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[Weberp-cvs] SF.net SVN: web-erp:[3343] trunk
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From: <tim...@us...> - 2010-02-12 10:57:50
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Revision: 3343
http://web-erp.svn.sourceforge.net/web-erp/?rev=3343&view=rev
Author: tim_schofield
Date: 2010-02-12 10:57:39 +0000 (Fri, 12 Feb 2010)
Log Message:
-----------
Update phplot to the laterst version and remove reference to deprecated function eregi()
Modified Paths:
--------------
trunk/doc/Change.log.html
trunk/includes/phplot/phplot.php
trunk/includes/phplot/phplot_data.php
trunk/includes/phplot/rgb.inc.php
Added Paths:
-----------
trunk/includes/phplot/COPYING
trunk/includes/phplot/ChangeLog
trunk/includes/phplot/NEWS.txt
trunk/includes/phplot/README.txt
Modified: trunk/doc/Change.log.html
===================================================================
--- trunk/doc/Change.log.html 2010-02-12 10:48:11 UTC (rev 3342)
+++ trunk/doc/Change.log.html 2010-02-12 10:57:39 UTC (rev 3343)
@@ -1,5 +1,6 @@
<p><font SIZE=4 COLOR=BLUE><b>webERP Change Log</b></font></p>
<p></p>
+<p>12/02/10 Tim: Update phplot to the laterst version and remove reference to deprecated function eregi()</p>
<p>12/02/10 Tim: Update php-gettext to the laterst version and remove reference to deprecated function eregi()</p>
<p>12/02/10 Tim: Save.php - Replace deprecated function eregi</p>
<p>08/02/10 Tim: Change the default font family to Arial</p>
Added: trunk/includes/phplot/COPYING
===================================================================
--- trunk/includes/phplot/COPYING (rev 0)
+++ trunk/includes/phplot/COPYING 2010-02-12 10:57:39 UTC (rev 3343)
@@ -0,0 +1,504 @@
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Added: trunk/includes/phplot/ChangeLog
===================================================================
--- trunk/includes/phplot/ChangeLog (rev 0)
+++ trunk/includes/phplot/ChangeLog 2010-02-12 10:57:39 UTC (rev 3343)
@@ -0,0 +1,848 @@
+This is the Change Log for PHPlot.
+The project home page is http://sourceforge.net/projects/phplot/
+-----------------------------------------------------------------------------
+
+2009-12-24 (lbayuk) ===== Released as 5.1.0 =====
+
+2009-12-18
+ * Change for bug 1795971 "Fix default data colors":
+ The default Data Color and Error Bar Color arrays now have 16
+ different colors, no duplicates, and nothing so light that it
+ is invisible.
+ Using '' or False as the argument to SetDataColors, SetErrorBarColors,
+ and SetDataBorderColors now re-initializes the map to the defaults.
+ This was previously undocumented, and in some cases set the map to
+ something different from the default.
+
+2009-12-15
+ * Cleanup: Remove DrawAxisLegend() - empty function marked TODO,
+ not really clear what it was meant to do.
+
+2009-12-14
+ * Fix for bug 2914403 "Pie + X/Y titles: Undefined property error":
+ In DrawGraph(), don't try to draw X or Y titles for pie charts.
+
+ * Feature request 2899921: "allow different format for data and tick
+ labels"; Bug 2906436: "Fixes for X Tick Labels vs X Data Labels",
+ and partial implementation of changes from user 'adoll' regarding
+ tick vs data labels:
+
+ New public functions:
+ + SetXDataLabelType() : Sets formatting for X Data Labels
+ + SetYDataLabelType() : Sets formatting for Y Data Labels (bar charts)
+ + SetXDataLabelAngle() : Sets text angle for X Data Labels
+ + SetYDataLabelAngle() : Sets text angle for Y Data Label (bar charts)
+ The defaults for these are set up to be fully backward compatible
+ with previous releases of PHPlot (except see the next item).
