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安装
在 https://www.qcustomplot.com/index.php/download 下载压缩包。qcustomplot.h和qcustomplot.cpp即为需要使用的文件。然后自己新建一个QWidget，要么继承自QCustomPlot这个类，要么做提升。
备注 笔者使用环境是Windows 7 . 编译器是Vistual Studio 2015(构建套件是vs2013)
部分类说明
QCPGraph
图表 通过调用 QCPGraph的setData设置绘图需要的数据 添加一个QCPGraph就可以绘制一条数据线 调用QCustomPlot::addGraph添加一个数据线
QCPAxis
QCustomPlot 有四个坐标轴 xAxis(底部轴), yAxis(左部轴), xAxis2(顶部轴),yAxis2(右部轴) 可以用setVisible来控制其是否可见
QCPAxisTicker
坐标轴上面显示刻度的位置和内容 每个坐标轴都持有一个内置的 QCPAxisTicker(或者是其子类)
配置记录
Qt Creator配置QCustomplot
在.pro中添加模块printsupport
需在.pro文件中添加 QT += printsupport 打印模块支持，否则编译报错。（Qt5以上版本）
VS配置QCustomPlot
![QCustomPlot配置[通俗易懂]](https://img-blog.csdnimg.cn/20210320191356587.png)
![QCustomPlot配置[通俗易懂]](http://javaforall.cn/wp-content/themes/justnews/themer/assets/images/lazy.png)
同样需要配置打印支持模块。如下
右键项目，点击属性
依次选择 配置属性 -> 链接器 -> 输入 -> 附加依赖项
在其中添加 依赖库 Qt5PrintSupportd.lib
![QCustomPlot配置[通俗易懂]](https://img-blog.csdnimg.cn/20210320191718856.png)
![QCustomPlot配置[通俗易懂]](https://img-blog.csdnimg.cn/20210320191800236.png)
至此，配置完毕
官方教程示例
头文件
/***************************************************************************
** **
** QCustomPlot, an easy to use, modern plotting widget for Qt **
** Copyright (C) 2011-2018 Emanuel Eichhammer **
** **
** 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 http://www.gnu.org/licenses/. **
** **
****************************************************************************
** Author: Emanuel Eichhammer **
** Website/Contact: http://www.qcustomplot.com/ **
** Date: 25.06.18 **
** Version: 2.0.1 **
****************************************************************************/
/************************************************************************************************************
** **
** This is the example code for QCustomPlot. **
** **
** It demonstrates basic and some advanced capabilities of the widget. The interesting code is inside **
** the "setup(...)Demo" functions of MainWindow. **
** **
** In order to see a demo in action, call the respective "setup(...)Demo" function inside the **
** MainWindow constructor. Alternatively you may call setupDemo(i) where i is the index of the demo **
** you want (for those, see MainWindow constructor comments). All other functions here are merely a **
** way to easily create screenshots of all demos for the website. I.e. a timer is set to successively **
** setup all the demos and make a screenshot of the window area and save it in the ./screenshots **
** directory. **
** **
*************************************************************************************************************/
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QTimer>
#include "qcustomplot.h"
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void setupDemo(int demoIndex);
void setupQuadraticDemo(QCustomPlot *customPlot);
void setupSimpleDemo(QCustomPlot *customPlot);
void setupSincScatterDemo(QCustomPlot *customPlot);
void setupScatterStyleDemo(QCustomPlot *customPlot);
void setupLineStyleDemo(QCustomPlot *customPlot);
void setupScatterPixmapDemo(QCustomPlot *customPlot);
void setupDateDemo(QCustomPlot *customPlot);
void setupTextureBrushDemo(QCustomPlot *customPlot);
void setupMultiAxisDemo(QCustomPlot *customPlot);
void setupLogarithmicDemo(QCustomPlot *customPlot);
void setupRealtimeDataDemo(QCustomPlot *customPlot);
void setupParametricCurveDemo(QCustomPlot *customPlot);
void setupBarChartDemo(QCustomPlot *customPlot);
void setupStatisticalDemo(QCustomPlot *customPlot);
void setupSimpleItemDemo(QCustomPlot *customPlot);
void setupItemDemo(QCustomPlot *customPlot);
void setupStyledDemo(QCustomPlot *customPlot);
void setupAdvancedAxesDemo(QCustomPlot *customPlot);
void setupColorMapDemo(QCustomPlot *customPlot);
void setupFinancialDemo(QCustomPlot *customPlot);
void setupPlayground(QCustomPlot *customPlot);
private slots:
void realtimeDataSlot();
void bracketDataSlot();
void screenShot();
void allScreenShots();
private:
Ui::MainWindow *ui;
QString demoName;
QTimer dataTimer;
QCPItemTracer *itemDemoPhaseTracer;
int currentDemoIndex;
};
#endif // MAINWINDOW_H
UI文件
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>548</width>
<height>420</height>
</rect>
</property>
<property name="windowTitle">
<string>QCustomPlot plot examples</string>
</property>
<widget class="QWidget" name="centralWidget">
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<widget class="QCustomPlot" name="customPlot" native="true"/>
</item>
</layout>
</widget>
<widget class="QStatusBar" name="statusBar"/>
</widget>
<layoutdefault spacing="6" margin="11"/>
<customwidgets>
<customwidget>
<class>QCustomPlot</class>
<extends>QWidget</extends>
<header>../../qcustomplot.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>
源文件(CPP文件)
/***************************************************************************
** **
** QCustomPlot, an easy to use, modern plotting widget for Qt **
** Copyright (C) 2011-2018 Emanuel Eichhammer **
** **
** 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 http://www.gnu.org/licenses/. **
** **
****************************************************************************
** Author: Emanuel Eichhammer **
** Website/Contact: http://www.qcustomplot.com/ **
** Date: 25.06.18 **
** Version: 2.0.1 **
****************************************************************************/
/************************************************************************************************************
** **
** This is the example code for QCustomPlot. **
** **
** It demonstrates basic and some advanced capabilities of the widget. The interesting code is inside **
** the "setup(...)Demo" functions of MainWindow. **
** **
** In order to see a demo in action, call the respective "setup(...)Demo" function inside the **
** MainWindow constructor. Alternatively you may call setupDemo(i) where i is the index of the demo **
** you want (for those, see MainWindow constructor comments). All other functions here are merely a **
** way to easily create screenshots of all demos for the website. I.e. a timer is set to successively **
** setup all the demos and make a screenshot of the window area and save it in the ./screenshots **
** directory. **
** **
*************************************************************************************************************/
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <QDesktopWidget>
#include <QScreen>
#include <QMessageBox>
#include <QMetaEnum>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
setGeometry(400, 250, 542, 390);
setupDemo(1);
//setupPlayground(ui->customPlot);
// 0: setupQuadraticDemo(ui->customPlot);
// 1: setupSimpleDemo(ui->customPlot);
// 2: setupSincScatterDemo(ui->customPlot);
// 3: setupScatterStyleDemo(ui->customPlot);
// 4: setupScatterPixmapDemo(ui->customPlot);
// 5: setupLineStyleDemo(ui->customPlot);
// 6: setupDateDemo(ui->customPlot);
// 7: setupTextureBrushDemo(ui->customPlot);
// 8: setupMultiAxisDemo(ui->customPlot);
// 9: setupLogarithmicDemo(ui->customPlot);
// 10: setupRealtimeDataDemo(ui->customPlot);
// 11: setupParametricCurveDemo(ui->customPlot);
// 12: setupBarChartDemo(ui->customPlot);
// 13: setupStatisticalDemo(ui->customPlot);
// 14: setupSimpleItemDemo(ui->customPlot);
// 15: setupItemDemo(ui->customPlot);
// 16: setupStyledDemo(ui->customPlot);
// 17: setupAdvancedAxesDemo(ui->customPlot);
// 18: setupColorMapDemo(ui->customPlot);
// 19: setupFinancialDemo(ui->customPlot);
// for making screenshots of the current demo or all demos (for website screenshots):
//QTimer::singleShot(1500, this, SLOT(allScreenShots()));
//QTimer::singleShot(4000, this, SLOT(screenShot()));
}
void MainWindow::setupDemo(int demoIndex)
{
switch (demoIndex)
{
case 0: setupQuadraticDemo(ui->customPlot); break;
case 1: setupSimpleDemo(ui->customPlot); break;
case 2: setupSincScatterDemo(ui->customPlot); break;
case 3: setupScatterStyleDemo(ui->customPlot); break;
case 4: setupScatterPixmapDemo(ui->customPlot); break;
case 5: setupLineStyleDemo(ui->customPlot); break;
case 6: setupDateDemo(ui->customPlot); break;
case 7: setupTextureBrushDemo(ui->customPlot); break;
