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635 lines
19 KiB
PHP
635 lines
19 KiB
PHP
<?php
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//=======================================================================
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// File: JPGRAPH_PLOTBAND.PHP
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// Description: PHP4 Graph Plotting library. Extension module.
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// Created: 2004-02-18
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// Author: Johan Persson (johanp@aditus.nu)
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// Ver: $Id: jpgraph_plotband.php,v 1.1 2006/07/07 13:37:14 powles Exp $
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//
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// Copyright (c) Aditus Consulting. All rights reserved.
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//========================================================================
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// Constants for types of static bands in plot area
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DEFINE("BAND_RDIAG",1); // Right diagonal lines
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DEFINE("BAND_LDIAG",2); // Left diagonal lines
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DEFINE("BAND_SOLID",3); // Solid one color
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DEFINE("BAND_VLINE",4); // Vertical lines
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DEFINE("BAND_HLINE",5); // Horizontal lines
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DEFINE("BAND_3DPLANE",6); // "3D" Plane
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DEFINE("BAND_HVCROSS",7); // Vertical/Hor crosses
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DEFINE("BAND_DIAGCROSS",8); // Diagonal crosses
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// Utility class to hold coordinates for a rectangle
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class Rectangle {
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var $x,$y,$w,$h;
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var $xe, $ye;
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function Rectangle($aX,$aY,$aWidth,$aHeight) {
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$this->x=$aX;
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$this->y=$aY;
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$this->w=$aWidth;
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$this->h=$aHeight;
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$this->xe=$aX+$aWidth-1;
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$this->ye=$aY+$aHeight-1;
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}
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}
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//=====================================================================
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// Class RectPattern
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// Base class for pattern hierarchi that is used to display patterned
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// bands on the graph. Any subclass that doesn't override Stroke()
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// must at least implement method DoPattern(&$aImg) which is responsible
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// for drawing the pattern onto the graph.
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//=====================================================================
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class RectPattern {
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var $color;
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var $weight;
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var $rect=null;
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var $doframe=true;
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var $linespacing; // Line spacing in pixels
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var $iBackgroundColor=-1; // Default is no background fill
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function RectPattern($aColor,$aWeight=1) {
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$this->color = $aColor;
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$this->weight = $aWeight;
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}
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function SetBackground($aBackgroundColor) {
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$this->iBackgroundColor=$aBackgroundColor;
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}
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function SetPos(&$aRect) {
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$this->rect = $aRect;
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}
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function ShowFrame($aShow=true) {
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$this->doframe=$aShow;
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}
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function SetDensity($aDens) {
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if( $aDens < 1 || $aDens > 100 )
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JpGraphError::RaiseL(16001,$aDens);
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//(" Desity for pattern must be between 1 and 100. (You tried $aDens)");
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// 1% corresponds to linespacing=50
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// 100 % corresponds to linespacing 1
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$this->linespacing = floor(((100-$aDens)/100.0)*50)+1;
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}
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function Stroke(&$aImg) {
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if( $this->rect == null )
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JpGraphError::RaiseL(16002);
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//(" No positions specified for pattern.");
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if( !(is_numeric($this->iBackgroundColor) && $this->iBackgroundColor==-1) ) {
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$aImg->SetColor($this->iBackgroundColor);
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$aImg->FilledRectangle($this->rect->x,$this->rect->y,$this->rect->xe,$this->rect->ye);
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}
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$aImg->SetColor($this->color);
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$aImg->SetLineWeight($this->weight);
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// Virtual function implemented by subclass
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$this->DoPattern($aImg);
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// Frame around the pattern area
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if( $this->doframe )
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$aImg->Rectangle($this->rect->x,$this->rect->y,$this->rect->xe,$this->rect->ye);
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}
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}
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//=====================================================================
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// Class RectPatternSolid
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// Implements a solid band
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//=====================================================================
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class RectPatternSolid extends RectPattern {
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function RectPatternSolid($aColor="black",$aWeight=1) {
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parent::RectPattern($aColor,$aWeight);
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}
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function DoPattern(&$aImg) {
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$aImg->SetColor($this->color);
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$aImg->FilledRectangle($this->rect->x,$this->rect->y,
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$this->rect->xe,$this->rect->ye);
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}
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}
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//=====================================================================
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// Class RectPatternHor
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// Implements horizontal line pattern
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//=====================================================================
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class RectPatternHor extends RectPattern {
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function RectPatternHor($aColor="black",$aWeight=1,$aLineSpacing=7) {
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parent::RectPattern($aColor,$aWeight);
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$this->linespacing = $aLineSpacing;
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}
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function DoPattern(&$aImg) {
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$x0 = $this->rect->x;
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$x1 = $this->rect->xe;
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$y = $this->rect->y;
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while( $y < $this->rect->ye ) {
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$aImg->Line($x0,$y,$x1,$y);
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$y += $this->linespacing;
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}
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}
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}
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//=====================================================================
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// Class RectPatternVert
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// Implements vertical line pattern
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//=====================================================================
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class RectPatternVert extends RectPattern {
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var $linespacing=10; // Line spacing in pixels
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function RectPatternVert($aColor="black",$aWeight=1,$aLineSpacing=7) {
