//
// Draw the chart and display it in the given viewer
//
void TrackAxis::drawChart(QChartViewer *viewer)
{
// Data for the chart as 2 random data series
RanSeries r(127);
DoubleArray data0 = r.getSeries(180, 10, -1.5, 1.5);
DoubleArray data1 = r.getSeries(180, 150, -15, 15);
DoubleArray timeStamps = r.getDateSeries(180, Chart::chartTime(2011, 1, 1), 86400);
// Create a XYChart object of size 670 x 400 pixels
XYChart *c = new XYChart(670, 400);
// Add a title to the chart using 18 pts Times New Roman Bold Italic font
c->addTitle("Plasma Stabilizer Energy Usage", "timesbi.ttf", 18);
// Set the plotarea at (50, 55) with width 100 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() - 100, 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);
c->yAxis2()->setLabelStyle("arialbd.ttf", 8);
// Set the axis stem to transparent
c->xAxis()->setColors(Chart::Transparent);
c->yAxis()->setColors(Chart::Transparent);
c->yAxis2()->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("Power Usage (Watt)", "arialbi.ttf", 10);
c->yAxis2()->setTitle("Effective Load (kg)", "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 2 data series to the line layer
layer->setXData(timeStamps);
layer->addDataSet(data0, 0xcc0000, "Power Usage");
layer->addDataSet(data1, 0x008800, "Effective Load")->setUseYAxis2();
// Set the chart image to the QChartViewer
viewer->setChart(c);
}
int main(int argc, char *argv[])
{
// The data for the bar chart
double data[] = {450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700};
// The labels for the bar chart
const char *labels[] = {"1996", "1997", "1998", "1999", "2000", "2001", "2002",
"2003", "2004", "2005"};
// Create a XYChart object of size 600 x 360 pixels
XYChart *c = new XYChart(600, 360);
// Add a title to the chart using 18pts Times Bold Italic font
c->addTitle("Annual Revenue for Star Tech", "timesbi.ttf", 18);
// Set the plotarea at (60, 40) and of size 500 x 280 pixels. Use a vertical
// gradient color from light blue (eeeeff) to deep blue (0000cc) as background.
// Set border and grid lines to white (ffffff).
c->setPlotArea(60, 40, 500, 280, c->linearGradientColor(60, 40, 60, 280,
0xeeeeff, 0x0000cc), -1, 0xffffff, 0xffffff);
// Add a multi-color bar chart layer using the supplied data. Use soft lighting
// effect with light direction from left.
c->addBarLayer(DoubleArray(data, sizeof(data)/sizeof(data[0])), IntArray(0, 0)
)->setBorderColor(Chart::Transparent, Chart::softLighting(Chart::Left));
// Set x axis labels using the given labels
c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(labels[0])));
// Draw the ticks between label positions (instead of at label positions)
c->xAxis()->setTickOffset(0.5);
// Add a title to the y axis with 10pts Arial Bold font
c->yAxis()->setTitle("USD (millions)", "arialbd.ttf", 10);
// Set axis label style to 8pts Arial Bold
c->xAxis()->setLabelStyle("arialbd.ttf", 8);
c->yAxis()->setLabelStyle("arialbd.ttf", 8);
// Set axis line width to 2 pixels
c->xAxis()->setWidth(2);
c->yAxis()->setWidth(2);
// Output the chart
c->makeChart("softlightbar.png");
//free up resources
delete c;
return 0;
}
//
// Draw the chart and display it in the given viewer
//
void ZoomScrollTrack2::drawChart(QChartViewer *viewer)
{
// Get the start date and end date that are visible on the chart.
double viewPortStartDate = viewer->getValueAtViewPort("x", viewer->getViewPortLeft());
double viewPortEndDate = viewer->getValueAtViewPort("x", viewer->getViewPortLeft() +
viewer->getViewPortWidth());
// Get the array indexes that corresponds to the visible start and end dates
int startIndex = (int)floor(Chart::bSearch(m_timeStamps, viewPortStartDate));
int endIndex = (int)ceil(Chart::bSearch(m_timeStamps, viewPortEndDate));
int noOfPoints = endIndex - startIndex + 1;
// Extract the part of the data array that are visible.