case 8: setupMultiAxisDemo(ui->customPlot); break;
case 9: setupLogarithmicDemo(ui->customPlot); break;
case 10: setupRealtimeDataDemo(ui->customPlot); break;
case 11: setupParametricCurveDemo(ui->customPlot); break;
case 12: setupBarChartDemo(ui->customPlot); break;
case 13: setupStatisticalDemo(ui->customPlot); break;
case 14: setupSimpleItemDemo(ui->customPlot); break;
case 15: setupItemDemo(ui->customPlot); break;
case 16: setupStyledDemo(ui->customPlot); break;
case 17: setupAdvancedAxesDemo(ui->customPlot); break;
case 18: setupColorMapDemo(ui->customPlot); break;
case 19: setupFinancialDemo(ui->customPlot); break;
}
setWindowTitle("QCustomPlot: "+demoName);
statusBar()->clearMessage();
currentDemoIndex = demoIndex;
ui->customPlot->replot();
}
void MainWindow::setupQuadraticDemo(QCustomPlot *customPlot)
{
demoName = "Quadratic Demo";
// generate some data:
QVector<double> x(101), y(101); // initialize with entries 0..100
for (int i=0; i<101; ++i)
{
x[i] = i/50.0f - 1; // x goes from -1 to 1
y[i] = x[i]*x[i]; // let's plot a quadratic function
}
// create graph and assign data to it:
customPlot->addGraph();//创建一个画布
customPlot->graph(0)->setPen(QPen(Qt::blue)); // line color blue for first graph
customPlot->graph(0)->setData(x, y);//设置绘图数据
// give the axes some labels:
customPlot->xAxis->setLabel("x");//底部轴
customPlot->yAxis->setLabel("y");//左部轴
// set axes ranges, so we see all data:
customPlot->xAxis->setRange(-1, 1);
customPlot->yAxis->setRange(0, 1);
auto mainGraph = customPlot->graph(0);
mainGraph->setLineStyle(QCPGraph::lsStepLeft);
}
void MainWindow::setupSimpleDemo(QCustomPlot *customPlot)
{
demoName = "Simple Demo";
// add two new graphs and set their look:
customPlot->addGraph();//画布叠加
customPlot->graph(0)->setPen(QPen(Qt::blue)); // line color blue for first graph
customPlot->graph(0)->setBrush(QBrush(QColor(0, 0, 255, 20))); // first graph will be filled with translucent blue
customPlot->addGraph();
customPlot->graph(1)->setPen(QPen(Qt::red)); // line color red for second graph
// generate some points of data (y0 for first, y1 for second graph):
QVector<double> x(251), y0(251), y1(251);
for (int i=0; i<251; ++i)
{
x[i] = i;
y0[i] = qExp(-i/150.0)*qCos(i/10.0); // exponentially decaying cosine
y1[i] = qExp(-i/150.0); // exponential envelope
}
// configure right and top axis to show ticks but no labels:
// (see QCPAxisRect::setupFullAxesBox for a quicker method to do this)
customPlot->xAxis2->setVisible(true);
customPlot->xAxis2->setTickLabels(false);
customPlot->yAxis2->setVisible(true);
customPlot->yAxis2->setTickLabels(false);
// make left and bottom axes always transfer their ranges to right and top axes:
connect(customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->xAxis2, SLOT(setRange(QCPRange)));
connect(customPlot->yAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->yAxis2, SLOT(setRange(QCPRange)));
// pass data points to graphs:
customPlot->graph(0)->setData(x, y0);
customPlot->graph(1)->setData(x, y1);
// let the ranges scale themselves so graph 0 fits perfectly in the visible area:
customPlot->graph(0)->rescaleAxes();
// same thing for graph 1, but only enlarge ranges (in case graph 1 is smaller than graph 0):
customPlot->graph(1)->rescaleAxes(true);
// customPlot->graph(1)->setVisible(false);
// Note: we could have also just called customPlot->rescaleAxes(); instead
// Allow user to drag axis ranges with mouse, zoom with mouse wheel and select graphs by clicking:
customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectPlottables);
}
void MainWindow::setupSincScatterDemo(QCustomPlot *customPlot)
{
demoName = "Sinc Scatter Demo";
customPlot->legend->setVisible(true);
customPlot->legend->setFont(QFont("Helvetica",9));
// set locale to english, so we get english decimal separator:
customPlot->setLocale(QLocale(QLocale::English, QLocale::UnitedKingdom));
// add confidence band graphs:
customPlot->addGraph();
QPen pen;
pen.setStyle(Qt::DotLine);
pen.setWidth(1);
pen.setColor(QColor(180,180,180));
customPlot->graph(0)->setName("Confidence Band 68%");
customPlot->graph(0)->setPen(pen);
customPlot->graph(0)->setBrush(QBrush(QColor(255,50,30,20)));
customPlot->addGraph();
customPlot->legend->removeItem(customPlot->legend->itemCount()-1); // don't show two confidence band graphs in legend
customPlot->graph(1)->setPen(pen);
customPlot->graph(0)->setChannelFillGraph(customPlot->graph(1));
// add theory curve graph:
customPlot->addGraph();
pen.setStyle(Qt::DashLine);
pen.setWidth(2);
pen.setColor(Qt::red);
customPlot->graph(2)->setPen(pen);
customPlot->graph(2)->setName("Theory Curve");
// add data point graph:
customPlot->addGraph();
customPlot->graph(3)->setPen(QPen(Qt::blue));
customPlot->graph(3)->setLineStyle(QCPGraph::lsNone);
customPlot->graph(3)->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCross, 4));
// add error bars:
QCPErrorBars *errorBars = new QCPErrorBars(customPlot->xAxis, customPlot->yAxis);
errorBars->removeFromLegend();
errorBars->setAntialiased(false);
errorBars->setDataPlottable(customPlot->graph(3));
errorBars->setPen(QPen(QColor(180,180,180)));
customPlot->graph(3)->setName("Measurement");
// generate ideal sinc curve data and some randomly perturbed data for scatter plot:
QVector<double> x0(250), y0(250);
QVector<double> yConfUpper(250), yConfLower(250);
for (int i=0; i<250; ++i)
{
x0[i] = (i/249.0-0.5)*30+0.01; // by adding a small offset we make sure not do divide by zero in next code line
y0[i] = qSin(x0[i])/x0[i]; // sinc function
yConfUpper[i] = y0[i]+0.15;
yConfLower[i] = y0[i]-0.15;
x0[i] *= 1000;
}
QVector<double> x1(50), y1(50), y1err(50);
for (int i=0; i<50; ++i)
{
// generate a gaussian distributed random number:
double tmp1 = rand()/(double)RAND_MAX;
double tmp2 = rand()/(double)RAND_MAX;
double r = qSqrt(-2*qLn(tmp1))*qCos(2*M_PI*tmp2); // box-muller transform for gaussian distribution
// set y1 to value of y0 plus a random gaussian pertubation:
x1[i] = (i/50.0-0.5)*30+0.25;
y1[i] = qSin(x1[i])/x1[i]+r*0.15;
x1[i] *= 1000;
y1err[i] = 0.15;
}
// pass data to graphs and let QCustomPlot determine the axes ranges so the whole thing is visible:
customPlot->graph(0)->setData(x0, yConfUpper);
customPlot->graph(1)->setData(x0, yConfLower);
customPlot->graph(2)->setData(x0, y0);
customPlot->graph(3)->setData(x1, y1);
errorBars->setData(y1err);
customPlot->graph(2)->rescaleAxes();
customPlot->graph(3)->rescaleAxes(true);
// setup look of bottom tick labels:
customPlot->xAxis->setTickLabelRotation(30);
customPlot->xAxis->ticker()->setTickCount(9);
customPlot->xAxis->setNumberFormat("ebc");
customPlot->xAxis->setNumberPrecision(1);
customPlot->xAxis->moveRange(-10);
// make top right axes clones of bottom left axes. Looks prettier:
customPlot->axisRect()->setupFullAxesBox();
}
void MainWindow::setupScatterStyleDemo(QCustomPlot *customPlot)
{
demoName = "Scatter Style Demo";
customPlot->legend->setVisible(true);
customPlot->legend->setFont(QFont("Helvetica", 9));
customPlot->legend->setRowSpacing(-3);
QVector<QCPScatterStyle::ScatterShape> shapes;
shapes << QCPScatterStyle::ssCross;
shapes << QCPScatterStyle::ssPlus;
shapes << QCPScatterStyle::ssCircle;
shapes << QCPScatterStyle::ssDisc;
shapes << QCPScatterStyle::ssSquare;
shapes << QCPScatterStyle::ssDiamond;
shapes << QCPScatterStyle::ssStar;
shapes << QCPScatterStyle::ssTriangle;
shapes << QCPScatterStyle::ssTriangleInverted;
shapes << QCPScatterStyle::ssCrossSquare;
shapes << QCPScatterStyle::ssPlusSquare;
shapes << QCPScatterStyle::ssCrossCircle;
shapes << QCPScatterStyle::ssPlusCircle;
shapes << QCPScatterStyle::ssPeace;
shapes << QCPScatterStyle::ssCustom;
QPen pen;
// add graphs with different scatter styles:
for (int i=0; i<shapes.size(); ++i)
{
customPlot->addGraph();
pen.setColor(QColor(qSin(i*0.3)*100+100, qSin(i*0.6+0.7)*100+100, qSin(i*0.4+0.6)*100+100));
// generate data:
QVector<double> x(10), y(10);
for (int k=0; k<10; ++k)
{
x[k] = k/10.0 * 4*3.14 + 0.01;
y[k] = 7*qSin(x[k])/x[k] + (shapes.size()-i)*5;
}
customPlot->graph()->setData(x, y);
customPlot->graph()->rescaleAxes(true);
customPlot->graph()->setPen(pen);
