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<?php

/*=======================================================================

 // File:        JPGRAPH_CANVTOOLS.PHP

 // Description: Some utilities for text and shape drawing on a canvas

 // Created:     2002-08-23

 // Ver:         $Id: jpgraph_canvtools.php 1857 2009-09-28 14:38:14Z ljp $

 //

 // Copyright (c) Aditus Consulting. All rights reserved.

 //========================================================================

 */

define('CORNER_TOPLEFT',0);

define('CORNER_TOPRIGHT',1);

define('CORNER_BOTTOMRIGHT',2);

define('CORNER_BOTTOMLEFT',3);

//===================================================

// CLASS CanvasScale

// Description: Define a scale for canvas so we

// can abstract away with absolute pixels

//===================================================

class CanvasScale {

    private $g;

    private $w,$h;

    private $ixmin=0,$ixmax=10,$iymin=0,$iymax=10;

    function __construct($graph,$xmin=0,$xmax=10,$ymin=0,$ymax=10) {

        $this->g = $graph;

        $this->w = $graph->img->width;

        $this->h = $graph->img->height;

        $this->ixmin = $xmin;

        $this->ixmax = $xmax;

        $this->iymin = $ymin;

        $this->iymax = $ymax;

    }

    function Set($xmin=0,$xmax=10,$ymin=0,$ymax=10) {

        $this->ixmin = $xmin;

        $this->ixmax = $xmax;

        $this->iymin = $ymin;

        $this->iymax = $ymax;

    }

    function Get() {

        return array($this->ixmin,$this->ixmax,$this->iymin,$this->iymax);

    }

    function Translate($x,$y) {

        $xp = round(($x-$this->ixmin)/($this->ixmax - $this->ixmin) * $this->w);

        $yp = round(($y-$this->iymin)/($this->iymax - $this->iymin) * $this->h);

        return array($xp,$yp);

    }

    function TranslateX($x) {

        $xp = round(($x-$this->ixmin)/($this->ixmax - $this->ixmin) * $this->w);

        return $xp;

    }

    function TranslateY($y) {

        $yp = round(($y-$this->iymin)/($this->iymax - $this->iymin) * $this->h);

        return $yp;

    }

}

//===================================================

// CLASS Shape

// Description: Methods to draw shapes on canvas

//===================================================

class Shape {

    private $img,$scale;

    function __construct($aGraph,$scale) {

        $this->img = $aGraph->img;

        $this->img->SetColor('black');

        $this->scale = $scale;

    }

    function SetColor($aColor) {

        $this->img->SetColor($aColor);

    }

    function Line($x1,$y1,$x2,$y2) {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        list($x2,$y2) = $this->scale->Translate($x2,$y2);

        $this->img->Line($x1,$y1,$x2,$y2);

    }

    function SetLineWeight($aWeight) {

        $this->img->SetLineWeight($aWeight);

    }

    function Polygon($p,$aClosed=false) {

        $n=count($p);

        for($i=0; $i < $n; $i+=2 ) {

            $p[$i]   = $this->scale->TranslateX($p[$i]);

            $p[$i+1] = $this->scale->TranslateY($p[$i+1]);

        }

        $this->img->Polygon($p,$aClosed);

    }

    function FilledPolygon($p) {

        $n=count($p);

        for($i=0; $i < $n; $i+=2 ) {

            $p[$i]   = $this->scale->TranslateX($p[$i]);

            $p[$i+1] = $this->scale->TranslateY($p[$i+1]);

        }

        $this->img->FilledPolygon($p);

    }

    // Draw a bezier curve with defining points in the $aPnts array

    // using $aSteps steps.

    // 0=x0, 1=y0

    // 2=x1, 3=y1

    // 4=x2, 5=y2

    // 6=x3, 7=y3

    function Bezier($p,$aSteps=40) {

        $x0 = $p[0];

        $y0 = $p[1];

        // Calculate coefficients

        $cx = 3*($p[2]-$p[0]);

        $bx = 3*($p[4]-$p[2])-$cx;

        $ax = $p[6]-$p[0]-$cx-$bx;

        $cy = 3*($p[3]-$p[1]);

        $by = 3*($p[5]-$p[3])-$cy;

        $ay = $p[7]-$p[1]-$cy-$by;

        // Step size

        $delta = 1.0/$aSteps;

        $x_old = $x0;

        $y_old = $y0;

        for($t=$delta; $t<=1.0; $t+=$delta) {

            $tt = $t*$t; $ttt=$tt*$t;

            $x  = $ax*$ttt + $bx*$tt + $cx*$t + $x0;

