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<?php
/**
* File containing the ezcGraphAxisRotatedLabelRenderer class
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* @package Graph
* @version //autogentag//
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
*/
/**
* 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 )
);
}
}
?>
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