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<?php
///////////////////////////////////////////////////////////
//PHPGraphLib - PHP Graphing Library v2.31 - Stacked Bar Extension
//Author: Elliott Brueggeman
//PHP v4.04 + compatible
//Please visit www.ebrueggeman.com for usage policy
//and documentation + examples
///////////////////////////////////////////////////////////
class PHPGraphLibStacked extends PHPGraphLib {
function PHPGraphLibStacked($width = '', $height = '') {
PHPGraphLib::PHPGraphLib($width,$height);
}
function generateBars() {
$this->finalizeColors();
$barCount = 0;
$adjustment = 0;
$last_y1 = array();
$last_y2 = array();
if ($this->bool_user_data_range && $this->data_min >= 0) {
$adjustment = $this->data_min * $this->unit_scale;
}
$this->data_array = array_reverse($this->data_array);
foreach ($this->data_array as $data_set_num => $data_set) {
$lineX2 = NULL;
$xStart = $this->y_axis_x1 + ($this->space_width / 2);
foreach ($data_set as $key => $item) {
$hideBarOutline = false;
$x1 = round($xStart);
$x2 = round($xStart + $this->bar_width);
if ($data_set_num > 0) {
//find last set valid value for this dataset incase prior values were not set
$found = false;
$i = 1;
//default last to base in case none are found
$last = $this->x_axis_y1;
while ($found == false && ($data_set_num - $i) >= 0) {
if (isset($last_y1[$data_set_num - $i][$key])) {
$last = $last_y1[$data_set_num - $i][$key];
$found = true;
}
$i++;
}
$y2 = round($last);
$y1 = round(($y2 - ($item * $this->unit_scale) + $adjustment));
}
else {
$y2 = round($this->x_axis_y1);
$y1 = round((($this->x_axis_y1 - ($item * $this->unit_scale) + $adjustment)));
}
//if we are using a user specified data range, need to limit what's displayed
if ($this->bool_user_data_range) {
if ($item <= $this->data_range_min) {
//don't display, we are out of our allowed display range!
$y1 = $y2;
$hideBarOutline = true;
}
else if ($item >= $this->data_range_max) {
//display, but cut off display above range max
$y1 = $this->x_axis_y1 - ($this->true_displayed_max_value * $this->unit_scale) + $adjustment;
}
}
//draw bar and outline if nonzero
if ($this->bool_bars && $item != 0) {
if ($this->bool_gradient) {
$this->drawGradientBar($x1, $y1, $x2, $y2, $this->multi_gradient_colors_1[$data_set_num], $this->multi_gradient_colors_2[$data_set_num], $data_set_num);
}
else {
imagefilledrectangle($this->image, $x1, $y1,$x2, $y2, $this->multi_bar_colors[$data_set_num]);
}
//draw bar outline
if ($this->bool_bar_outline && !$hideBarOutline) {
imagerectangle($this->image, $x1, $y1, $x2, $y2, $this->outline_color);
}
}
// display data values
if ($this->bool_data_values) {
$dataX = ($x1 + ($this->bar_width) / 2) - ((strlen($item) * $this->data_value_text_width) / 2);
//value to be graphed is equal/over 0
if ($item >= 0) {
$dataY=$y1-$this->data_value_padding-$this->data_value_text_height;
}
else {
//check for item values below user spec'd range
if ($this->bool_user_data_range && $item <= $this->data_range_min) {
$dataY = $y1 - $this->data_value_padding - $this->data_value_text_height;
}
else {
$dataY = $y1 + $this->data_value_padding;
}
}
//add currency sign, formatting etc
if ($this->data_format_array) {
$item = $this->applyDataFormats($item);
}
if ($this->data_currency) {
$item = $this->applyDataCurrency($item);
}
//recenter data position if necessary
$dataX -= ($this->data_additional_length * $this->data_value_text_width) / 2;
imagestring($this->image, 2, $dataX, $dataY, $item, $this->data_value_color);
}
//write x axis value
if ($this->bool_x_axis_values) {
if ($data_set_num == $this->data_set_count - 1) {
if ($this->bool_x_axis_values_vert) {
if ($this->bool_all_negative) {
//we must put values above 0 line
$textVertPos = round($this->y_axis_y2 - $this->axis_value_padding);
}
else {
//mix of both pos and neg numbers
//write value y axis bottom value (will be under bottom of grid even if x axis is floating due to
$textVertPos = round($this->y_axis_y1 + (strlen($key) * $this->text_width) + $this->axis_value_padding);
}
$textHorizPos = round($xStart + ($this->bar_width / 2) - ($this->text_height / 2));
imagestringup($this->image, 2, $textHorizPos, $textVertPos, $key, $this->x_axis_text_color);
}
else {
if ($this->bool_all_negative) {
//we must put values above 0 line
$textVertPos = round($this->y_axis_y2 - $this->text_height - $this->axis_value_padding);
}
else {
//mix of both pos and neg numbers
//write value y axis bottom value (will be under bottom of grid even if x axis is floating
$textVertPos=round($this->y_axis_y1 + ($this->text_height * 2 / 3)-$this->axis_value_padding);
}
//horizontal data keys
$textHorizPos = round($xStart + ($this->bar_width / 2) - ((strlen($key) * $this->text_width) / 2));
imagestring($this->image, 2, $textHorizPos, $textVertPos, $key, $this->x_axis_text_color);
}
}
}
$xStart += $this->bar_width + $this->space_width;
$last_y1[$data_set_num][$key] = $y1;
}
}
}
function addData($data, $data2 = '', $data3 = '', $data4 = '', $data5 = '') {
if (is_array($data)){ $this->data_array[]=$data; }
if (is_array($data2)){ $this->data_array[]=$data2; }
if (is_array($data3)){ $this->data_array[]=$data3; }
if (is_array($data4)){ $this->data_array[]=$data4; }
if (is_array($data5)){ $this->data_array[]=$data5; }
//assess data
$min = $this->data_max_allowable;
$max = $this->data_min_allowable;
$this->data_count=0;
$key_max = array();
//loop through each row, adding values to keyed arrays to find combined max
foreach ($this->data_array as $data_set_num => $data_set) {
foreach ($data_set as $key => $item) {
if (!is_numeric($item)) {
unset($this->data_array[$data_set_num][$key]);
}
else {
$key_max[$key] = isset($key_max[$key]) ? $key_max[$key] + $item : $item;
if($key_max[$key] < $min){ $min = $key_max[$key]; }
if($key_max[$key] > $max){ $max = $key_max[$key]; }
}
}
//find the count of the dataset with the most data points
$count = count($this->data_array[$data_set_num]);
$count > $this->data_count ? $this->data_count = $count : NULL;
}
//number of valid data sets
$this->data_set_count = count($this->data_array);
if ($this->data_set_count == 0) {
$this->error[] = "No valid datasets added in adddata() function.";
}
else {
$this->calcMinMax($min, $max);
}
}
function setLine() { $this->error[] = __function__ . '() function not allowed in PHPGraphLib Stacked extension.'; }
function setDataPointSize() { $this->error[] = __function__ . '() function not allowed in PHPGraphLib Stacked extension.'; }
function setDataPoints() { $this->error[] = __function__ . '() function not allowed in PHPGraphLib Stacked extension.'; }
function setDataValues() { $this->error[] = __function__ . '() function not allowed in PHPGraphLib Stacked extension.'; }
}
?>
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