// RealTimeDemoDlg.cpp : implementation file
//
#include "stdafx.h"
#include "resource.h"
#include "RealTimeDemoDlg.h"
#include <math.h>
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
/////////////////////////////////////////////////////////////////////////////
// CRealTimeDemoDlg dialog
static const int DataRateTimer = 1;
static const int ChartUpdateTimer = 2;
// 250ms per data point, chart contains 1 min of data = 240 data points.
static const int DataInterval = 250;
static const int sampleSize = 240;
//
// Constructor
//
CRealTimeDemoDlg::CRealTimeDemoDlg(CWnd* pParent /*=NULL*/)
: CDialog(IDD_REALTIMEDEMO, pParent)
{
}
void CRealTimeDemoDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
DDX_Control(pDX, IDC_GammaValue, m_ValueC);
DDX_Control(pDX, IDC_BetaValue, m_ValueB);
DDX_Control(pDX, IDC_AlphaValue, m_ValueA);
DDX_Control(pDX, IDC_ChartViewer, m_ChartViewer);
DDX_Control(pDX, IDC_RunPB, m_RunPB);
DDX_Control(pDX, IDC_UpdatePeriod, m_UpdatePeriod);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CRealTimeDemoDlg, CDialog)
ON_WM_TIMER()
ON_BN_CLICKED(IDC_RunPB, OnRunPB)
ON_BN_CLICKED(IDC_FreezePB, OnFreezePB)
ON_CBN_SELCHANGE(IDC_UpdatePeriod, OnSelchangeUpdatePeriod)
ON_CONTROL(CVN_ViewPortChanged, IDC_ChartViewer, OnViewPortChanged)
END_MESSAGE_MAP()
//
// Initialization
//
BOOL CRealTimeDemoDlg::OnInitDialog()
{
CDialog::OnInitDialog();
//
// Initialize member variables
//
// Allocate memory for the data series and initialize to Chart::NoValue
m_timeStamps.resize(sampleSize, Chart::NoValue);
m_dataSeriesA.resize(sampleSize, Chart::NoValue);
m_dataSeriesB.resize(sampleSize, Chart::NoValue);
m_dataSeriesC.resize(sampleSize, Chart::NoValue);
m_extBgColor = getDefaultBgColor(); // Default background color
// Set m_nextDataTime to the current time. It is used by the real time random number
// generator so it knows what timestamp should be used for the next data point.
SYSTEMTIME st;
GetLocalTime(&st);
m_nextDataTime = Chart::chartTime(st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute,
st.wSecond) + st.wMilliseconds / 1000.0;
//
// Initialize controls
//
// Set up the data acquisition mechanism. In this demo, we just use a timer to get a
// sample every 250ms.
SetTimer(DataRateTimer, DataInterval, 0);
// The chart update rate (in ms)
m_UpdatePeriod.SelectString(0, _T("250"));
// Load icons for the Run/Freeze buttons
loadButtonIcon(IDC_RunPB, IDI_RunPB, 100, 20);
loadButtonIcon(IDC_FreezePB, IDI_FreezePB, 100, 20);
// Initially set the Run mode
m_RunPB.SetCheck(1);
OnRunPB();
return TRUE;
}
//
// User clicks on the Run pushbutton
//
void CRealTimeDemoDlg::OnRunPB()
{
// Enable chart update timer
CString s;
m_UpdatePeriod.GetLBText(m_UpdatePeriod.GetCurSel(), s);
SetTimer(ChartUpdateTimer, _tcstol(s, 0, 0), 0);
}
//
// User clicks on the Freeze pushbutton
//
void CRealTimeDemoDlg::OnFreezePB()
{
// Disable chart update timer
KillTimer(ChartUpdateTimer);
}
//
// Handles timer events
//
void CRealTimeDemoDlg::OnTimer(UINT_PTR nIDEvent)
{
switch (nIDEvent)
{
case DataRateTimer:
// Is data acquisition timer - get a new data sample
getData();
break;
case ChartUpdateTimer:
// Is chart update timer - request chart update
m_ChartViewer.updateViewPort(true, false);
break;
}
CDialog::OnTimer(nIDEvent);
}
//
// View port changed event
//
void CRealTimeDemoDlg::OnViewPortChanged()
{
drawChart(&m_ChartViewer);
}
//
// User changes the chart update period
//
void CRealTimeDemoDlg::OnSelchangeUpdatePeriod()
{
if (m_RunPB.GetCheck())
{
// Call freeze then run to use the new chart update period
OnFreezePB();
OnRunPB();
}
}
//
// A utility to shift a new data value into a data array
//
static void shiftData(double *data, int len, double newValue)
{
memmove(data, data + 1, sizeof(*data) * (len - 1));
data[len - 1] = newValue;
}
//
// The data acquisition routine. In this demo, this is invoked every 250ms.
