Multi-Color Gantt Chart

[File: phpdemo/colorgantt.php]
<?php
require_once("../lib/phpchartdir.php");

# The tasks for the gantt chart
$labels = array("Market Research", "Define Specifications", "Overall Archiecture",
    "Project Planning", "Detail Design", "Software Development", "Test Plan",
    "Testing and QA", "User Documentation");

# The task index, start date, end date and color for each bar
$taskNo = array(0, 0, 1, 2, 3, 4, 5, 6, 6, 7, 8, 8);
$startDate = array(chartTime(2004, 8, 16), chartTime(2004, 10, 4), chartTime(2004, 8,
    30), chartTime(2004, 9, 13), chartTime(2004, 9, 20), chartTime(2004, 9, 27),
    chartTime(2004, 10, 4), chartTime(2004, 10, 4), chartTime(2004, 10, 25),
    chartTime(2004, 11, 1), chartTime(2004, 10, 18), chartTime(2004, 11, 8));
$endDate = array(chartTime(2004, 8, 30), chartTime(2004, 10, 18), chartTime(2004, 9,
    13), chartTime(2004, 9, 27), chartTime(2004, 10, 4), chartTime(2004, 10, 11),
    chartTime(2004, 11, 8), chartTime(2004, 10, 18), chartTime(2004, 11, 8),
    chartTime(2004, 11, 22), chartTime(2004, 11, 1), chartTime(2004, 11, 22));
$colors = array(0x00cc00, 0x00cc00, 0x00cc00, 0x0000cc, 0x0000cc, 0xcc0000, 0xcc0000,
    0x0000cc, 0xcc0000, 0xcc0000, 0x00cc00, 0xcc0000);

# Create a XYChart object of size 620 x 325 pixels. Set background color to light red
# (0xffcccc), with 1 pixel 3D border effect.
$c = new XYChart(620, 325, 0xffcccc, 0x000000, 1);

# Add a title to the chart using 15 points Times Bold Itatic font, with white
# (ffffff) text on a dark red (800000) background
$textBoxObj = $c->addTitle("Mutli-Color Gantt Chart Demo", "timesbi.ttf", 15,
    0xffffff);
$textBoxObj->setBackground(0x800000);

# Set the plotarea at (140, 55) and of size 460 x 200 pixels. Use alternative
# white/grey background. Enable both horizontal and vertical grids by setting their
# colors to grey (c0c0c0). Set vertical major grid (represents month boundaries) 2
# pixels in width
$plotAreaObj = $c->setPlotArea(140, 55, 460, 200, 0xffffff, 0xeeeeee, LineColor,
    0xc0c0c0, 0xc0c0c0);
$plotAreaObj->setGridWidth(2, 1, 1, 1);

# swap the x and y axes to create a horziontal box-whisker chart
$c->swapXY();

# Set the y-axis scale to be date scale from Aug 16, 2004 to Nov 22, 2004, with ticks
# every 7 days (1 week)
$c->yAxis->setDateScale(chartTime(2004, 8, 16), chartTime(2004, 11, 22), 86400 * 7);

# Set multi-style axis label formatting. Month labels are in Arial Bold font in "mmm
# d" format. Weekly labels just show the day of month and use minor tick (by using
# '-' as first character of format string).
$c->yAxis->setMultiFormat(StartOfMonthFilter(), "<*font=arialbd.ttf*>{value|mmm d}",
    StartOfDayFilter(), "-{value|d}");

# Set the y-axis to shown on the top (right + swapXY = top)
$c->setYAxisOnRight();

# Set the labels on the x axis
$c->xAxis->setLabels($labels);

# Reverse the x-axis scale so that it points downwards.
$c->xAxis->setReverse();

# Set the horizontal ticks and grid lines to be between the bars
$c->xAxis->setTickOffset(0.5);

# Add some symbols to the chart to represent milestones. The symbols are added using
# scatter layers. We need to specify the task index, date, name, symbol shape, size
# and color.
$c->addScatterLayer(array(1), array(chartTime(2004, 9, 13)), "Milestone 1",
    Cross2Shape(), 13, 0xffff00);
$c->addScatterLayer(array(3), array(chartTime(2004, 10, 4)), "Milestone 2",
    StarShape(5), 15, 0xff00ff);
$c->addScatterLayer(array(5), array(chartTime(2004, 11, 8)), "Milestone 3",
    TriangleSymbol, 13, 0xff9933);

# Add a multi-color box-whisker layer to represent the gantt bars
$layer = $c->addBoxWhiskerLayer2($startDate, $endDate, null, null, null, $colors);
$layer->setXData($taskNo);
$layer->setBorderColor(SameAsMainColor);

# Divide the plot area height ( = 200 in this chart) by the number of tasks to get
# the height of each slot. Use 80% of that as the bar height.
$layer->setDataWidth((int)(200 * 4 / 5 / count($labels)));

# Add a legend box at (140, 265) - bottom of the plot area. Use 8 pts Arial Bold as
# the font with auto-grid layout. Set the width to the same width as the plot area.
# Set the backgorund to grey (dddddd).
$legendBox = $c->addLegend2(140, 265, AutoGrid, "arialbd.ttf", 8);
$legendBox->setWidth(461);
$legendBox->setBackground(0xdddddd);

# The keys for the scatter layers (milestone symbols) will automatically be added to
# the legend box. We just need to add keys to show the meanings of the bar colors.
$legendBox->addKey("Market Team", 0x00cc00);
$legendBox->addKey("Planning Team", 0x0000cc);
$legendBox->addKey("Development Team", 0xcc0000);

# Output the chart
header("Content-type: image/png");
print($c->makeChart2(PNG));
?>