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<?php
/**
* File containing the ezcGraphAxisExactLabelRenderer class
*
* @package Graph
* @version //autogentag//
* @copyright Copyright (C) 2005-2007 eZ systems as. All rights reserved.
2006 eZ systems as. All rights reserved.
* @license http://ez.no/licenses/new_bsd New BSD License
*/
/**
* Renders axis labels like known from charts drawn in analysis
*
* @property bool $showLastValue
* Show the last value on the axis, which will be aligned different
* than all other values, to not interfere with the arrow head of
* the axis.
*
* @package Graph
* @mainclass
*/
class ezcGraphAxisExactLabelRenderer extends ezcGraphAxisLabelRenderer
{
/**
* Constructor
*
* @param array $options Default option array
* @return void
* @ignore
*/
public function __construct( array $options = array() )
{
$this->properties['showLastValue'] = true;
parent::__construct( $options );
}
/**
* __set
*
* @param mixed $propertyName
* @param mixed $propertyValue
* @throws ezcBaseValueException
* If a submitted parameter was out of range or type.
* @throws ezcBasePropertyNotFoundException
* If a the value for the property options is not an instance of
* @return void
* @ignore
*/
public function __set( $propertyName, $propertyValue )
{
switch ( $propertyName )
{
case 'showLastValue':
if ( !is_bool( $propertyValue ) )
{
throw new ezcBaseValueException( $propertyName, $propertyValue, 'bool' );
}
$this->properties['showLastValue'] = (bool) $propertyValue;
break;
default:
return parent::__set( $propertyName, $propertyValue );
}
}
/**
* 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 )
{
// receive rendering parameters from axis
$steps = $axis->getSteps();
$axisBoundings = new ezcGraphBoundings(
$start->x, $start->y,
$end->x, $end->y
);
// Determine normalized axis direction
$direction = new ezcGraphVector(
$start->x - $end->x,
$start->y - $end->y
);
$direction->unify();
if ( $this->outerGrid )
{
$gridBoundings = $boundings;
}
else
{
$gridBoundings = new ezcGraphBoundings(
$boundings->x0 + $renderer->xAxisSpace * abs( $direction->y ),
$boundings->y0 + $renderer->yAxisSpace * abs( $direction->x ),
$boundings->x1 - $renderer->xAxisSpace * abs( $direction->y ),
$boundings->y1 - $renderer->yAxisSpace * abs( $direction->x )
);
}
// Draw steps and grid
foreach ( $steps as $nr => $step )
{
$position = new ezcGraphCoordinate(
$start->x + ( $end->x - $start->x ) * $step->position,
$start->y + ( $end->y - $start->y ) * $step->position
);
$stepSize = new ezcGraphCoordinate(
$axisBoundings->width * $step->width,
$axisBoundings->height * $step->width
);
if ( ! $step->isZero )
{
// major grid
if ( $axis->majorGrid )
{
$this->drawGrid(
$renderer,
$gridBoundings,
$position,
$stepSize,
$axis->majorGrid
);
}
// major step
$this->drawStep(
$renderer,
$position,
$direction,
$axis->position,
$this->majorStepSize,
$axis->border
);
}
if ( $this->showLabels )
{
switch ( $axis->position )
{
case ezcGraph::RIGHT:
case ezcGraph::LEFT:
$labelWidth = $axisBoundings->width *
$steps[$nr - $step->isLast]->width /
( $this->showLastValue + 1 );
$labelHeight = $renderer->yAxisSpace;
break;
case ezcGraph::BOTTOM:
case ezcGraph::TOP:
$labelWidth = $renderer->xAxisSpace;
$labelHeight = $axisBoundings->height *
$steps[$nr - $step->isLast]->width /
( $this->showLastValue + 1 );
break;
}
$showLabel = true;
switch ( true )
{
case ( !$this->showLastValue && $step->isLast ):
// Skip last step if showLastValue is false
$showLabel = false;
break;
// Draw label at top left of step
case ( ( $axis->position === ezcGraph::BOTTOM ) &&
( !$step->isLast ) ) ||
( ( $axis->position === ezcGraph::TOP ) &&
( $step->isLast ) ):
$labelBoundings = new ezcGraphBoundings(
$position->x - $labelWidth + $this->labelPadding,
$position->y - $labelHeight + $this->labelPadding,
$position->x - $this->labelPadding,
$position->y - $this->labelPadding
);
$alignement = ezcGraph::RIGHT | ezcGraph::BOTTOM;
break;
// Draw label at bottom right of step
case ( ( $axis->position === ezcGraph::LEFT ) &&
( !$step->isLast ) ) ||
( ( $axis->position === ezcGraph::RIGHT ) &&
( $step->isLast ) ):
$labelBoundings = new ezcGraphBoundings(
$position->x + $this->labelPadding,
$position->y + $this->labelPadding,
$position->x + $labelWidth - $this->labelPadding,
$position->y + $labelHeight - $this->labelPadding
);
$alignement = ezcGraph::LEFT | ezcGraph::TOP;
break;
// Draw label at bottom left of step
case ( ( $axis->position === ezcGraph::TOP ) &&
( !$step->isLast ) ) ||
( ( $axis->position === ezcGraph::RIGHT ) &&
( !$step->isLast ) ) ||
( ( $axis->position === ezcGraph::BOTTOM ) &&
( $step->isLast ) ) ||
( ( $axis->position === ezcGraph::LEFT ) &&
( $step->isLast ) ):
$labelBoundings = new ezcGraphBoundings(
$position->x - $labelWidth + $this->labelPadding,
$position->y + $this->labelPadding,
$position->x - $this->labelPadding,
$position->y + $labelHeight - $this->labelPadding
);
$alignement = ezcGraph::RIGHT | ezcGraph::TOP;
break;
}
if ( $showLabel )
{
$renderer->drawText(
$labelBoundings,
$step->label,
$alignement
);
}
}
if ( !$step->isLast )
{
// Iterate over minor steps
foreach ( $step->childs as $minorStep )
{
$minorStepPosition = new ezcGraphCoordinate(
$start->x + ( $end->x - $start->x ) * $minorStep->position,
$start->y + ( $end->y - $start->y ) * $minorStep->position
);
$minorStepSize = new ezcGraphCoordinate(
$axisBoundings->width * $minorStep->width,
$axisBoundings->height * $minorStep->width
);
if ( $axis->minorGrid )
{
$this->drawGrid(
$renderer,
$gridBoundings,
$minorStepPosition,
$minorStepSize,
$axis->minorGrid
);
}
// major step
$this->drawStep(
$renderer,
$minorStepPosition,
$direction,
$axis->position,
$this->minorStepSize,
$axis->border
);
}
}
}
}
}
?>
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