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parent::RectPattern($aColor,$aWeight);
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$this->linespacing = $aLineSpacing;
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}
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//--------------------
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// Private methods
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//
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function DoPattern(&$aImg) {
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$x = $this->rect->x;
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$y0 = $this->rect->y;
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$y1 = $this->rect->ye;
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while( $x < $this->rect->xe ) {
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$aImg->Line($x,$y0,$x,$y1);
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$x += $this->linespacing;
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}
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}
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}
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//=====================================================================
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// Class RectPatternRDiag
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// Implements right diagonal pattern
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//=====================================================================
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class RectPatternRDiag extends RectPattern {
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var $linespacing; // Line spacing in pixels
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function RectPatternRDiag($aColor="black",$aWeight=1,$aLineSpacing=12) {
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parent::RectPattern($aColor,$aWeight);
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$this->linespacing = $aLineSpacing;
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}
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function DoPattern(&$aImg) {
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// --------------------
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// | / / / / /|
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// |/ / / / / |
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// | / / / / |
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// --------------------
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$xe = $this->rect->xe;
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$ye = $this->rect->ye;
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$x0 = $this->rect->x + round($this->linespacing/2);
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$y0 = $this->rect->y;
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$x1 = $this->rect->x;
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$y1 = $this->rect->y + round($this->linespacing/2);
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while($x0<=$xe && $y1<=$ye) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$x0 += $this->linespacing;
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$y1 += $this->linespacing;
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}
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if( $xe-$x1 > $ye-$y0 ) {
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// Width larger than height
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$x1 = $this->rect->x + ($y1-$ye);
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$y1 = $ye;
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$y0 = $this->rect->y;
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while( $x0 <= $xe ) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$x0 += $this->linespacing;
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$x1 += $this->linespacing;
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}
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$y0=$this->rect->y + ($x0-$xe);
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$x0=$xe;
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}
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else {
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// Height larger than width
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$diff = $x0-$xe;
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$y0 = $diff+$this->rect->y;
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$x0 = $xe;
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$x1 = $this->rect->x;
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while( $y1 <= $ye ) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$y1 += $this->linespacing;
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$y0 += $this->linespacing;
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}
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$diff = $y1-$ye;
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$y1 = $ye;
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$x1 = $diff + $this->rect->x;
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}
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while( $y0 <= $ye ) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$y0 += $this->linespacing;
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$x1 += $this->linespacing;
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}
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}
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}
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//=====================================================================
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// Class RectPatternLDiag
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// Implements left diagonal pattern
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//=====================================================================
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class RectPatternLDiag extends RectPattern {
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var $linespacing; // Line spacing in pixels
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function RectPatternLDiag($aColor="black",$aWeight=1,$aLineSpacing=12) {
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$this->linespacing = $aLineSpacing;
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parent::RectPattern($aColor,$aWeight);
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}
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function DoPattern(&$aImg) {
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// --------------------
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// |\ \ \ \ \ |
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// | \ \ \ \ \|
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// | \ \ \ \ |
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// |------------------|
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$xe = $this->rect->xe;
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$ye = $this->rect->ye;
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$x0 = $this->rect->x + round($this->linespacing/2);
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$y0 = $this->rect->ye;
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$x1 = $this->rect->x;
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$y1 = $this->rect->ye - round($this->linespacing/2);
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while($x0<=$xe && $y1>=$this->rect->y) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$x0 += $this->linespacing;
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$y1 -= $this->linespacing;
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}
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if( $xe-$x1 > $ye-$this->rect->y ) {
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// Width larger than height
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$x1 = $this->rect->x + ($this->rect->y-$y1);
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$y0=$ye; $y1=$this->rect->y;
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while( $x0 <= $xe ) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$x0 += $this->linespacing;
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$x1 += $this->linespacing;
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}
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$y0=$this->rect->ye - ($x0-$xe);
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$x0=$xe;
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}
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else {
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// Height larger than width
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$diff = $x0-$xe;
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$y0 = $ye-$diff;
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$x0 = $xe;
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while( $y1 >= $this->rect->y ) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$y0 -= $this->linespacing;
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$y1 -= $this->linespacing;
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}
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$diff = $this->rect->y - $y1;
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$x1 = $this->rect->x + $diff;
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$y1 = $this->rect->y;
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}
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while( $y0 >= $this->rect->y ) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$y0 -= $this->linespacing;
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$x1 += $this->linespacing;
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}
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}
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}
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//=====================================================================
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// Class RectPattern3DPlane
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// Implements "3D" plane pattern
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//=====================================================================
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class RectPattern3DPlane extends RectPattern {
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var $alpha=50; // Parameter that specifies the distance
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// to "simulated" horizon in pixel from the
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// top of the band. Specifies how fast the lines
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// converge.
