full chart widget

inc/graph/server/gui/chart/chart.h

@@ -5,6 +5,7 @@
 #include <QAction>
 #include <QMenu>
 #include <QMutex>
+#include <limits>
 
 namespace Graph::GUI {
 class ChartWidget : public QWidget {
@@ -19,18 +20,26 @@ class ChartWidget : public QWidget {
 
  protected:
   QSize sizeHint() const override;
-  void paintEvent(QPaintEvent *e) override;
+  void paintEvent(QPaintEvent* e) override;
 
  private:
   chart_spec_t spec;
   int decimateState = 0;
   QMutex mutex;
 
+  struct series_t {
+    double minX = std::numeric_limits<double>::max();
+    double maxX = std::numeric_limits<double>::min();
+    double minY = std::numeric_limits<double>::max();
+    double maxY = std::numeric_limits<double>::min();
     std::list<point_t> points;
+  };
+
+  std::map<std::string, series_t> series;
 
   double scaleX, scaleY;
   int marginX = 40;
-  int marginY = 20;
+  int marginY = 40;
   QPointF pointToCoord(const point_t& point);
 };
 

src/graph/server/gui/chart/chart.cpp

@@ -1,16 +1,10 @@
 #include <graph/server/gui/chart/chart.h>
 #include <graph/server/gui/mainwindow.h>
-#include <qbrush.h>
-#include <qnamespace.h>
-#include <qpoint.h>
-#include <qpolygon.h>
-#include <qsize.h>
 #include <QPainter>
 #include <iostream>
 #include <iterator>
 #include <limits>
 #include <string>
-#include "graph/plugins/plugin.h"
 
 #define MIN(a, b) (a < b ? a : b)
 #define MAX(a, b) (a > b ? a : b)
@@ -18,9 +12,13 @@
 namespace Graph::GUI {
 ChartWidget::ChartWidget(QWidget* parent, const chart_spec_t& spec) : QWidget(parent), spec(spec) {
   setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-
   setMinimumSize(QSize(600, 350));
 
+  for (const QString& name : spec.series) {
+    series.insert(std::pair<std::string, series_t>(name.toStdString(), series_t()));
+    std::cout << "create a series named " << name.toStdString() << std::endl;
+  }
+
   // context menu
   setContextMenuPolicy(Qt::ContextMenuPolicy::CustomContextMenu);
   connect(this, &QWidget::customContextMenuRequested, this, [this](const QPoint& pos) {
@@ -34,28 +32,33 @@ ChartWidget::~ChartWidget() {}
 void ChartWidget::addData(const char* seriesName, const point_t* points, unsigned long count) {
   QMutexLocker locker(&mutex);
 
-  double minX = std::numeric_limits<double>::max();
+  if (!this->series.contains(std::string(seriesName)))
-  double minY = std::numeric_limits<double>::max();
+    return;
-  double maxX = std::numeric_limits<double>::min();
+
-  double maxY = std::numeric_limits<double>::min();
+  series_t& series = this->series.at(std::string(seriesName));
+
+  series.minX = std::numeric_limits<double>::max();
+  series.minY = std::numeric_limits<double>::max();
+  series.maxX = std::numeric_limits<double>::min();
+  series.maxY = std::numeric_limits<double>::min();
 
   if (!spec.keep_all) {
     if (count >= spec.keep_limit) {
-      this->points.clear();
+      series.points.clear();
-    } else if (this->points.size() + count > spec.keep_limit) {
+    } else if (series.points.size() + count > spec.keep_limit) {
-      std::list<point_t>::iterator end = std::next(this->points.begin(), this->points.size() - (spec.keep_limit - count));
+      std::list<point_t>::iterator end = std::next(series.points.begin(), series.points.size() - (spec.keep_limit - count));
-      this->points.erase(this->points.begin(), end);
+      series.points.erase(series.points.begin(), end);
     }
   }
 
-  for (const point_t& point : this->points) {
+  for (const point_t& point : series.points) {
     if (spec.axis.x.auto_limit) {
-      minX = MIN(minX, point.x);
+      series.minX = MIN(series.minX, point.x);
-      maxX = MAX(maxX, point.x);
+      series.maxX = MAX(series.maxX, point.x);
     }
     if (spec.axis.y.auto_limit) {
-      minY = MIN(minY, point.y);
+      series.minY = MIN(series.minY, point.y);
-      maxY = MAX(maxY, point.y);
+      series.maxY = MAX(series.maxY, point.y);
     }
   }
 
@@ -65,33 +68,30 @@ void ChartWidget::addData(const char* seriesName, const point_t* points, unsigne
     if (decimateState++ % spec.decimate != 0)
       continue;
 