+
+ Re-used function name SetXDataLabelAngle():
+ + This has been deprecated and undocumented since 2003-12-07, and
+ used to just call SetXLabelAngle(). For new behavior, see above.
+
+ Changes to public functions:
+ + SetXDataLabelPos() and SetXTickLabelPos() no longer cancel each
+ other out (set the other control variable to 'none'). Instead,
+ they are both considered before plot drawing.
+
+ Changes to internal functions:
+ + DrawDataLabel() now uses the font, angle, and color arguments as
+ provided, and does not substitute values if they are empty.
+ + SetLabelType() now takes mode='xd' and 'yd' for X Data and Y Data
+ label formatting; 'x' and 'y' are for tick labels only now.
+ + Functions that work on Data labels now call FormatLabels() with the
+ new mode parameter value 'xd' or 'yd, and use the new
+ data_label_angle variables.
+ + New CheckLabels(), used by DrawGraph to process label parameters.
+ + CalcMargins() - Rewritten to handle changes to Tick and Data labels.
+
+ Changes to internal class variables:
+ + New: x_data_label_angle, y_data_label_angle
+ + Do not initialize x_tick_label_pos or x_data_label_pos, so that
+ CheckLabels() can tell if they were set or not and apply defaults.
+ + Initialize y_data_label_pos to 'none', not 'plotleft'.
+ + Add 2 more indexes to label_format[] array: 'xd' and 'yd'.
+
+ * Cleanup:
+ + Delete unused internal class variable: draw_y_data_label_lines
+ + Delete unused function SetDrawYDataLabelLines()
+
+2009-12-07
+ * Fix bug 1795972 "Fix default point shapes":
+ + Added 10 new point shapes to the existing 10 shapes.
+ + Changed the default point shape from all 'diamond' to a
+ selection of up to 10 different shapes.
+ + Fixed bug in the code that tried to set the point shapes
+ and sizes arrays to be the same size. This was not working,
+ resulting in unexpected point sizes.
+ + Changed default point size to 6 for all shapes. It was trying
+ to be "5, 5, 3" but due to several bugs this was not working.
+ + Do not adjust shape sizes to even numbers (was done for only two
+ shapes). Instead, consistently truncate size/2 when needed.
+ NOTE: These may change the look of 'points' and 'linepoints' plots.
+
+ * Changed startup initialization code:
+ + SetDefaultStyles() was doing some odd things using a variable
+ called "session_set", with comments referring to non-existent
+ session support code. This has been removed. There should be
+ no visible changes from this. PHPlot does not use PHP sessions.
+
+2009-12-04
+ * Fix for bug 2908256, errors in pie charts with bad data array:
+ (From a Drupal contrib module report by thekevinday.)
+ With pie charts only, a data array with no valid Y values resulted
+ in PHP error messages. All other plot types handle this by producing
+ an image without a graph.
+ Fixed DrawPieChart to behave this way too. If there are no valid Y
+ values, or if the sum of all Y values is 0, do not error out, but
+ don't draw a pie chart either.
+ Also, pie charts now ignore non-numeric Y values, like other plot types.
+
+2009-11-20 (lbayuk)
+ * Fix for bug 2900914 "Problem with display of 0 on Y axis":
+ Changed how X and Y values are stepped by tick intervals, to avoid
+ cumulative round-off error. This fixes the problem when Y crosses 0 with
+ a tick step such as 0.1 resulting in a long label for a very small but
+ non-zero number. Fixed DrawXTicks, DrawYTicks, and CalcMaxTickLabelSize.
+ (Originally reported by cncnet)
+
+2009-11-19 (lbayuk)
+ * Improve support for using callbacks to annotate plots:
+ Added new callback 'draw_all', called after all drawing.
+ Supply plot_area[] as argument to some drawing callbacks.
+ Added new method GetDeviceXY() to translate from world coordinates.
+ Allow NULL or '' for $font in DrawText() internal method, meaning to
+ use the generic font. If callbacks want to use DrawText, this
+ avoids them having to reference the internal fonts[] array.
