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<?php |
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/** |
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* This file holds the base Graph class for doing |
| 4 |
* graphs on an XY coordinate system. |
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* |
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* $Id: SVGXYGraph.inc,v 1.7 2003/03/04 22:18:27 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/SVGGraph.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: SVGXYGraph.inc,v 1.7 2003/03/04 22:18:27 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 SVGXYGraph extends SVGGraph { |
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|
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/** |
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* this holds the X axis data |
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*/ |
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var $_x_data = array(); |
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var $_min_x = 0; |
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var $_max_x = 0; |
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|
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/** |
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* this holds the Y axis data |
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*/ |
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var $_y_data = array(); |
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var $_min_y = 0; |
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var $_max_y = 0; |
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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 $_colors = array(); |
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|
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|
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function SVGXYGraph($title, $width, $height) { |
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|
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//set up the options. |
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$this->_add_options(); |
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|
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$this->set_title($title); |
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$this->set_width($width); |
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$this->set_height($height); |
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} |
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|
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|
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/** |
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* This is a stub for building the title(s) |
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* for the graph |
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* |
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* @return Container |
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*/ |
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function _build_titles() { |
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$container = container( |
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$this->_build_title(), |
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$this->_x_axis_title(), |
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$this->_y_axis_title()); |
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|
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return $container; |
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} |
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|
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|
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/** |
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* This function does the work of |
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* building the graph itself |
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* |
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* @return Container |
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*/ |
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function _build_graph() { |
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$container = container(); |
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|
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//now build the background gradient? |
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$container->add( $this->_background() ); |
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|
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//now render the lines |
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$container->add( $this->_build_x_axis() ); |
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$container->add( $this->_build_y_axis() ); |
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|
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$container->add( $this->graph_data() ); |
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return $container; |
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} |
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|
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/** |
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* this method adds our own options that |
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* are different from the parent class |
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*/ |
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function _add_options() { |
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|
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//the style for the text for the |
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//x/y/z axis titles |
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$this->set_option("axis_title_style", |
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"font-size:12px;font-weight:bold;". |
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"font-family: geneva, trebuchet ms"); |
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|
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$this->set_option("graph_background", "#EEEEEE"); |
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|
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//the fill color for the axis grid lines |
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$this->set_option("axis_grid_line_color", "#999999"); |
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$this->set_option("border_color", "#000000"); |
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|
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//the title for the axis |
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$this->set_option("x_title", ""); |
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$this->set_option("y_title", ""); |
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|
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//the # of divisions/lines for the x axis |
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$this->set_option("x_grid_lines", 0); |
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$this->set_option("x_grid_lines_on", FALSE); |
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$this->set_option("y_grid_lines", 0); |
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$this->set_option("y_grid_lines_on", FALSE); |
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|
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$this->set_option("x_tickmark_length", 3); |
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$this->set_option("y_tickmark_length", 3); |
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|
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$this->set_option("x1_margin", 0); |
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$this->set_option("x2_margin", 0); |
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$this->set_option("y1_margin", 5); |
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$this->set_option("y2_margin", 0); |
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} |
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|
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/** |
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* This function is used to set the |
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* title for the X Axis |
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* |
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* @param string - the title |
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*/ |
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function set_x_title( $title ) { |
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$this->set_option("x_title", $title); |
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} |
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|
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/** |
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* This function is used to set the |
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* title for the Y Axis |
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* |
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* @param string - the title |
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*/ |
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function set_y_title( $title ) { |
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$this->set_option("y_title", $title); |
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} |
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|
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/** |
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* This function is used to add |
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* a new set of x values for the graph. |
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* |
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* NOTE: this must be a comma delimited |
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* list of values. |
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* |