-    this->points.push_back(points[i]);
+    series.points.push_back(points[i]);
 
     if (spec.axis.x.auto_limit) {
-      minX = MIN(minX, points[i].x);
+      series.minX = MIN(series.minX, points[i].x);
-      maxX = MAX(maxX, points[i].x);
+      series.maxX = MAX(series.maxX, points[i].x);
     }
     if (spec.axis.y.auto_limit) {
-      minY = MIN(minY, points[i].y);
+      series.minY = MIN(series.minY, points[i].y);
-      maxY = MAX(maxY, points[i].y);
+      series.maxY = MAX(series.maxY, points[i].y);
     }
   }
 
-  if (spec.axis.x.auto_limit) {
-    spec.axis.x.min = minX;
-    spec.axis.x.max = maxX;
-  }
-  if (spec.axis.y.auto_limit) {
-    spec.axis.y.min = minY;
-    spec.axis.y.max = maxY;
-  }
-
   update();
 }
 
 void ChartWidget::clear() {
   QMutexLocker locker(&mutex);
-  points.clear();
+  for (auto& series : this->series) {
+    series.second.points.clear();
+    series.second.minX = std::numeric_limits<double>::max();
+    series.second.maxX = std::numeric_limits<double>::min();
+    series.second.minY = std::numeric_limits<double>::max();
+    series.second.maxY = std::numeric_limits<double>::min();
+  }
 }
 
 QSize ChartWidget::sizeHint() const {
@@ -104,9 +104,35 @@ QPointF ChartWidget::pointToCoord(const point_t& point) {
   return QPointF((point.x - spec.axis.x.min) * scaleX + marginX, height() - (point.y - spec.axis.y.min) * scaleY - marginY);
 }
 
+QColor interpolateColor(const QColor& a, const QColor& b, float ratio) {
+  return QColor(255 * (b.redF() * ratio + a.redF() * (1 - ratio)), 255 * (b.greenF() * ratio + a.greenF() * (1 - ratio)),
+                255 * (b.blueF() * ratio + a.blueF() * (1 - ratio)), 255 * (b.alphaF() * ratio + a.alphaF() * (1 - ratio)));
+}
+
 void ChartWidget::paintEvent(QPaintEvent* e) {
   QMutexLocker locker(&mutex);
 
+  // axis ranges
+  if (spec.axis.x.auto_limit) {
+    spec.axis.x.min = std::numeric_limits<double>::max();
+    spec.axis.x.max = std::numeric_limits<double>::min();
+  }
+  if (spec.axis.y.auto_limit) {
+    spec.axis.y.min = std::numeric_limits<double>::max();
+    spec.axis.y.max = std::numeric_limits<double>::min();
+  }
+
+  for (const auto& series : this->series) {
+    if (spec.axis.x.auto_limit) {
+      spec.axis.x.min = MIN(spec.axis.x.min, series.second.minX);
+      spec.axis.x.max = MAX(spec.axis.x.max, series.second.maxX);
+    }
+    if (spec.axis.y.auto_limit) {
+      spec.axis.y.min = MIN(spec.axis.y.min, series.second.minY);
+      spec.axis.y.max = MAX(spec.axis.y.max, series.second.maxY);
+    }
+  }
+
   QPainter painter(this);
 
   // background
@@ -119,15 +145,24 @@ void ChartWidget::paintEvent(QPaintEvent* e) {
 
   // limits
   // y max-mid-min
-  painter.drawText(QRect(0, marginY, marginX, marginY), Qt::AlignCenter, QString::number(spec.axis.y.max));
+  painter.drawText(QRect(marginX / 2, marginY, marginX / 2, marginY), Qt::AlignCenter, QString::number(spec.axis.y.max));
-  painter.drawText(QRect(0, height() / 2 - marginY / 2, marginX, marginY), Qt::AlignCenter, QString::number((spec.axis.y.max + spec.axis.y.min) / 2));
+  painter.drawText(QRect(marginX / 2, height() / 2 - marginY / 2, marginX / 2, marginY), Qt::AlignCenter,
-  painter.drawText(QRect(0, height() - marginY * 2, marginX, marginY), Qt::AlignCenter, QString::number(spec.axis.y.min));
+                   QString::number((spec.axis.y.max + spec.axis.y.min) / 2));
+  painter.drawText(QRect(marginX / 2, height() - marginY * 2, marginX / 2, marginY), Qt::AlignCenter, QString::number(spec.axis.y.min));
 