+
+2009-11-01 (lbayuk)
+ * Address bug report 2886365 "Declare all functions and variables in
+ PHP5 style"
+ PHP5 deprecates the use of 'var' to declare a class member variable.
+ All initialized class member variables are now declared 'public'.
+ (It was tempting to make most or all 'protected' or 'private', but
+ that would likely break too much, including the PHPlot Test Suite.)
+
+ Most class member functions which are meant for internal use only are
+ now declared 'protected', so they cannot be called from scripts
+ (except in child classes). (Note PHP5 does not deprecate the use of
+ just 'function' to mean public, so public functions were not changed.)
+ Internal functions are those documented in the manual under Developer's
+ Guide, Internal Functions. If your code breaks because you are using
+ a method which is now protected, please post the details on the help
+ forum.
+
+ Some member variables which were set in the constructor are now
+ initialized with the class instead. (No impact.)
+
+ Removed commented-out, FIXME-noted code for interim labels.
+
+2009-10-12 (lbayuk)
+ * Bug report 2839547, allow SetImageBorderType('none') to reset the image
+ border type. Also checked for other cases where there is no reset;
+ found one that exists (Set[XY]LabelType) but needs to be documented.
+
+2009-07-09 (lbayuk)
+ * Added a hook $plot->locale_override which can be set to True to prevent
+ PHPlot from loading locale settings from the environment with
+ setlocale(LC_ALL, ''). This is necessary for testing PHPlot on Windows,
+ where you cannot force a locale with an environment variable. It might
+ also be needed for people who want PHPlot's locale to differ from the
+ web server's locale.
+
+2009-06-12 (lbayuk) ===== Released as 5.0.7 =====
+
+2009-06-11 (lbayuk)
+ * Change PHPlot license to LGPL, per Afan.
+ phplot.php, phplot_data.php - Change license notice.
+ rgb.inc.php - Change top comments and remove bottom marker.
+ COPYING - new file, text of LGPL.
+ LICENSE.* - removed files - old licenses.
+ Makefile - change list of distributed files.
+
+ * Fix for bug 2803900: SetRGBArray('large') does not work. The include
+ file defined a different array name than the main script expected.
+ (This bug seems to have happened over 8 years ago.) Fixed the array
+ names to match. Also removed the ./ prefix from the included filename
+ so it will be found if on the include path but not in the script
+ directory. Also added error check if the rgb.inc.php include file
+ is needed and not found.
+
+2009-05-25 (lbayuk)
+ * Added new feature to allow partial margin or plot area specification.
+ You can omit, or specify as NULL, any of the 4 arguments to
+ SetMarginsPixels() or SetPlotAreaPixels(), and this means PHPlot
+ should use the automatically calculated margin on that side.
+ Credit to adoll for this feature.
+
+2009-05-17 (lbayuk)
+ * Fix for bug 2791502 "Error plots treat missing Y values as 0":
+ Plots with data type data-data-error now support missing Y values,
+ instead of treating them as 0. This works with lines, points,
+ and linepoints plot types, and also honors SetDrawBrokenLines.
+
+
+ * Fix for bug 2792860 "Wrong DataLabelLines with missing Y":
+ Do not draw X Data Label Lines at points with missing Y values.
+
+
+ * Fix for bug 2786350 "Missing Y data results in bad auto-range":
+ Rewrote FindDataLimits to ignore missing Y values, rather than
+ treating them as if 0, for calculating range.
+ Bug report and analysis by mrten.
+
+ * Fix for bug 2786354 "Incorrect auto-range for data-data-error":
+ For data-data-error data type, apply the positive and negative error
+ amounts for each Y point to that point only, rather than applying the
+ largest errors to the overall minimum and maximum Y value for the row.
+
+ Note: The two fixes above can change existing plots which rely on
+ automatic Y range calculation. The first fix affects plots with
+ missing Y values and min(Y)>0. The second fix can affect plots using
+ data-data-error data type and different error values for different
+ points. In both cases the new Y range can be smaller than before.
