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php/phpgraphlib_stacked.php
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213
php/phpgraphlib_stacked.php
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<?php
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/*
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PHPGraphLib Graphing Library
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The first version PHPGraphLib was written in 2007 by Elliott Brueggeman to
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deliver PHP generated graphs quickly and easily. It has grown in both features
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and maturity since its inception, but remains PHP 4.04+ compatible. Originally
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available only for paid commerial use, PHPGraphLib was open-sourced in 2013
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under the MIT License. Please visit http://www.ebrueggeman.com/phpgraphlib
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for more information.
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---
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The MIT License (MIT)
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Copyright (c) 2013 Elliott Brueggeman
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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class PHPGraphLibStacked extends PHPGraphLib
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{
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protected function generateBars()
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{
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$this->finalizeColors();
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$barCount = 0;
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$adjustment = 0;
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$last_y1 = array();
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$last_y2 = array();
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if ($this->bool_user_data_range && $this->data_min >= 0) {
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$adjustment = $this->data_min * $this->unit_scale;
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}
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$this->data_array = array_reverse($this->data_array);
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foreach ($this->data_array as $data_set_num => $data_set) {
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$lineX2 = null;
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$xStart = $this->y_axis_x1 + ($this->space_width / 2);
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foreach ($data_set as $key => $item) {
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$hideBarOutline = false;
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$x1 = round($xStart);
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$x2 = round($xStart + $this->bar_width);
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if ($data_set_num > 0) {
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//find last set valid value for this dataset incase prior values were not set
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$found = false;
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$i = 1;
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//default last to base in case none are found
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$last = $this->x_axis_y1;
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while ($found == false && ($data_set_num - $i) >= 0) {
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if (isset($last_y1[$data_set_num - $i][$key])) {
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$last = $last_y1[$data_set_num - $i][$key];
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$found = true;
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}
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$i++;
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}
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$y2 = round($last);
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$y1 = round(($y2 - ($item * $this->unit_scale) + $adjustment));
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} else {
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$y2 = round($this->x_axis_y1);
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$y1 = round((($this->x_axis_y1 - ($item * $this->unit_scale) + $adjustment)));
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}
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//if we are using a user specified data range, need to limit what's displayed
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if ($this->bool_user_data_range) {
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if ($item <= $this->data_range_min) {
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//don't display, we are out of our allowed display range!
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$y1 = $y2;
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$hideBarOutline = true;
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} elseif ($item >= $this->data_range_max) {
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//display, but cut off display above range max
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$y1 = $this->x_axis_y1 - ($this->actual_displayed_max_value * $this->unit_scale) + $adjustment;
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}
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}
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//draw bar and outline if nonzero
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if ($this->bool_bars && $item != 0) {
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if ($this->bool_gradient) {
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$this->drawGradientBar($x1, $y1, $x2, $y2, $this->multi_gradient_colors_1[$data_set_num], $this->multi_gradient_colors_2[$data_set_num], $data_set_num);
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} else {
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imagefilledrectangle($this->image, $x1, $y1,$x2, $y2, $this->multi_bar_colors[$data_set_num]);
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}
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//draw bar outline
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if ($this->bool_bar_outline && !$hideBarOutline) {
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imagerectangle($this->image, $x1, $y1, $x2, $y2, $this->outline_color);
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}
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}
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// display data values
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if ($this->bool_data_values) {
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$dataX = ($x1 + ($this->bar_width) / 2) - ((strlen($item) * self::DATA_VALUE_TEXT_WIDTH) / 2);
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//value to be graphed is equal/over 0
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if ($item >= 0) {
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$dataY = $y1 - $this->data_value_padding - self::DATA_VALUE_TEXT_HEIGHT;
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} else {
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//check for item values below user spec'd range
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if ($this->bool_user_data_range && $item <= $this->data_range_min) {
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$dataY = $y1 - $this->data_value_padding - self::DATA_VALUE_TEXT_HEIGHT;
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} else {
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$dataY = $y1 + $this->data_value_padding;
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}
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}
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//add currency sign, formatting etc
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if ($this->data_format_array) {
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$item = $this->applyDataFormats($item);
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}
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if ($this->data_currency) {
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$item = $this->applyDataCurrency($item);
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}
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//recenter data position if necessary
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$dataX -= ($this->data_additional_length * self::DATA_VALUE_TEXT_WIDTH) / 2;
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imagestring($this->image, 2, $dataX, $dataY, $item, $this->data_value_color);
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}
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//write x axis value
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if ($this->bool_x_axis_values) {
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if ($data_set_num == $this->data_set_count - 1) {
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if ($this->bool_x_axis_values_vert) {
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if ($this->bool_all_negative) {
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//we must put values above 0 line
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$textVertPos = round($this->y_axis_y2 - self::AXIS_VALUE_PADDING);
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} else {
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//mix of both pos and neg numbers
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//write value y axis bottom value (will be under bottom of grid even if x axis is floating due to
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$textVertPos = round($this->y_axis_y1 + (strlen($key) * self::TEXT_WIDTH) + self::AXIS_VALUE_PADDING);
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}
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$textHorizPos = round($xStart + ($this->bar_width / 2) - (self::TEXT_HEIGHT / 2));
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imagestringup($this->image, 2, $textHorizPos, $textVertPos, $key, $this->x_axis_text_color);
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} else {
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if ($this->bool_all_negative) {
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//we must put values above 0 line
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$textVertPos = round($this->y_axis_y2 - self::TEXT_HEIGHT - self::AXIS_VALUE_PADDING);
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} else {
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//mix of both pos and neg numbers
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//write value y axis bottom value (will be under bottom of grid even if x axis is floating
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$textVertPos=round($this->y_axis_y1 + (self::TEXT_HEIGHT * 2 / 3) - self::AXIS_VALUE_PADDING);
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}
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//horizontal data keys
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$textHorizPos = round($xStart + ($this->bar_width / 2) - ((strlen($key) * self::TEXT_WIDTH) / 2));
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imagestring($this->image, 2, $textHorizPos, $textVertPos, $key, $this->x_axis_text_color);
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}
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}
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}
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$xStart += $this->bar_width + $this->space_width;
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$last_y1[$data_set_num][$key] = $y1;
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}
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}
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}
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public function addData($data, $data2 = '', $data3 = '', $data4 = '', $data5 = '')
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{
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parent::addData($data, $data2, $data3, $data4, $data5);
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$key_max = array();
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//loop through each row, adding values to keyed arrays to find combined max
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foreach ($this->data_array as $data_set_num => $data_set) {
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foreach ($data_set as $key => $item) {
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$key_max[$key] = isset($key_max[$key]) ? $key_max[$key] + $item : $item;
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if ($key_max[$key] < $this->data_min) {
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$this->data_min = $key_max[$key];
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}
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if ($key_max[$key] > $this->data_max) {
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$this->data_max = $key_max[$key];
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}
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}
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}
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}
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public function setLine($bool)
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{
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$this->error[] = __function__ . '() function not allowed in PHPGraphLib Stacked extension.';
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}
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public function setDataPointSize($bool)
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{
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$this->error[] = __function__ . '() function not allowed in PHPGraphLib Stacked extension.';
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}
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public function setDataPoints($bool)
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{
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$this->error[] = __function__ . '() function not allowed in PHPGraphLib Stacked extension.';
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}
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public function setDataValues($bool)
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{
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$this->error[] = __function__ . '() function not allowed in PHPGraphLib Stacked extension.';
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}
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}
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