int main(int argc, char *argv[])
{
// The data for the area chart
double data[] = {3.0, 2.8, 4.0, 5.5, 7.5, 6.8, 5.4, 6.0, 5.0, 6.2, 7.5, 6.5, 7.5,
8.1, 6.0, 5.5, 5.3, 3.5, 5.0, 6.6, 5.6, 4.8, 5.2, 6.5, 6.2};
// 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 300 x 180 pixels. Set the background to pale
// yellow (0xffffa0) with a black border (0x0)
XYChart *c = new XYChart(300, 180, 0xffffa0, 0x000000);
// Set the plotarea at (45, 35) and of size 240 x 120 pixels. Set the background
// to white (0xffffff). Set both horizontal and vertical grid lines to black
// (&H0&) dotted lines (pattern code 0x0103)
c->setPlotArea(45, 35, 240, 120, 0xffffff, -1, -1, c->dashLineColor(0x000000,
0x000103), c->dashLineColor(0x000000, 0x000103));
// Add a title to the chart using 10 pts Arial Bold font. Use a 1 x 2 bitmap
// pattern as the background. Set the border to black (0x0).
int pattern1[] = {0xb0b0f0, 0xe0e0ff};
c->addTitle("Snow Percipitation (Dec 12)", "arialbd.ttf", 10)->setBackground(
c->patternColor(IntArray(pattern1, sizeof(pattern1)/sizeof(pattern1[0])), 2),
0x000000);
// Add a title to the y axis
c->yAxis()->setTitle("mm per hour");
// 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 an area layer to the chart
AreaLayer *layer = c->addAreaLayer();
// Load a snow pattern from an external file "snow.png".
int snowPattern = c->patternColor("snow.png");
// Add a data set to the area layer using the snow pattern as the fill color. Use
// deep blue (0x0000ff) as the area border line color (&H0000ff&)
layer->addDataSet(DoubleArray(data, sizeof(data)/sizeof(data[0])))->setDataColor(
snowPattern, 0x0000ff);
// Set the line width to 2 pixels to highlight the line
layer->setLineWidth(2);
// output the chart
c->makeChart("patternarea.png");
//free up resources
delete c;
return 0;
}
int main(int argc, char *argv[])
{
// The data for the area chart
double data0[] = {42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70,
76, 63, 67, 75, 64, 51};
double data1[] = {50, 45, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73,
77, 84, 82, 80, 84, 89};
double data2[] = {61, 79, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16, 25,
9, 10, 5, 7, 16};
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 500 x 300 pixels
XYChart *c = new XYChart(500, 300);
// Set the plotarea at (90, 30) and of size 300 x 240 pixels.
c->setPlotArea(90, 30, 300, 240);
// Add a legend box at (405, 100)
c->addLegend(405, 100);
// Add a title to the chart
c->addTitle("Daily System Load");
// Add a title to the y axis. Draw the title upright (font angle = 0)
c->yAxis()->setTitle("Database\nQueries\n(per sec)")->setFontAngle(0);
// Set the labels on the x axis.
c->xAxis()->setLabels(StringArray(labels, (int)(sizeof(labels) / sizeof(labels[0]))));
// Display 1 out of 2 labels on the x-axis. Show minor ticks for remaining labels.
c->xAxis()->setLabelStep(2, 1);
// Add an area layer
AreaLayer *layer = c->addAreaLayer();
// Draw the area layer in 3D
layer->set3D();
// Add the three data sets to the area layer
layer->addDataSet(DoubleArray(data0, (int)(sizeof(data0) / sizeof(data0[0]))), -1, "Server # 1")
;
layer->addDataSet(DoubleArray(data1, (int)(sizeof(data1) / sizeof(data1[0]))), -1, "Server # 2")
;
layer->addDataSet(DoubleArray(data2, (int)(sizeof(data2) / sizeof(data2[0]))), -1, "Server # 3")
;
// Output the chart
c->makeChart("threedstackarea.png");
//free up resources
delete c;
return 0;
}
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
double 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 320 x 320 pixels
XYChart *c = new XYChart(320, 320);
// Swap the x and y axis to become a rotated chart
c->swapXY();
// Set the y axis on the top side (right + rotated = top)
c->setYAxisOnRight();
// Reverse the x axis so it is pointing downwards
c->xAxis()->setReverse();
// Set the plotarea at (50, 50) and of size 200 x 200 pixels. Enable horizontal and vertical
// grids by setting their colors to grey (0xc0c0c0).