DoubleArray viewPortTimeStamps = DoubleArray(m_timeStamps.data + startIndex, noOfPoints);
DoubleArray viewPortDataSeriesA = DoubleArray(m_dataSeriesA.data + startIndex, noOfPoints);
DoubleArray viewPortDataSeriesB = DoubleArray(m_dataSeriesB.data + startIndex, noOfPoints);
DoubleArray viewPortDataSeriesC = DoubleArray(m_dataSeriesC.data + startIndex, noOfPoints);
//
// At this stage, we have extracted the visible data. We can use those data to plot the chart.
//
///////////////////////////////////////////////////////////////////////////////////////
// Configure overall chart appearance.
///////////////////////////////////////////////////////////////////////////////////////
// Create an XYChart object of size 650 x 350 pixels, with a white (ffffff) background and grey
// (aaaaaa) border
XYChart *c = new XYChart(650, 350, 0xffffff, 0xaaaaaa);
// Set the plotarea at (55, 55) with width 90 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(55, 55, c->getWidth() - 90, c->getHeight() - 90, c->linearGradientColor(0, 55, 0,
c->getHeight() - 35, 0xf0f6ff, 0xa0c0ff), -1, Chart::Transparent, 0xffffff, 0xffffff);
// As the data can lie outside the plotarea in a zoomed chart, we need enable clipping.
c->setClipping();
// Add a title to the chart using 18 pts Times New Roman Bold Italic font
c->addTitle(" Zooming and Scrolling with Track Line (2)", "timesbi.ttf", 18);
// Add a legend box at (55, 30) using horizontal layout. Use 8pts Arial Bold as font. Set the
// background and border color to Transparent and use line style legend key.
LegendBox *b = c->addLegend(55, 30, false, "arialbd.ttf", 8);
b->setBackground(Chart::Transparent);
b->setLineStyleKey();
// Set the axis stem to transparent
c->xAxis()->setColors(Chart::Transparent);
c->yAxis()->setColors(Chart::Transparent);
// Add axis title using 10pts Arial Bold Italic font
c->yAxis()->setTitle("Ionic Temperature (C)", "arialbi.ttf", 10);
///////////////////////////////////////////////////////////////////////////////////////
// Add data to chart
///////////////////////////////////////////////////////////////////////////////////////
//
// In this example, we represent the data by lines. You may modify the code below to use other
// representations (areas, scatter plot, etc).
//
// Add a line layer for the lines, using a line width of 2 pixels
LineLayer *layer = c->addLineLayer();
layer->setLineWidth(2);
// In this demo, we do not have too many data points. In real code, the chart may contain a lot
// of data points when fully zoomed out - much more than the number of horizontal pixels in this
// plot area. So it is a good idea to use fast line mode.
layer->setFastLineMode();
// Now we add the 3 data series to a line layer, using the color red (ff0000), green
// (00cc00) and blue (0000ff)
layer->setXData(viewPortTimeStamps);
layer->addDataSet(viewPortDataSeriesA, 0xff3333, "Alpha");
layer->addDataSet(viewPortDataSeriesB, 0x008800, "Beta");
layer->addDataSet(viewPortDataSeriesC, 0x3333CC, "Gamma");
///////////////////////////////////////////////////////////////////////////////////////
// Configure axis scale and labelling
///////////////////////////////////////////////////////////////////////////////////////
// Set the x-axis as a date/time axis with the scale according to the view port x range.
viewer->syncDateAxisWithViewPort("x", c->xAxis());
//
// In this demo, the time range can be from a few years to a few days. We demonstrate how to set
// up different date/time format based on the time range.
//
// If all ticks are yearly aligned, then we use "yyyy" as the label format.
c->xAxis()->setFormatCondition("align", 360 * 86400);
c->xAxis()->setLabelFormat("{value|yyyy}");
// If all ticks are monthly aligned, then we use "mmm yyyy" in bold font as the first
// label of a year, and "mmm" for other labels.
c->xAxis()->setFormatCondition("align", 30 * 86400);
c->xAxis()->setMultiFormat(Chart::StartOfYearFilter(), "<*font=bold*>{value|mmm yyyy}",
Chart::AllPassFilter(), "{value|mmm}");
// If all ticks are daily algined, then we use "mmm dd<*br*>yyyy" in bold font as the
// first label of a year, and "mmm dd" in bold font as the first label of a month, and
// "dd" for other labels.