+
+2009-01-20 (lbayuk) ===== Released as 5.0.6 =====
+
+2009-01-18 (lbayuk)
+ * Fix for bug 1891636 "Misaligned TTF X Labels":
+ PHPlot was using the actual bounding box of each line of text
+ to allocate space and set the text positioning, but was ignoring the
+ fact that the text baseline is not the same as the bottom of the
+ bounding box. This resulted in uneven alignment of the X labels if
+ they had different heights (for example, month names Jul and Aug).
+
+ PHPlot now calculates the size of text for allocation (SizeText) using
+ the descenders on the last line, and calculates the size for drawing
+ (DrawText) only to the baseline. PHPlot also now uses a fixed line
+ spacing for each line of text in a font, rather than the actual text
+ height. This allows separately drawn multi-line labels to align.
+
+ * Changes to line spacing when using multi-line labels:
+ PHPlot was using the class variable line_spacing to mean the
+ number of pixels between lines of multi-line labels. This made the
+ spacing too small for larger fonts, and it was not possible to adjust
+ line spacing for different types of text.
+
+ PHPlot now interprets line_spacing as the number of pixels only
+ for GD text, and as a scale factor for the font's built-in line
+ spacing for TrueType text. In addition, a new optional argument is
+ added to SetFont, SetFontGD, and SetFontTTF to set a line spacing
+ specific to that type of text.
+
+ * Changes had to be made to the legend drawing code to accommodate the
+ changes to font handling.
+
+ Note: The line spacing change results in slightly looser spacing on
+ multi-line TrueType text labels, and slightly taller legends, compared
+ to version 5.0.5.
+
+2008-09-21 (lbayuk)
+ * Interim fix for bug 1932571 "Data-Data Plot fails with same X values".
+ PHPlot will no longer hang when the range of X values is 0 (that is, when
+ x_min == x_max). It will arbitrarily set an X range of 1, so the
+ calculated tick step is not 0. This is a temporary fix. Work on a smarter
+ X and Y range calculation is in progress, which will handle edge cases
+ like this better, but it isn't ready and this bug has been open too long.
+ Credit to andyl for finding the bug.
+
+ * Fix font path: Use DIRECTORY_SEPARATOR constant not '/'.
+
+ Extended the label formatting capabilities, adding 'printf' and 'custom'
+ types, added a prefix and suffix for 'data' type, and allow format controls
+ to be included in SetXLabelType and SetYLabelType.
+
+ External changes:
+ * Added 'printf' label type. The caller specifies the print format as the
+ 2nd argument to SetXLabelType or SetYLabelType (default '%e').
+ $plot->SetXLabelType('printf', '%5.2f');
+
+ * Added 'custom' label type. The caller supplies a callback (typically a
+ function name) and optional pass-through argument as the 2nd and 3rd
+ arguments to Set[XY]LabelType. The function is called as $f($value, $arg)
+ to return the formatted $value.
+ $plot->SetXLabelType('custom', 'myfunction', $arg_value);
+
+ * In addition to Set[XY]TimeFormat, the format string for type 'time' can
+ now be set as the 2nd argument to Set[XY]LabelType.
+ $plot->SetXLabelType('time', '%H:%M');
+
+ * In addition to SetPrecision[XY], the precision for type 'data' can now be
+ set as the 2nd argument to Set[XY]LabelType. A 3rd and 4th argument
+ can supply a prefix and suffix for 'data' formatting. (All optional)
+ $plot->SetXLabelType('data', 2, '$', 'US');
+
+ Internal changes:
+ * Class variables x_precision, y_precision, x_label_type, y_label_type,
+ x_time_format, and y_time_format have been removed.
+
+ * New class array variable label_format[], with elements 'x' and 'y' which
+ are arrays for label formatting. Elements in the sub-arrays are not
+ initialized until needed.
+
+ * New function SetLabelType, which implements Set[XY]LabelType now.
+
+ * FormatLabel() was rewritten to support the new label formatting.
