org.jfree.layouting.renderer.process

Class ComputeMarginsStep

java.lang.Object

org.jfree.layouting.renderer.process.IterateVisualProcessStep

org.jfree.layouting.renderer.process.ComputeMarginsStep

public class ComputeMarginsStep
extends IterateVisualProcessStep

This semi-dynamic step computes the effective margins. It requires that the model is fully computed and that all structural errors have been resolved.

Computing the effective margins is a recursive computation. It depends on the already evaluated effective margin of the parent (for top margins), the predecessor and parent (for left) and the last child (for bottom and right margins). Todo: Some better change management. Right now everything is recomputed all the time. Margins eat 10% of the total time ..

Author:

Thomas Morgner

Constructor Summary

Constructors

Constructor and Description
ComputeMarginsStep()

Method Summary

Modifier and Type	Method and Description
void	compute(LogicalPageBox root)
protected void	finishBlockLevelBox(RenderBox box) On our way out, compute the bottom and right margins as well.
protected void	processParagraphChilds(ParagraphRenderBox box)
protected boolean	startBlockLevelBox(RenderBox box) This computes the top and left margin.

Methods inherited from class org.jfree.layouting.renderer.process.IterateVisualProcessStep

finishInlineLevelBox, processBlockLevelChild, processBlockLevelNode, processBoxChilds, processFlow, processInlineLevelChild, processInlineLevelNode, processOtherLevelChild, startInlineLevelBox, startProcessing

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ComputeMarginsStep

public ComputeMarginsStep()

Method Detail

compute

public void compute(LogicalPageBox root)

processParagraphChilds

protected void processParagraphChilds(ParagraphRenderBox box)

Specified by:

processParagraphChilds in class IterateVisualProcessStep

startBlockLevelBox

protected boolean startBlockLevelBox(RenderBox box)

This computes the top and left margin. The effective margin is always zero, if the box has no parent at all.

Overrides:

startBlockLevelBox in class IterateVisualProcessStep

Parameters:

box -

finishBlockLevelBox

protected void finishBlockLevelBox(RenderBox box)

On our way out, compute the bottom and right margins as well.

Overrides:

finishBlockLevelBox in class IterateVisualProcessStep

Parameters:

box -