c->setPlotArea(50, 50, 250, 250)->setGridColor(0xc0c0c0, 0xc0c0c0);
// Add a line chart layer using the given data
c->addAreaLayer(DoubleArray(data, (int)(sizeof(data) / sizeof(data[0]))), c->gradientColor(50,
0, 300, 0, 0xffffff, 0x0000ff));
// Set the labels on the x axis. Append "m" after the value to show the unit.
c->xAxis()->setLabels(DoubleArray(labels, (int)(sizeof(labels) / sizeof(labels[0]))),
"{value} m");
// Display 1 out of 3 labels.
c->xAxis()->setLabelStep(3);
// Add a title to the x axis
c->xAxis()->setTitle("Depth");
// Add a title to the y axis
c->yAxis()->setTitle("Carbon Dioxide Concentration (ppm)");
// Output the chart
c->makeChart("rotatedarea.png");
//free up resources
delete c;
return 0;
}
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 300 x 300 pixels
XYChart *c = new XYChart(300, 300);
// Set the plotarea at (45, 30) and of size 200 x 200 pixels
c->setPlotArea(45, 30, 200, 200);
// Add a title to the chart using 12 pts Arial Bold Italic font
c->addTitle("Daily Server Utilization", "arialbi.ttf", 12);
// Add a title to the y axis
c->yAxis()->setTitle("MBytes");
// Add a title to the x axis
c->xAxis()->setTitle("June 12, 2001");
// Add a green (0x00ff00) 3D area chart layer using the give data
c->addAreaLayer(DoubleArray(data, sizeof(data)/sizeof(data[0])), 0x00ff00
)->set3D();
// 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);
// Output the chart
c->makeChart("threedarea.png");
//free up resources
delete c;
return 0;
}
int main(int argc, char *argv[])
{
// The data for the area chart
double data0[] = {42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56,
56, 60, 70, 76, 63, 67, 75, 64, 51};
double data1[] = {50, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67,
58, 59, 73, 77, 84, 82, 80, 84, 98};
double data2[] = {87, 89, 85, 66, 53, 39, 24, 21, 37, 56, 37, 23, 21, 33, 13, 17,
14, 23, 16, 25, 29, 30, 45, 47, 46};
// The timestamps on the x-axis
double labels[] = {chartTime(1996, 1, 1), chartTime(1996, 4, 1), chartTime(1996,
7, 1), chartTime(1996, 10, 1), chartTime(1997, 1, 1), chartTime(1997, 4, 1),
chartTime(1997, 7, 1), chartTime(1997, 10, 1), chartTime(1998, 1, 1),
chartTime(1998, 4, 1), chartTime(1998, 7, 1), chartTime(1998, 10, 1),
chartTime(1999, 1, 1), chartTime(1999, 4, 1), chartTime(1999, 7, 1),
chartTime(1999, 10, 1), chartTime(2000, 1, 1), chartTime(2000, 4, 1),
chartTime(2000, 7, 1), chartTime(2000, 10, 1), chartTime(2001, 1, 1),
chartTime(2001, 4, 1), chartTime(2001, 7, 1), chartTime(2001, 10, 1),
chartTime(2002, 1, 1)};
// Create a XYChart object of size 500 x 280 pixels, using 0xffffcc as background
// color, with a black border, and 1 pixel 3D border effect
XYChart *c = new XYChart(500, 280, 0xffffcc, 0, 1);
// Set the plotarea at (50, 45) and of size 320 x 200 pixels with white
// background. Enable horizontal and vertical grid lines using the grey
// (0xc0c0c0) color.
c->setPlotArea(50, 45, 320, 200, 0xffffff)->setGridColor(0xc0c0c0, 0xc0c0c0);
// Add a legend box at (370, 45) using vertical layout and 8 points Arial Bold
// font.
