org.jfree.layouting.renderer.process

Class 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
ComputeMarginsStep()
Method Summary
voidcompute(LogicalPageBox root)
protected voidfinishBlockLevelBox(RenderBox box)
On our way out, compute the bottom and right margins as well.
protected voidprocessParagraphChilds(ParagraphRenderBox box)
protected booleanstartBlockLevelBox(RenderBox box)
This computes the top and left margin.

Constructor Detail

ComputeMarginsStep

public ComputeMarginsStep()

Method Detail

compute

public void compute(LogicalPageBox root)

finishBlockLevelBox

protected void finishBlockLevelBox(RenderBox box)
On our way out, compute the bottom and right margins as well.

Parameters: box

processParagraphChilds

protected void processParagraphChilds(ParagraphRenderBox box)

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.

Parameters: box