Added limit_text_angle option for axis text angle.

CHANGES.txt

@@ -1,3 +1,12 @@
+Version 3.10 (19/07/2021)
+------------
+- Added support for using text as a shape or figure.
+- Fixed angled axis text being badly placed with new limit_text_angle option.
+- Fixed guidelines not showing on date/time graphs.
+- Fixed some missing date/time tokens in crosshair text.
+- Fixed histograms not supporting non-integer values.
+- Fixed polar area graphs drawing incorrectly with date/time keys.
+
 Version 3.9 (24/05/2021)
 -----------
 - Added support for linking legend entries and title.

DisplayAxis.php

@@ -124,6 +124,15 @@ public function __construct(&$graph, &$axis, $axis_no, $orientation, $type,
     if($this->show_text) {
       $styles['t_angle'] = $graph->getOption(
         ['axis_text_angle_' . $o, $axis_no], 0);
+      if($graph->getOption('limit_text_angle')) {
+        $angle = $styles['t_angle'] % 360;
+        if($angle > 180)
+          $angle = -360 + $angle;
+        if($angle < -180)
+          $angle = 360 + $angle;
+        $angle = min(90, max(-90, $angle));
+        $styles['t_angle'] = $angle;
+      }
       $styles['t_position'] = $graph->getOption(
         ['axis_text_position_' . $o, $axis_no], 'axis_text_position');
       $styles['t_location'] = $graph->getOption(

README.txt

@@ -1,5 +1,5 @@
-SVGGraph Library version 3.9
-============================
+SVGGraph Library version 3.10
+=============================
 
 This library provides PHP classes and functions for easily creating SVG
 graphs from data. Version 3.0 of SVGGraph requires at least PHP 5.4 - if

SVGGraph.php

@@ -25,7 +25,7 @@ class SVGGraph {
 
   use SVGGraphTrait;
 
-  const VERSION = 'SVGGraph 3.9';
+  const VERSION = 'SVGGraph 3.10';
   private $width = 100;
   private $height = 100;
   private $settings = [];

svggraph.ini

@@ -421,6 +421,7 @@ force_block_label_x = false
 axis_zero_y = true
 axis_ticks_x = null
 axis_ticks_y = null
+limit_text_angle = true
 
 [BarGraph]
 bar_space = 10