- Added axis label renderer for centered labels

- Fixed: Do not draw grids and steps on other axis

1 files changed, 15 insertions, 2 deletions

diff --git a/src/element/axis.php b/src/element/axis.php
index 7fb051a..b4805fa 100644
--- a/src/element/axis.php
+++ b/src/element/axis.php
@@ -82,9 +82,12 @@ abstract class ezcGraphChartElementAxis extends ezcGraphChartElement
 
     public function __construct( array $options = array() )
     {
-        $this->axisLabelRenderer = new ezcGraphAxisExactLabelRenderer();
-
         parent::__construct( $options );
+
+        if ( !isset( $this->axisLabelRenderer ) )
+        {
+            $this->axisLabelRenderer = new ezcGraphAxisExactLabelRenderer();
+        }
     }
 
     /**
@@ -210,6 +213,16 @@ abstract class ezcGraphChartElementAxis extends ezcGraphChartElement
     abstract public function getLabel( $step );
 
     /**
+     * Is zero step
+     *
+     * Returns true if the given step is the one on the initial axis position
+     * 
+     * @param int $step Number of step
+     * @return bool Status If given step is initial axis position
+     */
+    abstract public function isZeroStep( $step );
+
+    /**
      * Add data for this axis
      * 
      * @param mixed $value Value which will be displayed on this axis