+
+ Compatibility:
+ * Any code that directly references class variables related to label
+ formatting will break, except for data_units_text. Use the documented
+ function methods instead. Setting data_units_text as a suffix is
+ deprecated but still works.
+
+ * The 'data' type precision for 'Y' is still used for pie chart labels.
+
+2008-07-12 (lbayuk)
+ Multiple comment spelling error fixes. No functional changes.
+
+2008-07-06 (lbayuk)
+ Changes to allow mixing GD fixed-font text and TrueType Font (TTF) text
+ on the same plot.
+ (This change came from work done trying to fix TTF text positioning,
+ where it looks like additional information needs to be stored for TrueType
+ fonts. The old font data structure was awkward to extend, and allowing
+ mixed GD/TTF text was on the to-do list anyway.)
+
+ External changes:
+ * SetFontGD(), SetFontTTF(): New functions to set a font, with type.
+ * SetFont(): Now calls SetFontGD or SetFontTTF depending on $use_ttf.
+ These changes should be fully compatible with existing programs.
+
+ Internal changes:
+ * Updated comments explaining SetUseTTF() now sets the default type
+ (not the only type) of text used.
+ * Put all the font data into a class array. (Replaces $this->generic_font
+ with $this->fonts['generic'], etc.)
+ * ProcessTextGD() and ProcessTextTTF() now take the font array as one
+ argument, rather than separate arguments for font path and size.
+
+2008-01-13 (lbayuk) ===== Released as 5.0.5 =====
+ * phplot.php: Updated version
+ * README.txt: Updated for new release
+ * NEWS.txt: Add text for new release
+ * Makefile: Remove 'Callbacks' from release target, as this material is
+ now in the reference manual.
+
+2008-01-07 (lbayuk)
+ Copyright updated to 2008 and PHP4 no longer listed as supported.
+
+ Major rewrite of the margin calculation functions to address multiple
+ problems. Fixes for bugs 1856207 "Margin error with 'xaxis'/'yaxis'
+ position, 1843012 "Make margins, drawing consistent", and 945439
+ "x_tick_label_height not set correctly".
+
+ Note: These changes are inter-dependent and cannot be split up.
+
+ * Defer all calculations to DrawGraph time, to eliminate order dependencies.
+ These functions now just store their arguments in the object, and all
+ calculations happen later:
+ + SetXAxisPosition, SetYAxisPosition
+ + SetMarginsPixels
+ + SetPlotAreaPixels (Stores margins, not area, now.)
+ + SetPlotAreaWorld
+ + SetXTickIncrement, SetYTickIncrement
+
+ * A new callback 'debug_scale' was added to trace the margin and scale
+ calculations.
+
+ * CalcMargins was rewritten. Actual sizes of tick and data labels are now
+ used, rather than guesses like "use size of biggest Y value". A minimum
+ value (3 x safe_margin, or 15 pixels) applies to each margin.
+
+ * FindDataLimits no longer needs to find the longest data label, since
+ CalcMargins now does that more precisely.
+
+ * DrawXTitle and DrawYTitle now use position offsets calculated by
+ CalcMargins. Note: These titles are now offset from the plot area,
+ not the image area. The titles will move if you had set the plot area
+ or margins.
+
+ * DrawYTick, DrawXTick rewritten to use pre-calculated offsets, and common
+ code moved to new CalcTicks().
+
+ * DrawXDataLabel: Use pre-calculated offsets for text.
+
+ * DrawGraph: Rewrote top section (before drawing anything) to do the
+ calculations in the proper order, unconditionally.
+
+ * Class variables removed:
+ x_label_inc, y_label_inc, _x_label_cnt : These were never used.
+ title_height, x_title_height, y_title_width : Now internal to CalcMargins.
+ data_limits_done : No more need to remember if FindDataLimits called.
+
+ * New class variables added:
+ plot_margins_set : Keeps track of user-set plot area or automatic.