customPlot->graph()->setName(QCPScatterStyle::staticMetaObject.enumerator(QCPScatterStyle::staticMetaObject.indexOfEnumerator("ScatterShape")).valueToKey(shapes.at(i)));
customPlot->graph()->setLineStyle(QCPGraph::lsLine);
// set scatter style:
if (shapes.at(i) != QCPScatterStyle::ssCustom)
{
customPlot->graph()->setScatterStyle(QCPScatterStyle(shapes.at(i), 10));
}
else
{
QPainterPath customScatterPath;
for (int i=0; i<3; ++i)
customScatterPath.cubicTo(qCos(2*M_PI*i/3.0)*9, qSin(2*M_PI*i/3.0)*9, qCos(2*M_PI*(i+0.9)/3.0)*9, qSin(2*M_PI*(i+0.9)/3.0)*9, 0, 0);
customPlot->graph()->setScatterStyle(QCPScatterStyle(customScatterPath, QPen(Qt::black, 0), QColor(40, 70, 255, 50), 10));
}
}
// set blank axis lines:
customPlot->rescaleAxes();
customPlot->xAxis->setTicks(false);
customPlot->yAxis->setTicks(false);
customPlot->xAxis->setTickLabels(false);
customPlot->yAxis->setTickLabels(false);
// make top right axes clones of bottom left axes:
customPlot->axisRect()->setupFullAxesBox();
}
void MainWindow::setupLineStyleDemo(QCustomPlot *customPlot)
{
demoName = "Line Style Demo";
customPlot->legend->setVisible(true);
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)
{
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));
customPlot->graph()->setPen(pen);
customPlot->graph()->setName(lineNames.at(i-QCPGraph::lsNone));
customPlot->graph()->setLineStyle((QCPGraph::LineStyle)i);
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;
}
customPlot->graph()->setData(x, y);
customPlot->graph()->rescaleAxes(true);
}
// zoom out a bit:
customPlot->yAxis->scaleRange(1.1, customPlot->yAxis->range().center());
customPlot->xAxis->scaleRange(1.1, customPlot->xAxis->range().center());
// set blank axis lines:
customPlot->xAxis->setTicks(false);
customPlot->yAxis->setTicks(true);
customPlot->xAxis->setTickLabels(false);
customPlot->yAxis->setTickLabels(true);
// make top right axes clones of bottom left axes:
customPlot->axisRect()->setupFullAxesBox();
}
void MainWindow::setupScatterPixmapDemo(QCustomPlot *customPlot)
{
demoName = "Scatter Pixmap Demo";
customPlot->axisRect()->setBackground(QPixmap("./solarpanels.jpg"));
customPlot->addGraph();
customPlot->graph()->setLineStyle(QCPGraph::lsLine);
QPen pen;
pen.setColor(QColor(255, 200, 20, 200));
pen.setStyle(Qt::DashLine);
pen.setWidthF(2.5);
customPlot->graph()->setPen(pen);
customPlot->graph()->setBrush(QBrush(QColor(255,200,20,70)));
customPlot->graph()->setScatterStyle(QCPScatterStyle(QPixmap("./sun.png")));
// set graph name, will show up in legend next to icon:
customPlot->graph()->setName("Data from Photovoltaic\nenergy barometer 2011");
// set data:
QVector<double> year, value;
year << 2005 << 2006 << 2007 << 2008 << 2009 << 2010 << 2011;
value << 2.17 << 3.42 << 4.94 << 10.38 << 15.86 << 29.33 << 52.1;
customPlot->graph()->setData(year, value);
// set title of plot:
customPlot->plotLayout()->insertRow(0);
customPlot->plotLayout()->addElement(0, 0, new QCPTextElement(customPlot, "Regenerative Energies", QFont("sans", 12, QFont::Bold)));
// axis configurations:
customPlot->xAxis->setLabel("Year");
customPlot->yAxis->setLabel("Installed Gigawatts of\nphotovoltaic in the European Union");
customPlot->xAxis2->setVisible(true);
customPlot->yAxis2->setVisible(true);
customPlot->xAxis2->setTickLabels(false);
customPlot->yAxis2->setTickLabels(false);
customPlot->xAxis2->setTicks(false);
customPlot->yAxis2->setTicks(false);
customPlot->xAxis2->setSubTicks(false);
customPlot->yAxis2->setSubTicks(false);
customPlot->xAxis->setRange(2004.5, 2011.5);
customPlot->yAxis->setRange(0, 52);
// setup legend:
customPlot->legend->setFont(QFont(font().family(), 7));
customPlot->legend->setIconSize(50, 20);
customPlot->legend->setVisible(true);
customPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignLeft | Qt::AlignTop);
}
void MainWindow::setupDateDemo(QCustomPlot *customPlot)
{
demoName = "Date Demo";
// set locale to english, so we get english month names:
customPlot->setLocale(QLocale(QLocale::English, QLocale::UnitedKingdom));
// seconds of current time, we'll use it as starting point in time for data:
double now = QDateTime::currentDateTime().toTime_t();
srand(8); // set the random seed, so we always get the same random data
// create multiple graphs:
for (int gi=0; gi<5; ++gi)
{
customPlot->addGraph();
QColor color(20+200/4.0*gi,70*(1.6-gi/4.0), 150, 150);
customPlot->graph()->setLineStyle(QCPGraph::lsLine);
customPlot->graph()->setPen(QPen(color.lighter(200)));
customPlot->graph()->setBrush(QBrush(color));
// generate random walk data:
QVector<QCPGraphData> timeData(250);
for (int i=0; i<250; ++i)
{
timeData[i].key = now + 24*3600*i;
if (i == 0)
timeData[i].value = (i/50.0+1)*(rand()/(double)RAND_MAX-0.5);
else
timeData[i].value = qFabs(timeData[i-1].value)*(1+0.02/4.0*(4-gi)) + (i/50.0+1)*(rand()/(double)RAND_MAX-0.5);
}
customPlot->graph()->data()->set(timeData);
}
// configure bottom axis to show date instead of number:
QSharedPointer<QCPAxisTickerDateTime> dateTicker(new QCPAxisTickerDateTime);
dateTicker->setDateTimeFormat("d. MMMM\nyyyy");
customPlot->xAxis->setTicker(dateTicker);
// configure left axis text labels:
QSharedPointer<QCPAxisTickerText> textTicker(new QCPAxisTickerText);
textTicker->addTick(10, "a bit\nlow");
textTicker->addTick(50, "quite\nhigh");
customPlot->yAxis->setTicker(textTicker);
// set a more compact font size for bottom and left axis tick labels:
customPlot->xAxis->setTickLabelFont(QFont(QFont().family(), 8));
customPlot->yAxis->setTickLabelFont(QFont(QFont().family(), 8));
// set axis labels:
customPlot->xAxis->setLabel("Date");
customPlot->yAxis->setLabel("Random wobbly lines value");
// make top and right axes visible but without ticks and labels:
customPlot->xAxis2->setVisible(true);
customPlot->yAxis2->setVisible(true);
customPlot->xAxis2->setTicks(false);
customPlot->yAxis2->setTicks(false);
customPlot->xAxis2->setTickLabels(false);
customPlot->yAxis2->setTickLabels(false);
// set axis ranges to show all data:
customPlot->xAxis->setRange(now, now+24*3600*249);
customPlot->yAxis->setRange(0, 60);
// show legend with slightly transparent background brush:
customPlot->legend->setVisible(true);
customPlot->legend->setBrush(QColor(255, 255, 255, 150));
}
void MainWindow::setupTextureBrushDemo(QCustomPlot *customPlot)
{
demoName = "Texture Brush Demo";
// add two graphs with a textured fill:
customPlot->addGraph();
QPen redDotPen;
redDotPen.setStyle(Qt::DotLine);
redDotPen.setColor(QColor(170, 100, 100, 180));
redDotPen.setWidthF(2);
customPlot->graph(0)->setPen(redDotPen);
customPlot->graph(0)->setBrush(QBrush(QPixmap("./balboa.jpg"))); // fill with texture of specified image
customPlot->addGraph();
customPlot->graph(1)->setPen(QPen(Qt::red));
// activate channel fill for graph 0 towards graph 1:
customPlot->graph(0)->setChannelFillGraph(customPlot->graph(1));
// generate data:
QVector<double> x(250);
QVector<double> y0(250), y1(250);
for (int i=0; i<250; ++i)
{
// just playing with numbers, not much to learn here
x[i] = 3*i/250.0;
y0[i] = 1+qExp(-x[i]*x[i]*0.8)*(x[i]*x[i]+x[i]);
y1[i] = 1-qExp(-x[i]*x[i]*0.4)*(x[i]*x[i])*0.1;
}
// pass data points to graphs:
customPlot->graph(0)->setData(x, y0);
customPlot->graph(1)->setData(x, y1);
// activate top and right axes, which are invisible by default:
customPlot->xAxis2->setVisible(true);
customPlot->yAxis2->setVisible(true);
// make tick labels invisible on top and right axis:
customPlot->xAxis2->setTickLabels(false);
customPlot->yAxis2->setTickLabels(false);
// set ranges:
customPlot->xAxis->setRange(0, 2.5);
customPlot->yAxis->setRange(0.9, 1.6);
// assign top/right axes same properties as bottom/left:
customPlot->axisRect()->setupFullAxesBox();
}
void MainWindow::setupMultiAxisDemo(QCustomPlot *customPlot)
{
customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
demoName = "Multi Axis Demo";
customPlot->setLocale(QLocale(QLocale::English, QLocale::UnitedKingdom)); // period as decimal separator and comma as thousand separator
customPlot->legend->setVisible(true);
QFont legendFont = font(); // start out with MainWindow's font..