c->xAxis()->setFormatCondition("align", 86400);
c->xAxis()->setMultiFormat(Chart::StartOfYearFilter(),
"<*block,halign=left*><*font=bold*>{value|mmm dd<*br*>yyyy}",
Chart::StartOfMonthFilter(), "<*font=bold*>{value|mmm dd}");
c->xAxis()->setMultiFormat(Chart::AllPassFilter(), "{value|dd}");
// For all other cases (sub-daily ticks), use "hh:nn<*br*>mmm dd" for the first label of
// a day, and "hh:nn" for other labels.
c->xAxis()->setFormatCondition("else");
c->xAxis()->setMultiFormat(Chart::StartOfDayFilter(),
"<*font=bold*>{value|hh:nn<*br*>mmm dd}", Chart::AllPassFilter(), "{value|hh:nn}");
///////////////////////////////////////////////////////////////////////////////////////
// Output the chart
///////////////////////////////////////////////////////////////////////////////////////
// We need to update the track line too. If the mouse is moving on the chart (eg. if
// the user drags the mouse on the chart to scroll it), the track line will be updated
// in the MouseMovePlotArea event. Otherwise, we need to update the track line here.
if ((!viewer->isInMouseMoveEvent()) && viewer->isMouseOnPlotArea())
trackLineLabel(c, viewer->getPlotAreaMouseX());
delete viewer->getChart();
viewer->setChart(c);
}
int main(int argc, char *argv[])
{
// The data for the area chart
double data[] = {30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55,
53, 35, 50, 66, 56, 48, 52, 65, 62};
// The labels for the area chart
const char *labels[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10",
"11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
"24"};
// Create a XYChart object of size 600 x 360 pixels, with a brushed silver
// background, 1 pixel 3D border effect, rounded corners and soft drop shadow.
XYChart *c = new XYChart(600, 360, Chart::brushedSilverColor(),
Chart::Transparent, 1);
c->setRoundedFrame();
c->setDropShadow();
// Add a title box to the chart using 18 pts Times Bold Italic font.
TextBox *title = c->addTitle(
"<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance "
"Enhancer <*img=star.png*><*img=star.png*><*/*>", "timesbi.ttf", 18);
//
// Use a text box with a depressed 3D border to create the inner depressed region
//
// The width of the frame border
int frameWidth = 5;
// Set the depressed region position
TextBox *contentBox = c->addText(frameWidth, title->getHeight(), "");
contentBox->setSize(c->getDrawArea()->getWidth() - 1 - frameWidth * 2,
c->getDrawArea()->getHeight() - title->getHeight() - frameWidth - 1);
// Use -1 as the rasied effect to create a depressed region
contentBox->setBackground(Chart::Transparent, Chart::Transparent, -1);
// Set rounded corners, and put the text box at the back of the chart
contentBox->setRoundedCorners(10);
contentBox->setZOrder(Chart::ChartBackZ);
// Tentatively set the plotarea to 50 pixels from the left depressed edge, and 25
// pixels under the top depressed edge. Set the width to 75 pixels less than the
// depressed region width, and the height to 75 pixels less than the depressed
// region height. Use white (ffffff) background, transparent border, and grey
// (cccccc) horizontal and vertical grid lines.
PlotArea *plotArea = c->setPlotArea(50 + contentBox->getLeftX(),
contentBox->getTopY() + 25, contentBox->getWidth() - 75,
contentBox->getHeight() - 75, 0xffffff, -1, -1, 0xcccccc, -1);
// Add a title to the y axis
c->yAxis()->setTitle("Energy Concentration (KJ per liter)");
// Set the labels on the x axis.
c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(labels[0])));
// Display 1 out of 3 labels on the x-axis.
c->xAxis()->setLabelStep(3);
// Add a title to the x axis using CDML
c->xAxis()->setTitle(
"<*block,valign=absmiddle*><*img=clock.png*> Elapsed Time (hour)<*/*>");
// Set the axes width to 2 pixels
c->xAxis()->setWidth(2);
c->yAxis()->setWidth(2);
// Add an area layer to the chart using a gradient color that changes vertically
// from semi-transparent red (60ff0000) to semi-transparent white (60ffffff)
c->addAreaLayer(DoubleArray(data, sizeof(data)/sizeof(data[0])),
c->linearGradientColor(0, contentBox->getTopY() + 20, 0, contentBox->getTopY(
) + contentBox->getHeight() - 50, 0x60ff0000, 0x60ffffff));
// Adjust the plot area size, such that the bounding box (inclusive of axes) is
// 15 pixels from the left depressed edge, 25 pixels below the top depressed
// edge, 25 pixels from the right depressed edge, and 15 pixels above the bottom
// depressed edge.
