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/*
* IAxisScalePolicy.java of project jchart2d, .
* Copyright (C) 2002 - 2011, Achim Westermann, created on Apr 22, 2011
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* If you modify or optimize the code in a useful way please let me know.
* [email protected]
*
*
* File : $Source: /cvsroot/jchart2d/jchart2d/codetemplates.xml,v $
* Date : $Date: 2009/02/24 16:45:41 $
* Version: $Revision: 1.2 $
*/
package info.monitorenter.gui.chart;
import java.awt.Graphics;
import java.util.List;
public interface IAxisScalePolicy {
/**
* Returns the array of labeled values that will be used by the
* {@link Chart2D} to paint labels.
*
*
* @param g2d
* Provides information about the graphic context (e.g. font
* metrics).
*
* @param axis
* the axis to work for.
*
* @return the labeled values that will be used by the {@link Chart2D}
* to paint labels.
*/
public abstract List getScaleValues(final Graphics g2d, final IAxis axis);
/**
* Performs expensive calculations for various values that are used by many
* calls throughout a paint iterations.
*
* These values are constant throughout a paint iteration by the contract that
* no point is added removed or changed in this period. Because these values
* are used from many methods it is impossible to calculate them at a
* "transparent" method that may perform this caching over a paint period
* without knowledge from outside. The first method called in a paint
* iteration is called several further times in the iteration. So this is the
* common hook to invoke before painting a chart.
*
*
* @param axis
* the axis to read data from.
*/
public void initPaintIteration(final IAxis axis);
}