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