Crosshair with Axis Labels (MFC)

[MFC version] mfcdemo/CrossHairDlg.cpp
// CrossHairDlg.cpp : implementation file
//

#include "stdafx.h"
#include "resource.h"
#include "crosshairDlg.h"
#include "chartdir.h"
#include <sstream>

using namespace std;

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

//
// Constructor
//
CCrossHairDlg::CCrossHairDlg(CWnd* pParent /*=NULL*/)
    : CDialogEx(IDD_TRACKCURSOR_DEMO, pParent)
{
    SetBackgroundColor(RGB(255, 255, 255));
}

//
// Destructor
//
CCrossHairDlg::~CCrossHairDlg()
{
    delete m_ChartViewer.getChart();
}

void CCrossHairDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
    DDX_Control(pDX, IDC_ChartViewer, m_ChartViewer);
}

BEGIN_MESSAGE_MAP(CCrossHairDlg, CDialogEx)
    ON_CONTROL(CVN_MouseMovePlotArea, IDC_ChartViewer, OnMouseMovePlotArea)
END_MESSAGE_MAP()


//
// Initialization
//
BOOL CCrossHairDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    SetWindowText(_T("Crosshair with Axis Labels"));
    
    // Draw the chart
    drawChart(&m_ChartViewer);

     // Resize the window to fit the chart size
    CRect winSize;
    m_ChartViewer.GetWindowRect(winSize);
    m_ChartViewer.MoveWindow(5, 5, winSize.Width(), winSize.Height());
    CalcWindowRect(&winSize, CWnd::adjustBorder);
    SetWindowPos(&wndTop, 0, 0, winSize.Width() + 10, winSize.Height() + 10, SWP_NOMOVE);
 
    return TRUE; 
}

//
// Draw track cursor when mouse is moving over plotarea
//
void CCrossHairDlg::OnMouseMovePlotArea()
{
    // Draw crosshair track cursor
    crosshair((XYChart *)m_ChartViewer.getChart(), m_ChartViewer.getPlotAreaMouseX(),
        m_ChartViewer.getPlotAreaMouseY());
    m_ChartViewer.updateDisplay();

    // Hide the track cursor when the mouse leaves the plot area
    m_ChartViewer.removeDynamicLayer(CVN_MouseLeavePlotArea);
}

//
// Draw the chart and display it in the given viewer
//
void CCrossHairDlg::drawChart(CChartViewer *viewer)
{
    // The XY data of the first data series
    double dataX[] = {50, 55, 37, 24, 42, 49, 63, 72, 83, 59};
    double dataY[] = {3.6, 2.8, 2.5, 2.3, 3.8, 3.0, 3.8, 5.0, 6.0, 3.3};
    int noOfPoints = (int)(sizeof(dataX) / sizeof(*dataX));

    // Create a XYChart object of size 520 x 490 pixels
    XYChart *c = new XYChart(520, 490);

    // Set the plotarea at (60, 40) and of size 450 x 400 pixels, with white background and a light
    // grey border (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
    // (0xc0c0c0)
    c->setPlotArea(60, 40, 450, 400, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1);

    // Add a title to the chart using 18 point Times Bold Itatic font.
    c->addTitle("      Chemical X Thermal Conductivity", "Times New Roman Bold Italic", 18);

    // Add titles to the axes using 12 pts Arial Bold Italic font
    c->yAxis()->setTitle("Thermal Conductivity (W/K)", "Arial Bold Italic", 12);
    c->xAxis()->setTitle("Concentration (g/liter)", "Arial Bold Italic", 12);

    // Set the axes line width to 3 pixels
    c->yAxis()->setWidth(3);
    c->xAxis()->setWidth(3);

    // Add a scatter layer using (dataX, dataY)
    ScatterLayer *scatterLayer = c->addScatterLayer(DoubleArray(dataX, noOfPoints), 
        DoubleArray(dataY, noOfPoints), "", Chart::GlassSphereShape, 13, 0xcc0000);

    // Tooltip for the scatter layer
    scatterLayer->setHTMLImageMap("", "",
        "title='<*cdml*>Concentration: {x} g/liter<*br*>Conductivity: {value} W/K'");

    // Add a trend line layer for (dataX, dataY)
    TrendLayer *trendLayer = c->addTrendLayer(DoubleArray(dataX, noOfPoints), 
        DoubleArray(dataY, noOfPoints), 0xcc0000);

    // Set the line width to 3 pixels
    trendLayer->setLineWidth(3);

    // Add a 95% confidence band for the line
    trendLayer->addConfidenceBand(0.95, 0x806666ff);

    // Add a 95% confidence band (prediction band) for the points
    trendLayer->addPredictionBand(0.95, 0x8066ff66);

    // Tool tip for the trend layer
    trendLayer->setHTMLImageMap("", "", 
        "title='<*cdml*>Trend Line: y = {slope|P4} x + {intercept|P4}'");

    // Add a legend box at (60, 35) (top of the chart) with horizontal layout. Use 10 pts Arial Bold
    // Italic font. Set the background and border color to Transparent and use line style legend
    // icons.
    LegendBox *legendBox = c->addLegend(60, 35, false, "Arial Bold Italic", 9);
    legendBox->setBackground(Chart::Transparent);
    legendBox->setLineStyleKey(true);

    // Add entries to the legend box
    legendBox->addKey("95% Line Confidence", 0x806666ff);
    legendBox->addKey("95% Point Confidence", 0x8066ff66);

    ostringstream trendLegend;
    trendLegend << "Trend Line: y = " << c->formatValue(trendLayer->getSlope(), "{value|4}") << " x";
    trendLegend << " + " << c->formatValue(trendLayer->getIntercept(), "{value|4}");
    legendBox->addKey(trendLegend.str().c_str(), 0xcc0000, 3);

    // Assign the chart to the WinChartViewer
    viewer->setChart(c);

    // Include tool tip for the chart
    viewer->setImageMap(c->getHTMLImageMap(""));
}

//
// Draw cross hair cursor with axis labels
//
void CCrossHairDlg::crosshair(XYChart *c, int mouseX, int mouseY)
{
    // Clear the current dynamic layer and get the DrawArea object to draw on it.
    DrawArea *d = c->initDynamicLayer();

    // The plot area object
    PlotArea *plotArea = c->getPlotArea();

    // Draw a vertical line and a horizontal line as the cross hair
    d->vline(plotArea->getTopY(), plotArea->getBottomY(), mouseX, d->dashLineColor(0x000000, 0x0101));
    d->hline(plotArea->getLeftX(), plotArea->getRightX(), mouseY, d->dashLineColor(0x000000, 0x0101));

    // Draw y-axis label
    ostringstream ylabel;
    ylabel << "<*block,bgColor=FFFFDD,margin=3,edgeColor=000000*>" << c->formatValue(c->getYValue(
        mouseY, c->yAxis()), "{value|P4}") << "<*/*>";
    TTFText *t = d->text(ylabel.str().c_str(), "Arial Bold", 8);
    t->draw(plotArea->getLeftX() - 5, mouseY, 0x000000, Chart::Right);
    t->destroy();

    // Draw x-axis label
    ostringstream xlabel;
    xlabel << "<*block,bgColor=FFFFDD,margin=3,edgeColor=000000*>" << c->formatValue(c->getXValue(
        mouseX), "{value|P4}") << "<*/*>";
    t = d->text(xlabel.str().c_str(), "Arial Bold", 8);
    t->draw(mouseX, plotArea->getBottomY() + 5, 0x000000, Chart::Top);
    t->destroy();
}