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<?php
/*=======================================================================
// File: JPGRAPH_CANVAS.PHP
// Description: Canvas drawing extension for JpGraph
// Created: 2001-01-08
// Ver: $Id: jpgraph_canvas.php 1923 2010-01-11 13:48:49Z ljp $
//
// Copyright (c) Aditus Consulting. All rights reserved.
//========================================================================
*/
//===================================================
// CLASS CanvasGraph
// Description: Creates a simple canvas graph which
// might be used together with the basic Image drawing
// primitives. Useful to auickoly produce some arbitrary
// graphic which benefits from all the functionality in the
// graph liek caching for example.
//===================================================
class CanvasGraph extends Graph {
//---------------
// CONSTRUCTOR
function __construct($aWidth=300,$aHeight=200,$aCachedName="",$timeout=0,$inline=1) {
parent::__construct($aWidth,$aHeight,$aCachedName,$timeout,$inline);
}
//---------------
// PUBLIC METHODS
function InitFrame() {
$this->StrokePlotArea();
}
// Method description
function Stroke($aStrokeFileName="") {
if( $this->texts != null ) {
for($i=0; $i < count($this->texts); ++$i) {
$this->texts[$i]->Stroke($this->img);
}
}
if( $this->iTables !== null ) {
for($i=0; $i < count($this->iTables); ++$i) {
$this->iTables[$i]->Stroke($this->img);
}
}
$this->StrokeTitles();
// If the filename is the predefined value = '_csim_special_'
// we assume that the call to stroke only needs to do enough
// to correctly generate the CSIM maps.
// We use this variable to skip things we don't strictly need
// to do to generate the image map to improve performance
// a best we can. Therefor you will see a lot of tests !$_csim in the
// code below.
$_csim = ($aStrokeFileName===_CSIM_SPECIALFILE);
// We need to know if we have stroked the plot in the
// GetCSIMareas. Otherwise the CSIM hasn't been generated
// and in the case of GetCSIM called before stroke to generate
// CSIM without storing an image to disk GetCSIM must call Stroke.
$this->iHasStroked = true;
if( !$_csim ) {
// Should we do any final image transformation
if( $this->iImgTrans ) {
if( !class_exists('ImgTrans',false) ) {
require_once('jpgraph_imgtrans.php');
}
$tform = new ImgTrans($this->img->img);
$this->img->img = $tform->Skew3D($this->iImgTransHorizon,$this->iImgTransSkewDist,
$this->iImgTransDirection,$this->iImgTransHighQ,
$this->iImgTransMinSize,$this->iImgTransFillColor,
$this->iImgTransBorder);
}
// If the filename is given as the special _IMG_HANDLER
// then the image handler is returned and the image is NOT
// streamed back
if( $aStrokeFileName == _IMG_HANDLER ) {
return $this->img->img;
}
else {
// Finally stream the generated picture
$this->cache->PutAndStream($this->img,$this->cache_name,$this->inline,$aStrokeFileName);
return true;
}
}
}
} // Class
/* EOF */
?>
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