Procedural File: lib_graphs.php

Source Location: /_includes/lib_graphs.php

Classes:

Describes a graph that takes values and then transforms them into a graphical representation as a graph.

Desribes an graph axis. The axis is graded and can extend those marks to a grid if desired. The grades' labels can be altered with callbacks.

GraphFunction

Describes a function that can be displayed in a graph.

Page Details:

A library for creating and displaying graphs. Graphs takes arrays of values and composes images representing the values.

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filesource:	Source Code for this file
license:	GNU Lesser General Public License
version:	$Revision: 1.8 $
author:	Andreas Launila

AXIS_MARKER_SIZE [line 47]

AXIS_MARKER_SIZE = 5

The number of pixels of length that the label marker of the axis should take up.

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private

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AXIS_POINT_LENGTH [line 34]

AXIS_POINT_LENGTH = 10

The length of the point of the arrow representing the axis.

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private

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AXIS_WIDTH [line 40]

AXIS_WIDTH = 4

The width of the arrow that represents the axis.

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private

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GRAPH_PADDING [line 54]

GRAPH_PADDING = 40

The number of pixels of padding that should be between the axes and the graph border.

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private

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drawArrow [line 74]

void drawArrow(
image &$img, integer $x1, integer $y1, integer $x2, mixed $y2, integer $length, integer $width, array $color)

Draws an arrow with specified paramaters on a specified image.

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private

Parameters

image	$img	The image on which the arrow should be drawn.
integer	$x1	The x coordinate (pixels) for the starting point of the arrow in the image.
integer	$y1	The y coordinate (pixels) for the end point of the arrow in the image.
integer	$x2	The x coordinate (pixels) for the end point of the arrow in the image.
integer	$length	The length (in pixels) that the actual arrow point should have.
integer	$width	The width (in pixels) that the arrow should have.
array	$color	The color that the arrow should have, an array with the RGB values representing the color.

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drawStringCentered [line 111]

void drawStringCentered(
image &$img, integer $font, integer $x, integer $y, string $string, array $color)

Draws a specified string with a specified color centered on specified coordinates on a specified image.

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private

Parameters

image	$img	The image that the string should be drawn on.
integer	$font	The font that the drawn string should have.
integer	$x	The x coordinate (pixels) that the drawn string should be centered around in the image.
integer	$y	The y coordinate (pixels) that the drawn string should be centered around in the image.
string	$string	The actual string that should be drawn.
array	$color	The color that the drawn string should have as an array with the RGB values.

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drawStringRightAligned [line 131]

void drawStringRightAligned(
image &$img, integer $font, integer $x, integer $y, string $string, array $color)

Draws a specified string with a specified color aligned right on specified coordinates on a specified image.

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access:

private

Parameters

image	$img	The image that the string should be drawn on.
integer	$font	The font that the drawn string should have.
integer	$x	The x coordinate (pixels) for the rightmost part of string.
integer	$y	The y coordinate (pixels) that the drawn string should be centered around in the image.
string	$string	The actual string that should be drawn.
array	$color	The color that the drawn string should have as an array with the RGB values.

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Documentation generated on Sun, 16 Apr 2006 21:03:31 +0200 by phpDocumentor 1.3.0RC4