+ x_label_top_offset, x_label_bot_offset, x_offset_axis_offset,
+ y_label_left_offset, y_label_right_offset, y_label_axis_offset,
+ x_title_top_offset, x_title_bot_offset,
+ y_title_left_offset, y_title_left_offset : Label offsets
+
+ * New internal functions:
+ CalcPlotAreaPixels : Deferred calculations taken out of SetPlotAreaPixels
+ and SetMarginsPixels.
+ CalcPlotAreaWorld : Deferred calculations taken out of SetPlotAreaWorld.
+ CalcAxisPositions : Calculate axis positions, moved from CalcTranslation.
+ CalcTicks : Calculate X and Y tick interval. This still uses the
+ same simple method (basically range/10), but now we could drop in a new
+ algorithm much more easily. This is now also used by CalcMargins.
+ Code taken out of DrawXTicks and DrawYTicks.
+ CalcMaxTickLabelSize : So CalcMargins can use the exact tick label sizes.
+ CalcMaxDataLabelSize : So CalcMargins can use the exact data label sizes.
+ DrawXTick : Code split out from DrawXTicks for symmetry with DrawYTick.
+
+
+2007-12-13 (lbayuk)
+ * Changed ProcessTextTTF() so SizeText() will return integers. It rounds
+ the calculated values up, so the bounding box really contains the text.
+ This also prevents unneeded float calculations in derived values.
+
+2007-12-09 (lbayuk)
+ Major rewrite of the text drawing functions to address multiple problems.
+ Note: These changes are inter-dependent and cannot be split up.
+
+ * Fixed bug 1813070 "Bad position for multi-line TrueType text":
+ TTF text is now drawn line-by-line, not as a block, for proper
+ alignment and positioning.
+
+ * Fixed bug 1813071 "Wrong title height for multi-line TTF text":
+ Corrected miscalculation of overall height of multi-line TTF titles.
+ This bug resulted in over-sized margins.
+ The height is now computed line-by-line, including the inter-line spacing.
+
+ * Fixed bug 1813474 "DrawText alignment arguments wrong":
+ Corrected meaning of 'top' vs 'bottom' alignment. PHPlot now follows
+ the usual conventions: 'top' alignment means top of text to reference.
+ DrawText default for vertical alignment is still 'bottom', but the
+ meaning was corrected. All callers of DrawText were fixed.
+
+ * Fixed bug 1816844 "Fix order dependency for setting titles":
+ Defer processing titles strings until DrawGraph(), so there is no
+ more order dependency (no need to set font before setting title strings).
+
+ * Fixed bug 1819668 "Horiz. align multi-line text: GD vs TTF":
+ The new text routines draw TTF text line-by-line and correctly do
+ right-, center-, and left- alignment of each line within a text block.
+
+ * Fixed bug 1826513 "FIXME in DrawLegend: Max label length":
+ Use actual width of widest legend line to calculate legend box size.
+
+ * Partial fix for bug 945439 "x_tick_label_height not set correctly":
+ In FindDataLimits(), save the longest data label, not just its length,
+ and use the actual rendered size of that string in CalcMargins() for
+ the margin calculations.
+ Also take into account which of the tick or data labels are visible.
+ This is not a complete fix, but is a significant improvement.
+
+ The following changes were made related to the above fixes:
+
+ + Replaced internal function TTFBBoxSize(), which didn't work right, with
+ SizeText(). It returns the orthogonal bounding box of a block of text,
+ and works with both GD and TTF text.
+
+ + DrawText() and SizeText() call a single function ProcessText(), which is
+ the only place GD text and TTF text are distinguished. (So eventually
+ we will be able to mix GD and TTF text on a plot.)
+
+ + New internal functions ProcessTextGD() and ProcessTextTTF() draw (or size)
+ GD and TTF text respectively. These are only called by ProcessText().
+ These are re-implementations which properly position and align text.
+
+ + Removed class variables title_angle, x_title_angle, and y_title_angle. The
+ titles only work at their fixed angles anyway (0, 0, and 90 respectively).
+
+ + Line spacing set with SetLineSpacing() now affects TTF text as well as
+ GD text. Previously, it only affected GD text. The default line spacing
+ happens to be usable for TTF text.
