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Graph: ezcGraphAxisRotatedLabelRenderer

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Class: ezcGraphAxisRotatedLabelRenderer

Can render axis labels rotated, so that more axis labels fit on one axis. [source]
Produces best results if the axis space was increased, so that more spcae is available below the axis.
 1.    $chart->xAxis->axisLabelRenderer new ezcGraphAxisRotatedLabelRenderer();
 2.  
 3.    // Define angle manually in degree
 4.    $chart->xAxis->axisLabelRenderer->angle 45;
 5.  
 6.    // Increase axis space
 7.    $chart->xAxis->axisSpace .2;

Parents

ezcBaseOptions
   |
   --ezcGraphAxisLabelRenderer
      |
      --ezcGraphAxisRotatedLabelRenderer

Descendents

Child Class Description
ezcGraphAxisRotatedBoxedLabelRenderer Can render axis labels rotated, so that more axis labels fit on one axis.

Properties

float read/write  $angle
Angle of labels on axis in degrees.

Member Variables

protected ezcGraphVector $direction
Store direction for later coordinate modifications
protected float $offset
Store coordinate offset for later coordinate modifications
protected array(ezcGraphStep) $steps
Store step array for later coordinate modifications
protected float $widthModifier
Store coordinate width modifier for later coordinate modifications

Inherited Member Variables

From ezcGraphAxisLabelRenderer:
protected  ezcGraphAxisLabelRenderer::$driver
From ezcBaseOptions:
protected  ezcBaseOptions::$properties

Method Summary

protected float calculateLabelLength( $start, $end, $xSpace, $ySpace, $axisBoundings )
Calculate general label length
protected float calculateLabelSize( $steps, $nr, $step, $xSpace, $ySpace, $axisBoundings )
Calculate label size
protected void determineAngle( $steps, $xSpace, $ySpace, $axisBoundings )
Determine label angle
protected float determineTextOffset( $axis, $steps )
Determine text offset.
public ezcGraphCoordinate modifyChartDataPosition( $coordinate )
Modify chart data position
public void renderLabels( $renderer, $boundings, $start, $end, $axis, [$innerBoundings = null] )
Render Axis labels
protected void renderLabelText( $renderer, $axis, $position, $label, $degTextAngle, $labelLength, $labelSize, $lengthReducement )
Render label text.

Inherited Methods

From ezcGraphAxisLabelRenderer :
public mixed ezcGraphAxisLabelRenderer::determineLineCuttingPoint()
Checks for the cutting point of two lines.
protected void ezcGraphAxisLabelRenderer::drawGrid()
Draw grid
protected void ezcGraphAxisLabelRenderer::drawNonRectangularGrid()
Draw non-rectangular grid lines grid
protected void ezcGraphAxisLabelRenderer::drawRectangularGrid()
Draw rectangular grid
public void ezcGraphAxisLabelRenderer::drawStep()
Draw single step on a axis
protected array ezcGraphAxisLabelRenderer::getAxisSpace()
Get axis space values
public ezcGraphBoundings ezcGraphAxisLabelRenderer::modifyChartBoundings()
Modify chart boundings
public ezcGraphCoordinate ezcGraphAxisLabelRenderer::modifyChartDataPosition()
Modify chart data position
public abstract void ezcGraphAxisLabelRenderer::renderLabels()
Render Axis labels
From ezcBaseOptions :
public ezcBaseOptions ezcBaseOptions::__construct()
Construct a new options object.
public void ezcBaseOptions::merge()
Merge an array into the actual options object.
public bool ezcBaseOptions::offsetExists()
Returns if an option exists.
public mixed ezcBaseOptions::offsetGet()
Returns an option value.
public void ezcBaseOptions::offsetSet()
Set an option.
public void ezcBaseOptions::offsetUnset()
Unset an option.

Methods

calculateLabelLength

float calculateLabelLength( ezcGraphCoordinate $start, ezcGraphCoordinate $end, float $xSpace, float $ySpace, $axisBoundings )
Calculate general label length

Parameters

Name Type Description
$start ezcGraphCoordinate  
$end ezcGraphCoordinate  
$xSpace float  
$ySpace float  
$axisBoundings ezcGraphBoundings  

calculateLabelSize

float calculateLabelSize( $steps, int $nr, array $step, float $xSpace, float $ySpace, $axisBoundings )
Calculate label size
Calculate the size of a single lable in a single step.

Parameters

Name Type Description
$steps array  
$nr int  
$step array  
$xSpace float  
$ySpace float  
$axisBoundings ezcGraphBoundings  

determineAngle

void determineAngle( $steps, $xSpace, $ySpace, $axisBoundings )
Determine label angle
Determine the optiomal angle for the axis labels, of no angle has been provided by the user.

Parameters

Name Type Description
$steps array  
$xSpace  
$ySpace  
$axisBoundings ezcGraphBoundings  

determineTextOffset

float determineTextOffset( ezcGraphChartElementAxis $axis, $steps )
Determine text offset.
Calculate the label offset and angle, from the configured or evaluated text angle.
Returns the text angle in degrees.

Parameters

Name Type Description
$axis ezcGraphChartElementAxis  
$steps array  

modifyChartDataPosition

ezcGraphCoordinate modifyChartDataPosition( ezcGraphCoordinate $coordinate )
Modify chart data position
Optionally additionally modify the coodinate of a data point

Parameters

Name Type Description
$coordinate ezcGraphCoordinate Data point coordinate

Redefinition of

Method Description
ezcGraphAxisLabelRenderer::modifyChartDataPosition() Modify chart data position

Redefined in descendants as

Method Description
ezcGraphAxisRotatedBoxedLabelRenderer::modifyChartDataPosition() Modify chart data position

renderLabels

void renderLabels( ezcGraphRenderer $renderer, $boundings, ezcGraphCoordinate $start, ezcGraphCoordinate $end, ezcGraphChartElementAxis $axis, [ $innerBoundings = null] )
Render Axis labels
Render labels for an axis.

Parameters

Name Type Description
$renderer ezcGraphRenderer Renderer used to draw the chart
$boundings ezcGraphBoundings Boundings of the axis
$start ezcGraphCoordinate Axis starting point
$end ezcGraphCoordinate Axis ending point
$axis ezcGraphChartElementAxis Axis instance
$innerBoundings ezcGraphBoundings  

Redefinition of

Method Description
ezcGraphAxisLabelRenderer::renderLabels() Render Axis labels

Redefined in descendants as

Method Description
ezcGraphAxisRotatedBoxedLabelRenderer::renderLabels() Render Axis labels

renderLabelText

void renderLabelText( ezcGraphRenderer $renderer, ezcGraphChartElementAxis $axis, ezcGraphCoordinate $position, string $label, float $degTextAngle, float $labelLength, float $labelSize, float $lengthReducement )
Render label text.
Render the text of a single label, depending on the position, length and rotation of the label.

Parameters

Name Type Description
$renderer ezcGraphRenderer  
$axis ezcGraphChartElementAxis  
$position ezcGraphCoordinate  
$label string  
$degTextAngle float  
$labelLength float  
$labelSize float  
$lengthReducement float  

Last updated: Mon, 21 Dec 2009