void createChart(int chartIndex, const char *filename)
{
// The value to display on the meter
double value = 66.77;
// Create a LinearMeter object of size 70 x 260 pixels with black background and rounded corners
LinearMeter *m = new LinearMeter(70, 260, 0x000000);
m->setRoundedFrame(Chart::Transparent);
// Set the default text and line colors to white (0xffffff)
m->setColor(Chart::TextColor, 0xffffff);
m->setColor(Chart::LineColor, 0xffffff);
// Set the scale region top-left corner at (36, 30), with size of 20 x 196 pixels. The scale
// labels are located on the left (default - implies vertical meter).
m->setMeter(36, 30, 20, 196);
// Set meter scale from 0 - 100, with a tick every 10 units
m->setScale(0, 100, 10);
// Add the chart title at the top center
TextBox *title = m->addText(m->getWidth() / 2, 5, "Temp C", "arialbd.ttf", 8, Chart::TextColor,
Chart::TopCenter);
// Move the scale labels 8 pixels from the meter scale to make room for the color scale
m->setLabelPos(false, 8);
// Demostrate different types of color scales
double smoothColorScale[] = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100,
0xff0000};
double stepColorScale[] = {0, 0x00dd00, 50, 0xffff00, 80, 0xff0000, 100};
double highLowColorScale[] = {0, 0x0000ff, 40, Chart::Transparent, 60, Chart::Transparent, 100,
0xff0000};
double highColorScale[] = {70, Chart::Transparent, 100, 0xff0000};
if (chartIndex == 0) {
// Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
m->addBar(0, value, 0x0088ff, Chart::glassEffect(Chart::NormalGlare, Chart::Left), 4);
// Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
smoothColorScale[0]))), 29, 4);
} else if (chartIndex == 1) {
// Add a yellow (0xCC9922) bar from 0 to value with bar lighting effect
m->addBar(0, value, 0xcc9922, Chart::barLighting());
// Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
smoothColorScale[0]))), 29, 4);
// Set the title style to black text on a yellow (0xcc9922) background with rounded corners
title->setFontColor(0x000000);
title->setBackground(0xcc9922);
title->setRoundedCorners(2);
} else if (chartIndex == 2) {
// Add a grey (0xaaaaaa) bar from 0 to value with bar lighting effect
m->addBar(0, value, 0xaaaaaa, Chart::barLighting());
// Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
m->addColorScale(DoubleArray(highLowColorScale, (int)(sizeof(highLowColorScale) / sizeof(
highLowColorScale[0]))), 29, 4);
} else if (chartIndex == 3) {
// Add a brown (0xbb6622) bar from 0 to value with cylinder lighting effect
m->addBar(0, value, 0xbb6622, Chart::cylinderEffect());
// Add a 4 pixel thick brown (0xbb6622) frame
m->setThickFrame(4, 0xbb6622);
// Add a high only color scale at x = 29 (left of meter scale)
m->addColorScale(DoubleArray(highColorScale, (int)(sizeof(highColorScale) / sizeof(
highColorScale[0]))), 29, 4);
} else if (chartIndex == 4) {
// Add a purple (0x7755ee) bar from 0 to value
m->addBar(0, value, 0x7755ee);
// Add a 4 pixel thick purple (0x880088) frame
m->setThickFrame(4, 0x880088);
// Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
m->addColorScale(DoubleArray(highLowColorScale, (int)(sizeof(highLowColorScale) / sizeof(
highLowColorScale[0]))), 29, 4);
} else {
// Add a green (0x00bb00) bar from 0 to value with soft lighting effect and 4 pixel rounded
// corners
m->addBar(0, value, 0x00bb00, Chart::softLighting(), 4);
// Add a 4-pixel step color scale at x = 29 (left of meter scale)
m->addColorScale(DoubleArray(stepColorScale, (int)(sizeof(stepColorScale) / sizeof(
stepColorScale[0]))), 29, 4);
}
// Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold
// font on a black (0x000000) background with depressed grey (0x333333) rounded border.