LegendBox *legendBox = c->addLegend(370, 45, true, "arialbd.ttf", 8);
// Set the legend box background and border to transparent
legendBox->setBackground(Chart::Transparent, Chart::Transparent);
// Set the legend box icon size to 16 x 32 pixels to match with custom icon size
legendBox->setKeySize(16, 32);
// Add a title to the chart using 14 points Times Bold Itatic font and white font
// color, and 0x804020 as the background color
c->addTitle("Quarterly Product Sales", "timesbi.ttf", 14, 0xffffff
)->setBackground(0x804020);
// Set the labels on the x axis.
c->xAxis()->setLabels(DoubleArray(labels, sizeof(labels)/sizeof(labels[0])));
// Set multi-style axis label formatting. Start of year labels are displayed as
// yyyy. For other labels, just show minor tick.
c->xAxis()->setMultiFormat(Chart::StartOfYearFilter(), "{value|yyyy}",
Chart::AllPassFilter(), "-");
// Add a percentage area layer to the chart
AreaLayer *layer = c->addAreaLayer(Chart::Percentage);
// Add the three data sets to the area layer, using icons images with labels as
// data set names
layer->addDataSet(DoubleArray(data0, sizeof(data0)/sizeof(data0[0])), 0x40ddaa77,
"<*block,valign=absmiddle*><*img=service.png*> Service<*/*>");
layer->addDataSet(DoubleArray(data1, sizeof(data1)/sizeof(data1[0])), 0x40aadd77,
"<*block,valign=absmiddle*><*img=software.png*> Software<*/*>");
layer->addDataSet(DoubleArray(data2, sizeof(data2)/sizeof(data2[0])), 0x40aa77dd,
"<*block,valign=absmiddle*><*img=computer.png*> Hardware<*/*>");
// For a vertical stacked chart with positive data only, the last data set is
// always on top. However, in a vertical legend box, the last data set is at the
// bottom. This can be reversed by using the setLegend method.
layer->setLegend(Chart::ReverseLegend);
// Output the chart
c->makeChart("percentarea.png");
//free up resources
delete c;
return 0;
}
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[])
{
// The data for the 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 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 500 x 300 pixels, with a pale yellow
// (0xffffc0) background, a black border, and 1 pixel 3D border effect
XYChart *c = new XYChart(500, 300, 0xffffc0, 0x000000, 1);
// Set the plotarea at (55, 50) and of size 420 x 205 pixels, with white
// background. Turn on both horizontal and vertical grid lines with light grey
// color (0xc0c0c0)
c->setPlotArea(55, 50, 420, 205, 0xffffff)->setGridColor(0xc0c0c0, 0xc0c0c0);
// Add a legend box at (55, 25) (top of the chart) with horizontal layout. Use 8
// pts Arial font. Set the background and border color to Transparent.
LegendBox *legendBox = c->addLegend(55, 25, false, "", 8);
legendBox->setBackground(Chart::Transparent);
// Add keys to the legend box to explain the color zones
legendBox->addKey("Normal Zone", 0x8033ff33);
legendBox->addKey("Alert Zone", 0x80ff3333);
// Add a title box to the chart using 13 pts Arial Bold Italic font. The title is
// in CDML and includes embedded images for highlight. The text is white
// (0xffffff) on a black background, with a 1 pixel 3D border.