            $y = $ay*$ttt + $by*$tt + $cy*$t + $y0;

            $this->Line($x_old,$y_old,$x,$y);

            $x_old = $x;

            $y_old = $y;

        }

        $this->Line($x_old,$y_old,$p[6],$p[7]);

    }

    function Rectangle($x1,$y1,$x2,$y2) {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        list($x2,$y2)   = $this->scale->Translate($x2,$y2);

        $this->img->Rectangle($x1,$y1,$x2,$y2);

    }

    function FilledRectangle($x1,$y1,$x2,$y2) {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        list($x2,$y2)   = $this->scale->Translate($x2,$y2);

        $this->img->FilledRectangle($x1,$y1,$x2,$y2);

    }

    function Circle($x1,$y1,$r) {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        if( $r >= 0 )

        $r   = $this->scale->TranslateX($r);

        else

        $r = -$r;

        $this->img->Circle($x1,$y1,$r);

    }

    function FilledCircle($x1,$y1,$r) {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        if( $r >= 0 )

        $r   = $this->scale->TranslateX($r);

        else

        $r = -$r;

        $this->img->FilledCircle($x1,$y1,$r);

    }

    function RoundedRectangle($x1,$y1,$x2,$y2,$r=null) {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        list($x2,$y2)   = $this->scale->Translate($x2,$y2);

        if( $r == null )

        $r = 5;

        elseif( $r >= 0 )

        $r = $this->scale->TranslateX($r);

        else

        $r = -$r;

        $this->img->RoundedRectangle($x1,$y1,$x2,$y2,$r);

    }

    function FilledRoundedRectangle($x1,$y1,$x2,$y2,$r=null) {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        list($x2,$y2)   = $this->scale->Translate($x2,$y2);

        if( $r == null )

        $r = 5;

        elseif( $r > 0 )

        $r = $this->scale->TranslateX($r);

        else

        $r = -$r;

        $this->img->FilledRoundedRectangle($x1,$y1,$x2,$y2,$r);

    }

    function ShadowRectangle($x1,$y1,$x2,$y2,$fcolor=false,$shadow_width=null,$shadow_color=array(102,102,102)) {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        list($x2,$y2) = $this->scale->Translate($x2,$y2);

        if( $shadow_width == null )

        $shadow_width=4;

        else

        $shadow_width=$this->scale->TranslateX($shadow_width);

        $this->img->ShadowRectangle($x1,$y1,$x2,$y2,$fcolor,$shadow_width,$shadow_color);

    }

    function SetTextAlign($halign,$valign="bottom") {

        $this->img->SetTextAlign($halign,$valign="bottom");

    }

    function StrokeText($x1,$y1,$txt,$dir=0,$paragraph_align="left") {

        list($x1,$y1) = $this->scale->Translate($x1,$y1);

        $this->img->StrokeText($x1,$y1,$txt,$dir,$paragraph_align);

    }

    // A rounded rectangle where one of the corner has been moved "into" the

    // rectangle 'iw' width and 'ih' height. Corners:

    // 0=Top left, 1=top right, 2=bottom right, 3=bottom left

    function IndentedRectangle($xt,$yt,$w,$h,$iw=0,$ih=0,$aCorner=3,$aFillColor="",$r=4) {

        list($xt,$yt) = $this->scale->Translate($xt,$yt);

        list($w,$h)   = $this->scale->Translate($w,$h);

        list($iw,$ih) = $this->scale->Translate($iw,$ih);

        $xr = $xt + $w - 0;

        $yl = $yt + $h - 0;

        switch( $aCorner ) {

            case 0: // Upper left

                // Bottom line, left &  right arc

                $this->img->Line($xt+$r,$yl,$xr-$r,$yl);

                $this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);

                $this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);

                // Right line, Top right arc

                $this->img->Line($xr,$yt+$r,$xr,$yl-$r);

                $this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);

                // Top line, Top left arc

                $this->img->Line($xt+$iw+$r,$yt,$xr-$r,$yt);

                $this->img->Arc($xt+$iw+$r,$yt+$r,$r*2,$r*2,180,270);

                // Left line

                $this->img->Line($xt,$yt+$ih+$r,$xt,$yl-$r);

                // Indent horizontal, Lower left arc

                $this->img->Line($xt+$r,$yt+$ih,$xt+$iw-$r,$yt+$ih);

                $this->img->Arc($xt+$r,$yt+$ih+$r,$r*2,$r*2,180,270);

                // Indent vertical, Indent arc

                $this->img->Line($xt+$iw,$yt+$r,$xt+$iw,$yt+$ih-$r);