c->packPlotArea(contentBox->getLeftX() + 15, contentBox->getTopY() + 25,
contentBox->getLeftX() + contentBox->getWidth() - 25, contentBox->getTopY() +
contentBox->getHeight() - 15);
// Add a custom CDML text with the bottom right corner is anchored to the bootom
// right corner of the plot area, with 5 pixels margin.
c->addText(plotArea->getLeftX() + plotArea->getWidth() - 5, plotArea->getTopY() +
plotArea->getHeight() - 5,
"<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*>"
"<*font=timesbi.ttf,size=10,color=804040*>Molecular\nEngineering<*/*>"
)->setAlignment(Chart::BottomRight);
// Output the chart
c->makeChart("enhancedarea.jpg");
//free up resources
delete c;
return 0;
}
int main(int argc, char *argv[])
{
// In this example, the data points are unevenly spaced on the x-axis
double dataY[] = {4.7, 4.7, 6.6, 2.2, 4.7, 4.0, 4.0, 5.1, 4.5, 4.5, 6.8, 4.5, 4, 2.1, 3, 2.5,
2.5, 3.1};
double dataX[] = {Chart::chartTime(1999, 7, 1), Chart::chartTime(2000, 1, 1), Chart::chartTime(
2000, 2, 1), Chart::chartTime(2000, 4, 1), Chart::chartTime(2000, 5, 8), Chart::chartTime(
2000, 7, 5), Chart::chartTime(2001, 3, 5), Chart::chartTime(2001, 4, 7), Chart::chartTime(
2001, 5, 9), Chart::chartTime(2002, 2, 4), Chart::chartTime(2002, 4, 4), Chart::chartTime(
2002, 5, 8), Chart::chartTime(2002, 7, 7), Chart::chartTime(2002, 8, 30), Chart::chartTime(
2003, 1, 2), Chart::chartTime(2003, 2, 16), Chart::chartTime(2003, 11, 6), Chart::chartTime(
2004, 1, 4)};
// Data points are assigned different symbols based on point type
double pointType[] = {0, 1, 0, 1, 2, 1, 0, 0, 1, 1, 2, 2, 1, 0, 2, 1, 2, 0};
// Create a XYChart object of size 480 x 320 pixels. Use a vertical gradient color from pale
// blue (e8f0f8) to sky blue (aaccff) spanning half the chart height as background. Set border
// to blue (88aaee). Use rounded corners. Enable soft drop shadow.
XYChart *c = new XYChart(480, 320);
c->setBackground(c->linearGradientColor(0, 0, 0, c->getHeight() / 2, 0xe8f0f8, 0xaaccff),
0x88aaee);
c->setRoundedFrame();
c->setDropShadow();
// Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to 12
// pixels.
TextBox *title = c->addTitle("Multi-Symbol Line Chart Demo", "ariali.ttf", 15);
title->setMargin(0, 0, 12, 12);
// Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis, and to
// just under the title. Set the width to 65 pixels less than the chart width, and the height to
// reserve 90 pixels at the bottom for the x-axis and the legend box. Use pale blue (e8f0f8)
// background, transparent border, and grey (888888) dotted horizontal and vertical grid lines.
c->setPlotArea(50, title->getHeight(), c->getWidth() - 65, c->getHeight() - title->getHeight() -
90, 0xe8f0f8, -1, Chart::Transparent, c->dashLineColor(0x888888, Chart::DotLine), -1);
// Add a legend box where the bottom-center is anchored to the 12 pixels above the bottom-center
// of the chart. Use horizontal layout and 8 points Arial font.
LegendBox *legendBox = c->addLegend(c->getWidth() / 2, c->getHeight() - 12, false,
"arialbd.ttf", 8);
legendBox->setAlignment(Chart::BottomCenter);
// Set the legend box background and border to pale blue (e8f0f8) and bluish grey (445566)
legendBox->setBackground(0xe8f0f8, 0x445566);
// Use rounded corners of 5 pixel radius for the legend box
legendBox->setRoundedCorners(5);
// Set the y axis label format to display a percentage sign
c->yAxis()->setLabelFormat("{value}%");
// Set y-axis title to use 10 points Arial Bold Italic font
c->yAxis()->setTitle("Axis Title Placeholder", "arialbi.ttf", 10);
// Set axis labels to use Arial Bold font
c->yAxis()->setLabelStyle("arialbd.ttf");
c->xAxis()->setLabelStyle("arialbd.ttf");
// We add the different data symbols using scatter layers. The scatter layers are added before
// the line layer to make sure the data symbols stay on top of the line layer.