legendFont.setPointSize(9); // and make a bit smaller for legend
customPlot->legend->setFont(legendFont);
customPlot->legend->setBrush(QBrush(QColor(255,255,255,230)));
// by default, the legend is in the inset layout of the main axis rect. So this is how we access it to change legend placement:
customPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignBottom|Qt::AlignRight);
// setup for graph 0: key axis left, value axis bottom
// will contain left maxwell-like function
customPlot->addGraph(customPlot->yAxis, customPlot->xAxis);
customPlot->graph(0)->setPen(QPen(QColor(255, 100, 0)));
customPlot->graph(0)->setBrush(QBrush(QPixmap("./balboa.jpg"))); // fill with texture of specified image
customPlot->graph(0)->setLineStyle(QCPGraph::lsLine);
customPlot->graph(0)->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssDisc, 5));
customPlot->graph(0)->setName("Left maxwell function");
// setup for graph 1: key axis bottom, value axis left (those are the default axes)
// will contain bottom maxwell-like function with error bars
customPlot->addGraph();
customPlot->graph(1)->setPen(QPen(Qt::red));
customPlot->graph(1)->setBrush(QBrush(QPixmap("./balboa.jpg"))); // same fill as we used for graph 0
customPlot->graph(1)->setLineStyle(QCPGraph::lsStepCenter);
customPlot->graph(1)->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, Qt::red, Qt::white, 7));
customPlot->graph(1)->setName("Bottom maxwell function");
QCPErrorBars *errorBars = new QCPErrorBars(customPlot->xAxis, customPlot->yAxis);
errorBars->removeFromLegend();
errorBars->setDataPlottable(customPlot->graph(1));
// setup for graph 2: key axis top, value axis right
// will contain high frequency sine with low frequency beating:
customPlot->addGraph(customPlot->xAxis2, customPlot->yAxis2);
customPlot->graph(2)->setPen(QPen(Qt::blue));
customPlot->graph(2)->setName("High frequency sine");
// setup for graph 3: same axes as graph 2
// will contain low frequency beating envelope of graph 2
customPlot->addGraph(customPlot->xAxis2, customPlot->yAxis2);
QPen blueDotPen;
blueDotPen.setColor(QColor(30, 40, 255, 150));
blueDotPen.setStyle(Qt::DotLine);
blueDotPen.setWidthF(4);
customPlot->graph(3)->setPen(blueDotPen);
customPlot->graph(3)->setName("Sine envelope");
// setup for graph 4: key axis right, value axis top
// will contain parabolically distributed data points with some random perturbance
customPlot->addGraph(customPlot->yAxis2, customPlot->xAxis2);
customPlot->graph(4)->setPen(QColor(50, 50, 50, 255));
customPlot->graph(4)->setLineStyle(QCPGraph::lsNone);
customPlot->graph(4)->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, 4));
customPlot->graph(4)->setName("Some random data around\na quadratic function");
// generate data, just playing with numbers, not much to learn here:
QVector<double> x0(25), y0(25);
QVector<double> x1(15), y1(15), y1err(15);
QVector<double> x2(250), y2(250);
QVector<double> x3(250), y3(250);
QVector<double> x4(250), y4(250);
for (int i=0; i<25; ++i) // data for graph 0
{
x0[i] = 3*i/25.0;
y0[i] = qExp(-x0[i]*x0[i]*0.8)*(x0[i]*x0[i]+x0[i]);
}
for (int i=0; i<15; ++i) // data for graph 1
{
x1[i] = 3*i/15.0;;
y1[i] = qExp(-x1[i]*x1[i])*(x1[i]*x1[i])*2.6;
y1err[i] = y1[i]*0.25;
}
for (int i=0; i<250; ++i) // data for graphs 2, 3 and 4
{
x2[i] = i/250.0*3*M_PI;
x3[i] = x2[i];
x4[i] = i/250.0*100-50;
y2[i] = qSin(x2[i]*12)*qCos(x2[i])*10;
y3[i] = qCos(x3[i])*10;
y4[i] = 0.01*x4[i]*x4[i] + 1.5*(rand()/(double)RAND_MAX-0.5) + 1.5*M_PI;
}
// pass data points to graphs:
customPlot->graph(0)->setData(x0, y0);
customPlot->graph(1)->setData(x1, y1);
errorBars->setData(y1err);
customPlot->graph(2)->setData(x2, y2);
customPlot->graph(3)->setData(x3, y3);
customPlot->graph(4)->setData(x4, y4);
// activate top and right axes, which are invisible by default:
customPlot->xAxis2->setVisible(true);
customPlot->yAxis2->setVisible(true);
// set ranges appropriate to show data:
customPlot->xAxis->setRange(0, 2.7);
customPlot->yAxis->setRange(0, 2.6);
customPlot->xAxis2->setRange(0, 3.0*M_PI);
customPlot->yAxis2->setRange(-70, 35);
// set pi ticks on top axis:
customPlot->xAxis2->setTicker(QSharedPointer<QCPAxisTickerPi>(new QCPAxisTickerPi));
// add title layout element:
customPlot->plotLayout()->insertRow(0);
customPlot->plotLayout()->addElement(0, 0, new QCPTextElement(customPlot, "Way too many graphs in one plot", QFont("sans", 12, QFont::Bold)));
// set labels:
customPlot->xAxis->setLabel("Bottom axis with outward ticks");
customPlot->yAxis->setLabel("Left axis label");
customPlot->xAxis2->setLabel("Top axis label");
customPlot->yAxis2->setLabel("Right axis label");
// make ticks on bottom axis go outward:
customPlot->xAxis->setTickLength(0, 5);
customPlot->xAxis->setSubTickLength(0, 3);
// make ticks on right axis go inward and outward:
customPlot->yAxis2->setTickLength(3, 3);
customPlot->yAxis2->setSubTickLength(1, 1);
}
void MainWindow::setupLogarithmicDemo(QCustomPlot *customPlot)
{
demoName = "Logarithmic Demo";
customPlot->setNoAntialiasingOnDrag(true); // more performance/responsiveness during dragging
customPlot->addGraph();
QPen pen;
pen.setColor(QColor(255,170,100));
pen.setWidth(2);
pen.setStyle(Qt::DotLine);
customPlot->graph(0)->setPen(pen);
customPlot->graph(0)->setName("x");
customPlot->addGraph();
customPlot->graph(1)->setPen(QPen(Qt::red));
customPlot->graph(1)->setBrush(QBrush(QColor(255, 0, 0, 20)));
customPlot->graph(1)->setName("-sin(x)exp(x)");
customPlot->addGraph();
customPlot->graph(2)->setPen(QPen(Qt::blue));
customPlot->graph(2)->setBrush(QBrush(QColor(0, 0, 255, 20)));
customPlot->graph(2)->setName(" sin(x)exp(x)");
customPlot->addGraph();
pen.setColor(QColor(0,0,0));
pen.setWidth(1);
pen.setStyle(Qt::DashLine);
customPlot->graph(3)->setPen(pen);
customPlot->graph(3)->setBrush(QBrush(QColor(0,0,0,15)));
customPlot->graph(3)->setLineStyle(QCPGraph::lsStepCenter);
customPlot->graph(3)->setName("x!");
const int dataCount = 200;
const int dataFactorialCount = 21;
QVector<QCPGraphData> dataLinear(dataCount), dataMinusSinExp(dataCount), dataPlusSinExp(dataCount), dataFactorial(dataFactorialCount);
for (int i=0; i<dataCount; ++i)
{
dataLinear[i].key = i/10.0;
dataLinear[i].value = dataLinear[i].key;
dataMinusSinExp[i].key = i/10.0;
dataMinusSinExp[i].value = -qSin(dataMinusSinExp[i].key)*qExp(dataMinusSinExp[i].key);
dataPlusSinExp[i].key = i/10.0;
dataPlusSinExp[i].value = qSin(dataPlusSinExp[i].key)*qExp(dataPlusSinExp[i].key);
}
for (int i=0; i<dataFactorialCount; ++i)
{
dataFactorial[i].key = i;
dataFactorial[i].value = 1.0;
for (int k=1; k<=i; ++k) dataFactorial[i].value *= k; // factorial
}
customPlot->graph(0)->data()->set(dataLinear);
customPlot->graph(1)->data()->set(dataMinusSinExp);
customPlot->graph(2)->data()->set(dataPlusSinExp);
customPlot->graph(3)->data()->set(dataFactorial);
customPlot->yAxis->grid()->setSubGridVisible(true);
customPlot->xAxis->grid()->setSubGridVisible(true);
customPlot->yAxis->setScaleType(QCPAxis::stLogarithmic);
customPlot->yAxis2->setScaleType(QCPAxis::stLogarithmic);
QSharedPointer<QCPAxisTickerLog> logTicker(new QCPAxisTickerLog);
customPlot->yAxis->setTicker(logTicker);
customPlot->yAxis2->setTicker(logTicker);
customPlot->yAxis->setNumberFormat("eb"); // e = exponential, b = beautiful decimal powers
customPlot->yAxis->setNumberPrecision(0); // makes sure "1*10^4" is displayed only as "10^4"
customPlot->xAxis->setRange(0, 19.9);
customPlot->yAxis->setRange(1e-2, 1e10);
// make range draggable and zoomable:
customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
// make top right axes clones of bottom left axes:
customPlot->axisRect()->setupFullAxesBox();
// connect signals so top and right axes move in sync with bottom and left axes:
connect(customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->xAxis2, SLOT(setRange(QCPRange)));
connect(customPlot->yAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->yAxis2, SLOT(setRange(QCPRange)));
customPlot->legend->setVisible(true);
customPlot->legend->setBrush(QBrush(QColor(255,255,255,150)));
customPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignLeft|Qt::AlignTop); // make legend align in top left corner or axis rect
}
void MainWindow::setupRealtimeDataDemo(QCustomPlot *customPlot)
{
