#!/usr/bin/perl
use perlchartdir;
#The age groups
my $labels = ["0 - 4", "5 - 9", "10 - 14", "15 - 19", "20 - 24", "24 - 29",
"30 - 34", "35 - 39", "40 - 44", "44 - 49", "50 - 54", "55 - 59", "60 - 64",
"65 - 69", "70 - 74", "75 - 79", "80+"];
#The male population (in thousands)
my $male = [215, 238, 225, 236, 235, 260, 286, 340, 363, 305, 259, 164, 135,
127, 102, 68, 66];
#The female population (in thousands)
my $female = [194, 203, 201, 220, 228, 271, 339, 401, 384, 304, 236, 137, 116,
122, 112, 85, 110];
#=============================================================
# Draw the right bar chart
#=============================================================
#Create a XYChart object of size 320 x 300 pixels
my $c = new XYChart(320, 300);
#Set the plotarea at (50, 0) and of size 250 x 255 pixels. Use pink (0xffdddd)
#as the background.
$c->setPlotArea(50, 0, 250, 255, 0xffdddd);
#Add a custom text label at the top right corner of the right bar chart
$c->addText(300, 0, "Female", "timesbi.ttf", 12, 0xa07070)->setAlignment(
$perlchartdir::TopRight);
#Add the pink (0xf0c0c0) bar chart layer using the female data
my $femaleLayer = $c->addBarLayer($female, 0xf0c0c0);
#Swap the axis so that the bars are drawn horizontally
$c->swapXY(1);
#Set the bar to touch each others
$femaleLayer->setBarGap($perlchartdir::TouchBar);
#Set the border style of the bars to 1 pixel 3D border
$femaleLayer->setBorderColor(-1, 1);
#Add a Transparent line layer to the chart using the male data. As it is
#Transparent, only the female bar chart can be seen. We need to put both male
#and female data in both left and right charts, because we want auto-scaling to
#produce the same scale for both chart.
$c->addLineLayer($male, $perlchartdir::Transparent);
#Set the y axis label font to Arial Bold
$c->yAxis()->setLabelStyle("arialbd.ttf");
#Set the labels between the two bar charts, which can be considered as the
#x-axis labels for the right chart
my $tb = $c->xAxis()->setLabels($labels);
#Use a fix width of 50 for the labels (height = automatic) with center alignment
$tb->setSize(50, 0);
$tb->setAlignment($perlchartdir::Center);
#Set the label font to Arial Bold
$tb->setFontStyle("arialbd.ttf");
#Disable ticks on the x-axis by setting the tick length to 0
$c->xAxis()->setTickLength(0);
#=============================================================
# Draw the left bar chart
#=============================================================
#Create a XYChart object of size 280 x 300 pixels with a transparent background.
my $c2 = new XYChart(280, 300, $perlchartdir::Transparent);
#Set the plotarea at (20, 0) and of size 250 x 255 pixels. Use pale blue
#(0xddddff) as the background.
$c2->setPlotArea(20, 0, 250, 255, 0xddddff);
#Add a custom text label at the top left corner of the left bar chart
$c2->addText(20, 0, "Male", "timesbi.ttf", 12, 0x7070a0);
#Add the pale blue (0xaaaaff) bar chart layer using the male data
my $maleLayer = $c2->addBarLayer($male, 0xaaaaff);
#Swap the axis so that the bars are drawn horizontally
$c2->swapXY(1);
#Reverse the direction of the y-axis so it runs from right to left
$c2->yAxis()->setReverse();
#Set the bar to touch each others
$maleLayer->setBarGap($perlchartdir::TouchBar);
#Set the border style of the bars to 1 pixel 3D border
$maleLayer->setBorderColor(-1, 1);
#Add a Transparent line layer to the chart using the female data. As it is
#Transparent, only the male bar chart can be seen. We need to put both male and
#female data in both left and right charts, because we want auto-scaling to
#produce the same scale for both chart.
$c->addLineLayer($female, $perlchartdir::Transparent);
#Set the y axis label font to Arial Bold
$c2->yAxis()->setLabelStyle("arialbd.ttf");
#=============================================================
# Use a MultiChart to contain both bar charts
#=============================================================
#Create a MultiChart object of size 590 x 320 pixels.
my $m = new MultiChart(590, 320);
#Add a title to the chart using Arial Bold Italic font
$m->addTitle("Demographics Hong Kong Year 2002", "arialbi.ttf");
#Add another title at the bottom using Arial Bold Italic font
$m->addTitle2($perlchartdir::Bottom, "Population (in thousands)", "arialbi.ttf",
10);
#Put the right chatr at (270, 25)
$m->addChart(270, 25, $c);
#Put the left char at (0, 25)
$m->addChart(0, 25, $c2);
#output the chart
$m->makeChart("dualhbar.png")
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