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function RectPattern3DPlane($aColor="black",$aWeight=1) {
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parent::RectPattern($aColor,$aWeight);
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$this->SetDensity(10); // Slightly larger default
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}
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function SetHorizon($aHorizon) {
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$this->alpha=$aHorizon;
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}
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function DoPattern(&$aImg) {
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// "Fake" a nice 3D grid-effect.
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$x0 = $this->rect->x + $this->rect->w/2;
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$y0 = $this->rect->y;
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$x1 = $x0;
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$y1 = $this->rect->ye;
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$x0_right = $x0;
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$x1_right = $x1;
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// BTW "apa" means monkey in Swedish but is really a shortform for
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// "alpha+a" which was the labels I used on paper when I derived the
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// geometric to get the 3D perspective right.
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// $apa is the height of the bounding rectangle plus the distance to the
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// artifical horizon (alpha)
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$apa = $this->rect->h + $this->alpha;
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// Three cases and three loops
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// 1) The endpoint of the line ends on the bottom line
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// 2) The endpoint ends on the side
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// 3) Horizontal lines
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// Endpoint falls on bottom line
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$middle=$this->rect->x + $this->rect->w/2;
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$dist=$this->linespacing;
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$factor=$this->alpha /($apa);
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while($x1>$this->rect->x) {
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$aImg->Line($x0,$y0,$x1,$y1);
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$aImg->Line($x0_right,$y0,$x1_right,$y1);
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$x1 = $middle - $dist;
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$x0 = $middle - $dist * $factor;
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$x1_right = $middle + $dist;
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$x0_right = $middle + $dist * $factor;
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$dist += $this->linespacing;
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}
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// Endpoint falls on sides
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$dist -= $this->linespacing;
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$d=$this->rect->w/2;
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$c = $apa - $d*$apa/$dist;
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while( $x0>$this->rect->x ) {
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$aImg->Line($x0,$y0,$this->rect->x,$this->rect->ye-$c);
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$aImg->Line($x0_right,$y0,$this->rect->xe,$this->rect->ye-$c);
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$dist += $this->linespacing;
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$x0 = $middle - $dist * $factor;
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$x1 = $middle - $dist;
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$x0_right = $middle + $dist * $factor;
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$c = $apa - $d*$apa/$dist;
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}
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// Horizontal lines
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// They need some serious consideration since they are a function
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// of perspective depth (alpha) and density (linespacing)
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$x0=$this->rect->x;
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$x1=$this->rect->xe;
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$y=$this->rect->ye;
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// The first line is drawn directly. Makes the loop below slightly
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// more readable.
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$aImg->Line($x0,$y,$x1,$y);
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$hls = $this->linespacing;
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// A correction factor for vertical "brick" line spacing to account for
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// a) the difference in number of pixels hor vs vert
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// b) visual apperance to make the first layer of "bricks" look more
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// square.
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$vls = $this->linespacing*0.6;
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$ds = $hls*($apa-$vls)/$apa;
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// Get the slope for the "perspective line" going from bottom right
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// corner to top left corner of the "first" brick.
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// Uncomment the following lines if you want to get a visual understanding
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// of what this helpline does. BTW this mimics the way you would get the
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// perspective right when drawing on paper.
