-
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-
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-
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- painter.setPen(linePen);
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- double stregth_factorX = lineRect.width() / rangeGraphX;
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- double stregth_factorY = lineRect.height() / rangeGraphY;
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- for (LineGraphSeries lgs : seriesVec) {
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- linePen.setColor(lgs.color);
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- painter.setPen(linePen);
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- QPointF translation(lineRect.left(), lineRect.top());
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- if (!lgs.type == LineGraphSeries::Dot) {
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- QPainterPath painterPath;
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- painterPath.moveTo(transformPoint(lgs.data[0], stregth_factorX, stregth_factorY));
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- for(int i = 1; i < lgs.data.size(); i++) {
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- painterPath.lineTo(transformPoint(lgs.data[i], stregth_factorX, stregth_factorY));
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- }
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- painterPath.translate(translation);
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- painter.drawPath(painterPath);
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- }
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- /* only draw when circle can be seen*/
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- if (!(lineWidth > 4 * circleRadius || circleRadius == 0)) {
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- painter.setBrush(lgs.color);
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- for (int i = 0; i < lgs.data.size(); i++) {
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- painter.drawEllipse(transformPoint(lgs.data[i], stregth_factorX, stregth_factorY) + translation, circleRadius, circleRadius);
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- }
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- painter.setBrush(Qt::BrushStyle::NoBrush);
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- }
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- }
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-
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-}
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-
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-QPointF CustomLineGraph::transformPoint(QPointF& point, double stregth_factorX, double stregth_factorY)
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-{
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- return QPointF((point.x() - minGraphX)* stregth_factorX , (maxGraphY - point.y()) * stregth_factorY);
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-}
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-
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-void CustomLineGraph::calculateMinMaxGraphXY()
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-{
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- minGraphX = std::min_element(std::begin(seriesVec), std::end(seriesVec), [](const LineGraphSeries& a, const LineGraphSeries& b) -> bool {return a.minX < b.minX; })->minX;
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- maxGraphX = std::max_element(std::begin(seriesVec), std::end(seriesVec), [](const LineGraphSeries& a, const LineGraphSeries& b) -> bool {return a.maxX < b.maxX; })->maxX;
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- minGraphY = std::min_element(std::begin(seriesVec), std::end(seriesVec), [](const LineGraphSeries& a, const LineGraphSeries& b) -> bool {return a.minY < b.minY; })->minY;
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- maxGraphY = std::max_element(std::begin(seriesVec), std::end(seriesVec), [](const LineGraphSeries& a, const LineGraphSeries& b) -> bool {return a.maxY < b.maxY; })->maxY;
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- rangeGraphX = std::abs(maxGraphX - minGraphX);
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- rangeGraphY = std::abs(maxGraphY - minGraphY);
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- if (std::abs(rangeGraphX) < 0.01) {
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- minGraphX -= 1.0;
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- maxGraphX += 1.0;
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- rangeGraphX = 2;
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- }
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- if (std::abs(rangeGraphY) < 0.01) {
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- minGraphY -= 1.0;
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- maxGraphY += 1.0;
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- rangeGraphY = 2;
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- }
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-}
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-
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-void CustomLineGraph::popullateLineGraphSeries(std::vector<QPointF>& line, LineGraphSeries& lgs)
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-{
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- lgs.data = line;
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- auto pairX = std::minmax_element(std::begin(lgs.data), std::end(lgs.data), [](const QPointF& a, const QPointF& b) -> bool {return a.x() < b.x(); });
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- lgs.minX = pairX.first->x();
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- lgs.maxX = pairX.second->x();
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- auto pairY = std::minmax_element(std::begin(lgs.data), std::end(lgs.data), [](const QPointF& a, const QPointF& b) -> bool {return a.y() < b.y(); });
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- lgs.minY = pairY.first->y();
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- lgs.maxY = pairY.second->y();
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-}
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-
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-void CustomLineGraph::addSeries(std::vector<QPointF>& line, QColor color, LineGraphSeries::SeriesType type)
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-{
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- if (line.empty()) {
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- return;
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- }
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- LineGraphSeries lgs;
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- lgs.type = type;
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- popullateLineGraphSeries(line, lgs);
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- lgs.color = color;
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- seriesVec.push_back(lgs);
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- calculateMinMaxGraphXY();
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- generateAxisNumberStrings();
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-}
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-
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-QColor CustomLineGraph::generateNextColorForGraph()
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-{
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- /* http://devmag.org.za/2012/07/29/how-to-choose-colours-procedurally-algorithms/
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- use golden ratio 0.618033988749895f
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- */
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- hueoffset = std::fmod(hueoffset + 0.618033988749895f, 1.0);
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- return QColor::fromHsvF(hueoffset, 0.83, 1.0);
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-}
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-
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-void CustomLineGraph::generateAxisNumberStrings()
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-{
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- for (int i = 0; i < 11; i++) {
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- xAxisNumbers[i] = QString::number(minGraphX + i * (rangeGraphX / (double)X_AXIS_GAP_AMOUNT), 'f', 1);
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- yAxisNumbers[i] = QString::number(minGraphY + i * (rangeGraphY / (double)Y_AXIS_GAP_AMOUNT), 'f', 1);
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- }
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-}
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-
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-void CustomLineGraph::generateAndAddRandomLine()
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-{
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- std::random_device rd; //Will be used to obtain a seed for the random number engine
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- std::mt19937 gen(rd()); //Standard mersenne_twister_engine seeded with rd()
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-
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-
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- std::uniform_real_distribution<double> realDistr(-30, 30);
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- std::uniform_int_distribution<int> intScaleDistr(1, 3);
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-
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- for (int randomSeries = 0; randomSeries < 1; randomSeries++) {
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- std::vector<QPointF> randomPointVec(101);
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- int scale = intScaleDistr(gen);
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- for (int i = 0; i < randomPointVec.size(); i++) {
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- randomPointVec[i] = QPointF(i + 500, i * scale + realDistr(gen));
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- }
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- addLine(randomPointVec);
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- }
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-}
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-
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-void CustomLineGraph::addLine(std::vector<QPointF>& line)
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-{
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- addLine(line, generateNextColorForGraph());
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-}
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-
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-void CustomLineGraph::addLine(std::vector<QPointF>& line, QColor color)
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-{
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- addSeries(line, color, LineGraphSeries::Line);
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-}
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-
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-void CustomLineGraph::addDots(std::vector<QPointF>& dots)
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-{
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- addSeries(dots, generateNextColorForGraph(), LineGraphSeries::Dot);
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-}
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-
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-void CustomLineGraph::addDots(std::vector<QPointF>& dots, QColor color)
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-{
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- addSeries(dots, color, LineGraphSeries::Dot);
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-}
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