   // x min-mid-max
-  painter.drawText(QRect(marginX, height() - marginY, marginX, marginY), Qt::AlignCenter, QString::number(spec.axis.x.min));
+  painter.drawText(QRect(marginX, height() - marginY, marginX, marginY / 2), Qt::AlignCenter, QString::number(spec.axis.x.min));
-  painter.drawText(QRect(width() / 2 - marginX / 2, height() - marginY, marginX, marginY), Qt::AlignCenter,
+  painter.drawText(QRect(width() / 2 - marginX / 2, height() - marginY, marginX, marginY / 2), Qt::AlignCenter,
                    QString::number((spec.axis.x.min + spec.axis.x.max) / 2));
-  painter.drawText(QRect(width() - marginX * 2, height() - marginY, marginX, marginY), Qt::AlignCenter, QString::number(spec.axis.x.max));
+  painter.drawText(QRect(width() - marginX * 2, height() - marginY, marginX, marginY / 2), Qt::AlignCenter, QString::number(spec.axis.x.max));
+
+  // axis labels
+  painter.drawText(QRect(0, height() - marginY / 2, width(), marginY / 2), Qt::AlignCenter, spec.axis.x.label);
+  painter.save();
+  painter.rotate(-90);
+  painter.translate(-height(), 0);
+  painter.drawText(QRect(0, 0, height(), marginX / 2), Qt::AlignCenter, spec.axis.y.label);
+  painter.restore();
 
   // grid
   if (spec.grid) {
@@ -150,14 +185,29 @@ void ChartWidget::paintEvent(QPaintEvent* e) {
 
   painter.setPen(QPen(Qt::black, 1));
 
+  int i = 0;
+  for (const auto& series : this->series) {
     QPolygonF polygon;
-  for (const point_t point : points) {
+    for (const point_t point : series.second.points) {
       // TODO: only paint visible points
       //       (+ 1-1 before and after)
       polygon << pointToCoord(point);
     }
 
+    painter.setBrush(interpolateColor(Qt::darkBlue, Qt::green, i / (float)this->series.size()));
+    painter.setPen(interpolateColor(Qt::darkBlue, Qt::green, i / (float)this->series.size()));
+
+    // line
     painter.drawPolyline(polygon);
+
+    // legend
+    if (spec.legend) {
+      painter.fillRect(QRect(marginX + 5, marginY + 5 + i * 15, 10, 10), painter.brush());
+      painter.drawText(QRect(marginX + 17, marginY + 2 + i * 15, width() - 2 * marginX, 15), QString::fromStdString(series.first));
+    }
+
+    i++;
+  }
 }
 
 ContextMenu::ContextMenu(QWidget* parent, ChartWidget* chartWidget) : QMenu(parent) {
@@ -169,11 +219,11 @@ ContextMenu::ContextMenu(QWidget* parent, ChartWidget* chartWidget) : QMenu(pare
   connect(clear, &QAction::triggered, this, [chartWidget]() { chartWidget->clear(); });
   addAction(clear);
 
-  edit = new QAction(tr("&Edit"), this);
+  // edit = new QAction(tr("&Edit"), this);
-  connect(edit, &QAction::triggered, this, []() {
+  // connect(edit, &QAction::triggered, this, []() {
-    // TODO: implement chart editing
+  //   // TODO: implement chart editing
-  });
+  // });
-  addAction(edit);
+  // addAction(edit);
 }
 
 ContextMenu::~ContextMenu() {}

test/test.py

@@ -1,7 +1,7 @@
 #!/bin/env python3
 
 import requests
-from math import sin
+from math import sin, cos
 from time import sleep
 import numpy as np
 from argparse import ArgumentParser
@@ -17,6 +17,16 @@ def sine(args):
     except KeyboardInterrupt:
       break
 
+def cosine(args):
+  x = 0.0
+  while True:
+    try:
+      requests.get(f"http://{args.address}:{args.port}/add?chart={args.chart}&series={args.series}&x={x}&y={cos(x)}")
+      x += 0.01
+      sleep(0.01)
+    except KeyboardInterrupt:
+      break
+
 def sine_array(args):
   start = 0
   while True:
@@ -80,7 +90,7 @@ def star(args):
 
 if __name__ == "__main__":
   parser = ArgumentParser()
-  parser.add_argument("-t", action="store", dest="test",    help="test type", type=str, choices=["sine", "sine_array", "star"], required=False, default="sin")
+  parser.add_argument("-t", action="store", dest="test",    help="test type", type=str, choices=["sine", "cosine", "sine_array", "star"], required=False, default="sine")
   parser.add_argument("-n", action="store", dest="num",     help="sin_array size/iteration", type=int, required=False, default=100)
   parser.add_argument("-d", action="store", dest="delay",   help="delay between iteration", type=float, required=False, default=0.25)
   parser.add_argument("-c", action="store", dest="chart",   help="chart id", type=int, required=True)
@@ -91,6 +101,8 @@ if __name__ == "__main__":
   args = parser.parse_args()
   if args.test == "sine":
     sine(args)
+  if args.test == "cosine":
+    cosine(args)
   elif args.test == "sine_array":
     sine_array(args)
   elif args.test == "star":