TextBox *t = m->addText(m->getWidth() / 2, m->getHeight() - 7, m->formatValue(value, "2"),
"arialbd.ttf", 8, 0xffffff, Chart::BottomCenter);
t->setBackground(0x000000, 0x333333, -1);
t->setRoundedCorners(3);
// Output the chart
m->makeChart(filename);
//free up resources
delete m;
}
void createChart(int chartIndex, const char *filename)
{
// The value to display on the meter
double value = 74.25;
// Create a LinearMeter object of size 70 x 260 pixels with very light grey (0xeeeeee)
// backgruond and a grey (0xbbbbbb) 3-pixel thick rounded frame
LinearMeter *m = new LinearMeter(70, 260, 0xeeeeee, 0xbbbbbb);
m->setRoundedFrame(Chart::Transparent);
m->setThickFrame(3);
// Set the scale region top-left corner at (28, 33), with size of 20 x 194 pixels. The scale
// labels are located on the left (default - implies vertical meter).
m->setMeter(28, 33, 20, 194);
// Set meter scale from 0 - 100, with a tick every 10 units
m->setScale(0, 100, 10);
// Demostrate different types of color scales
double smoothColorScale[] = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100,
0xff0000};
double stepColorScale[] = {0, 0x00dd00, 50, 0xffff00, 80, 0xff0000, 100};
double highColorScale[] = {70, Chart::Transparent, 100, 0xff0000};
double lowColorScale[] = {0, 0x0000ff, 30, Chart::Transparent};
if (chartIndex == 0) {
// Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
m->addBar(0, value, 0x0088ff, Chart::glassEffect(Chart::NormalGlare, Chart::Left), 4);
// Add a 6-pixel thick smooth color scale at x = 53 (right of meter scale)
m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
smoothColorScale[0]))), 53, 6);
} else if (chartIndex == 1) {
// Add a green (0x00cc00) bar from 0 to value with bar lighting effect and 4 pixel rounded
// corners
m->addBar(0, value, 0x00cc00, Chart::barLighting(), 4);
// Add a high only color scale at x = 52 (right of meter scale) with thickness varying from
// 0 to 8
m->addColorScale(DoubleArray(highColorScale, (int)(sizeof(highColorScale) / sizeof(
highColorScale[0]))), 52, 0, 52, 8);
// Add a low only color scale at x = 52 (right of meter scale) with thickness varying from 8
// to 0
m->addColorScale(DoubleArray(lowColorScale, (int)(sizeof(lowColorScale) / sizeof(
lowColorScale[0]))), 52, 8, 52, 0);
} else if (chartIndex == 2) {
// Add a purple (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
m->addBar(0, value, 0x8833dd, Chart::glassEffect(Chart::NormalGlare, Chart::Left), 4);
// Add a high only color scale at x = 52 (right of meter scale) with thickness varying from
// 0 to 8
m->addColorScale(DoubleArray(highColorScale, (int)(sizeof(highColorScale) / sizeof(
highColorScale[0]))), 52, 0, 52, 8);
} else if (chartIndex == 3) {
// Add a orange (0xff8800) bar from 0 to value with cylinder lighting effect
m->addBar(0, value, 0xff8800, Chart::cylinderEffect());
// Add a high only color scale at x = 53 (right of meter scale)
m->addColorScale(DoubleArray(highColorScale, (int)(sizeof(highColorScale) / sizeof(
highColorScale[0]))), 53, 6);
} else if (chartIndex == 4) {
// Add a red (0xee3333) bar from 0 to value with glass effect and 4 pixel rounded corners
m->addBar(0, value, 0xee3333, Chart::glassEffect(Chart::NormalGlare, Chart::Left), 4);
// Add a step color scale at x = 53 (right of meter scale)
m->addColorScale(DoubleArray(stepColorScale, (int)(sizeof(stepColorScale) / sizeof(
stepColorScale[0]))), 53, 6);
} else {
// Add a grey (0xaaaaaa) bar from 0 to value
m->addBar(0, value, 0xaaaaaa);
// Add a smooth color scale at x = 52 (right of meter scale) with thickness varying from 0
// to 8
m->addColorScale(DoubleArray(smoothColorScale, (int)(sizeof(smoothColorScale) / sizeof(
smoothColorScale[0]))), 52, 0, 52, 8);
}
// Add a title using 8pt Arial Bold font with grey (0xbbbbbb) background
m->addTitle("Temp C", "arialbd.ttf", 8, Chart::TextColor)->setBackground(0xbbbbbb);
// Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold
// font on a black (0x000000) background with rounded border.
TextBox *t = m->addText(m->getWidth() / 2, m->getHeight() - 8, m->formatValue(value, "2"),
"arialbd.ttf", 8, 0xffffff, Chart::Bottom);
t->setBackground(0x000000);
t->setRoundedCorners(3);
t->setMargin(5, 5, 2, 1);
// Output the chart
m->makeChart(filename);
//free up resources
delete m;
}