c->addTitle(
"<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Y Zone Color "
"Demo <*img=star.png*><*img=star.png*><*/*>", "arialbi.ttf", 13, 0xffffff
)->setBackground(0x000000, -1, 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. The area is using a y zone color, where the
// color is semi-transparent green below 60, and semi-transparent red above 60.
c->addAreaLayer(DoubleArray(data, sizeof(data)/sizeof(data[0])), c->yZoneColor(
60, 0x8033ff33, 0x80ff3333));
// Add a custom CDML text at the bottom right of the plot area as the logo
c->addText(475, 255,
"<*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("yzonecolor.png");
//free up resources
delete c;
return 0;
}
int main(int argc, char *argv[])
{
// The data for the chart
double data0[] = {42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56,
56, 60, 70, 76, 63, 67, 75, 64, 51};
double data1[] = {50, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67,
58, 59, 73, 77, 84, 82, 80, 84, 98};
// The labels for the bottom x axis. Note the "-" means a minor tick.
const char *labels0[] = {"0\nJun 4", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22",
"23", "0\nJun 5"};
// The labels for the top x axis. Note that "-" means a minor tick.
const char *labels1[] = {"Jun 3\n12", "13", "14", "15", "16", "17", "18", "19",
"20", "21", "22", "23", "Jun 4\n0", "1", "2", "3", "4", "5", "6", "7", "8",
"9", "10", "11", "12"};
// Create a XYChart object of size 310 x 310 pixels
XYChart *c = new XYChart(310, 310);
// Set the plotarea at (50, 50) and of size 200 x 200 pixels
c->setPlotArea(50, 50, 200, 200);
// Add a title to the primary (left) y axis
c->yAxis()->setTitle("US Dollars");
// Set the tick length to -4 pixels (-ve means ticks inside the plot area)
c->yAxis()->setTickLength(-4);
// Add a title to the secondary (right) y axis
c->yAxis2()->setTitle("HK Dollars (1 USD = 7.8 HKD)");
// Set the tick length to -4 pixels (-ve means ticks inside the plot area)
c->yAxis2()->setTickLength(-4);
// Synchronize the y-axis such that y2 = 7.8 x y1
c->syncYAxis(7.8);
// Add a title to the bottom x axis
c->xAxis()->setTitle("Hong Kong Time");
// Set the labels on the x axis.
c->xAxis()->setLabels(StringArray(labels0, sizeof(labels0)/sizeof(labels0[0])));
// Display 1 out of 3 labels on the x-axis. Show minor ticks for remaining
// labels.
c->xAxis()->setLabelStep(3, 1);
// Set the major tick length to -4 pixels and minor tick length to -2 pixels (-ve
// means ticks inside the plot area)
c->xAxis()->setTickLength(-4, -2);
// Set the distance between the axis labels and the axis to 6 pixels
c->xAxis()->setLabelGap(6);
// Add a title to the top x-axis
c->xAxis2()->setTitle("New York Time");
// Set the labels on the x axis.
c->xAxis2()->setLabels(StringArray(labels1, sizeof(labels1)/sizeof(labels1[0])));
// Display 1 out of 3 labels on the x-axis. Show minor ticks for remaining
// labels.
c->xAxis2()->setLabelStep(3, 1);
// Set the major tick length to -4 pixels and minor tick length to -2 pixels (-ve
// means ticks inside the plot area)
c->xAxis2()->setTickLength(-4, -2);
// Set the distance between the axis labels and the axis to 6 pixels
c->xAxis2()->setLabelGap(6);
// Add a line layer to the chart with a line width of 2 pixels
c->addLineLayer(DoubleArray(data0, sizeof(data0)/sizeof(data0[0])), -1,
"Red Transactions")->setLineWidth(2);
// Add an area layer to the chart with no area boundary line
c->addAreaLayer(DoubleArray(data1, sizeof(data1)/sizeof(data1[0])), -1,
"Green Transactions")->setLineWidth(0);
// output the chart
c->makeChart("dualxaxis.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;
}
