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https://github.com/fsr/eseeva
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117 lines
3.2 KiB
PHP
117 lines
3.2 KiB
PHP
<?php
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//============================================================================
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// Name : chartLib.php
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// Author : Lucas Woltmann
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// Version : 1.0
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// Date : 08-2013
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// Description : Provides functions for creating beautiful and astonishing charts
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//============================================================================
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function DrawCoords($image, $XLength, $YLength, $values)
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{
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$width = ImageSX($image);
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$height = ImageSY($image);
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//scale offset for each axis, minimize Xoffset for small values of Xlength
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$Xoffset = 0.8*($width/$XLength);
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$Yoffset = 0.8*($height/$YLength);
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if($Xoffset>150)
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{
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$Xoffset=$Xoffset/10;
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}
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//lines out of image
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if($width < ($XLength * $Xoffset) || $height < ($YLength * $Yoffset))
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{
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echo "lines out of boundaries";
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}
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$black = ImageColorAllocate($image, 0, 0, 0);
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$left = ($width - $XLength * $Xoffset)/2;
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$right = $width-$left;
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$upper = ($YLength * $Yoffset)+$Yoffset;
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$YSpace = ($upper - $Yoffset)/$YLength;
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$XSpace = ($right - $left)/$XLength;
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//draws X-Axis
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ImageLine($image, $left, $upper, $right, $upper, $black);
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//draws y-Axis with Yoffset as upper margin
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ImageLine($image, $left, $upper,$left, $Yoffset,$black);
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//draws arrows
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ImageLine($image, $right-5, $upper-5,$right,$upper,$black);
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ImageLine($image, $right-5, $upper+5,$right,$upper,$black);
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ImageLine($image, $left, $Yoffset,$left+5,$Yoffset+5,$black);
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ImageLine($image, $left, $Yoffset,$left-5,$Yoffset+5,$black);
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//draws lines for measurement at the y-Axis
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for($i=1;$i<$YLength;$i++)
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{
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ImageLine($image, $left-4, $upper-$YSpace*$i ,$left+4, $upper-$YSpace*$i,$black);
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}
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//same for the x-Axis
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for($j=1;$j<$XLength;$j++)
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{
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ImageLine($image, $left+$XSpace*$j, $upper-4 ,$left+$XSpace*$j, $upper+4,$black);
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}
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//caption for x-Axis
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$index=0;
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while($index < $XLength)
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{
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if($index % 5 == 0)
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{
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ImageString($image, 4, $left+($XSpace*$index)-($Xoffset/4), $upper+($Yoffset/3), $index, $black);
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}
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$index++;
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}
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//caption for y-Axis
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$index=0;
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while($index < count($values))
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{
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ImageString($image, 4, $left-(0*$Xoffset+30), $upper-$YSpace*$index-($Yoffset*0.7), $values[$index], $black);
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$index++;
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}
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}
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function DrawBar($image, $length, $maxOfX ,$position, $maxOfY, $value, $color)
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{
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$imgWidth = ImageSX($image);
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$imgHeight = ImageSY($image);
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//scale offset for each axis and minimize Xoffset for small values of maxOfX
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$Xoffset = 0.8*($imgWidth/$maxOfX);
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$Yoffset = 0.8*($imgHeight/$maxOfY);
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if($Xoffset>150)
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{
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$Xoffset=$Xoffset/10;
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}
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$length = $length*$Xoffset;
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$black = ImageColorAllocate($image, 0, 0, 0);
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$left = ($imgWidth - $maxOfX * $Xoffset)/2;
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$upper = /*($maxOfY*$Yoffset) +*/ $Yoffset + ($position*$Yoffset);
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$right = $left+$length;
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ImageFilledRectangle($image, $left, $upper, $right, $upper-$Yoffset, $color);
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ImageString($image, 4, $right+($Xoffset/3), $upper-$Yoffset*0.7, $value, $black);
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}
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function CreateImage($width, $height)
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{
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$image = ImageCreate($width, $height);
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$white = ImageColorAllocateAlpha($image, 255, 255, 255, 127);
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ImageFill($image, 0, 0, $white);
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ImageSaveAlpha($image, TRUE);
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return $image;
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}
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?>
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