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/*
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$x0 = $middle;
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$y0 = $this->rect->ye;
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$len=floor(($this->rect->ye-$this->rect->y)/$vls);
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$x1 = $middle+round($len*$ds);
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$y1 = $this->rect->ye-$len*$vls;
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$aImg->PushColor("red");
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$aImg->Line($x0,$y0,$x1,$y1);
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$aImg->PopColor();
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*/
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$y -= $vls;
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$k=($this->rect->ye-($this->rect->ye-$vls))/($middle-($middle-$ds));
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$dist = $hls;
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while( $y>$this->rect->y ) {
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$aImg->Line($this->rect->x,$y,$this->rect->xe,$y);
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$adj = $k*$dist/(1+$dist*$k/$apa);
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if( $adj < 2 ) $adj=1;
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$y = $this->rect->ye - round($adj);
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$dist += $hls;
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}
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}
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}
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//=====================================================================
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// Class RectPatternCross
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// Vert/Hor crosses
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//=====================================================================
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class RectPatternCross extends RectPattern {
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var $vert=null;
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var $hor=null;
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function RectPatternCross($aColor="black",$aWeight=1) {
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parent::RectPattern($aColor,$aWeight);
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$this->vert = new RectPatternVert($aColor,$aWeight);
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$this->hor = new RectPatternHor($aColor,$aWeight);
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}
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function SetOrder($aDepth) {
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$this->vert->SetOrder($aDepth);
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$this->hor->SetOrder($aDepth);
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}
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function SetPos(&$aRect) {
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parent::SetPos($aRect);
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$this->vert->SetPos($aRect);
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$this->hor->SetPos($aRect);
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}
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function SetDensity($aDens) {
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$this->vert->SetDensity($aDens);
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$this->hor->SetDensity($aDens);
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}
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function DoPattern(&$aImg) {
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$this->vert->DoPattern($aImg);
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$this->hor->DoPattern($aImg);
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}
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}
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//=====================================================================
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// Class RectPatternDiagCross
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// Vert/Hor crosses
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//=====================================================================
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class RectPatternDiagCross extends RectPattern {
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var $left=null;
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var $right=null;
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function RectPatternDiagCross($aColor="black",$aWeight=1) {
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parent::RectPattern($aColor,$aWeight);
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$this->right = new RectPatternRDiag($aColor,$aWeight);
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$this->left = new RectPatternLDiag($aColor,$aWeight);
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}
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function SetOrder($aDepth) {
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$this->left->SetOrder($aDepth);
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$this->right->SetOrder($aDepth);
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}
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function SetPos(&$aRect) {
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parent::SetPos($aRect);
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$this->left->SetPos($aRect);
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$this->right->SetPos($aRect);
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}
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function SetDensity($aDens) {
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$this->left->SetDensity($aDens);
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$this->right->SetDensity($aDens);
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}
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function DoPattern(&$aImg) {
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$this->left->DoPattern($aImg);
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$this->right->DoPattern($aImg);
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}
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}
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//=====================================================================
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// Class RectPatternFactory
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// Factory class for rectangular pattern
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//=====================================================================
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class RectPatternFactory {
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function RectPatternFactory() {
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// Empty
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}
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function Create($aPattern,$aColor,$aWeight=1) {
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switch($aPattern) {
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case BAND_RDIAG:
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$obj = new RectPatternRDiag($aColor,$aWeight);
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break;
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case BAND_LDIAG:
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$obj = new RectPatternLDiag($aColor,$aWeight);
|
|
break;
|
|
case BAND_SOLID:
|
|
$obj = new RectPatternSolid($aColor,$aWeight);
|
|
break;
|
|
case BAND_VLINE:
|
|
$obj = new RectPatternVert($aColor,$aWeight);
|
|
break;
|
|
case BAND_HLINE:
|
|
$obj = new RectPatternHor($aColor,$aWeight);
|
|
break;
|
|
case BAND_3DPLANE:
|
|
$obj = new RectPattern3DPlane($aColor,$aWeight);
|
|
break;
|
|
case BAND_HVCROSS:
|
|
$obj = new RectPatternCross($aColor,$aWeight);
|
|
break;
|
|
case BAND_DIAGCROSS:
|
|
$obj = new RectPatternDiagCross($aColor,$aWeight);
|
|
break;
|
|
default:
|
|
JpGraphError::RaiseL(16003,$aPattern);
|
|
//(" Unknown pattern specification ($aPattern)");
|
|
}
|
|
return $obj;
|
|
}
|
|
}
|
|
|
|
|
|
//=====================================================================
|
|
// Class PlotBand
|
|
// Factory class which is used by the client.