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* @param string - the values |
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*/ |
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function add_x_values($x_values) { |
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$this->_x_data[] = $x_values; |
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} |
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|
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/** |
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* This function is used to add |
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* a new set of y values for the graph. |
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* |
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* NOTE: this must be a comma delimited |
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* list of values. |
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* |
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* @param string - the values |
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*/ |
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function add_y_values($y_values) { |
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$this->_y_data[] = $y_values; |
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} |
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|
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|
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/** |
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* This enables/disables the rendering |
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* of the grid lines for an axis |
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* |
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* @param string - the axis, x/y only |
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* @param boolean - TRUE = Enabled |
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*/ |
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function set_grid_line_flag($axis, $flag=TRUE) { |
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$axis = strtolower($axis); |
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switch ($axis) { |
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case "x": |
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case "y": |
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$this->set_option($axis."_grid_lines_on", $flag); |
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break; |
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default: |
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break; |
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} |
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} |
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|
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/** |
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* This is used to set how many grid lines |
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* to draw for an axis |
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* |
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* @param string - the axis, x/y only |
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* @param int - how many lines |
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*/ |
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function set_axis_grid_points($axis, $points) { |
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$axis = strtolower($axis); |
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switch ($axis) { |
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case "x": |
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case "y": |
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$this->set_option($axis."_grid_lines",$points); |
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break; |
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default: |
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break; |
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} |
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} |
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|
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/** |
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* This allows you to set the color of the |
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* axis grid lines |
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* |
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* @param string - the color name |
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*/ |
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function set_grid_line_color( $color ) { |
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$this->set_option("axis_grid_line_color", $color); |
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} |
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|
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/** |
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* We need this to calculate the min,max values for |
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* both all x points and all y data points, so we |
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* can scale the graph correctly |
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*/ |
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function _prepare_data() { |
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$_min_x = array(); |
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$_min_y = array(); |
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|
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$_max_x = array(); |
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$_max_y = array(); |
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|
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$num_datas = count($this->_x_data); |
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|
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for( $i=0; $i<=$num_datas-1; $i++) { |
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$x_data = explode(",", $this->_x_data[$i] ); |
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$y_data = explode(",", $this->_y_data[$i] ); |
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$_min_x[] = min($x_data); |
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$_min_y[] = min($y_data); |
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$_max_x[] = max($x_data); |
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$_max_y[] = max($y_data); |
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} |
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|
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$this->_min_x = min($_min_x); |
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$this->_min_y = min($_min_y); |
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|
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$this->_max_x = max($_max_x); |
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$this->_max_y = max($_max_y); |
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|
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// calculate distance from the left border to the drawing area |
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$longest_number = @max($this->y_data); |
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|
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$this->_draw["x1"] = 2*$this->_options["axis_label_font_height"] + |
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(strlen($this->format_label($this->_max_y))+3)*$this->_options["axis_font_width"]; |
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|
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$this->_draw["x2"] = $this->_options["width"]-1; |
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|
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$this->_draw["y1"] = $this->_options["title_font_height"] + $this->_options["top_margin"]; |
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|
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$this->_draw["y2"] = $this->_options["height"] - (2*$this->_options["title_font_height"] + $this->_options["top_margin"]) + |
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3*$this->_options["axis_font_height"]; |
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|
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$this->_draw["draw_width"] = $this->_draw["x2"] - $this->_draw["x1"]; |
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$this->_draw["draw_height"] = $this->_draw["y2"] - $this->_draw["y1"]; |
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|
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// how many ticks will fit |
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if (!$this->_options["y_grid_lines"]) { |
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$this->_options["y_grid_lines"] = round(($this->_draw["draw_height"])/($this->_options["axis_font_height"]+10)); |
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} |
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|
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if (!$this->_options["x_grid_lines"]) { |
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$this->_options["x_grid_lines"] = round(($this->_draw["draw_width"])/($this->_options["axis_font_width"]+10)); |
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} |
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|
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|
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//calculate the distance between lines |
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$this->_draw["x_line_space"] = ($this->_draw["draw_width"]-2)/$this->_options["x_grid_lines"]; |
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$this->_draw["y_line_space"] = ($this->_draw["draw_height"]-2)/$this->_options["y_grid_lines"]; |
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|
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} |
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|
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/** |