// We select the points with pointType = 0 (the non-selected points will be set to NoValue), and
// use yellow (ffff00) 15 pixels high 5 pointed star shape symbols for the points. (This example
// uses both x and y coordinates. For charts that have no x explicitly coordinates, use an empty
// array as dataX.)
c->addScatterLayer(DoubleArray(dataX, (int)(sizeof(dataX) / sizeof(dataX[0]))), ArrayMath(
DoubleArray(dataY, (int)(sizeof(dataY) / sizeof(dataY[0])))).selectEQZ(DoubleArray(
pointType, (int)(sizeof(pointType) / sizeof(pointType[0]))), Chart::NoValue),
"Point Type 0", Chart::StarShape(5), 15, 0xffff00);
// Similar to above, we select the points with pointType - 1 = 0 and use green (ff00) 13 pixels
// high six-sided polygon as symbols.
c->addScatterLayer(DoubleArray(dataX, (int)(sizeof(dataX) / sizeof(dataX[0]))), ArrayMath(
DoubleArray(dataY, (int)(sizeof(dataY) / sizeof(dataY[0])))).selectEQZ(ArrayMath(
DoubleArray(pointType, (int)(sizeof(pointType) / sizeof(pointType[0])))).sub(1),
Chart::NoValue), "Point Type 1", Chart::PolygonShape(6), 13, 0x00ff00);
// Similar to above, we select the points with pointType - 2 = 0 and use red (ff0000) 13 pixels
// high X shape as symbols.
c->addScatterLayer(DoubleArray(dataX, (int)(sizeof(dataX) / sizeof(dataX[0]))), ArrayMath(
DoubleArray(dataY, (int)(sizeof(dataY) / sizeof(dataY[0])))).selectEQZ(ArrayMath(
DoubleArray(pointType, (int)(sizeof(pointType) / sizeof(pointType[0])))).sub(2),
Chart::NoValue), "Point Type 2", Chart::Cross2Shape(), 13, 0xff0000);
// Finally, add a blue (0000ff) line layer with line width of 2 pixels
LineLayer *layer = c->addLineLayer(DoubleArray(dataY, (int)(sizeof(dataY) / sizeof(dataY[0]))),
0x0000ff);
layer->setXData(DoubleArray(dataX, (int)(sizeof(dataX) / sizeof(dataX[0]))));
layer->setLineWidth(2);
// Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels from
// the left edge, just below the title, 25 pixels from the right edge, and 8 pixels above the
// legend box.
c->packPlotArea(10, title->getHeight(), c->getWidth() - 25, c->layoutLegend()->getTopY() - 8);
// Output the chart
c->makeChart("multisymbolline.png");
//free up resources
delete c;
return 0;
}
int main(int argc, char *argv[])
{
// The data for the bar chart
double data0[] = {100, 125, 245, 147, 67};
double data1[] = {85, 156, 179, 211, 123};
double data2[] = {97, 87, 56, 267, 157};
const char *labels[] = {"Mon", "Tue", "Wed", "Thur", "Fri"};
// Create a XYChart object of size 540 x 375 pixels
XYChart *c = new XYChart(540, 375);
// Add a title to the chart using 18pt Times Bold Italic font
c->addTitle("Average Weekly Network Load", "timesbi.ttf", 18);
// Set the plotarea at (50, 55) and of 440 x 280 pixels in size. Use a vertical gradient color
// from light red (ffdddd) to dark red (880000) as background. Set border and grid lines to
// white (ffffff).
c->setPlotArea(50, 55, 440, 280, c->linearGradientColor(0, 55, 0, 335, 0xffdddd, 0x880000), -1,
0xffffff, 0xffffff);
// Add a legend box at (50, 25) using horizontal layout. Use 10pt Arial Bold as font, with
// transparent background.
