From a233c63b7379fe04219b5d666877e71dec3ba9e0 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineeringinc.com>
Date: Sun, 13 Dec 2015 00:09:38 -0600
Subject: Add option to bound fill between the current dataset and the previous
 dataset on radar plots

---
 src/charts/radar.php              | 19 +++++++++++++++++++
 src/datasets/base.php             |  9 +++++++++
 src/interfaces/radar_renderer.php |  2 ++
 src/renderer/2d.php               | 20 ++++++++++++++++----
 4 files changed, 46 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/charts/radar.php b/src/charts/radar.php
index b7bd820..c1f52e1 100644
--- a/src/charts/radar.php
+++ b/src/charts/radar.php
@@ -296,6 +296,7 @@ class ezcGraphRadarChart extends ezcGraphChart
 
         // Display data
         $this->elements['axis']->position = ezcGraph::TOP;
+        $prevDataSetPoints = array();
         foreach ( $this->data as $datasetName => $data )
         {
             --$nr;
@@ -315,8 +316,11 @@ class ezcGraphRadarChart extends ezcGraphChart
                 $fillColor = null;
             }
 
+            $prevDataSetBounded = $data->boundFillToPreviousDataSet;
+
             // Draw lines for dataset
             $lastPoint = false;
+            $lastInnerPoint = false;
             foreach ( $data as $key => $value )
             {
                 $point = new ezcGraphCoordinate( 
@@ -336,6 +340,16 @@ class ezcGraphRadarChart extends ezcGraphChart
                 ); 
                 // */
 
+                if ($prevDataSetBounded && array_key_exists($key, $prevDataSetPoints)) {
+                    $innerPoint = $prevDataSetPoints[$key];
+                }
+                else {
+                    $innerPoint = new ezcGraphCoordinate(
+                        0,
+                        0
+                    );
+                }
+
                 $renderer->drawRadarDataLine(
                     $boundings,
                     new ezcGraphContext( $datasetName, $key, $data->url[$key] ),
@@ -343,6 +357,8 @@ class ezcGraphRadarChart extends ezcGraphChart
                     clone $center,
                     ( $lastPoint === false ? $point : $lastPoint ),
                     $point,
+                    $innerPoint,
+                    ( $lastInnerPoint === false ? $innerPoint : $lastInnerPoint ),
                     $nr,
                     $count,
                     $data->symbol[$key],
@@ -351,7 +367,10 @@ class ezcGraphRadarChart extends ezcGraphChart
                     $this->options->lineThickness
                 );
 
+                $prevDataSetPoints[$key] = $point;
+
                 $lastPoint = $point;
+                $lastInnerPoint = $innerPoint;
             }
         }
     }
diff --git a/src/datasets/base.php b/src/datasets/base.php
index 219b3f9..5dc9ae6 100644
--- a/src/datasets/base.php
+++ b/src/datasets/base.php
@@ -40,6 +40,10 @@
  * @property mixed $fillLine
  *           Interpretation depends on underlying chart type
  *           @see chart type fillLines option for details
+ * @property bool $boundFillToPreviousDataSet
+ *           Only fill the region between the current data set
+ *           and the previous data set.  Only works for radar
+ *           plots at this time.  @see $fillLine property.
  * @property int $displayType
  *           Display type of chart data
  * @property string $url
@@ -114,6 +118,7 @@ abstract class ezcGraphDataSet implements ArrayAccess, Iterator, Countable
 
         $this->properties['highlight']->default = false;
         $this->properties['fillLine'] = false;
+        $this->properties['boundFillToPreviousDataSet'] = false;
     }
 
     /**
@@ -168,6 +173,10 @@ abstract class ezcGraphDataSet implements ArrayAccess, Iterator, Countable
                     : (int) $propertyValue );
                 break;
 
+            case 'boundFillToPreviousDataSet':
+                $this->properties[$propertyName] = $propertyValue;
+                break;
+
             default:
                 throw new ezcBasePropertyNotFoundException( $propertyName );
                 break;
diff --git a/src/interfaces/radar_renderer.php b/src/interfaces/radar_renderer.php
index cb2697b..016c857 100644
--- a/src/interfaces/radar_renderer.php
+++ b/src/interfaces/radar_renderer.php
@@ -58,6 +58,8 @@ interface ezcGraphRadarRenderer
         ezcGraphCoordinate $center,
         ezcGraphCoordinate $start,
         ezcGraphCoordinate $end,
+        ezcGraphCoordinate $fillStart,
+        ezcGraphCoordinate $fillEnd,
         $dataNumber = 1,
         $dataCount = 1,
         $symbol = ezcGraph::NO_SYMBOL,
diff --git a/src/renderer/2d.php b/src/renderer/2d.php
index 9793e0a..3fd7812 100644
--- a/src/renderer/2d.php
+++ b/src/renderer/2d.php
@@ -884,6 +884,8 @@ class ezcGraphRenderer2d
         ezcGraphCoordinate $center,
         ezcGraphCoordinate $start,
         ezcGraphCoordinate $end,
+        ezcGraphCoordinate $fillStart,
+        ezcGraphCoordinate $fillEnd,
         $dataNumber = 1,
         $dataCount = 1,
         $symbol = ezcGraph::NO_SYMBOL,
@@ -905,6 +907,18 @@ class ezcGraphRenderer2d
             $end->x * 2 * M_PI,
             $end->y
         );
+        $fillStart = $this->getCoordinateFromAngleAndRadius(
+            $boundings,
+            $center,
+            $fillStart->x * 2 * M_PI,
+            $fillStart->y
+        );
+        $fillEnd = $this->getCoordinateFromAngleAndRadius(
+            $boundings,
+            $center,
+            $fillEnd->x * 2 * M_PI,
+            $fillEnd->y
+        );
 
         // Fill line
         if ( $fillColor !== null )
@@ -913,10 +927,8 @@ class ezcGraphRenderer2d
                 array(
                     $start,
                     $end,
-                    new ezcGraphCoordinate(
-                        $boundings->x0 + $center->x,
-                        $boundings->y0 + $center->y
-                    ),
+                    $fillStart,
+                    $fillEnd
                 ),
                 $fillColor,
                 true
-- 
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