demoName = "Real Time Data Demo";
// include this section to fully disable antialiasing for higher performance:
/*
customPlot->setNotAntialiasedElements(QCP::aeAll);
QFont font;
font.setStyleStrategy(QFont::NoAntialias);
customPlot->xAxis->setTickLabelFont(font);
customPlot->yAxis->setTickLabelFont(font);
customPlot->legend->setFont(font);
*/
customPlot->addGraph(); // blue line
customPlot->graph(0)->setPen(QPen(QColor(40, 110, 255)));
customPlot->addGraph(); // red line
customPlot->graph(1)->setPen(QPen(QColor(255, 110, 40)));
QSharedPointer<QCPAxisTickerTime> timeTicker(new QCPAxisTickerTime);
timeTicker->setTimeFormat("%h:%m:%s");
customPlot->xAxis->setTicker(timeTicker);
customPlot->axisRect()->setupFullAxesBox();
customPlot->yAxis->setRange(-1.2, 1.2);
// make left and bottom axes transfer their ranges to right and top axes:
connect(customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->xAxis2, SLOT(setRange(QCPRange)));
connect(customPlot->yAxis, SIGNAL(rangeChanged(QCPRange)), customPlot->yAxis2, SLOT(setRange(QCPRange)));
// setup a timer that repeatedly calls MainWindow::realtimeDataSlot:
connect(&dataTimer, SIGNAL(timeout()), this, SLOT(realtimeDataSlot()));
dataTimer.start(0); // Interval 0 means to refresh as fast as possible
}
void MainWindow::setupParametricCurveDemo(QCustomPlot *customPlot)
{
demoName = "Parametric Curves Demo";
// create empty curve objects:
QCPCurve *fermatSpiral1 = new QCPCurve(customPlot->xAxis, customPlot->yAxis);
QCPCurve *fermatSpiral2 = new QCPCurve(customPlot->xAxis, customPlot->yAxis);
QCPCurve *deltoidRadial = new QCPCurve(customPlot->xAxis, customPlot->yAxis);
// generate the curve data points:
const int pointCount = 500;
QVector<QCPCurveData> dataSpiral1(pointCount), dataSpiral2(pointCount), dataDeltoid(pointCount);
for (int i=0; i<pointCount; ++i)
{
double phi = i/(double)(pointCount-1)*8*M_PI;
double theta = i/(double)(pointCount-1)*2*M_PI;
dataSpiral1[i] = QCPCurveData(i, qSqrt(phi)*qCos(phi), qSqrt(phi)*qSin(phi));
dataSpiral2[i] = QCPCurveData(i, -dataSpiral1[i].key, -dataSpiral1[i].value);
dataDeltoid[i] = QCPCurveData(i, 2*qCos(2*theta)+qCos(1*theta)+2*qSin(theta), 2*qSin(2*theta)-qSin(1*theta));
}
// pass the data to the curves; we know t (i in loop above) is ascending, so set alreadySorted=true (saves an extra internal sort):
fermatSpiral1->data()->set(dataSpiral1, true);
fermatSpiral2->data()->set(dataSpiral2, true);
deltoidRadial->data()->set(dataDeltoid, true);
// color the curves:
fermatSpiral1->setPen(QPen(Qt::blue));
fermatSpiral1->setBrush(QBrush(QColor(0, 0, 255, 20)));
fermatSpiral2->setPen(QPen(QColor(255, 120, 0)));
fermatSpiral2->setBrush(QBrush(QColor(255, 120, 0, 30)));
QRadialGradient radialGrad(QPointF(310, 180), 200);
radialGrad.setColorAt(0, QColor(170, 20, 240, 100));
radialGrad.setColorAt(0.5, QColor(20, 10, 255, 40));
radialGrad.setColorAt(1,QColor(120, 20, 240, 10));
deltoidRadial->setPen(QPen(QColor(170, 20, 240)));
deltoidRadial->setBrush(QBrush(radialGrad));
// set some basic customPlot config:
customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectPlottables);
customPlot->axisRect()->setupFullAxesBox();
customPlot->rescaleAxes();
}
void MainWindow::setupBarChartDemo(QCustomPlot *customPlot)
{
demoName = "Bar Chart Demo";
// set dark background gradient:
QLinearGradient gradient(0, 0, 0, 400);
gradient.setColorAt(0, QColor(90, 90, 90));
gradient.setColorAt(0.38, QColor(105, 105, 105));
gradient.setColorAt(1, QColor(70, 70, 70));
customPlot->setBackground(QBrush(gradient));
// create empty bar chart objects:
QCPBars *regen = new QCPBars(customPlot->xAxis, customPlot->yAxis);
QCPBars *nuclear = new QCPBars(customPlot->xAxis, customPlot->yAxis);
QCPBars *fossil = new QCPBars(customPlot->xAxis, customPlot->yAxis);
regen->setAntialiased(false); // gives more crisp, pixel aligned bar borders
nuclear->setAntialiased(false);
fossil->setAntialiased(false);
regen->setStackingGap(1);
nuclear->setStackingGap(1);
fossil->setStackingGap(1);
// set names and colors:
fossil->setName("Fossil fuels");
fossil->setPen(QPen(QColor(111, 9, 176).lighter(170)));
fossil->setBrush(QColor(111, 9, 176));
nuclear->setName("Nuclear");
nuclear->setPen(QPen(QColor(250, 170, 20).lighter(150)));
nuclear->setBrush(QColor(250, 170, 20));
regen->setName("Regenerative");
regen->setPen(QPen(QColor(0, 168, 140).lighter(130)));
regen->setBrush(QColor(0, 168, 140));
// stack bars on top of each other:
nuclear->moveAbove(fossil);
regen->moveAbove(nuclear);
// prepare x axis with country labels:
QVector<double> ticks;
QVector<QString> labels;
ticks << 1 << 2 << 3 << 4 << 5 << 6 << 7;
labels << "USA" << "Japan" << "Germany" << "France" << "UK" << "Italy" << "Canada";
QSharedPointer<QCPAxisTickerText> textTicker(new QCPAxisTickerText);
textTicker->addTicks(ticks, labels);
customPlot->xAxis->setTicker(textTicker);
customPlot->xAxis->setTickLabelRotation(60);
customPlot->xAxis->setSubTicks(false);
customPlot->xAxis->setTickLength(0, 4);
customPlot->xAxis->setRange(0, 8);
customPlot->xAxis->setBasePen(QPen(Qt::white));
customPlot->xAxis->setTickPen(QPen(Qt::white));
customPlot->xAxis->grid()->setVisible(true);
customPlot->xAxis->grid()->setPen(QPen(QColor(130, 130, 130), 0, Qt::DotLine));
customPlot->xAxis->setTickLabelColor(Qt::white);
customPlot->xAxis->setLabelColor(Qt::white);
// prepare y axis:
customPlot->yAxis->setRange(0, 12.1);
customPlot->yAxis->setPadding(5); // a bit more space to the left border
customPlot->yAxis->setLabel("Power Consumption in\nKilowatts per Capita (2007)");
customPlot->yAxis->setBasePen(QPen(Qt::white));
customPlot->yAxis->setTickPen(QPen(Qt::white));
customPlot->yAxis->setSubTickPen(QPen(Qt::white));
customPlot->yAxis->grid()->setSubGridVisible(true);
customPlot->yAxis->setTickLabelColor(Qt::white);
customPlot->yAxis->setLabelColor(Qt::white);
customPlot->yAxis->grid()->setPen(QPen(QColor(130, 130, 130), 0, Qt::SolidLine));
customPlot->yAxis->grid()->setSubGridPen(QPen(QColor(130, 130, 130), 0, Qt::DotLine));
// Add data:
QVector<double> fossilData, nuclearData, regenData;
fossilData << 0.86*10.5 << 0.83*5.5 << 0.84*5.5 << 0.52*5.8 << 0.89*5.2 << 0.90*4.2 << 0.67*11.2;
nuclearData << 0.08*10.5 << 0.12*5.5 << 0.12*5.5 << 0.40*5.8 << 0.09*5.2 << 0.00*4.2 << 0.07*11.2;
regenData << 0.06*10.5 << 0.05*5.5 << 0.04*5.5 << 0.06*5.8 << 0.02*5.2 << 0.07*4.2 << 0.25*11.2;
fossil->setData(ticks, fossilData);
nuclear->setData(ticks, nuclearData);
regen->setData(ticks, regenData);
// setup legend:
customPlot->legend->setVisible(true);
customPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignTop|Qt::AlignHCenter);
customPlot->legend->setBrush(QColor(255, 255, 255, 100));
customPlot->legend->setBorderPen(Qt::NoPen);
QFont legendFont = font();
legendFont.setPointSize(10);
customPlot->legend->setFont(legendFont);
customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
}
void MainWindow::setupStatisticalDemo(QCustomPlot *customPlot)
{
demoName = "Statistical Demo";
QCPStatisticalBox *statistical = new QCPStatisticalBox(customPlot->xAxis, customPlot->yAxis);
QBrush boxBrush(QColor(60, 60, 255, 100));
boxBrush.setStyle(Qt::Dense6Pattern); // make it look oldschool
statistical->setBrush(boxBrush);
// specify data:
statistical->addData(1, 1.1, 1.9, 2.25, 2.7, 4.2);
statistical->addData(2, 0.8, 1.6, 2.2, 3.2, 4.9, QVector<double>() << 0.7 << 0.34 << 0.45 << 6.2 << 5.84); // provide some outliers as QVector
statistical->addData(3, 0.2, 0.7, 1.1, 1.6, 2.9);
// prepare manual x axis labels:
customPlot->xAxis->setSubTicks(false);
customPlot->xAxis->setTickLength(0, 4);
customPlot->xAxis->setTickLabelRotation(20);
QSharedPointer<QCPAxisTickerText> textTicker(new QCPAxisTickerText);
textTicker->addTick(1, "Sample 1");
textTicker->addTick(2, "Sample 2");
textTicker->addTick(3, "Control Group");
customPlot->xAxis->setTicker(textTicker);
// prepare axes:
customPlot->yAxis->setLabel(QString::fromUtf8("O₂ Absorption [mg]"));
customPlot->rescaleAxes();
customPlot->xAxis->scaleRange(1.7, customPlot->xAxis->range().center());
customPlot->yAxis->setRange(0, 7);
customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
}
void MainWindow::setupSimpleItemDemo(QCustomPlot *customPlot)
{
demoName = "Simple Item Demo";
customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