//
void CRealTimeDemoDlg::getData()
{
// The current time in millisecond resolution
SYSTEMTIME st;
GetLocalTime(&st);
double now = Chart::chartTime(st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute,
st.wSecond) + st.wMilliseconds / 1000.0;
// This is our formula for the random number generator
do
{
// Get a data sample
double p = m_nextDataTime * 4;
double dataA = 20 + cos(p * 129241) * 10 + 1 / (cos(p) * cos(p) + 0.01);
double dataB = 150 + 100 * sin(p / 27.7) * sin(p / 10.1);
double dataC = 150 + 100 * cos(p / 6.7) * cos(p / 11.9);
// Shift the values into the arrays
shiftData(&m_dataSeriesA[0], (int)m_dataSeriesA.size(), dataA);
shiftData(&m_dataSeriesB[0], (int)m_dataSeriesB.size(), dataB);
shiftData(&m_dataSeriesC[0], (int)m_dataSeriesC.size(), dataC);
shiftData(&m_timeStamps[0], (int)m_timeStamps.size(), m_nextDataTime);
m_nextDataTime += DataInterval / 1000.0;
}
while (m_nextDataTime < now);
//
// We provide some visual feedback to the latest numbers generated, so you can see the
// data being generated.
//
char buffer[1024];
sprintf(buffer, "%.2f", m_dataSeriesA[sampleSize - 1]);
m_ValueA.SetWindowText(CString(buffer));
sprintf(buffer, "%.2f", m_dataSeriesB[sampleSize - 1]);
m_ValueB.SetWindowText(CString(buffer));
sprintf(buffer, "%.2f", m_dataSeriesC[sampleSize - 1]);
m_ValueC.SetWindowText(CString(buffer));
}
//
// Draw the chart and display it in the given viewer
//
void CRealTimeDemoDlg::drawChart(CChartViewer *viewer)
{
// Create an XYChart object 600 x 270 pixels in size, with light grey (f4f4f4)
// background, black (000000) border, 1 pixel raised effect, and with a rounded frame.
XYChart *c = new XYChart(600, 270, 0xf4f4f4, 0x000000, 1);
c->setRoundedFrame(m_extBgColor);
// Set the plotarea at (55, 62) and of size 520 x 175 pixels. Use white (ffffff)
// background. Enable both horizontal and vertical grids by setting their colors to
// grey (cccccc). Set clipping mode to clip the data lines to the plot area.
c->setPlotArea(55, 62, 520, 175, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);
c->setClipping();
// Add a title to the chart using 15 pts Times New Roman Bold Italic font, with a light
// grey (dddddd) background, black (000000) border, and a glass like raised effect.
c->addTitle("Field Intensity at Observation Satellite", "Times New Roman Bold Italic",
15)->setBackground(0xdddddd, 0x000000, Chart::glassEffect());
// Add a legend box at the top of the plot area with 9pts Arial Bold font. We set the
// legend box to the same width as the plot area and use grid layout (as opposed to
// flow or top/down layout). This distributes the 3 legend icons evenly on top of the
// plot area.