+
+ + Added new callback hook 'debug_textbox' for developing, testing, and
+ documenting. It provides access to the text area bounding box.
+
+ + Removed unneeded class variables x_tick_label_height, y_tick_label_width,
+ x_tot_margin, y_tot_margin.
+
+2007-11-25
+ * Improve error handling:
+ Internal functions PrintError() and DrawError() are now the same. Both
+ will draw the error message into the image and output it, and then
+ trigger a user-level error. If no error handler has been set, it will
+ exit, as before. But now the error message should also get logged, or
+ written to the standard error stream, depending on the SAPI in use.
+ You can now establish an error handler to catch most PHPlot errors and
+ do some cleanup before exit.
+
+ This fix also covers bug #1823774 "Default Font Path and Error Message
+ Output".
+
+ Fixed the return value of most PHPlot functions, to return False on
+ error, else True. Since uncaught errors are fatal anyway, this only
+ affects code with an error handler that returns, which is not
+ recommended and unsupported at this time. These changes are for
+ possible future error handling options.
+
+2007-11-22
+ * Fix bug 1836528 "Insufficient checking of parameter values":
+ Rewrote CheckOption to correctly validate option choices.
+ (It previously accepted substrings and other incorrect values.)
+ PHPlot methods that use CheckOption now must be called with valid option
+ values. Empty strings are also no longer accepted.
+
+2007-11-17 (lbayuk)
+ * Change to callbacks to support extra arguments.
+ The PHPlot class can now pass extra arguments to a callback function.
+ Callback functions now take the following form:
+ my_callback($img, $passthru_arg, ...)
+ Where '...' is zero or more additional arguments supplied by PHPlot to
+ the callback. Each implemented callback reason will define any
+ additional arguments it uses. The existing defined callbacks have not
+ changed and do not currently pass any extra arguments.
+
+2007-11-10 (lbayuk)
+ * Fix bug 1827263 "Spoiled up pie-chart if $val is close to zero":
+ Skip pie slices which would result in an integer angle of zero
+ degrees, because the GD arc filling function will draw a complete
+ circle for that case.
+ Credit to Viacheslav <webdeveloper.ua at gmail.com> for finding this.
+
+ * Removed 8 of the functions (class methods) marked 'deprecated'. Only
+ deprecated functions which seem to have been for internal use have
+ been removed. Even old scripts shouldn't be using them, and they are
+ becoming a problem to maintain.
+ Removed: SetImageArea() DrawDotSeries() DrawLineSeries() CalcXHeights()
+ CalcYWidths() DrawLabels() InitImage() DrawDashedLine().
+
+2007-10-20 (lbayuk) ===== Released as 5.0.4 =====
+ * phplot.php: Updated copyright, version, and authors comments at top.
+ * README.txt: Updated for new release
+ * NEWS.txt: Add text for new release
+
+2007-10-18 (lbayuk)
+ * Add callbacks - experimental feature:
+ New functions SetCallback, GetCallback, RemoveCallback.
+ New internal function DoCallback.
+ Added callback hooks to DrawGraph.
+
+ Re-arranged code in DrawGraph to bring pie chart drawing into the main
+ switch on plot type, rather than a special case in its own block. This
+ makes it easier to follow and easier to add callback hooks.
+
+ * Callbacks: New file, documentation for the new callbacks feature.
+ (This won't be in the manual while it is an experimental feature.)
+
+2007-10-15 (lbayuk)
+ * Fix for bug 1813021: Miss-positioned right-justified vertical GD text.
+ Fixed DrawText() to correctly position 90 degree right-justified text
+ drawn in a fixed GD font. This could be seen with 90 degree Y tick
+ labels. (Found by accident while working on TrueType text problems.)
+ Also some code cleanup in DrawText: use elseif where appropriate.
+
+2007-10-09 (lbayuk)
+ * Code cleanup: Simplify SetIndexColor() and SetIndexDarkColor().
+ There is no need to first try ImageColorExact, then ImageColorResolve
+ if that fails. ImageColorResolve does all that for us.