// add the text label at the top:
QCPItemText *textLabel = new QCPItemText(customPlot);
textLabel->setPositionAlignment(Qt::AlignTop|Qt::AlignHCenter);
textLabel->position->setType(QCPItemPosition::ptAxisRectRatio);
textLabel->position->setCoords(0.5, 0); // place position at center/top of axis rect
textLabel->setText("Text Item Demo");
textLabel->setFont(QFont(font().family(), 16)); // make font a bit larger
textLabel->setPen(QPen(Qt::black)); // show black border around text
// add the arrow:
QCPItemLine *arrow = new QCPItemLine(customPlot);
arrow->start->setParentAnchor(textLabel->bottom);
arrow->end->setCoords(4, 1.6); // point to (4, 1.6) in x-y-plot coordinates
arrow->setHead(QCPLineEnding::esSpikeArrow);
}
void MainWindow::setupItemDemo(QCustomPlot *customPlot)
{
demoName = "Item Demo";
customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
QCPGraph *graph = customPlot->addGraph();
int n = 500;
double phase = 0;
double k = 3;
QVector<double> x(n), y(n);
for (int i=0; i<n; ++i)
{
x[i] = i/(double)(n-1)*34 - 17;
y[i] = qExp(-x[i]*x[i]/20.0)*qSin(k*x[i]+phase);
}
graph->setData(x, y);
graph->setPen(QPen(Qt::blue));
graph->rescaleKeyAxis();
customPlot->yAxis->setRange(-1.45, 1.65);
customPlot->xAxis->grid()->setZeroLinePen(Qt::NoPen);
// add the bracket at the top:
QCPItemBracket *bracket = new QCPItemBracket(customPlot);
bracket->left->setCoords(-8, 1.1);
bracket->right->setCoords(8, 1.1);
bracket->setLength(13);
// add the text label at the top:
QCPItemText *wavePacketText = new QCPItemText(customPlot);
wavePacketText->position->setParentAnchor(bracket->center);
wavePacketText->position->setCoords(0, -10); // move 10 pixels to the top from bracket center anchor
wavePacketText->setPositionAlignment(Qt::AlignBottom|Qt::AlignHCenter);
wavePacketText->setText("Wavepacket");
wavePacketText->setFont(QFont(font().family(), 10));
// add the phase tracer (red circle) which sticks to the graph data (and gets updated in bracketDataSlot by timer event):
QCPItemTracer *phaseTracer = new QCPItemTracer(customPlot);
itemDemoPhaseTracer = phaseTracer; // so we can access it later in the bracketDataSlot for animation
phaseTracer->setGraph(graph);
phaseTracer->setGraphKey((M_PI*1.5-phase)/k);
phaseTracer->setInterpolating(true);
phaseTracer->setStyle(QCPItemTracer::tsCircle);
phaseTracer->setPen(QPen(Qt::red));
phaseTracer->setBrush(Qt::red);
phaseTracer->setSize(7);
// add label for phase tracer:
QCPItemText *phaseTracerText = new QCPItemText(customPlot);
phaseTracerText->position->setType(QCPItemPosition::ptAxisRectRatio);
phaseTracerText->setPositionAlignment(Qt::AlignRight|Qt::AlignBottom);
phaseTracerText->position->setCoords(1.0, 0.95); // lower right corner of axis rect
phaseTracerText->setText("Points of fixed\nphase define\nphase velocity vp");
phaseTracerText->setTextAlignment(Qt::AlignLeft);
phaseTracerText->setFont(QFont(font().family(), 9));
phaseTracerText->setPadding(QMargins(8, 0, 0, 0));
// add arrow pointing at phase tracer, coming from label:
QCPItemCurve *phaseTracerArrow = new QCPItemCurve(customPlot);
phaseTracerArrow->start->setParentAnchor(phaseTracerText->left);
phaseTracerArrow->startDir->setParentAnchor(phaseTracerArrow->start);
phaseTracerArrow->startDir->setCoords(-40, 0); // direction 30 pixels to the left of parent anchor (tracerArrow->start)
phaseTracerArrow->end->setParentAnchor(phaseTracer->position);
phaseTracerArrow->end->setCoords(10, 10);
phaseTracerArrow->endDir->setParentAnchor(phaseTracerArrow->end);
phaseTracerArrow->endDir->setCoords(30, 30);
phaseTracerArrow->setHead(QCPLineEnding::esSpikeArrow);
phaseTracerArrow->setTail(QCPLineEnding(QCPLineEnding::esBar, (phaseTracerText->bottom->pixelPosition().y()-phaseTracerText->top->pixelPosition().y())*0.85));
// add the group velocity tracer (green circle):
QCPItemTracer *groupTracer = new QCPItemTracer(customPlot);
groupTracer->setGraph(graph);
groupTracer->setGraphKey(5.5);
groupTracer->setInterpolating(true);
groupTracer->setStyle(QCPItemTracer::tsCircle);
groupTracer->setPen(QPen(Qt::green));
groupTracer->setBrush(Qt::green);
groupTracer->setSize(7);
// add label for group tracer:
QCPItemText *groupTracerText = new QCPItemText(customPlot);
groupTracerText->position->setType(QCPItemPosition::ptAxisRectRatio);
groupTracerText->setPositionAlignment(Qt::AlignRight|Qt::AlignTop);
groupTracerText->position->setCoords(1.0, 0.20); // lower right corner of axis rect
groupTracerText->setText("Fixed positions in\nwave packet define\ngroup velocity vg");
groupTracerText->setTextAlignment(Qt::AlignLeft);
groupTracerText->setFont(QFont(font().family(), 9));
groupTracerText->setPadding(QMargins(8, 0, 0, 0));
// add arrow pointing at group tracer, coming from label:
QCPItemCurve *groupTracerArrow = new QCPItemCurve(customPlot);
groupTracerArrow->start->setParentAnchor(groupTracerText->left);
groupTracerArrow->startDir->setParentAnchor(groupTracerArrow->start);
groupTracerArrow->startDir->setCoords(-40, 0); // direction 30 pixels to the left of parent anchor (tracerArrow->start)
groupTracerArrow->end->setCoords(5.5, 0.4);
groupTracerArrow->endDir->setParentAnchor(groupTracerArrow->end);
groupTracerArrow->endDir->setCoords(0, -40);
groupTracerArrow->setHead(QCPLineEnding::esSpikeArrow);
groupTracerArrow->setTail(QCPLineEnding(QCPLineEnding::esBar, (groupTracerText->bottom->pixelPosition().y()-groupTracerText->top->pixelPosition().y())*0.85));
// add dispersion arrow:
QCPItemCurve *arrow = new QCPItemCurve(customPlot);
arrow->start->setCoords(1, -1.1);
arrow->startDir->setCoords(-1, -1.3);
arrow->endDir->setCoords(-5, -0.3);
arrow->end->setCoords(-10, -0.2);
arrow->setHead(QCPLineEnding::esSpikeArrow);
// add the dispersion arrow label:
QCPItemText *dispersionText = new QCPItemText(customPlot);
dispersionText->position->setCoords(-6, -0.9);
dispersionText->setRotation(40);
dispersionText->setText("Dispersion with\nvp < vg");
dispersionText->setFont(QFont(font().family(), 10));
// setup a timer that repeatedly calls MainWindow::bracketDataSlot:
connect(&dataTimer, SIGNAL(timeout()), this, SLOT(bracketDataSlot()));
dataTimer.start(0); // Interval 0 means to refresh as fast as possible
}
void MainWindow::setupStyledDemo(QCustomPlot *customPlot)
{
demoName = "Styled Demo";
// prepare data:
QVector<double> x1(20), y1(20);
QVector<double> x2(100), y2(100);
QVector<double> x3(20), y3(20);
QVector<double> x4(20), y4(20);
for (int i=0; i<x1.size(); ++i)
{
x1[i] = i/(double)(x1.size()-1)*10;
y1[i] = qCos(x1[i]*0.8+qSin(x1[i]*0.16+1.0))*qSin(x1[i]*0.54)+1.4;
}
for (int i=0; i<x2.size(); ++i)
{
x2[i] = i/(double)(x2.size()-1)*10;
y2[i] = qCos(x2[i]*0.85+qSin(x2[i]*0.165+1.1))*qSin(x2[i]*0.50)+1.7;
}
for (int i=0; i<x3.size(); ++i)
{
x3[i] = i/(double)(x3.size()-1)*10;
y3[i] = 0.05+3*(0.5+qCos(x3[i]*x3[i]*0.2+2)*0.5)/(double)(x3[i]+0.7)+qrand()/(double)RAND_MAX*0.01;
}
for (int i=0; i<x4.size(); ++i)
{
x4[i] = x3[i];
y4[i] = (0.5-y3[i])+((x4[i]-2)*(x4[i]-2)*0.02);
}
// create and configure plottables:
QCPGraph *graph1 = customPlot->addGraph();
graph1->setData(x1, y1);
graph1->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(Qt::black, 1.5), QBrush(Qt::white), 9));
graph1->setPen(QPen(QColor(120, 120, 120), 2));
QCPGraph *graph2 = customPlot->addGraph();
graph2->setData(x2, y2);
graph2->setPen(Qt::NoPen);
graph2->setBrush(QColor(200, 200, 200, 20));
graph2->setChannelFillGraph(graph1);
QCPBars *bars1 = new QCPBars(customPlot->xAxis, customPlot->yAxis);
bars1->setWidth(9/(double)x3.size());
bars1->setData(x3, y3);
bars1->setPen(Qt::NoPen);
bars1->setBrush(QColor(10, 140, 70, 160));
QCPBars *bars2 = new QCPBars(customPlot->xAxis, customPlot->yAxis);
bars2->setWidth(9/(double)x4.size());
bars2->setData(x4, y4);
bars2->setPen(Qt::NoPen);
bars2->setBrush(QColor(10, 100, 50, 70));
bars2->moveAbove(bars1);
// move bars above graphs and grid below bars:
customPlot->addLayer("abovemain", customPlot->layer("main"), QCustomPlot::limAbove);
customPlot->addLayer("belowmain", customPlot->layer("main"), QCustomPlot::limBelow);
graph1->setLayer("abovemain");
customPlot->xAxis->grid()->setLayer("belowmain");
customPlot->yAxis->grid()->setLayer("belowmain");
// set some pens, brushes and backgrounds:
customPlot->xAxis->setBasePen(QPen(Qt::white, 1));
