White Vertical Bar Meters

perldemo\whitevbarmeter.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 = 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
    my $m = new LinearMeter(70, 260, 0xeeeeee, 0xbbbbbb);
    $m->setRoundedFrame($perlchartdir::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
    my $smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000];
    my $stepColorScale = [0, 0x00dd00, 50, 0xffff00, 80, 0xff0000, 100];
    my $highColorScale = [70, $perlchartdir::Transparent, 100, 0xff0000];
    my $lowColorScale = [0, 0x0000ff, 30, $perlchartdir::Transparent];

    if ($chartIndex == 0) {
        # Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
        $m->addBar(0, $value, 0x0088ff, perlchartdir::glassEffect($perlchartdir::NormalGlare,
            $perlchartdir::Left), 4);
        # Add a 6-pixel thick smooth color scale at x = 53 (right of meter scale)
        $m->addColorScale($smoothColorScale, 53, 6);
    } elsif ($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, perlchartdir::barLighting(), 4);
        # Add a high only color scale at x = 52 (right of meter scale) with thickness varying from 0
        # to 8
        $m->addColorScale($highColorScale, 52, 0, 52, 8);
        # Add a low only color scale at x = 52 (right of meter scale) with thickness varying from 8
        # to 0
        $m->addColorScale($lowColorScale, 52, 8, 52, 0);
    } elsif ($chartIndex == 2) {
        # Add a purple (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
        $m->addBar(0, $value, 0x8833dd, perlchartdir::glassEffect($perlchartdir::NormalGlare,
            $perlchartdir::Left), 4);
        # Add a high only color scale at x = 52 (right of meter scale) with thickness varying from 0
        # to 8
        $m->addColorScale($highColorScale, 52, 0, 52, 8);
    } elsif ($chartIndex == 3) {
         # Add a orange (0xff8800) bar from 0 to value with cylinder lighting effect
        $m->addBar(0, $value, 0xff8800, perlchartdir::cylinderEffect());
        # Add a high only color scale at x = 53 (right of meter scale)
        $m->addColorScale($highColorScale, 53, 6);
    } elsif ($chartIndex == 4) {
        # Add a red (0xee3333) bar from 0 to value with glass effect and 4 pixel rounded corners
        $m->addBar(0, $value, 0xee3333, perlchartdir::glassEffect($perlchartdir::NormalGlare,
            $perlchartdir::Left), 4);
        # Add a step color scale at x = 53 (right of meter scale)
        $m->addColorScale($stepColorScale, 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
        $m->addColorScale($smoothColorScale, 52, 0, 52, 8);
    }

    # Add a title using 8pt Arial Bold font with grey (0xbbbbbb) background
    $m->addTitle("Temp C", "Arial Bold", 8, $perlchartdir::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.
    my $t = $m->addText($m->getWidth() / 2, $m->getHeight() - 8, $m->formatValue($value, "2"),
        "Arial Bold", 8, 0xffffff, $perlchartdir::Bottom);
    $t->setBackground(0x000000);
    $t->setRoundedCorners(3);
    $t->setMargin2(5, 5, 2, 1);

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

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