<?php
//=======================================================================
// File:	JPGRAPH_PLOTMARK.PHP
// Description:	Class file. Handles plotmarks
// Created: 	2003-03-21
// Author:	Johan Persson (johanp@aditus.nu)
// Ver:		$Id: jpgraph_plotmark.inc,v 1.9 2003/05/28 20:45:05 aditus Exp $
//
// License:	This code is released under QPL 1.0 
// Copyright (C) 2003 Johan Persson 
//========================================================================


//========================================================================
// CLASS ImgData
// Description: Base class for all image data classes that contains the 
// real image data.
//========================================================================
class ImgData {
    var $name = '';		// Each subclass gives a name
    var $an = array();		// Data array names
    var $colors = array();	// Available colors
    var $index  = array();	// Index for colors
    var $maxidx = 0 ;		// Max color index
    var $anchor_x=0.5, $anchor_y=0.5 ;    // Where is the center of the image
    // Create a GD image from the data and return a GD handle
    function GetImg($aMark,$aIdx) {
	$n = $this->an[$aMark];
	if( is_string($aIdx) ) {
	    if( !in_array($aIdx,$this->colors) ) {
		JpGraphError::Raise('This marker "'.($this->name).'" does not exist in color: '.$aIdx);
		die();
	    }
	    $idx = $this->index[$aIdx];
	}
	elseif( !is_integer($aIdx) || 
		(is_integer($aIdx) && $aIdx > $this->maxidx ) ) {
	    JpGraphError::Raise('Mark color index too large for marker "'.($this->name).'"');
	}
	else
	    $idx = $aIdx ;
	return imagecreatefromstring(base64_decode($this->{$n}[$idx][1]));   
    }
    function GetAnchor() {
	return array($this->anchor_x,$this->anchor_y);
    }
}


//===================================================
// CLASS PlotMark
// Description: Handles the plot marks in graphs
//===================================================
class PlotMark {
    var $title, $show=true;
    var $type,$weight=1;
    var $color="black", $width=4, $fill_color="blue";
    var $yvalue,$xvalue='',$csimtarget,$csimalt,$csimareas;
    var $iFormatCallback="";
    var $iFormatCallback2="";
    var $markimg='',$iScale=1.0;
    var $oldfilename='',$iFileName='';
    var $imgdata_balls = null;
    var $imgdata_diamonds = null;
    var $imgdata_squares = null;
    var $imgdata_bevels = null;
    var $imgdata_stars = null;
    var $imgdata_pushpins = null;

//--------------
// CONSTRUCTOR
    function PlotMark() {
	$this->title = new Text();
	$this->title->Hide();
	$this->csimareas = '';
	$this->csimalt = '';
	$this->type=-1;
    }
//---------------
// PUBLIC METHODS	
    function SetType($aType,$aFileName='',$aScale=1.0) {
	$this->type = $aType;
	if( $aType == MARK_IMG && $aFileName=='' ) {
	    JpGraphError::Raise('A filename must be specified if you set the mark type to MARK_IMG.');
	}
	$this->iFileName = $aFileName;
	$this->iScale = $aScale;
    }
	
    function SetCallback($aFunc) {
	$this->iFormatCallback = $aFunc;
    }

    function SetCallbackYX($aFunc) {
	$this->iFormatCallback2 = $aFunc;
    }
    
    function GetType() {
	return $this->type;
    }
	
    function SetColor($aColor) {
	$this->color=$aColor;
    }
	
    function SetFillColor($aFillColor) {
	$this->fill_color = $aFillColor;
    }

    function SetWeight($aWeight) {
	$this->weight = $aWeight;
    }

    // Synonym for SetWidth()
    function SetSize($aWidth) {
	$this->width=$aWidth;
    }
	
    function SetWidth($aWidth) {
	$this->width=$aWidth;
    }

    function SetDefaultWidth() {
	switch( $this->type ) {
	    case MARK_CIRCLE: 
	    case MARK_FILLEDCIRCLE: 
		$this->width=4;
		break;
	    default:
		$this->width=7;
	}
    }
	
    function GetWidth() {
	return $this->width;
    }
	
    function Hide($aHide=true) {
	$this->show = !$aHide;
    }
	
    function Show($aShow=true) {
	$this->show = $aShow;
    }

    function SetCSIMAltVal($aY,$aX='') {
        $this->yvalue=$aY; 
        $this->xvalue=$aX; 
    }
    