customPlot->yAxis->setBasePen(QPen(Qt::white, 1));
customPlot->xAxis->setTickPen(QPen(Qt::white, 1));
customPlot->yAxis->setTickPen(QPen(Qt::white, 1));
customPlot->xAxis->setSubTickPen(QPen(Qt::white, 1));
customPlot->yAxis->setSubTickPen(QPen(Qt::white, 1));
customPlot->xAxis->setTickLabelColor(Qt::white);
customPlot->yAxis->setTickLabelColor(Qt::white);
customPlot->xAxis->grid()->setPen(QPen(QColor(140, 140, 140), 1, Qt::DotLine));
customPlot->yAxis->grid()->setPen(QPen(QColor(140, 140, 140), 1, Qt::DotLine));
customPlot->xAxis->grid()->setSubGridPen(QPen(QColor(80, 80, 80), 1, Qt::DotLine));
customPlot->yAxis->grid()->setSubGridPen(QPen(QColor(80, 80, 80), 1, Qt::DotLine));
customPlot->xAxis->grid()->setSubGridVisible(true);
customPlot->yAxis->grid()->setSubGridVisible(true);
customPlot->xAxis->grid()->setZeroLinePen(Qt::NoPen);
customPlot->yAxis->grid()->setZeroLinePen(Qt::NoPen);
customPlot->xAxis->setUpperEnding(QCPLineEnding::esSpikeArrow);
customPlot->yAxis->setUpperEnding(QCPLineEnding::esSpikeArrow);
QLinearGradient plotGradient;
plotGradient.setStart(0, 0);
plotGradient.setFinalStop(0, 350);
plotGradient.setColorAt(0, QColor(80, 80, 80));
plotGradient.setColorAt(1, QColor(50, 50, 50));
customPlot->setBackground(plotGradient);
QLinearGradient axisRectGradient;
axisRectGradient.setStart(0, 0);
axisRectGradient.setFinalStop(0, 350);
axisRectGradient.setColorAt(0, QColor(80, 80, 80));
axisRectGradient.setColorAt(1, QColor(30, 30, 30));
customPlot->axisRect()->setBackground(axisRectGradient);
customPlot->rescaleAxes();
customPlot->yAxis->setRange(0, 2);
}
void MainWindow::setupAdvancedAxesDemo(QCustomPlot *customPlot)
{
demoName = "Advanced Axes Demo";
// configure axis rect:
customPlot->plotLayout()->clear(); // clear default axis rect so we can start from scratch
QCPAxisRect *wideAxisRect = new QCPAxisRect(customPlot);
wideAxisRect->setupFullAxesBox(true);
wideAxisRect->axis(QCPAxis::atRight, 0)->setTickLabels(true);
wideAxisRect->addAxis(QCPAxis::atLeft)->setTickLabelColor(QColor("#6050F8")); // add an extra axis on the left and color its numbers
QCPLayoutGrid *subLayout = new QCPLayoutGrid;
customPlot->plotLayout()->addElement(0, 0, wideAxisRect); // insert axis rect in first row
customPlot->plotLayout()->addElement(1, 0, subLayout); // sub layout in second row (grid layout will grow accordingly)
//customPlot->plotLayout()->setRowStretchFactor(1, 2);
// prepare axis rects that will be placed in the sublayout:
QCPAxisRect *subRectLeft = new QCPAxisRect(customPlot, false); // false means to not setup default axes
QCPAxisRect *subRectRight = new QCPAxisRect(customPlot, false);
subLayout->addElement(0, 0, subRectLeft);
subLayout->addElement(0, 1, subRectRight);
subRectRight->setMaximumSize(100, 100); // make bottom right axis rect size fixed 100x100
subRectRight->setMinimumSize(100, 100); // make bottom right axis rect size fixed 100x100
// setup axes in sub layout axis rects:
subRectLeft->addAxes(QCPAxis::atBottom | QCPAxis::atLeft);
subRectRight->addAxes(QCPAxis::atBottom | QCPAxis::atRight);
subRectLeft->axis(QCPAxis::atLeft)->ticker()->setTickCount(2);
subRectRight->axis(QCPAxis::atRight)->ticker()->setTickCount(2);
subRectRight->axis(QCPAxis::atBottom)->ticker()->setTickCount(2);
subRectLeft->axis(QCPAxis::atBottom)->grid()->setVisible(true);
// synchronize the left and right margins of the top and bottom axis rects:
QCPMarginGroup *marginGroup = new QCPMarginGroup(customPlot);
subRectLeft->setMarginGroup(QCP::msLeft, marginGroup);
subRectRight->setMarginGroup(QCP::msRight, marginGroup);
wideAxisRect->setMarginGroup(QCP::msLeft | QCP::msRight, marginGroup);
// move newly created axes on "axes" layer and grids on "grid" layer:
foreach (QCPAxisRect *rect, customPlot->axisRects())
{
foreach (QCPAxis *axis, rect->axes())
{
axis->setLayer("axes");
axis->grid()->setLayer("grid");
}
}
// prepare data:
QVector<QCPGraphData> dataCos(21), dataGauss(50), dataRandom(100);
QVector<double> x3, y3;
qsrand(3);
for (int i=0; i<dataCos.size(); ++i)
{
dataCos[i].key = i/(double)(dataCos.size()-1)*10-5.0;
dataCos[i].value = qCos(dataCos[i].key);
}
for (int i=0; i<dataGauss.size(); ++i)
{
dataGauss[i].key = i/(double)dataGauss.size()*10-5.0;
dataGauss[i].value = qExp(-dataGauss[i].key*dataGauss[i].key*0.2)*1000;
}
for (int i=0; i<dataRandom.size(); ++i)
{
dataRandom[i].key = i/(double)dataRandom.size()*10;
dataRandom[i].value = qrand()/(double)RAND_MAX-0.5+dataRandom[qMax(0, i-1)].value;
}
x3 << 1 << 2 << 3 << 4;
y3 << 2 << 2.5 << 4 << 1.5;
// create and configure plottables:
QCPGraph *mainGraphCos = customPlot->addGraph(wideAxisRect->axis(QCPAxis::atBottom), wideAxisRect->axis(QCPAxis::atLeft));
mainGraphCos->data()->set(dataCos);
mainGraphCos->valueAxis()->setRange(-1, 1);
mainGraphCos->rescaleKeyAxis();
mainGraphCos->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(Qt::black), QBrush(Qt::white), 6));
mainGraphCos->setPen(QPen(QColor(120, 120, 120), 2));
QCPGraph *mainGraphGauss = customPlot->addGraph(wideAxisRect->axis(QCPAxis::atBottom), wideAxisRect->axis(QCPAxis::atLeft, 1));
mainGraphGauss->data()->set(dataGauss);
mainGraphGauss->setPen(QPen(QColor("#8070B8"), 2));
mainGraphGauss->setBrush(QColor(110, 170, 110, 30));
mainGraphCos->setChannelFillGraph(mainGraphGauss);
mainGraphCos->setBrush(QColor(255, 161, 0, 50));
mainGraphGauss->valueAxis()->setRange(0, 1000);
mainGraphGauss->rescaleKeyAxis();
QCPGraph *subGraphRandom = customPlot->addGraph(subRectLeft->axis(QCPAxis::atBottom), subRectLeft->axis(QCPAxis::atLeft));
subGraphRandom->data()->set(dataRandom);
subGraphRandom->setLineStyle(QCPGraph::lsImpulse);
subGraphRandom->setPen(QPen(QColor("#FFA100"), 1.5));
subGraphRandom->rescaleAxes();
QCPBars *subBars = new QCPBars(subRectRight->axis(QCPAxis::atBottom), subRectRight->axis(QCPAxis::atRight));
subBars->setWidth(3/(double)x3.size());
subBars->setData(x3, y3);
subBars->setPen(QPen(Qt::black));
subBars->setAntialiased(false);
subBars->setAntialiasedFill(false);
subBars->setBrush(QColor("#705BE8"));
subBars->keyAxis()->setSubTicks(false);
subBars->rescaleAxes();
// setup a ticker for subBars key axis that only gives integer ticks:
QSharedPointer<QCPAxisTickerFixed> intTicker(new QCPAxisTickerFixed);
intTicker->setTickStep(1.0);
intTicker->setScaleStrategy(QCPAxisTickerFixed::ssMultiples);
subBars->keyAxis()->setTicker(intTicker);
}
void MainWindow::setupColorMapDemo(QCustomPlot *customPlot)
{
demoName = "Color Map Demo";
// configure axis rect:
customPlot->setInteractions(QCP::iRangeDrag|QCP::iRangeZoom); // this will also allow rescaling the color scale by dragging/zooming
customPlot->axisRect()->setupFullAxesBox(true);
customPlot->xAxis->setLabel("x");
customPlot->yAxis->setLabel("y");
// set up the QCPColorMap:
QCPColorMap *colorMap = new QCPColorMap(customPlot->xAxis, customPlot->yAxis);
int nx = 200;
int ny = 200;
colorMap->data()->setSize(nx, ny); // we want the color map to have nx * ny data points
colorMap->data()->setRange(QCPRange(-4, 4), QCPRange(-4, 4)); // and span the coordinate range -4..4 in both key (x) and value (y) dimensions
// now we assign some data, by accessing the QCPColorMapData instance of the color map:
double x, y, z;
for (int xIndex=0; xIndex<nx; ++xIndex)
{
for (int yIndex=0; yIndex<ny; ++yIndex)
{
colorMap->data()->cellToCoord(xIndex, yIndex, &x, &y);
double r = 3*qSqrt(x*x+y*y)+1e-2;
z = 2*x*(qCos(r+2)/r-qSin(r+2)/r); // the B field strength of dipole radiation (modulo physical constants)
colorMap->data()->setCell(xIndex, yIndex, z);
}
}
// add a color scale:
QCPColorScale *colorScale = new QCPColorScale(customPlot);
customPlot->plotLayout()->addElement(0, 1, colorScale); // add it to the right of the main axis rect
colorScale->setType(QCPAxis::atRight); // scale shall be vertical bar with tick/axis labels right (actually atRight is already the default)
colorMap->setColorScale(colorScale); // associate the color map with the color scale
colorScale->axis()->setLabel("Magnetic Field Strength");
// set the color gradient of the color map to one of the presets:
colorMap->setGradient(QCPColorGradient::gpPolar);
// we could have also created a QCPColorGradient instance and added own colors to
// the gradient, see the documentation of QCPColorGradient for what's possible.