                $this->img->Arc($xt+$iw-$r,$yt+$ih-$r,$r*2,$r*2,0,90);

                if( $aFillColor != '' ) {

                    $bc = $this->img->current_color_name;

                    $this->img->PushColor($aFillColor);

                    $this->img->FillToBorder($xr-$r,$yl-$r,$bc);

                    $this->img->PopColor();

                }

                break;

            case 1: // Upper right

                // Bottom line, left &  right arc

                $this->img->Line($xt+$r,$yl,$xr-$r,$yl);

                $this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);

                $this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);

                // Left line, Top left arc

                $this->img->Line($xt,$yt+$r,$xt,$yl-$r);

                $this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);

                // Top line, Top right arc

                $this->img->Line($xt+$r,$yt,$xr-$iw-$r,$yt);

                $this->img->Arc($xr-$iw-$r,$yt+$r,$r*2,$r*2,270,360);

                // Right line

                $this->img->Line($xr,$yt+$ih+$r,$xr,$yl-$r);

                // Indent horizontal, Lower right arc

                $this->img->Line($xr-$iw+$r,$yt+$ih,$xr-$r,$yt+$ih);

                $this->img->Arc($xr-$r,$yt+$ih+$r,$r*2,$r*2,270,360);

                // Indent vertical, Indent arc

                $this->img->Line($xr-$iw,$yt+$r,$xr-$iw,$yt+$ih-$r);

                $this->img->Arc($xr-$iw+$r,$yt+$ih-$r,$r*2,$r*2,90,180);

                if( $aFillColor != '' ) {

                    $bc = $this->img->current_color_name;

                    $this->img->PushColor($aFillColor);

                    $this->img->FillToBorder($xt+$r,$yl-$r,$bc);

                    $this->img->PopColor();

                }

                break;

            case 2: // Lower right

                // Top line, Top left & Top right arc

                $this->img->Line($xt+$r,$yt,$xr-$r,$yt);

                $this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);

                $this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);

                // Left line, Bottom left arc

                $this->img->Line($xt,$yt+$r,$xt,$yl-$r);

                $this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);

                // Bottom line, Bottom right arc

                $this->img->Line($xt+$r,$yl,$xr-$iw-$r,$yl);

                $this->img->Arc($xr-$iw-$r,$yl-$r,$r*2,$r*2,0,90);

                // Right line

                $this->img->Line($xr,$yt+$r,$xr,$yl-$ih-$r);

                // Indent horizontal, Lower right arc

                $this->img->Line($xr-$r,$yl-$ih,$xr-$iw+$r,$yl-$ih);

                $this->img->Arc($xr-$r,$yl-$ih-$r,$r*2,$r*2,0,90);

                // Indent vertical, Indent arc

                $this->img->Line($xr-$iw,$yl-$r,$xr-$iw,$yl-$ih+$r);

                $this->img->Arc($xr-$iw+$r,$yl-$ih+$r,$r*2,$r*2,180,270);

                if( $aFillColor != '' ) {

                    $bc = $this->img->current_color_name;

                    $this->img->PushColor($aFillColor);

                    $this->img->FillToBorder($xt+$r,$yt+$r,$bc);

                    $this->img->PopColor();

                }

                break;

            case 3: // Lower left

                // Top line, Top left & Top right arc

                $this->img->Line($xt+$r,$yt,$xr-$r,$yt);

                $this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);

                $this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);

                // Right line, Bottom right arc

                $this->img->Line($xr,$yt+$r,$xr,$yl-$r);

                $this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);

                // Bottom line, Bottom left arc

                $this->img->Line($xt+$iw+$r,$yl,$xr-$r,$yl);

                $this->img->Arc($xt+$iw+$r,$yl-$r,$r*2,$r*2,90,180);

                // Left line

                $this->img->Line($xt,$yt+$r,$xt,$yl-$ih-$r);

                // Indent horizontal, Lower left arc

                $this->img->Line($xt+$r,$yl-$ih,$xt+$iw-$r,$yl-$ih);

                $this->img->Arc($xt+$r,$yl-$ih-$r,$r*2,$r*2,90,180);

                // Indent vertical, Indent arc

                $this->img->Line($xt+$iw,$yl-$ih+$r,$xt+$iw,$yl-$r);

                $this->img->Arc($xt+$iw-$r,$yl-$ih+$r,$r*2,$r*2,270,360);

                if( $aFillColor != '' ) {

                    $bc = $this->img->current_color_name;

                    $this->img->PushColor($aFillColor);

                    $this->img->FillToBorder($xr-$r,$yt+$r,$bc);

                    $this->img->PopColor();

                }

                break;

        }

    }

}

//===================================================

// CLASS RectangleText

// Description: Draws a text paragraph inside a

// rounded, possible filled, rectangle.

