com.eliad.model
Interface DirectSpanModel

All Known Implementing Classes:

AbstractDirectSpanModel

public interface DirectSpanModel

extends SpanModel

This interface should be implemented by SpanModels that do not need to maintain data structures to know where the spans are, but are able to answer a question about the presence of a span at some point in O(1) time, using some procedural rules.

Version:

1.0 05/09/00

Author:

Patrick Mérissert-Coffinières

Method Summary

ExtentCell	getSpanOver(int row, int column) Obtains a Rectangle representing the bounds of the span overlapping the cell at row, column.
boolean	isEmpty() Returns true only if there is no span in the model

Methods inherited from interface com.eliad.model.SpanModel

addSpanModelListener, removeSpanModelListener

Method Detail

getSpanOver

public ExtentCell getSpanOver(int row,
                              int column)

Obtains a Rectangle representing the bounds of the span overlapping the cell at row, column.

There should be only one answer for a given row, cell.

Parameters:

row - the row of a cell

column - the column a cell

Returns:

the description of the span containing this cell, null if there is none

isEmpty

public boolean isEmpty()

Returns true only if there is no span in the model