c->addLegend(50, 25, false, "arialbd.ttf", 10)->setBackground(Chart::Transparent);
// Set the x axis labels
c->xAxis()->setLabels(StringArray(labels, (int)(sizeof(labels) / sizeof(labels[0]))));
// Draw the ticks between label positions (instead of at label positions)
c->xAxis()->setTickOffset(0.5);
// Set axis label style to 8pt Arial Bold
c->xAxis()->setLabelStyle("arialbd.ttf", 8);
c->yAxis()->setLabelStyle("arialbd.ttf", 8);
// Set axis line width to 2 pixels
c->xAxis()->setWidth(2);
c->yAxis()->setWidth(2);
// Add axis title
c->yAxis()->setTitle("Throughput (MBytes Per Hour)");
// Add a multi-bar layer with 3 data sets and 4 pixels 3D depth
BarLayer *layer = c->addBarLayer(Chart::Side, 4);
layer->addDataSet(DoubleArray(data0, (int)(sizeof(data0) / sizeof(data0[0]))), 0xffff00,
"Server #1");
layer->addDataSet(DoubleArray(data1, (int)(sizeof(data1) / sizeof(data1[0]))), 0x00ff00,
"Server #2");
layer->addDataSet(DoubleArray(data2, (int)(sizeof(data2) / sizeof(data2[0]))), 0x9999ff,
"Server #3");
// Set bar border to transparent. Use soft lighting effect with light direction from top.
layer->setBorderColor(Chart::Transparent, Chart::softLighting(Chart::Top));
// Configure the bars within a group to touch each others (no gap)
layer->setBarGap(0.2, Chart::TouchBar);
// Output the chart
c->makeChart("softmultibar.png");
//free up resources
delete c;
return 0;
}
int main(int argc, char *argv[])
{
// The data for the chart
double data[] = {800, 600, 1000, 1400};
double widths[] = {250, 500, 960, 460};
const char *labels[] = {"Wind", "Hydro", "Coal", "Natural Gas"};
// The colors to use
int colors[] = {0x00aa00, 0x66aaee, 0xee6622, 0xffbb00};
// Create a XYChart object of size 500 x 350 pixels
XYChart *c = new XYChart(500, 350);
// Add a title to the chart using 15 pts Arial Italic font
c->addTitle("Energy Generation Breakdown", "ariali.ttf", 15);
// Set the plotarea at (60, 60) and of (chart_width - 90) x (chart_height - 100)
// in size. Use a vertical gradient color from light blue (f9f9ff) to sky blue
// (aaccff) as background. Set grid lines to white (ffffff).
int plotAreaBgColor = c->linearGradientColor(0, 60, 0, c->getHeight() - 40,
0xaaccff, 0xf9fcff);
c->setPlotArea(60, 60, c->getWidth() - 90, c->getHeight() - 100, plotAreaBgColor,
-1, -1, 0xffffff);
// Add a legend box at (50, 30) using horizontal layout and transparent
// background.
c->addLegend(55, 30, false)->setBackground(Chart::Transparent);
// Add titles to x/y axes with 10 points Arial Bold font
c->xAxis()->setTitle("Mega Watts", "arialbd.ttf", 10);
c->yAxis()->setTitle("Cost per MWh (dollars)", "arialbd.ttf", 10);
// Set the x axis rounding to false, so that the x-axis will fit the data exactly
c->xAxis()->setRounding(false, false);
// In ChartDirector, there is no bar layer that can have variable bar widths, but
// you may create a bar using an area layer. (A bar can be considered as the area
// under a rectangular outline.) So by using a loop to create one bar per area
// layer, we can achieve a variable width bar chart.
// starting position of current bar
double currentX = 0;
int i;
for(i = 0; i < sizeof(data) / sizeof(data[0]); ++i) {
// ending position of current bar
double nextX = currentX + widths[i];
// outline of the bar
double dataX[] = {currentX, currentX, nextX, nextX};
double dataY[] = {0, data[i], data[i], 0};
// create the area layer to fill the bar
AreaLayer *layer = c->addAreaLayer(DoubleArray(dataY,
sizeof(dataY)/sizeof(dataY[0])), colors[i], labels[i]);
layer->setXData(DoubleArray(dataX, sizeof(dataX)/sizeof(dataX[0])));
// the ending position becomes the starting position of the next bar
currentX = nextX;
}
// Output the chart
c->makeChart("varwidthbar.png");
//free up resources
delete c;
return 0;
}
