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<?php |
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/** |
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* This file holds the base Graph class for doing |
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* graphs on an XY coordinate system. |
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* |
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* $Id: SVGXYLineGraph.inc,v 1.6 2003/03/04 22:18:28 hemna Exp $ |
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* |
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* @author Walter A. Boring IV <waboring@buildabetterweb.com> |
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* @package phpHtmlLib |
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* @subpackage SVG |
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*/ |
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|
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/** |
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* we need the SVGGraph class |
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*/ |
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require_once($phphtmllib."/widgets/svg/SVGXYPlotGraph.inc"); |
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|
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/** |
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* This is the base Graph class for doing XY coordinate |
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* system based graphs in SVG. |
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* |
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* $Id: SVGXYLineGraph.inc,v 1.6 2003/03/04 22:18:28 hemna Exp $ |
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* |
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* @author Walter A. Boring IV <waboring@buildabetterweb.com> |
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* @package phpHtmlLib |
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* @subpackage SVG |
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*/ |
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class SVGXYLineGraph extends SVGXYPlotGraph { |
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|
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|
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/** |
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* holds the colors for each of |
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* the lines |
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*/ |
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var $_line_colors = array(); |
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|
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/** |
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* This enables you to add another line |
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* to the graph |
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* |
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* @param string - the x coordinates |
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* @param string - the y coordinates |
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* @param string - the color for the line |
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*/ |
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function add_line($x_values, $y_values, $color="red") { |
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$this->add_x_values($x_values); |
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$this->add_y_values($y_values); |
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$this->_colors[] = $color; |
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} |
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|
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|
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/** |
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* This function does the work of |
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* building the graph itself |
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* |
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* @return Container |
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*/ |
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function graph_data() { |
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$container = container(); |
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|
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$num_lines = count($this->_x_data); |
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for( $i=0; $i<=$num_lines-1; $i++) { |
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$container->add( $this->_build_line($this->_x_data[$i], |
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$this->_y_data[$i], |
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$this->_colors[$i]) ); |
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} |
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return $container; |
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} |
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|
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|
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function _build_line($x_data, $y_data, $color) { |
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$x_data = explode(",", $x_data); |
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$y_data = explode(",", $y_data); |
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$num_points = count($y_data); |
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|
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$container = container(); |
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$x0 = $this->_draw["x1"]; |
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$y0 = $this->_draw["y2"]; |
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|
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for($i=0; $i<$num_points-1; $i++) { |
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$x1=$x0+($x_data[$i]-$this->_min_x)*$this->_draw["draw_width"]/($this->_max_x-$this->_min_x); |
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$x2=$x0+($x_data[$i+1]-$this->_min_x)*$this->_draw["draw_width"]/($this->_max_x-$this->_min_x); |
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|
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$y1=$y0-($y_data[$i]-$this->_min_y)*$this->_draw["draw_height"]/($this->_max_y-$this->_min_y); |
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$y2=$y0-($y_data[$i+1]-$this->_min_y)*$this->_draw["draw_height"]/($this->_max_y-$this->_min_y); |
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|
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$container->add( svg_line($x1, $y1, $x2, $y2, $color, 2) ); |
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|
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$container->add( $this->_build_point($x1, $y1, 2, $color, $color) ); |
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$container->add( $this->_build_point($x2, $y2, 2, $color, $color) ); |
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|
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} |
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|
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return $container; |
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} |
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|
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} |
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|
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?> |
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