// rescale the data dimension (color) such that all data points lie in the span visualized by the color gradient:
colorMap->rescaleDataRange();
// make sure the axis rect and color scale synchronize their bottom and top margins (so they line up):
QCPMarginGroup *marginGroup = new QCPMarginGroup(customPlot);
customPlot->axisRect()->setMarginGroup(QCP::msBottom|QCP::msTop, marginGroup);
colorScale->setMarginGroup(QCP::msBottom|QCP::msTop, marginGroup);
// rescale the key (x) and value (y) axes so the whole color map is visible:
customPlot->rescaleAxes();
}
void MainWindow::setupFinancialDemo(QCustomPlot *customPlot)
{
demoName = "Financial Charts Demo";
customPlot->legend->setVisible(true);
// generate two sets of random walk data (one for candlestick and one for ohlc chart):
int n = 500;
QVector<double> time(n), value1(n), value2(n);
QDateTime start = QDateTime(QDate(2014, 6, 11));
start.setTimeSpec(Qt::UTC);
double startTime = start.toTime_t();
double binSize = 3600*24; // bin data in 1 day intervals
time[0] = startTime;
value1[0] = 60;
value2[0] = 20;
qsrand(9);
for (int i=1; i<n; ++i)
{
time[i] = startTime + 3600*i;
value1[i] = value1[i-1] + (qrand()/(double)RAND_MAX-0.5)*10;
value2[i] = value2[i-1] + (qrand()/(double)RAND_MAX-0.5)*3;
}
// create candlestick chart:
QCPFinancial *candlesticks = new QCPFinancial(customPlot->xAxis, customPlot->yAxis);
candlesticks->setName("Candlestick");
candlesticks->setChartStyle(QCPFinancial::csCandlestick);
candlesticks->data()->set(QCPFinancial::timeSeriesToOhlc(time, value1, binSize, startTime));
candlesticks->setWidth(binSize*0.9);
candlesticks->setTwoColored(true);
candlesticks->setBrushPositive(QColor(245, 245, 245));
candlesticks->setBrushNegative(QColor(40, 40, 40));
candlesticks->setPenPositive(QPen(QColor(0, 0, 0)));
candlesticks->setPenNegative(QPen(QColor(0, 0, 0)));
// create ohlc chart:
QCPFinancial *ohlc = new QCPFinancial(customPlot->xAxis, customPlot->yAxis);
ohlc->setName("OHLC");
ohlc->setChartStyle(QCPFinancial::csOhlc);
ohlc->data()->set(QCPFinancial::timeSeriesToOhlc(time, value2, binSize/3.0, startTime)); // divide binSize by 3 just to make the ohlc bars a bit denser
ohlc->setWidth(binSize*0.2);
ohlc->setTwoColored(true);
// create bottom axis rect for volume bar chart:
QCPAxisRect *volumeAxisRect = new QCPAxisRect(customPlot);
customPlot->plotLayout()->addElement(1, 0, volumeAxisRect);
volumeAxisRect->setMaximumSize(QSize(QWIDGETSIZE_MAX, 100));
volumeAxisRect->axis(QCPAxis::atBottom)->setLayer("axes");
volumeAxisRect->axis(QCPAxis::atBottom)->grid()->setLayer("grid");
// bring bottom and main axis rect closer together:
customPlot->plotLayout()->setRowSpacing(0);
volumeAxisRect->setAutoMargins(QCP::msLeft|QCP::msRight|QCP::msBottom);
volumeAxisRect->setMargins(QMargins(0, 0, 0, 0));
// create two bar plottables, for positive (green) and negative (red) volume bars:
customPlot->setAutoAddPlottableToLegend(false);
QCPBars *volumePos = new QCPBars(volumeAxisRect->axis(QCPAxis::atBottom), volumeAxisRect->axis(QCPAxis::atLeft));
QCPBars *volumeNeg = new QCPBars(volumeAxisRect->axis(QCPAxis::atBottom), volumeAxisRect->axis(QCPAxis::atLeft));
for (int i=0; i<n/5; ++i)
{
int v = qrand()%20000+qrand()%20000+qrand()%20000-10000*3;
(v < 0 ? volumeNeg : volumePos)->addData(startTime+3600*5.0*i, qAbs(v)); // add data to either volumeNeg or volumePos, depending on sign of v
}
volumePos->setWidth(3600*4);
volumePos->setPen(Qt::NoPen);
volumePos->setBrush(QColor(100, 180, 110));
volumeNeg->setWidth(3600*4);
volumeNeg->setPen(Qt::NoPen);
volumeNeg->setBrush(QColor(180, 90, 90));
// interconnect x axis ranges of main and bottom axis rects:
connect(customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), volumeAxisRect->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange)));
connect(volumeAxisRect->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), customPlot->xAxis, SLOT(setRange(QCPRange)));
// configure axes of both main and bottom axis rect:
QSharedPointer<QCPAxisTickerDateTime> dateTimeTicker(new QCPAxisTickerDateTime);
dateTimeTicker->setDateTimeSpec(Qt::UTC);
dateTimeTicker->setDateTimeFormat("dd. MMMM");
volumeAxisRect->axis(QCPAxis::atBottom)->setTicker(dateTimeTicker);
volumeAxisRect->axis(QCPAxis::atBottom)->setTickLabelRotation(15);
customPlot->xAxis->setBasePen(Qt::NoPen);
customPlot->xAxis->setTickLabels(false);
customPlot->xAxis->setTicks(false); // only want vertical grid in main axis rect, so hide xAxis backbone, ticks, and labels
customPlot->xAxis->setTicker(dateTimeTicker);
customPlot->rescaleAxes();
customPlot->xAxis->scaleRange(1.025, customPlot->xAxis->range().center());
customPlot->yAxis->scaleRange(1.1, customPlot->yAxis->range().center());
// make axis rects' left side line up:
QCPMarginGroup *group = new QCPMarginGroup(customPlot);
customPlot->axisRect()->setMarginGroup(QCP::msLeft|QCP::msRight, group);
volumeAxisRect->setMarginGroup(QCP::msLeft|QCP::msRight, group);
}
void MainWindow::realtimeDataSlot()
{
static QTime time(QTime::currentTime());
// calculate two new data points:
double key = time.elapsed()/1000.0; // time elapsed since start of demo, in seconds
static double lastPointKey = 0;
if (key-lastPointKey > 0.002) // at most add point every 2 ms
{
// add data to lines:
ui->customPlot->graph(0)->addData(key, qSin(key)+qrand()/(double)RAND_MAX*1*qSin(key/0.3843));
ui->customPlot->graph(1)->addData(key, qCos(key)+qrand()/(double)RAND_MAX*0.5*qSin(key/0.4364));
// rescale value (vertical) axis to fit the current data:
//ui->customPlot->graph(0)->rescaleValueAxis();
//ui->customPlot->graph(1)->rescaleValueAxis(true);
lastPointKey = key;
}
// make key axis range scroll with the data (at a constant range size of 8):
ui->customPlot->xAxis->setRange(key, 8, Qt::AlignRight);
ui->customPlot->replot();
// calculate frames per second:
static double lastFpsKey;
static int frameCount;
++frameCount;
if (key-lastFpsKey > 2) // average fps over 2 seconds
{
ui->statusBar->showMessage(
QString("%1 FPS, Total Data points: %2")
.arg(frameCount/(key-lastFpsKey), 0, 'f', 0)
.arg(ui->customPlot->graph(0)->data()->size()+ui->customPlot->graph(1)->data()->size())
, 0);
lastFpsKey = key;
frameCount = 0;
}
}
void MainWindow::bracketDataSlot()
{
double secs = QCPAxisTickerDateTime::dateTimeToKey(QDateTime::currentDateTime());
// update data to make phase move:
int n = 500;
double phase = secs*5;
double k = 3;
QVector<double> x(n), y(n);
for (int i=0; i<n; ++i)
{
x[i] = i/(double)(n-1)*34 - 17;
y[i] = qExp(-x[i]*x[i]/20.0)*qSin(k*x[i]+phase);
}
ui->customPlot->graph()->setData(x, y);
itemDemoPhaseTracer->setGraphKey((8*M_PI+fmod(M_PI*1.5-phase, 6*M_PI))/k);
ui->customPlot->replot();
// calculate frames per second:
double key = secs;
static double lastFpsKey;
static int frameCount;
++frameCount;
if (key-lastFpsKey > 2) // average fps over 2 seconds
{
ui->statusBar->showMessage(
QString("%1 FPS, Total Data points: %2")
.arg(frameCount/(key-lastFpsKey), 0, 'f', 0)
.arg(ui->customPlot->graph(0)->data()->size())
, 0);
lastFpsKey = key;
frameCount = 0;
}
}
void MainWindow::setupPlayground(QCustomPlot *customPlot)
{
Q_UNUSED(customPlot)
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::screenShot()
{
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
QPixmap pm = QPixmap::grabWindow(qApp->desktop()->winId(), this->x()+2, this->y()+2, this->frameGeometry().width()-4, this->frameGeometry().height()-4);
#elif QT_VERSION < QT_VERSION_CHECK(5, 5, 0)
QPixmap pm = qApp->primaryScreen()->grabWindow(qApp->desktop()->winId(), this->x()+2, this->y()+2, this->frameGeometry().width()-4, this->frameGeometry().height()-4);
#else
QPixmap pm = qApp->primaryScreen()->grabWindow(qApp->desktop()->winId(), this->x()-7, this->y()-7, this->frameGeometry().width()+14, this->frameGeometry().height()+14);
#endif
QString fileName = demoName.toLower()+".png";
fileName.replace(" ", "");
pm.save("./screenshots/"+fileName);
qApp->quit();
}
void MainWindow::allScreenShots()
{
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
QPixmap pm = QPixmap::grabWindow(qApp->desktop()->winId(), this->x()+2, this->y()+2, this->frameGeometry().width()-4, this->frameGeometry().height()-4);
#elif QT_VERSION < QT_VERSION_CHECK(5, 5, 0)
QPixmap pm = qApp->primaryScreen()->grabWindow(qApp->desktop()->winId(), this->x()+2, this->y()+2, this->frameGeometry().width()-4, this->frameGeometry().height()-4);
#else
QPixmap pm = qApp->primaryScreen()->grabWindow(qApp->desktop()->winId(), this->x()-7, this->y()-7, this->frameGeometry().width()+14, this->frameGeometry().height()+14);
#endif
QString fileName = demoName.toLower()+".png";
fileName.replace(" ", "");
pm.save("./screenshots/"+fileName);
if (currentDemoIndex < 19)
{
if (dataTimer.isActive())
dataTimer.stop();
dataTimer.disconnect();
delete ui->customPlot;
ui->customPlot = new QCustomPlot(ui->centralWidget);
ui->verticalLayout->addWidget(ui->customPlot);
setupDemo(currentDemoIndex+1);
// setup delay for demos that need time to develop proper look:
int delay = 250;
if (currentDemoIndex == 10) // Next is Realtime data demo
delay = 12000;
else if (currentDemoIndex == 15) // Next is Item demo
delay = 5000;
QTimer::singleShot(delay, this, SLOT(allScreenShots()));
} else
{
qApp->quit();
}
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