<?
/*
Piotr Trawinski <piotr.trawinski@weblab.pl> 2001.05.01
Modified by Clive Smart <clive@dev.co.za> 2001.05.02
If you make any improvements to this class please let me
know so that i can put them up here.
Examples included on the bottom
This software is Free like Linux
*/
class HTML_graph {
var $text; // Text describtions of elements
var $value; // Element values
var $size; // (array) Width or height of the image
var $size2; // constant for all elements height or width
var $decp; // Decimal Places for Percentage
var $colour; // Bar Colour - Hex eg FACE00
var $bgcolour; // Background Colour - Hex eg FACE00
var $border; // Border Size
var $scale; // Maximum x/y Scale
var $perc; // (array) Percentage values after calculations
var $elements; // Number of elements to be shown
function set($text,$value,$scale,$size2,$decp=2,$colour="FF0000",$bgcolour="",$border=0) {
$this->text = $text;
$this->value = $value;
$this->scale = $scale;
$this->size2 = $size2;
$this->decp = $decp;
$this->colour = $colour;
$this->bgcolour = $bgcolour;
$this->border = $border;
}
function calculate() {
// Calculate Colours
$this->r = hexdec(substr($this->colour,0,2));
$this->g = hexdec(substr($this->colour,2,2));
$this->b = hexdec(substr($this->colour,4,2));
$this->elements = count($this->value);
// Calculate Values
for ($i=0; $i < $this->elements; $i++) {
$sumvalue += $this->value[$i];
}
for ($i=0; $i < $this->elements;$i++) {
if ($this->value[$i] != 0) {
// Fixed the Percentage Calculation to be more accurate
$bar_perc = (100 * $this->value[$i] / $sumvalue);
$bar_perc = $bar_perc * pow(10,$this->decp);
$bar_perc = round($bar_perc);
$bar_perc = $bar_perc / pow(10,$this->decp);
$this->size[$i] = (int)($this->value[$i] * ($this->scale / $sumvalue));
} elseif ($this->value[$i]==0) {
$bar_perc=0.00;
}
// Handle Decimal Places
if ($this->decp > 0) {
$prtf = "%.".$this->decp."f%% ";
} else {
$prtf = "%d%% ";
}
$this->perc[$i] = sprintf($prtf, $bar_perc);
}
}
function sort() { // Function to sort values descending ...
#in the future
}
function horizontal() { // Needs: @text @value @perc @size $elements $height
$this->calculate();
$html = "<TABLE cellspacing=3 cellpadding=3 border=".$this->border." bgcolor=#".$this->bgcolour.">\n <TR>\n <TD>\n";
$html .= " <TABLE align=center cellspacing=0 cellpadding=0 border=0>\n";
for ($i=0; $i < $this->elements; $i++) {
$html .= " <TR>\n <TD height=15 align=right>".$this->text[$i]."</TD>\n";
$html .= " <TD> </TD>\n <TD valign=top>";
if ($this->value[$i] != 0) {
$html .= "<IMG src='im.php3?r=".$this->r."&g=".$this->g."&b=".$this->b."' height=".$this->size2." width=".$this->size[$i]."> ";
}
$html .= $this->perc[$i]." (".($this->value[$i]).")</TD>\n";
}
$html .= " </TR>\n </TABLE>\n";
$html .= " </TD>\n </TR>\n</TABLE>\n";
return $html;
}
function vertical () {
$html = "<TABLE cellspacing=3 cellpadding=3 border=".$this->border." bgcolor=#".$this->bgcolour.">\n <TR>\n <TD>\n";
$html .= " <TABLE align=center cellspacing=0 cellpadding=0 border=0>\n <TR>\n";
for ($i=0; $i < $this->elements; $i++) {
$html .= " <TD valign=bottom align=middle>".$this->perc[$i]."<BR>";
if ($this->value[$i] != 0) {
$html .= "<IMG src='im.php3?r=".$this->r."&g=".$this->g."&b=".$this->b."' width=".$this->size2." height=".$this->size[$i].">";
}
$html .= "</TD>\n";
}
$html .= " </TR>\n <TR>\n";
for ($i=0; $i < $this->elements; $i++) {
$html .= " <TD width=20 valign=top align=middle>(".$this->value[$i].")<BR>".$this->text[$i]."</TD>\n";
}
$html .= " </TR>\n </TABLE>\n";
$html .= " </TD>\n </TR>\n</TABLE>\n";
return $html;
}
}
// Examples
Header("Content-type: text/html");
$bar = new HTML_graph;
$text = array("Absolutly","Yes","No","Not sure");
$value = array (100,50,40,50);
# There are 4 input values
# Required
# 1. text elements,
# 2. Numerical values,
# 3. Scale - sets the maximum width or height for a bar
# 4. Value constant for all all elements height (horizontal) or width (vertical)
# Optional
# 5. Decimal Places to display in the Percentage - Default=2
# 6. Bar Colour in Hex (eg. A0A0A8) - Default=FF0000 (Red)
# 7. Background Colour in Hex (eg. A0A0A8) - Default='' (None)
# 8. Boder Size - Default=0
$bar->set($text,$value,300,10,0,"FACE00","A0A0A0",2);
echo $bar->horizontal();
echo "<HR>";
echo $bar->vertical();
?>
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