jpgraph_bar.php

来自「eGroupWare is a multi-user, web-based gr」· PHP 代码 · 共 743 行 · 第 1/2 页

<?php
/*=======================================================================
// File:	JPGRAPH_BAR.PHP
// Description:	Bar plot extension for JpGraph
// Created: 	2001-01-08
// Author:	Johan Persson ([e-mail])
// Ver:		$Id: jpgraph_bar.php,v 1.5 2004/06/01 10:38:37 lkneschke Exp $
//
// License:	This code is released under QPL
// Copyright (C) 2001 Johan Persson
//========================================================================
*/

//===================================================
// CLASS Gradient
// Description: Handles gradient fills. This is to be
// considered a "friend" class of Class Image. The
// Gradient takes care of production a gradient fill for
// the bars.
//===================================================
class Gradient {
    var $img=null;
//---------------
// CONSTRUCTOR
    function Gradient(&$img) {
	$this->img = $img;
    }

//---------------
// PUBLIC METHODS	
    // Produce a gradient filled rectangle with a smooth transition between
    // two colors.
    // ($xl,$yt) 	Top left corner
    // ($xr,$yb)	Bottom right
    // $from_color	Starting color in gradient
    // $to_color	End color in the gradient
    // $style		Which way is the gradient oriented?
    function FilledRectangle($xl,$yt,$xr,$yb,$from_color,$to_color,$style=1) {
	switch( $style ) {	
	    case 1:  // HORIZONTAL
		$steps = abs($xr-$xl);
	    $delta = $xr>=$xl ? 1 : -1;
	    $this->GetColArray($from_color,$to_color,$steps,$colors);
	    for( $i=0, $x=$xl; $i<$steps; ++$i ) {
		$this->img->current_color = $colors[$i];
		$this->img->Line($x,$yt,$x,$yb);
		$x += $delta;
	    }
	    break;

	    case 2: // VERTICAL
		$steps = abs($yb-$yt);
	    $delta = $yb>=$yt ? 1 : -1;
	    $this->GetColArray($from_color,$to_color,$steps,$colors);
	    for($i=0,$y=$yt; $i<$steps; ++$i) {
		$this->img->current_color = $colors[$i];
		$this->img->Line($xl,$y,$xr,$y);
		$y += $delta;
	    }
	    break;

	    case 3: // VERTICAL FROM MIDDLE
		$steps = abs($yb-$yt)/2;
	    $delta = $yb>=$yt ? 1 : -1;
	    $this->GetColArray($from_color,$to_color,$steps,$colors);
	    for($y=$yt, $i=0; $i<$steps;  ++$i) {
		$this->img->current_color = $colors[$i];
		$this->img->Line($xl,$y,$xr,$y);
		$y += $delta;
	    }
	    --$i;
	    for($j=0; $j<$steps; ++$j, --$i) {
		$this->img->current_color = $colors[$i];
		$this->img->Line($xl,$y,$xr,$y);
		$y += $delta;
	    }
	    $this->img->Line($xl,$y,$xr,$y);
	    break;

	    case 4: // HORIZONTAL FROM MIDDLE
		$steps = abs($xr-$xl)/2;
	    $delta = $xr>=$xl ? 1 : -1;
	    $this->GetColArray($from_color,$to_color,$steps,$colors);
	    for($x=$xl, $i=0; $i<$steps; ++$i) {
		$this->img->current_color = $colors[$i];
		$this->img->Line($x,$yb,$x,$yt);
		$x += $delta;
	    }
	    --$i;
	    for($j=0; $j<$steps; ++$j, --$i) {
		$this->img->current_color = $colors[$i];
		$this->img->Line($x,$yb,$x,$yt);
		$x += $delta;
	    }
	    $this->img->Line($x,$yb,$x,$yt);		
	    break;

	    case 6: // HORIZONTAL WIDER MIDDLE
		$steps = abs($xr-$xl)/3;
	    $delta = $xr>=$xl ? 1 : -1;
	    $this->GetColArray($from_color,$to_color,$steps,$colors);
	    for($x=$xl, $i=0; $i<$steps; ++$i) {
		$this->img->current_color = $colors[$i];
		$this->img->Line($x,$yb,$x,$yt);
		$x += $delta;
	    }
	    --$i;
	    $this->img->current_color = $colors[$i];
	    for($j=0; $j< $steps; ++$j) {
		$this->img->Line($x,$yb,$x,$yt);
		$x += $delta;
	    }

