Color Horizontal Bar Meters

perldemo\colorhbarmeter.pl
#!/usr/bin/perl

# 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 = 75.35;

    # The background, border and bar colors of the meters
    my $bgColor = [0xbbddff, 0xccffcc, 0xffddff, 0xffffaa, 0xffdddd, 0xeeeeee];
    my $borderColor = [0x000088, 0x006600, 0x880088, 0xee6600, 0x880000, 0x666666];
    my $barColor = [0x0088ff, 0x00cc00, 0x8833dd, 0xff8800, 0xee3333, 0x888888];

    # Create a LinearMeter object of size 260 x 80 pixels with a 3-pixel thick rounded frame
    my $m = new LinearMeter(260, 80, $bgColor->[$chartIndex], $borderColor->[$chartIndex]);
    $m->setRoundedFrame($perlchartdir::Transparent);
    $m->setThickFrame(3);

    # Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale
    # labels are located on the top (implies horizontal meter)
    $m->setMeter(18, 24, 222, 20, $perlchartdir::Top);

    # Set meter scale from 0 - 100, with a tick every 10 units
    $m->setScale(0, 100, 10);

    if ($chartIndex % 4 == 0) {
        # Add a 5-pixel thick smooth color scale at y = 48 (below the meter scale)
        my $smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000
            ];
        $m->addColorScale($smoothColorScale, 48, 5);
    } elsif ($chartIndex % 4 == 1) {
        # Add a 5-pixel thick step color scale at y = 48 (below the meter scale)
        my $stepColorScale = [0, 0x00cc00, 50, 0xffdd00, 80, 0xff3333, 100];
        $m->addColorScale($stepColorScale, 48, 5);
    } elsif ($chartIndex % 4 == 2) {
        # Add a 5-pixel thick high/low color scale at y = 48 (below the meter scale)
        my $highLowColorScale = [0, 0x0000ff, 40, $perlchartdir::Transparent, 60,
            $perlchartdir::Transparent, 100, 0xff0000];
        $m->addColorScale($highLowColorScale, 48, 5);
    } else {
        # Add a 5-pixel thick high only color scale at y = 48 (below the meter scale)
        my $highColorScale = [70, $perlchartdir::Transparent, 100, 0xff0000];
        $m->addColorScale($highColorScale, 48, 0, 48, 8);
    }

    # Add a bar from 0 to value with glass effect and 4 pixel rounded corners
    $m->addBar(0, $value, $barColor->[$chartIndex], perlchartdir::glassEffect(
        $perlchartdir::NormalGlare, $perlchartdir::Top), 4);

    # Add a label right aligned to (243, 65) using 8pt Arial Bold font
    $m->addText(243, 65, "Temperature C", "Arial Bold", 8, $perlchartdir::TextColor,
        $perlchartdir::Right);

    # Add a text box left aligned to (18, 65). Display the value using white (0xffffff) 8pt Arial
    # Bold font on a black (0x000000) background with depressed rounded border.
    my $t = $m->addText(18, 65, $m->formatValue($value, "2"), "Arial", 8, 0xffffff,
        $perlchartdir::Left);
    $t->setBackground(0x000000, 0x000000, -1);
    $t->setRoundedCorners(3);

    # Output the chart
    $m->makeChart("colorhbarmeter$chartIndex.png");
}

createChart(0);
createChart(1);
createChart(2);
createChart(3);
createChart(4);
createChart(5);