+
+ Code cleanup: Rewrite SetRGBColor(). It now detects if an unrecognized
+ color name or color value form is used, and draws an error message.
+ Before this it would get a PHP index error and "headers already sent"
+ condition.
+
+ * Code cleanup: Remove duplicated code for loading image files.
+ Added new class-private function GetImage() which loads an image based
+ on the image type, and also returns the image size. This replaces
+ duplicated code in tile_img() and SetInputFile().
+ Also fixed comment at top of SetImageFile which said it was deprecated.
+ It isn't - it is used by the constructor. Moved the function out of the
+ 'deprecated' area up to below where it is used.
+
+ * Code cleanup: PHPlot should not define or affect anything outside its
+ own class.
+ - Removed the check for __FUNCTION__ (PHP 4.3 and up). This is obsolete.
+ - Do not set error_reporting to E_ALL. Although it is recommended that
+ scripts do this, it is not the place of loaded classes to do it.
+ - Remove unused global constant TOTY.
+ - Removed constants MAXY and MINY. Global constants like this are bad.
+ These were used as magic index values into data[] to hold min and max Y
+ values for the row. Instead, put them in separate arrays which are
+ named data_miny[] and data_maxy[]. (This seems to be only used by the
+ data line drawing function.)
+
+ Comment cleanup: Remove one commented-out partial function DrawPlotLabel,
+ and fix another commented-out code fragment in DrawYErrorBar. Both of
+ these had unmatched braces in them which caused a balance-braces check
+ to fail.
+
+ * Code cleanup, array padding: Get rid of functions outside the class
+ and remove the interim fix for PHP 5 (which changed the behavior of
+ array_merge). Rewrote external function array_pad_array() as a new
+ class function pad_array(). It does not need access to the class,
+ but I don't think PHPlot should add to the global namespace more
+ than necessary. The third argument (array to use for padding) was
+ never used, so it was removed. It always pads the array with itself.
+ It now only works on 'usual integer indexed' arrays (0-based
+ sequential integer index). The was previously required but
+ undocumented for some of the arrays (like line_widths); now it is
+ required for all style arrays and will be documented. Now we can pad
+ the array to the required length, not just N times its previous
+ length, and we don't need array_merge. Deleted external function
+ array_merge_php4() as it is no longer used.
+
+ Deleted PHP end marker ?>. You don't need this and it can cause
+ problems with extra whitespace in your output.
+
+2007-09-24 (lbayuk)
+ * Code cleanup: Fix ternary operator misuse. This doesn't change
+ behavior, but it was annoying me so I fixed it.
+ Replaced all cases of code like this: $a = ($a > $b) ? $b : $a
+ With just: if ($a > $b) $a = $b
+
+ * Fix Makefile 'release' target to set owner/group when creating
+ the tar file. This avoids having to run it as root, but it needs
+ GNU tar to work.
+
+2007-09-08 (lbayuk)
+ * Fix for bug 1790441: Removed the PHPlot quasi-destructor function and
+ the register_shutdown_function() call which arranged for it to be used.
+ This was preventing release of memory when a PHPlot object was unset,
+ because the registered shutdown function held a reference to it.
+ So rather than improving memory use, it had the opposite effect.
+ Note: It is no longer necessary or recommended to use reference
+ assignment ($plot =& new PHPlot) for PHPlot object creation.
+ Thanks to annajilly for the thorough analysis, bug report, and fix.
+
+2007-09-05 (lbayuk)
+ * Rewrote FormatLabel() to ignore blank label values. Adapted from a
+ patch and feature request submitted by Gerhard Reithofer (exgerhardr).
+ Blank labels used to produce an error if the LabelType was set to
+ 'time', and zero if set to 'data'. Now they are just ignored. This
+ provides a simple way to have labels only at selected intervals when
+ using time or data formats. For example, you can have a date/time
+ label at every 10th data point by setting the labels for the other 9
+ to be empty strings. Also: Removed $which_pos values 'plotx' and
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