	    for($j=0; $j<$steps; ++$j, --$i) {
		$this->img->current_color = $colors[$i];				
		$this->img->Line($x,$yb,$x,$yt);	
		$x += $delta;
	    }				
	    break;

	    case 7: // VERTICAL WIDER MIDDLE
		$steps = abs($yb-$yt)/3;
	    $delta = $yb>=$yt? 1 : -1;
	    $this->GetColArray($from_color,$to_color,$steps,$colors);
	    for($y=$yt, $i=0; $i<$steps;  ++$i) {
		$this->img->current_color = $colors[$i];
		$this->img->Line($xl,$y,$xr,$y);
		$y += $delta;
	    }
	    --$i;
	    $this->img->current_color = $colors[$i];
	    for($j=0; $j< $steps; ++$j) {
		$this->img->Line($xl,$y,$xr,$y);
		$y += $delta;
	    }
	    for($j=0; $j<$steps; ++$j, --$i) {
		$this->img->current_color = $colors[$i];				
		$this->img->Line($xl,$y,$xr,$y);
		$y += $delta;
	    }				
	    break;

	    case 5: // Rectangle
		$steps = floor(min(($yb-$yt)+1,($xr-$xl)+1)/2);	
	    $this->GetColArray($from_color,$to_color,$steps,$colors);
	    $dx = ($xr-$xl)/2;
	    $dy = ($yb-$yt)/2;
	    $x=$xl;$y=$yt;$x2=$xr;$y2=$yb;
	    for($x=$xl, $i=0; $x<$xl+$dx && $y<$yt+$dy ; ++$x, ++$y, --$x2, --$y2, ++$i) {
		assert($i<count($colors));
		$this->img->current_color = $colors[$i];			
		$this->img->Rectangle($x,$y,$x2,$y2);
	    }
	    $this->img->Line($x,$y,$x2,$y2);
	    break;

	    default:
		die("JpGraph Error: Unknown gradient style (=$style).");
		break;
	}
    }

//---------------
// PRIVATE METHODS	
    // Add to the image color map the necessary colors to do the transition
    // between the two colors using $numcolors intermediate colors
    function GetColArray($from_color,$to_color,$arr_size,&$colors,$numcols=100) {
	if( $arr_size==0 ) return;
	// If color is give as text get it's corresponding r,g,b values
	$from_color = $this->img->rgb->Color($from_color);
	$to_color = $this->img->rgb->Color($to_color);
		
	$rdelta=($to_color[0]-$from_color[0])/$numcols;
	$gdelta=($to_color[1]-$from_color[1])/$numcols;
	$bdelta=($to_color[2]-$from_color[2])/$numcols;
	$stepspercolor	= $numcols/$arr_size;
	$prevcolnum	= -1;
	for ($i=0; $i<$arr_size; ++$i) {
	    $colnum	= floor($stepspercolor*$i);
	    if ( $colnum == $prevcolnum ) 
		$colors[$i]	= $colidx;
	    else {
		$r = floor($from_color[0] + $colnum*$rdelta);
		$g = floor($from_color[1] + $colnum*$gdelta);
		$b = floor($from_color[2] + $colnum*$bdelta);
		$colidx = $this->img->rgb->Allocate(sprintf("#%02x%02x%02x",$r,$g,$b));
		$colors[$i]	= $colidx;
	    }
	    $prevcolnum = $colnum;
	}
    }	
} // Class


//===================================================
// CLASS BarPlot
// Description: Main code to produce a bar plot 
//===================================================
class BarPlot extends Plot {
    var $width=0.4; // in percent of major ticks
    var $abswidth=-1; // Width in absolute pixels
    var $fill_color="lightblue"; // Default is to fill with light blue
    var $ybase=0; // Bars start at 0 
    var $align="left";
    var $grad=false,$grad_style=1;
    var $grad_fromcolor=array(50,50,200),$grad_tocolor=array(255,255,255);
    var $bar_shadow=false;
    var $bar_shadow_color="black";
    var $bar_shadow_hsize=3,$bar_shadow_vsize=3;	
    var $show_value=false,$show_value_format="%d",$show_value_angle=0;
    var $show_value_ff=FF_FONT1,$show_value_fs=FS_NORMAL,$show_value_fsize=12;
    var $show_value_color="black",$show_value_margin=3;
	
//---------------
// CONSTRUCTOR
    function BarPlot(&$datay,$datax=false) {
	$this->Plot($datay,$datax);		
	++$this->numpoints;
    }