//===================================================

class CanvasRectangleText {

    private $ix,$iy,$iw,$ih,$ir=4;

    private $iTxt,$iColor='black',$iFillColor='',$iFontColor='black';

    private $iParaAlign='center';

    private $iAutoBoxMargin=5;

    private $iShadowWidth=3,$iShadowColor='';

    function __construct($aTxt='',$xl=0,$yt=0,$w=0,$h=0) {

        $this->iTxt = new Text($aTxt);

        $this->ix = $xl;

        $this->iy = $yt;

        $this->iw = $w;

        $this->ih = $h;

    }

    function SetShadow($aColor='gray',$aWidth=3) {

        $this->iShadowColor = $aColor;

        $this->iShadowWidth = $aWidth;

    }

    function SetFont($FontFam,$aFontStyle,$aFontSize=12) {

        $this->iTxt->SetFont($FontFam,$aFontStyle,$aFontSize);

    }

    function SetTxt($aTxt) {

        $this->iTxt->Set($aTxt);

    }

    function ParagraphAlign($aParaAlign) {

        $this->iParaAlign = $aParaAlign;

    }

    function SetFillColor($aFillColor) {

        $this->iFillColor = $aFillColor;

    }

    function SetAutoMargin($aMargin) {

        $this->iAutoBoxMargin=$aMargin;

    }

    function SetColor($aColor) {

        $this->iColor = $aColor;

    }

    function SetFontColor($aColor) {

        $this->iFontColor = $aColor;

    }

    function SetPos($xl=0,$yt=0,$w=0,$h=0) {

        $this->ix = $xl;

        $this->iy = $yt;

        $this->iw = $w;

        $this->ih = $h;

    }

    function Pos($xl=0,$yt=0,$w=0,$h=0) {

        $this->ix = $xl;

        $this->iy = $yt;

        $this->iw = $w;

        $this->ih = $h;

    }

    function Set($aTxt,$xl,$yt,$w=0,$h=0) {

        $this->iTxt->Set($aTxt);

        $this->ix = $xl;

        $this->iy = $yt;

        $this->iw = $w;

        $this->ih = $h;

    }

    function SetCornerRadius($aRad=5) {

        $this->ir = $aRad;

    }

    function Stroke($aImg,$scale) {

        // If coordinates are specifed as negative this means we should

        // treat them as abolsute (pixels) coordinates

        if( $this->ix > 0 ) {

            $this->ix = $scale->TranslateX($this->ix) ;

        }

        else {

            $this->ix = -$this->ix;

        }

        if( $this->iy > 0 ) {

            $this->iy = $scale->TranslateY($this->iy) ;

        }

        else {

            $this->iy = -$this->iy;

        }

        list($this->iw,$this->ih) = $scale->Translate($this->iw,$this->ih) ;

        if( $this->iw == 0 )

        $this->iw = round($this->iTxt->GetWidth($aImg) + $this->iAutoBoxMargin);

        if( $this->ih == 0 ) {

            $this->ih = round($this->iTxt->GetTextHeight($aImg) + $this->iAutoBoxMargin);

        }

        if( $this->iShadowColor != '' ) {

            $aImg->PushColor($this->iShadowColor);

            $aImg->FilledRoundedRectangle($this->ix+$this->iShadowWidth,

            $this->iy+$this->iShadowWidth,

            $this->ix+$this->iw-1+$this->iShadowWidth,

            $this->iy+$this->ih-1+$this->iShadowWidth,

            $this->ir);

            $aImg->PopColor();

        }

        if( $this->iFillColor != '' ) {

            $aImg->PushColor($this->iFillColor);

            $aImg->FilledRoundedRectangle($this->ix,$this->iy,

            $this->ix+$this->iw-1,

            $this->iy+$this->ih-1,

            $this->ir);

            $aImg->PopColor();

        }

        if( $this->iColor != '' ) {

            $aImg->PushColor($this->iColor);

            $aImg->RoundedRectangle($this->ix,$this->iy,

            $this->ix+$this->iw-1,

            $this->iy+$this->ih-1,

            $this->ir);

            $aImg->PopColor();

        }

        $this->iTxt->Align('center','center');

        $this->iTxt->ParagraphAlign($this->iParaAlign);

        $this->iTxt->SetColor($this->iFontColor);

        $this->iTxt->Stroke($aImg, $this->ix+$this->iw/2, $this->iy+$this->ih/2);

        return array($this->iw, $this->ih);

    }

}

?>