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

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

finishBlockLevelBox, finishInlineLevelBox, processBlockLevelChild, processBlockLevelNode, processBoxChilds, processFlow, processInlineLevelChild, processInlineLevelNode, processOtherLevelChild, processParagraphChilds, startBlockLevelBox, startInlineLevelBox, startProcessing

Constructor Details

ComputeMarginsStep

public ComputeMarginsStep()

Method Details

compute

public void compute(LogicalPageBox root)

finishBlockLevelBox

protected void finishBlockLevelBox(RenderBox box)
On our way out, compute the bottom and right margins as well.
Overrides:
finishBlockLevelBox in interface IterateVisualProcessStep
Parameters:
box -

processParagraphChilds

protected void processParagraphChilds(ParagraphRenderBox box)
Overrides:
processParagraphChilds in interface 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 interface IterateVisualProcessStep
Parameters:
box -