//---------------
// PUBLIC METHODS	
	
    // Set a drop shadow for the bar (or rather an "up-right" shadow)
    function SetShadow($color="black",$hsize=3,$vsize=3) {
	$this->bar_shadow=true;
	$this->bar_shadow_color=$color;
	$this->bar_shadow_vsize=$vsize;
	$this->bar_shadow_hsize=$hsize;
		
	// Adjust the value margin to compensate for shadow
	$this->show_value_margin += $vsize;
    }
	
    // Display the value of the bar at the top of bar
    function ShowValue($f=true) {
	$this->show_value = $f;	
    }
	
    function SetValueFormat($format="%d",$angle=0) {
	$this->show_value_format = $format;
	$this->show_value_angle = $angle;
    }
	
    function SetValueFont($ff=FF_FONT1,$fs=FS_NORMAL,$size=10) {
	$this->show_value_ff=$ff;
	$this->show_value_fs=$fs;
	$this->show_value_fsize=$size;
    }
	
    function SetValueColor($color) {
	$this->show_value_color=$color;
    }
	
    function SetValueMargin($m) {
	$this->show_value_margin=$m;
    }

    function SetYStart($y) {	
	die("JpGraph Error: Deprecated function SetYStart. Use SetYMin() instead.");
    }
	
    // DEPRECATED use SetYBase instead
    function SetYMin($y) {
	$this->ybase=$y;
    }

    //
    function SetYBase($y) {
	$this->ybase=$y;
    }
	
    function Legend(&$graph) {
	if( $this->fill_color && $this->legend!="" ) {
	    if( is_array($this->fill_color) )
		$graph->legend->Add($this->legend,$this->fill_color[0]);		
	    else
		$graph->legend->Add($this->legend,$this->fill_color);		
	}
    }

    // Gets called before any axis are stroked
    function PreStrokeAdjust(&$graph) {
	parent::PreStrokeAdjust($graph);
		
	// For a "text" X-axis scale we will adjust the
	// display of the bars a little bit.
	if( substr($graph->axtype,0,3)=="tex" ) {
	    // Position the ticks between the bars
	    $graph->xaxis->scale->ticks->SetXLabelOffset(0.5,0);
		
	    // Position the labels under each bar in the middle of the
	    // major steps.
	    $graph->SetTextScaleOff(0.5-$this->width/2);						
	}
	else {
	    // We only set an absolute width for linear and int scale
	    // for text scale the width will be set to a fraction of
	    // the majstep width.
	    if( $this->abswidth == -1 ) // Not set
				// set width to a visuable sensible default
		$this->abswidth = $graph->img->plotwidth/(2*count($this->coords[0]));
	}
    }

    function Min() {
	$m = parent::Min();
	if( $m[1] >= $this->ybase )
	    $m[1] = $this->ybase;
	return $m;	
    }

    function Max() {
	$m = parent::Max();
	if( $m[1] <= $this->ybase )
	    $m[1] = $this->ybase;
	return $m;	
    }	
	
    // Specify width as fractions of the major stepo size
    function SetWidth($w) {
	assert($w > 0 && $w <= 1.0);
	$this->width=$w;
    }
	
    // Specify width in absolute pixels. If specified this
    // overrides SetWidth()
    function SetAbsWidth($w) {
	$this->abswidth=$w;
    }
		
    function SetAlign($a) {
	$this->align=$a;
    }
	
    function SetNoFill() {
	$this->grad = false;
	$this->fill_color=false;
    }
		
    function SetFillColor($c) {
	$this->fill_color=$c;
    }
	
    function SetFillGradient($from_color,$to_color,$style) {
	$this->grad=true;
	$this->grad_fromcolor=$from_color;
	$this->grad_tocolor=$to_color;
	$this->grad_style=$style;
    }
	
    function Stroke(&$img,&$xscale,&$yscale) { 
		
	$numpoints = count($this->coords[0]);
	if( isset($this->coords[1]) ) {
	    if( count($this->coords[1])!=$numpoints )
		die("JpGraph Error: Number of X and Y points are not equal.<br>
					Number of X-points:".count($this->coords[1])."<br>
					Number of Y-points:$numpoints");
	    else
		$exist_x = true;
	}
	else 
	    $exist_x = false;
		
		
	$numbars=count($this->coords[0]);
	if( $yscale->scale[0] >= 0 )
	    $zp=$yscale->scale_abs[0]; 
	else
	    $zp=$yscale->Translate(0.0);