LegendBox *b = c->addLegend2(55, 33, 3, "Arial Bold", 9);
b->setBackground(Chart::Transparent, Chart::Transparent);
b->setWidth(520);
// Configure the y-axis with a 10pts Arial Bold axis title
c->yAxis()->setTitle("Intensity (V/m)", "Arial Bold", 10);
// Configure the x-axis to auto-scale with at least 75 pixels between major tick and
// 15 pixels between minor ticks. This shows more minor grid lines on the chart.
c->xAxis()->setTickDensity(75, 15);
// Set the axes width to 2 pixels
c->xAxis()->setWidth(2);
c->yAxis()->setWidth(2);
// Now we add the data to the chart.
double lastTime = m_timeStamps[sampleSize - 1];
if (lastTime != Chart::NoValue)
{
// Set up the x-axis to show the time range in the data buffer
c->xAxis()->setDateScale(lastTime - DataInterval * sampleSize / 1000, lastTime);
// Set the x-axis label format
c->xAxis()->setLabelFormat("{value|hh:nn:ss}");
// Create a line layer to plot the lines
LineLayer *layer = c->addLineLayer();
// The x-coordinates are the timeStamps.
layer->setXData(vectorToArray(m_timeStamps));
// The 3 data series are used to draw 3 lines. Here we put the latest data values
// as part of the data set name, so you can see them updated in the legend box.
char buffer[1024];
sprintf(buffer, "Alpha: <*bgColor=FFCCCC*> %.2f ", m_dataSeriesA.back());
layer->addDataSet(vectorToArray(m_dataSeriesA), 0xff0000, buffer);
sprintf(buffer, "Beta: <*bgColor=CCFFCC*> %.2f ", m_dataSeriesB.back());
layer->addDataSet(vectorToArray(m_dataSeriesB), 0x00cc00, buffer);
sprintf(buffer, "Gamma: <*bgColor=CCCCFF*> %.2f ", m_dataSeriesC.back());
layer->addDataSet(vectorToArray(m_dataSeriesC), 0x0000ff, buffer);
}
// Set the chart image to the WinChartViewer
viewer->setChart(c);
delete c;
}
/////////////////////////////////////////////////////////////////////////////
// General utilities
//
// Get the default background color
//
int CRealTimeDemoDlg::getDefaultBgColor()
{
LOGBRUSH LogBrush;
HBRUSH hBrush = (HBRUSH)SendMessage(WM_CTLCOLORDLG, (WPARAM)CClientDC(this).m_hDC,
(LPARAM)m_hWnd);
::GetObject(hBrush, sizeof(LOGBRUSH), &LogBrush);
int ret = LogBrush.lbColor;
return ((ret & 0xff) << 16) | (ret & 0xff00) | ((ret & 0xff0000) >> 16);
}
//
// Load an icon resource into a button
//
void CRealTimeDemoDlg::loadButtonIcon(int buttonId, int iconId, int width, int height)
{
// Resize the icon to match the screen DPI for high DPI support
HDC screen = ::GetDC(0);
double scaleFactor = GetDeviceCaps(screen, LOGPIXELSX) / 96.0;
::ReleaseDC(0, screen);
width = (int)(width * scaleFactor + 0.5);
height = (int)(height * scaleFactor + 0.5);
GetDlgItem(buttonId)->SendMessage(BM_SETIMAGE, IMAGE_ICON, (LPARAM)::LoadImage(
AfxGetResourceHandle(), MAKEINTRESOURCE(iconId), IMAGE_ICON, width, height, LR_DEFAULTCOLOR));
}
//
// Convert std::vector to a DoubleArray
//
DoubleArray CRealTimeDemoDlg::vectorToArray(const std::vector<double>& v, int startIndex, int length)
{
if ((length < 0) || (length + startIndex > (int)v.size()))
length = ((int)v.size()) - startIndex;
return (length <= 0) ? DoubleArray() : DoubleArray(&(v[startIndex]), length);
} |