    function SetCSIMTarget($aTarget) {
        $this->csimtarget=$aTarget;
    }
    
    function SetCSIMAlt($aAlt) {
        $this->csimalt=$aAlt;
    }
    
    function GetCSIMAreas(){
        return $this->csimareas;
    }
        
    function AddCSIMPoly($aPts) {
        $coords = round($aPts[0]).", ".round($aPts[1]);
        $n = count($aPts)/2;
        for( $i=1; $i < $n; ++$i){
            $coords .= ", ".round($aPts[2*$i]).", ".round($aPts[2*$i+1]);
        }
        $this->csimareas="";    
        if( !empty($this->csimtarget) ) {
	    $this->csimareas .= "<area shape=\"poly\" coords=\"$coords\" href=\"".$this->csimtarget."\"";
	    if( !empty($this->csimalt) ) {										
		$tmp=sprintf($this->csimalt,$this->yvalue,$this->xvalue);
		$this->csimareas .= " alt=\"$tmp\" title=\"$tmp\"";
	    }
	    $this->csimareas .= ">\n";
	}
    }
    
    function AddCSIMCircle($x,$y,$r) {
    	$x = round($x); $y=round($y); $r=round($r);
        $this->csimareas="";    
        if( !empty($this->csimtarget) ) {
	    $this->csimareas .= "<area shape=\"circle\" coords=\"$x,$y,$r\" href=\"".$this->csimtarget."\"";
    	    if( !empty($this->csimalt) ) {										
		$tmp=sprintf($this->csimalt,$this->yvalue,$this->xvalue);
		$this->csimareas .= " alt=\"$tmp\" title=\"$tmp\"";
	    }
            $this->csimareas .= ">\n";        
        }
    }
    	
    function Stroke($img,$x,$y) {
	if( !$this->show ) return;

	if( $this->iFormatCallback != '' || $this->iFormatCallback2 != '' ) {

	    if( $this->iFormatCallback != '' ) {
		$f = $this->iFormatCallback;
		list($width,$color,$fcolor) = $f($this->yvalue);
		$filename = $this->iFileName;
		$imgscale = $this->iScale;
	    }
	    else {
		$f = $this->iFormatCallback2;
		list($width,$color,$fcolor,$filename,$imgscale) = $f($this->yvalue,$this->xvalue);
		if( $filename=="" ) $filename = $this->iFileName;
		if( $imgscale=="" ) $imgscale = $this->iScale;
	    }

	    if( $width=="" ) $width = $this->width;
	    if( $color=="" ) $color = $this->color;
	    if( $fcolor=="" ) $fcolor = $this->fill_color;

	}
	else {
	    $fcolor = $this->fill_color;
	    $color = $this->color;
	    $width = $this->width;
	    $filename = $this->iFileName;
	    $imgscale = $this->iScale;
	}


	if( $this->type == MARK_IMG || $this->type >= MARK_IMG_PUSHPIN ) {

	    // Note: For the builtin images we use the "filename" parameter
	    // to denote the color
	    $anchor_x = 0.5;
	    $anchor_y = 0.5; 
	    switch( $this->type ) {
		case MARK_IMG :
		    // Load an image and use that as a marker
		    // Small optimization, if we have already read an image don't
		    // waste time reading it again.
		    if( $this->markimg == '' || !($this->oldfilename === $filename) ) {
			$this->markimg = Graph::LoadBkgImage('',$filename);
			$this->oldfilename = $filename ;
		    }
		    break;

		case MARK_IMG_PUSHPIN:
		case MARK_IMG_SPUSHPIN:
		case MARK_IMG_LPUSHPIN:
		    if( $this->imgdata_pushpins == null ) {
			require_once 'imgdata_pushpins.inc';
			$this->imgdata_pushpins = new ImgData_PushPins();
		    }
		    $this->markimg = $this->imgdata_pushpins->GetImg($this->type,$filename);
		    list($anchor_x,$anchor_y) = $this->imgdata_pushpins->GetAnchor();
		    break;

		case MARK_IMG_SQUARE:
		    if( $this->imgdata_squares == null ) {
			require_once 'imgdata_squares.inc';
			$this->imgdata_squares = new ImgData_Squares();
		    }
		    $this->markimg = $this->imgdata_squares->GetImg($this->type,$filename);
		    list($anchor_x,$anchor_y) = $this->imgdata_squares->GetAnchor();
		    break;

