// TrackLabelDlg.cpp : implementation file
//
#include "stdafx.h"
#include "resource.h"
#include "TrackLabelDlg.h"
#include "chartdir.h"
#include <sstream>
#include <algorithm>
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
//
// Constructor
//
CTrackLabelDlg::CTrackLabelDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(IDD_TRACKCURSOR_DEMO, pParent)
{
SetBackgroundColor(RGB(255, 255, 255));
}
//
// Destructor
//
CTrackLabelDlg::~CTrackLabelDlg()
{
delete m_ChartViewer.getChart();
}
void CTrackLabelDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
DDX_Control(pDX, IDC_ChartViewer, m_ChartViewer);
}
BEGIN_MESSAGE_MAP(CTrackLabelDlg, CDialogEx)
ON_CONTROL(CVN_MouseMovePlotArea, IDC_ChartViewer, OnMouseMovePlotArea)
END_MESSAGE_MAP()
//
// Initialization
//
BOOL CTrackLabelDlg::OnInitDialog()
{
CDialogEx::OnInitDialog();
SetWindowTextW(L"Track Line with Data 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 CTrackLabelDlg::OnMouseMovePlotArea()
{
trackLineLabel((XYChart *)m_ChartViewer.getChart(), m_ChartViewer.getPlotAreaMouseX());
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 CTrackLabelDlg::drawChart(CChartViewer *viewer)
{
// Data for the chart as 3 random data series
RanSeries r(127);
DoubleArray data0 = r.getSeries(100, 100, -15, 15);
DoubleArray data1 = r.getSeries(100, 150, -15, 15);
DoubleArray data2 = r.getSeries(100, 200, -15, 15);
DoubleArray timeStamps = r.getDateSeries(100, Chart::chartTime(2011, 1, 1), 86400);
// Create a XYChart object of size 640 x 400 pixels
XYChart *c = new XYChart(640, 400);
// Add a title to the chart using 18 pts Times New Roman Bold Italic font
c->addTitle(" Product Line Global Revenue", "timesbi.ttf", 18);
// Set the plotarea at (50, 55) with width 70 pixels less than chart width, and height 90 pixels
// less than chart height. Use a vertical gradient from light blue (f0f6ff) to sky blue (a0c0ff)
// as background. Set border to transparent and grid lines to white (ffffff).
c->setPlotArea(50, 55, c->getWidth() - 70, c->getHeight() - 90, c->linearGradientColor(0, 55, 0,
c->getHeight() - 35, 0xf0f6ff, 0xa0c0ff), -1, Chart::Transparent, 0xffffff, 0xffffff);
// Add a legend box at (50, 25) using horizontal layout. Use 10pts Arial Bold as font. Set the
// background and border color to Transparent.
c->addLegend(50, 25, false, "arialbd.ttf", 10)->setBackground(Chart::Transparent);
// Set axis label style to 8pts Arial Bold
c->xAxis()->setLabelStyle("arialbd.ttf", 8);
c->yAxis()->setLabelStyle("arialbd.ttf", 8);
// Set the axis stem to transparent
c->xAxis()->setColors(Chart::Transparent);
c->yAxis()->setColors(Chart::Transparent);
// Configure x-axis label format
c->xAxis()->setMultiFormat(Chart::StartOfYearFilter(), "{value|mm/yyyy} ",
Chart::StartOfMonthFilter(), "{value|mm}");
// Add axis title using 10pts Arial Bold Italic font
c->yAxis()->setTitle("USD millions", "arialbi.ttf", 10);
// Add a line layer to the chart using a line width of 2 pixels.
LineLayer *layer = c->addLineLayer();
layer->setLineWidth(2);
// Add 3 data series to the line layer
layer->setXData(timeStamps);
layer->addDataSet(data0, 0xff3333, "Alpha");
layer->addDataSet(data1, 0x008800, "Beta");
layer->addDataSet(data2, 0x3333cc, "Gamma");
// Assign the chart to the WinChartViewer
viewer->setChart(c);
}
//
// Draw track line with data labels
//
void CTrackLabelDlg::trackLineLabel(XYChart *c, int mouseX)
{
// 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();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
double xValue = c->getNearestXValue(mouseX);
int xCoor = c->getXCoor(xValue);
// Draw a vertical track line at the x-position
d->vline(plotArea->getTopY(), plotArea->getBottomY(), xCoor,
d->dashLineColor(0x000000, 0x0101));
// Draw a label on the x-axis to show the track line position.
std::ostringstream xlabel;
xlabel << "<*font,bgColor=000000*> " << c->xAxis()->getFormattedLabel(xValue, "mmm dd, yyyy")
<< " <*/font*>";
TTFText *t = d->text(xlabel.str().c_str(), "arialbd.ttf", 8);
// Restrict the x-pixel position of the label to make sure it stays inside the chart image.
int xLabelPos = (std::max)(0, (std::min)(xCoor - t->getWidth() / 2, c->getWidth() - t->getWidth()));
t->draw(xLabelPos, plotArea->getBottomY() + 6, 0xffffff);
t->destroy();
// Iterate through all layers to draw the data labels
for (int i = 0; i < c->getLayerCount(); ++i) {
Layer *layer = c->getLayerByZ(i);
// The data array index of the x-value
int xIndex = layer->getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (int j = 0; j < layer->getDataSetCount(); ++j)
{
DataSet *dataSet = layer->getDataSetByZ(j);
const char *dataSetName = dataSet->getDataName();
// Get the color, name and position of the data label
int color = dataSet->getDataColor();
int yCoor = c->getYCoor(dataSet->getPosition(xIndex), dataSet->getUseYAxis());
// Draw a track dot with a label next to it for visible data points in the plot area
if ((yCoor >= plotArea->getTopY()) && (yCoor <= plotArea->getBottomY()) && (color !=
Chart::Transparent) && dataSetName && *dataSetName)
{
d->circle(xCoor, yCoor, 4, 4, color, color);
std::ostringstream label;
label << "<*font,bgColor=" << std::hex << color << "*> "
<< c->formatValue(dataSet->getValue(xIndex), "{value|P4}") << " <*font*>";
t = d->text(label.str().c_str(), "arialbd.ttf", 8);
// Draw the label on the right side of the dot if the mouse is on the left side the
// chart, and vice versa. This ensures the label will not go outside the chart image.
if (xCoor <= (plotArea->getLeftX() + plotArea->getRightX()) / 2)
t->draw(xCoor + 5, yCoor, 0xffffff, Chart::Left);
else
t->draw(xCoor - 5, yCoor, 0xffffff, Chart::Right);
t->destroy();
}
}
}
} |