#!/usr/bin/perl
# In the sample code, the ChartDirector for Perl module is assumed to be in "../lib"
use File::Basename;
use lib (dirname($0)."/../lib") =~ /(.*)/;
use perlchartdir;
sub createChart
{
my $chartIndex = shift;
# The value to display on the meter
my $value = 72.3;
# Create an AngularMeter object of size 250 x 250 pixels with transparent background
my $m = new AngularMeter(250, 250, $perlchartdir::Transparent);
# Set the default text and line colors to white (0xffffff)
$m->setColor($perlchartdir::TextColor, 0xffffff);
$m->setColor($perlchartdir::LineColor, 0xffffff);
# Demonstration two different meter scale angles
if ($chartIndex % 2 == 0) {
# Center at (125, 125), scale radius = 111 pixels, scale angle -140 to +140 degrees
$m->setMeter(125, 125, 111, -140, 140);
} else {
# Center at (125, 125), scale radius = 111 pixels, scale angle -180 to +90 degrees
$m->setMeter(125, 125, 111, -180, 90);
}
# Add a black (0x000000) circle with radius 123 pixels as background
$m->addRing(0, 123, 0x000000);
# Gradient color for the border to make it silver-like
my $ringGradient = [1, 0x7f7f7f, 0.5, 0xd6d6d6, 0, 0xffffff, -0.5, 0xd6d6d6, -1, 0x7f7f7f];
# Add a ring between radii 116 and 122 pixels using the silver gradient as border
$m->addRing(116, 122, $m->relativeLinearGradient($ringGradient, 45, 122));
# Meter scale is 0 - 100, with major/minor/micro ticks every 10/5/1 units
$m->setScale(0, 100, 10, 5, 1);
# Set the scale label style to 15pt Arial Italic. Set the major/minor/micro tick lengths to
# 12/9/6 pixels pointing inwards, and their widths to 2/1/1 pixels.
$m->setLabelStyle("ariali.ttf", 15);
$m->setTickLength(-12, -9, -6);
$m->setLineWidth(0, 2, 1, 1);
# Demostrate different types of color scales and glare effects and putting them at different
# positions.
my $smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000];
my $stepColorScale = [0, 0x00aa00, 60, 0xddaa00, 80, 0xcc0000, 100];
my $highLowColorScale = [0, 0x00ff00, 70, $perlchartdir::Transparent, 100, 0xff0000];
if ($chartIndex == 0) {
# Add the smooth color scale at the default position
$m->addColorScale($smoothColorScale);
# Add glare up to radius 116 (= region inside border)
$m->addGlare(116);
} elsif ($chartIndex == 1) {
# Add the smooth color scale starting at radius 62 with zero width and ending at radius 40
# with 22 pixels outer width
$m->addColorScale($smoothColorScale, 62, 0, 40, 22);
# Add glare up to radius 116 (= region inside border), concave and spanning 190 degrees
$m->addGlare(116, -190);
} elsif ($chartIndex == 2) {
# Add the smooth color scale starting at radius 111 with zero width and ending at radius 111
# with 12 pixels inner width
$m->addColorScale($smoothColorScale, 111, 0, 111, -12);
# Add glare up to radius 116 (= region inside border), concave and spanning 190 degrees and
# rotated by 45 degrees
$m->addGlare(116, -190, 45);
} elsif ($chartIndex == 3) {
# Add the high/low color scale at the default position
$m->addColorScale($highLowColorScale);
} elsif ($chartIndex == 4) {
# Add the smooth color scale at radius 44 with 16 pixels outer width
$m->addColorScale($smoothColorScale, 44, 16);
# Add glare up to radius 116 (= region inside border), concave and spanning 190 degrees and
# rotated by -45 degrees
$m->addGlare(116, -190, -45);
} else {
# Add the step color scale at the default position
$m->addColorScale($stepColorScale);
}
# Add a text label centered at (125, 175) with 15pt Arial Italic font
$m->addText(125, 175, "CPU", "ariali.ttf", 15, $perlchartdir::TextColor, $perlchartdir::Center);
# Add a readout to some of the charts as demonstration
if ($chartIndex == 0 || $chartIndex == 2) {
# Put the value label center aligned at (125, 232), using black (0x000000) 14pt Arial font
# on a light blue (0x99ccff) background. Set box width to 50 pixels with 5 pixels rounded
# corners.
my $t = $m->addText(125, 232, $m->formatValue($value,
"<*block,width=50,halign=center*>{value|1}"), "arial.ttf", 14, 0x000000,
$perlchartdir::BottomCenter);
$t->setBackground(0x99ccff);
$t->setRoundedCorners(5);
}
# Add a red (0xff0000) pointer at the specified value
$m->addPointer2($value, 0xff0000);
# Output the chart
$m->makeChart("blackroundmeter$chartIndex.png")
}
createChart(0);
createChart(1);
createChart(2);
createChart(3);
createChart(4);
createChart(5); |