		case MARK_IMG_STAR:
		    if( $this->imgdata_stars == null ) {
			require_once 'imgdata_stars.inc';
			$this->imgdata_stars = new ImgData_Stars();
		    }
		    $this->markimg = $this->imgdata_stars->GetImg($this->type,$filename);
		    list($anchor_x,$anchor_y) = $this->imgdata_stars->GetAnchor();
		    break;

		case MARK_IMG_BEVEL:
		    if( $this->imgdata_bevels == null ) {
			require_once 'imgdata_bevels.inc';
			$this->imgdata_bevels = new ImgData_Bevels();
		    }
		    $this->markimg = $this->imgdata_bevels->GetImg($this->type,$filename);
		    list($anchor_x,$anchor_y) = $this->imgdata_bevels->GetAnchor();
		    break;

		case MARK_IMG_DIAMOND:
		    if( $this->imgdata_diamonds == null ) {
			require_once 'imgdata_diamonds.inc';
			$this->imgdata_diamonds = new ImgData_Diamonds();
		    }
		    $this->markimg = $this->imgdata_diamonds->GetImg($this->type,$filename);
		    list($anchor_x,$anchor_y) = $this->imgdata_diamonds->GetAnchor();
		    break;

		case MARK_IMG_BALL:		    
		case MARK_IMG_SBALL:		    
		case MARK_IMG_MBALL:		    
		case MARK_IMG_LBALL:		    
		    if( $this->imgdata_balls == null ) {
			require_once 'imgdata_balls.inc';
			$this->imgdata_balls = new ImgData_Balls();
		    }
		    $this->markimg = $this->imgdata_balls->GetImg($this->type,$filename);
		    list($anchor_x,$anchor_y) = $this->imgdata_balls->GetAnchor();
		    break;
	    }

	    $w = imagesx($this->markimg);
	    $h = imagesy($this->markimg);
	    
	    $dw = round($imgscale * $w );
	    $dh = round($imgscale * $h );

	    $dx = round($x-$dw*$anchor_x);
	    $dy = round($y-$dh*$anchor_y);
	    
	    $this->width = max($dx,$dy);
	    
	    $cp = $GLOBALS['copyfunc'] ;
	    $cp($img->img,$this->markimg,$dx,$dy,0,0,$dw,$dh,$w,$h);
	    if( !empty($this->csimtarget) ) {
		$this->csimareas = "<area shape=\"rect\" coords=\"".
		    $dx.','.$dy.','.round($dx+$dw).','.round($dy+$dh).'" '.
		    "href=\"".$this->csimtarget."\"";
		if( !empty($this->csimalt) ) {
		    $tmp=sprintf($this->csimalt,$this->yvalue,$this->xvalue);
		    $this->csimareas .= " alt=\"$tmp\" title=\"$tmp\"";
		}
		$this->csimareas .= ">\n";
	    }
	    
	    // Stroke title
	    $this->title->Align("center","top");
	    $this->title->Stroke($img,$x,$y+round($dh/2));			
	    return;
	}

	$weight = $this->weight;
	$dx=round($width/2,0);
	$dy=round($width/2,0);
	$pts=0;		