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* This method builds the text title area |
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* that lives in the X axis |
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* |
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* @return TEXTsvgtag |
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*/ |
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function _x_axis_title() { |
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$x = $this->_draw["x2"] - (strlen($this->_options["x_title"])*$this->_options["axis_label_font_width"])/2; |
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$y = $this->_options["height"]-$this->_options["bottom_margin"]; |
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|
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$text = svg_text($x,$y); |
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$text->set_style($this->_options["axis_title_style"]); |
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$text->add( $this->_options["x_title"] ); |
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$text->set_collapse(); |
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return $text; |
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} |
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|
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/** |
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* This method builds the text title area |
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* that lives in the X axis |
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* |
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* @return TEXTsvgtag |
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*/ |
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function _y_axis_title() { |
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$x = 10+$this->_options["left_margin"]; |
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$y = $this->_draw["y1"] + (strlen($this->_options["y_title"])*$this->_options["axis_label_font_width"])/2; |
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$text = svg_text($x,$y); |
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$text->set_style($this->_options["axis_title_style"]); |
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$text->set_tag_attribute("transform", "rotate(270,$x,$y)"); |
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$text->add( $this->_options["y_title"] ); |
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$text->set_collapse(); |
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return $text; |
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} |
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|
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|
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function _background() { |
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|
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$rect = svg_rect($this->_draw["x1"],$this->_draw["y1"], |
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$this->_draw["draw_width"],$this->_draw["draw_height"], |
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$this->_options["graph_background"], "black", 2); |
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$container = container( $rect ); |
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|
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return $container; |
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} |
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|
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/** |
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* This function returns the pixel positions |
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* of a data point |
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* |
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* @param float data point |
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* |
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* @return int position in pixels |
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*/ |
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function get_y_position($y) { |
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$pos = ($this->_draw["y2"] - $this->_options["y2_margin"]) - ($y - $this->_min_y) * |
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$this->_draw["draw_height"] / ($this->_max_y - $this->_min_y); |
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|
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return $pos; |
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} |
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|
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|
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/** |
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* This function returns the pixel positions |
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* of a data point |
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* |
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* @param float data point |
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* |
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* @return int position in pixels |
| 359 |
*/ |
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function get_x_position($x) { |
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$pos = ($this->_draw["x1"] + $this->_options["x1_margin"]) + ($x - $this->_min_x) * |
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$this->_draw["draw_width"] / ($this->_max_x - $this->_min_x); |
| 363 |
|
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return $pos; |
| 365 |
} |
| 366 |
|
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/** |
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* This function builds the X axis |
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* and its measurement lines/marks |
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* |
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* @return Container |
| 372 |
*/ |
| 373 |
function _build_x_axis() { |
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|
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// what is the tick step |
| 376 |
$tick_step = round(($this->_max_x - $this->_min_x)/$this->_options["x_grid_lines"]); |
| 377 |
if ($tick_step<1) $tick_step=1; |
| 378 |
|
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$container = container(); |
| 380 |
|
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$x = $this->_min_x; |
| 382 |
while ($x <= $this->_max_x) { |
| 383 |
$x_pos = $this->get_x_position($x); |
| 384 |
$y_pos = $this->_draw["y2"] - $this->_options["x_tickmark_length"]; |
| 385 |
|
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if ($x > $this->_min_x) { |
| 387 |
$tick = svg_line($x_pos, $this->_draw["y2"]+1, |
| 388 |
$x_pos, $this->_draw["y2"] + $this->_options["x_tickmark_length"]+1, |
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$this->_options["border_color"], 1); |
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|
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$line = svg_line($x_pos, $this->_draw["y2"]-1, |
| 392 |
$x_pos, $this->_draw["y1"]+1, |
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$this->_options["axis_grid_line_color"], 1); |
| 394 |
|
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$container->add( $tick, $line ); |
| 396 |
|
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} |
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|
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$value = $this->format_label($x); |
| 400 |
|
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$text = svg_text($x_pos - (strlen($value)*$this->_options["axis_font_width"]/2), |
| 402 |
$this->_draw["y2"] + $this->_options["x_tickmark_length"] + |
| 403 |
$this->_options["axis_font_height"]*2); |
| 404 |
$text->set_collapse(); |
| 405 |
$text->set_style( "font-size:9;font-family: arial, geneva, trebuchet ms" ); |
| 406 |
$text->add( $value ); |
| 407 |
|
| 408 |
$container->add( $text ); |
| 409 |
|
| 410 |
$x += $tick_step; |
| 411 |
|
| 412 |
} |
| 413 |
|
| 414 |
$rect = svg_rect($this->_draw["x1"],$this->_draw["y1"], |
| 415 |
$this->_draw["draw_width"],$this->_draw["draw_height"], |
| 416 |
"none", "black", 2); |
| 417 |
$container->add( $rect ); |
| 418 |
|
| 419 |
return $container; |
| 420 |
} |
| 421 |
|
| 422 |
/** |
| 423 |
* This function builds the Y axis |
| 424 |
* and its measurement lines/marks |
| 425 |
* |
| 426 |
* @return Container |
| 427 |
*/ |
| 428 |
function _build_y_axis() { |
| 429 |
|
| 430 |
// what is the tick step |
| 431 |
$tick_step = round(($this->_max_y - $this->_min_y)/$this->_options["y_grid_lines"]); |
| 432 |
if ($tick_step<1) $tick_step=1; |
| 433 |
|
| 434 |
$container = container(); |
| 435 |
|
| 436 |
$y = $this->_min_y; |
| 437 |
while( $y <= $this->_max_y ) { |
| 438 |
$y_pos = $this->get_y_position($y); |
| 439 |
$x_pos = $this->_draw["x1"] - $this->_options["y_tickmark_length"]; |
| 440 |
|
| 441 |
if ($y > $this->_min_y) { |
| 442 |
$tick = svg_line($this->_draw["x1"] - $this->_options["y_tickmark_length"], |
| 443 |
$y_pos, $this->_draw["x1"] - 1, $y_pos, |
| 444 |
$this->_options["border_color"],1); |
| 445 |
|
| 446 |
$line = svg_line($this->_draw["x1"] + 1, $y_pos, |
| 447 |
$this->_draw["x2"] - 1, $y_pos, |
| 448 |
$this->_options["axis_grid_line_color"],1); |
| 449 |
|
| 450 |
$container->add( $tick, $line ); |
| 451 |
} |
| 452 |
|
| 453 |
$value = $this->format_label($y); |
| 454 |
|
| 455 |
$text = svg_text($x_pos - (strlen($value) * $this->_options["axis_font_width"]) - 2, |
| 456 |
$y_pos + $this->_options["axis_font_height"]/2); |
| 457 |
$text->set_collapse(); |
| 458 |
$text->set_style( "font-size:9;font-family: arial, geneva, trebuchet ms" ); |
| 459 |
$text->add( $value ); |
| 460 |
|
| 461 |
$container->add( $text ); |
| 462 |
|
| 463 |
$y += $tick_step; |
| 464 |
} |
| 465 |
|
| 466 |
return $container; |
| 467 |
} |
| 468 |
|
| 469 |
|
| 470 |
} |
| 471 |
?> |
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