- Implemented: #15095: Special rotated label renderer for bar charts.

1 files changed, 146 insertions, 0 deletions

diff --git a/src/renderer/axis_label_rotated_boxed.php b/src/renderer/axis_label_rotated_boxed.php
new file mode 100644
index 0000000..089d005
--- /dev/null
+++ b/src/renderer/axis_label_rotated_boxed.php
@@ -0,0 +1,146 @@
+<?php
+/**
+ * File containing the ezcGraphAxisRotatedLabelRenderer class
+ *
+ * @package Graph
+ * @version //autogentag//
+ * @copyright Copyright (C) 2005-2009 eZ Systems AS. All rights reserved.
+ * @license http://ez.no/licenses/new_bsd New BSD License
+ */
+/**
+ * Can render axis labels rotated, so that more axis labels fit on one axis.
+ * Produces best results if the axis space was increased, so that more spcae is
+ * available below the axis.
+ *
+ * <code>
+ *   $chart->xAxis->axisLabelRenderer = new ezcGraphAxisRotatedLabelRenderer();
+ *
+ *   // Define angle manually in degree
+ *   $chart->xAxis->axisLabelRenderer->angle = 45;
+ *
+ *   // Increase axis space
+ *   $chart->xAxis->axisSpace = .2;
+ * </code>
+ *
+ * @property float $angle
+ *           Angle of labels on axis in degrees.
+ *
+ * @version //autogentag//
+ * @package Graph
+ * @mainclass
+ */
+class ezcGraphAxisRotatedBoxedLabelRenderer extends ezcGraphAxisRotatedLabelRenderer
+{
+    /**
+     * Render Axis labels
+     *
+     * Render labels for an axis.
+     *
+     * @param ezcGraphRenderer $renderer Renderer used to draw the chart
+     * @param ezcGraphBoundings $boundings Boundings of the axis
+     * @param ezcGraphCoordinate $start Axis starting point
+     * @param ezcGraphCoordinate $end Axis ending point
+     * @param ezcGraphChartElementAxis $axis Axis instance
+     * @return void
+     */
+    public function renderLabels(
+        ezcGraphRenderer $renderer,
+        ezcGraphBoundings $boundings,
+        ezcGraphCoordinate $start,
+        ezcGraphCoordinate $end,
+        ezcGraphChartElementAxis $axis,
+        ezcGraphBoundings $innerBoundings = null )
+    {
+        // receive rendering parameters from axis
+        $this->steps = $steps = $axis->getSteps();
+
+        $axisBoundings = new ezcGraphBoundings(
+            $start->x, $start->y,
+            $end->x, $end->y
+        );
+
+        // Determine normalized axis direction
+        $this->direction = new ezcGraphVector(
+            $end->x - $start->x,
+            $end->y - $start->y
+        );
+        $this->direction->unify();
+
+        // Get axis space
+        $gridBoundings = null;
+        list( $xSpace, $ySpace ) = $this->getAxisSpace( $renderer, $boundings, $axis, $innerBoundings, $gridBoundings );
+
+        // Determine optimal angle if none specified
+        $this->determineAngle( $steps, $xSpace, $ySpace, $axisBoundings );
+        $degTextAngle = $this->determineTextOffset( $axis, $steps );
+        $labelLength  = $this->calculateLabelLength( $start, $end, $xSpace, $ySpace, $axisBoundings );
+
+        // Determine additional required axis space by boxes
+        $firstStep = reset( $steps );
+        $lastStep = end( $steps );
+
+        $this->widthModifier = 1 + $firstStep->width / 2 + $lastStep->width / 2;
+
+        // Draw steps and grid
+        foreach ( $steps as $nr => $step )
+        {
+            $position = new ezcGraphCoordinate(
+                $start->x + ( $end->x - $start->x ) * ( $step->position + $step->width ) / $this->widthModifier,
+                $start->y + ( $end->y - $start->y ) * ( $step->position + $step->width ) / $this->widthModifier
+            );
+    
+            $stepWidth = $step->width / $this->widthModifier;
+
+            $stepSize = new ezcGraphCoordinate(
+                $axisBoundings->width * $stepWidth,
+                $axisBoundings->height * $stepWidth
+            );
+
+            // Calculate label boundings
+            $labelSize = $this->calculateLabelSize( $steps, $nr, $step, $xSpace, $ySpace, $axisBoundings );
+            $lengthReducement = min(
+                abs( tan( deg2rad( $this->angle ) ) * ( $labelSize / 2 ) ),
+                abs( $labelLength / 2 )
+            );
+
+            $this->renderLabelText( $renderer, $axis, $position, $step->label, $degTextAngle, $labelLength, $labelSize, $lengthReducement );
+
+            // Major grid
+            if ( $axis->majorGrid )
+            {
+                $this->drawGrid( $renderer, $gridBoundings, $position, $stepSize, $axis->majorGrid );
+            }
+            
+            // Major step
+            $this->drawStep( $renderer, $position, $this->direction, $axis->position, $this->majorStepSize, $axis->border );
+        }
+    }
+    
+    /**
+     * Modify chart data position
+     *
+     * Optionally additionally modify the coodinate of a data point
+     * 
+     * @param ezcGraphCoordinate $coordinate Data point coordinate
+     * @return ezcGraphCoordinate Modified coordinate
+     */
+    public function modifyChartDataPosition( ezcGraphCoordinate $coordinate )
+    {
+        $firstStep = reset( $this->steps );
+        $offset = $firstStep->width / 2 / $this->widthModifier;
+
+        return new ezcGraphCoordinate(
+            $coordinate->x * abs( $this->direction->y ) + (
+                $coordinate->x * ( 1 / $this->widthModifier ) * ( 1 - abs( $this->offset ) ) +
+                abs( $this->offset ) +
+                $offset
+            ) * abs( $this->direction->x ),
+            $coordinate->y * abs( $this->direction->x ) + (
+                $coordinate->y * ( 1 / $this->widthModifier ) * ( 1 - abs( $this->offset ) ) +
+                abs( $this->offset ) +
+                $offset
+            ) * abs( $this->direction->y )
+        );
+    }
+}
+?>