|
|
// It is responsible for factoring the corresponding pattern
|
|
// concrete class.
|
|
//=====================================================================
|
|
class PlotBand {
|
|
var $prect=null;
|
|
var $depth;
|
|
var $dir, $min, $max;
|
|
|
|
function PlotBand($aDir,$aPattern,$aMin,$aMax,$aColor="black",$aWeight=1,$aDepth=DEPTH_BACK) {
|
|
$f = new RectPatternFactory();
|
|
$this->prect = $f->Create($aPattern,$aColor,$aWeight);
|
|
if( is_numeric($aMin) && is_numeric($aMax) && ($aMin > $aMax) )
|
|
JpGraphError::RaiseL(16004);
|
|
//('Min value for plotband is larger than specified max value. Please correct.');
|
|
$this->dir = $aDir;
|
|
$this->min = $aMin;
|
|
$this->max = $aMax;
|
|
$this->depth=$aDepth;
|
|
}
|
|
|
|
// Set position. aRect contains absolute image coordinates
|
|
function SetPos(&$aRect) {
|
|
assert( $this->prect != null ) ;
|
|
$this->prect->SetPos($aRect);
|
|
}
|
|
|
|
function ShowFrame($aFlag=true) {
|
|
$this->prect->ShowFrame($aFlag);
|
|
}
|
|
|
|
// Set z-order. In front of pplot or in the back
|
|
function SetOrder($aDepth) {
|
|
$this->depth=$aDepth;
|
|
}
|
|
|
|
function SetDensity($aDens) {
|
|
$this->prect->SetDensity($aDens);
|
|
}
|
|
|
|
function GetDir() {
|
|
return $this->dir;
|
|
}
|
|
|
|
function GetMin() {
|
|
return $this->min;
|
|
}
|
|
|
|
function GetMax() {
|
|
return $this->max;
|
|
}
|
|
|
|
// Display band
|
|
function Stroke(&$aImg,&$aXScale,&$aYScale) {
|
|
assert( $this->prect != null ) ;
|
|
if( $this->dir == HORIZONTAL ) {
|
|
if( $this->min === 'min' ) $this->min = $aYScale->GetMinVal();
|
|
if( $this->max === 'max' ) $this->max = $aYScale->GetMaxVal();
|
|
|
|
// Only draw the bar if it actually appears in the range
|
|
if ($this->min < $aYScale->GetMaxVal() && $this->max > $aYScale->GetMinVal()) {
|
|
|
|
// Trucate to limit of axis
|
|
$this->min = max($this->min, $aYScale->GetMinVal());
|
|
$this->max = min($this->max, $aYScale->GetMaxVal());
|
|
|
|
$x=$aXScale->scale_abs[0];
|
|
$y=$aYScale->Translate($this->max);
|
|
$width=$aXScale->scale_abs[1]-$aXScale->scale_abs[0]+1;
|
|
$height=abs($y-$aYScale->Translate($this->min))+1;
|
|
$this->prect->SetPos(new Rectangle($x,$y,$width,$height));
|
|
$this->prect->Stroke($aImg);
|
|
}
|
|
}
|
|
else { // VERTICAL
|
|
if( $this->min === 'min' ) $this->min = $aXScale->GetMinVal();
|
|
if( $this->max === 'max' ) $this->max = $aXScale->GetMaxVal();
|
|
|
|
// Only draw the bar if it actually appears in the range
|
|
if ($this->min < $aXScale->GetMaxVal() && $this->max > $aXScale->GetMinVal()) {
|
|
|
|
// Trucate to limit of axis
|
|
$this->min = max($this->min, $aXScale->GetMinVal());
|
|
$this->max = min($this->max, $aXScale->GetMaxVal());
|
|
|
|
$y=$aYScale->scale_abs[1];
|
|
$x=$aXScale->Translate($this->min);
|
|
$height=abs($aYScale->scale_abs[1]-$aYScale->scale_abs[0]);
|
|
$width=abs($x-$aXScale->Translate($this->max));
|
|
$this->prect->SetPos(new Rectangle($x,$y,$width,$height));
|
|
$this->prect->Stroke($aImg);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
?>
|