	switch( $this->type ) {
	    case MARK_SQUARE:
		$c[]=$x-$dx;$c[]=$y-$dy;
		$c[]=$x+$dx;$c[]=$y-$dy;
		$c[]=$x+$dx;$c[]=$y+$dy;
		$c[]=$x-$dx;$c[]=$y+$dy;
		$c[]=$x-$dx;$c[]=$y-$dy;
		$pts=5;
		break;
	    case MARK_UTRIANGLE:
		++$dx;++$dy;
		$c[]=$x-$dx;$c[]=$y+0.87*$dy;	// tan(60)/2*$dx
		$c[]=$x;$c[]=$y-0.87*$dy;
		$c[]=$x+$dx;$c[]=$y+0.87*$dy;
		$c[]=$x-$dx;$c[]=$y+0.87*$dy;	// tan(60)/2*$dx
		$pts=4;
		break;
	    case MARK_DTRIANGLE:
		++$dx;++$dy;			
		$c[]=$x;$c[]=$y+0.87*$dy;	// tan(60)/2*$dx
		$c[]=$x-$dx;$c[]=$y-0.87*$dy;
		$c[]=$x+$dx;$c[]=$y-0.87*$dy;
		$c[]=$x;$c[]=$y+0.87*$dy;	// tan(60)/2*$dx
		$pts=4;
		break;				
	    case MARK_DIAMOND:
		$c[]=$x;$c[]=$y+$dy;
		$c[]=$x-$dx;$c[]=$y;
		$c[]=$x;$c[]=$y-$dy;
		$c[]=$x+$dx;$c[]=$y;
		$c[]=$x;$c[]=$y+$dy;
		$pts=5;
		break;	
	    case MARK_LEFTTRIANGLE:
		$c[]=$x;$c[]=$y;
		$c[]=$x;$c[]=$y+2*$dy;
		$c[]=$x+$dx*2;$c[]=$y;
		$c[]=$x;$c[]=$y;
		$pts=4;
		break;
	    case MARK_RIGHTTRIANGLE:
		$c[]=$x-$dx*2;$c[]=$y;
		$c[]=$x;$c[]=$y+2*$dy;
		$c[]=$x;$c[]=$y;
		$c[]=$x-$dx*2;$c[]=$y;
		$pts=4;
		break;
	    case MARK_FLASH:
		$dy *= 2;
		$c[]=$x+$dx/2; $c[]=$y-$dy;
		$c[]=$x-$dx+$dx/2; $c[]=$y+$dy*0.7-$dy;
		$c[]=$x+$dx/2; $c[]=$y+$dy*1.3-$dy;
		$c[]=$x-$dx+$dx/2; $c[]=$y+2*$dy-$dy;
		$img->SetLineWeight($weight);
		$img->SetColor($color);					
		$img->Polygon($c);
		$img->SetLineWeight(1);
		$this->AddCSIMPoly($c);
		break;
	}

	if( $pts>0 ) {
	    $this->AddCSIMPoly($c);
	    $img->SetLineWeight($weight);
	    $img->SetColor($fcolor);								
	    $img->FilledPolygon($c);
	    $img->SetColor($color);					
	    $img->Polygon($c);
	    $img->SetLineWeight(1);
	}
	elseif( $this->type==MARK_CIRCLE ) {
	    $img->SetColor($color);					
	    $img->Circle($x,$y,$width);
	    $this->AddCSIMCircle($x,$y,$width);
	}
	elseif( $this->type==MARK_FILLEDCIRCLE ) {
	    $img->SetColor($fcolor);		
	    $img->FilledCircle($x,$y,$width);
	    $img->SetColor($color);	
	    $img->Circle($x,$y,$width+1);
	    $this->AddCSIMCircle($x,$y,$width);
	}
	elseif( $this->type==MARK_CROSS ) {
	    // Oversize by a pixel to match the X
	    $img->SetColor($color);
	    $img->SetLineWeight($weight);
	    $img->Line($x,$y+$dy+1,$x,$y-$dy-1);
	    $img->Line($x-$dx-1,$y,$x+$dx+1,$y);
	    $this->AddCSIMCircle($x,$y,$dx);	    
	}
	elseif( $this->type==MARK_X ) {
	    $img->SetColor($color);
	    $img->SetLineWeight($weight);
	    $img->Line($x+$dx,$y+$dy,$x-$dx,$y-$dy);
	    $img->Line($x-$dx,$y+$dy,$x+$dx,$y-$dy);		
	    $this->AddCSIMCircle($x,$y,$dx+$dy);	    	    
	}			
	elseif( $this->type==MARK_STAR ) {
	    $img->SetColor($color);
	    $img->SetLineWeight($weight);
	    $img->Line($x+$dx,$y+$dy,$x-$dx,$y-$dy);
	    $img->Line($x-$dx,$y+$dy,$x+$dx,$y-$dy);
	    // Oversize by a pixel to match the X				
	    $img->Line($x,$y+$dy+1,$x,$y-$dy-1);
	    $img->Line($x-$dx-1,$y,$x+$dx+1,$y);
	    $this->AddCSIMCircle($x,$y,$dx+$dy);	    
	}
		
	// Stroke title
	$this->title->Align("center","center");
	$this->title->Stroke($img,$x,$y);			
    }
} // Class


?>