CompressConfig.java

/*******************************************************************************
 * Copyright (c) 2008-2009 SWTChart project. All rights reserved. 
 * 
 * This code is distributed under the terms of the Eclipse Public License v1.0
 * which is available at http://www.eclipse.org/legal/epl-v10.html
 *******************************************************************************/
package org.swtchart.internal.compress;

/**
 * Configuration for compression.
 */
public class CompressConfig
{

    /** the width in pixels */
    private long widthInPixels;

    /** the height in pixels */
    private long heightInPixels;

    /** the lower value of X range */
    private double xLowerValue;

    /** the upper value of X range */
    private double xUpperValue;

    /** the lower value of Y range */
    private double yLowerValue;

    /** the upper value of Y range */
    private double yUpperValue;

    /** the state indicating whether the X axis is log scale */
    private boolean xLogScale;

    /** the state indicating whether the Y axis is log scale */
    private boolean yLogScale;

    /**
     * Constructor.
     */
    public CompressConfig ()
    {
        widthInPixels = 1024;
        heightInPixels = 512;
        xLogScale = false;
        yLogScale = false;
    }

    /**
     * Constructor.
     * 
     * @param config
     *            the configuration for compression
     */
    public CompressConfig ( CompressConfig config )
    {
        widthInPixels = config.getWidthInPixel ();
        heightInPixels = config.getHeightInPixel ();

        xLowerValue = config.getXLowerValue ();
        xUpperValue = config.getXUpperValue ();
        yLowerValue = config.getYLowerValue ();
        yUpperValue = config.getYUpperValue ();

        xLogScale = config.isXLogScale ();
        yLogScale = config.isYLogScale ();
    }

    /*
     * @see Object#equals(Object)
     */
    @Override
    public boolean equals ( Object obj )
    {
        if ( obj == null || ! ( obj instanceof CompressConfig ) )
        {
            return false;
        }

        CompressConfig config = (CompressConfig)obj;

        if ( widthInPixels != config.getWidthInPixel () || heightInPixels != config.getHeightInPixel () )
        {
            return false;
        }

        double diff = Math.abs ( xLowerValue - config.getXLowerValue () ) / ( xUpperValue - xLowerValue );
        if ( diff > 1.0 / widthInPixels )
        {
            return false;
        }

        diff = Math.abs ( xUpperValue - config.getXUpperValue () ) / ( xUpperValue - xLowerValue );
        if ( diff > 1.0 / widthInPixels )
        {
            return false;
        }

        diff = Math.abs ( yLowerValue - config.getYLowerValue () ) / ( yUpperValue - yLowerValue );
        if ( diff > 1.0 / heightInPixels )
        {
            return false;
        }

        diff = Math.abs ( yUpperValue - config.getYUpperValue () ) / ( yUpperValue - yLowerValue );
        if ( diff > 1.0 / heightInPixels )
        {
            return false;
        }

        if ( config.isXLogScale () != xLogScale )
        {
            return false;
        }

        if ( config.isYLogScale () != yLogScale )
        {
            return false;
        }

        return true;
    }

    /*
     * @see Object#hashCode()
     */
    @Override
    public int hashCode ()
    {
        assert false;
        return 0;
    }

    /**
     * Sets the size in pixels.
     * 
     * @param width
     *            the width in pixels
     * @param height
     *            the height in pixels
     */
    public void setSizeInPixel ( long width, long height )
    {
        widthInPixels = width;
        heightInPixels = height;
    }

    /**
     * Gets the width of plot area in pixels
     * 
     * @return the width of plot area in pixels
     */
    public long getWidthInPixel ()
    {
        return widthInPixels;
    }

    /**
     * Gets the height of plot area in pixels
     * 
     * @return the height of plot area in pixels
     */
    public long getHeightInPixel ()
    {
        return heightInPixels;
    }

    /**
     * Sets the X range.
     * 
     * @param lower
     *            the lower value of x range
     * @param upper
     *            the upper value of x range
     */
    public void setXRange ( double lower, double upper )
    {
        xLowerValue = lower;
        xUpperValue = upper;
    }

    /**
     * Sets the Y range.
     * 
     * @param lower
     *            the lower value of y range
     * @param upper
     *            the upper value of y range
     */
    public void setYRange ( double lower, double upper )
    {
        yLowerValue = lower;
        yUpperValue = upper;
    }

    /**
     * Gets the lower value of x range.
     * 
     * @return the lower value of x range
     */
    public double getXLowerValue ()
    {
        return xLowerValue;
    }

    /**
     * Gets the upper value of x range.
     * 
     * @return the upper value of x range
     */
    public double getXUpperValue ()
    {
        return xUpperValue;
    }

    /**
     * Gets the lower value of y range.
     * 
     * @return the lower value of y range
     */
    public double getYLowerValue ()
    {
        return yLowerValue;
    }

    /**
     * Gets the upper value of y range.
     * 
     * @return the upper value of y range
     */
    public double getYUpperValue ()
    {
        return yUpperValue;
    }

    /**
     * Gets the state indicating whether the X axis is log scale.
     * 
     * @return true if the X axis is log scale
     */
    public boolean isXLogScale ()
    {
        return xLogScale;
    }

    /**
     * Sets the state indicating whether the X axis is log scale.
     * 
     * @param value
     *            the state indicating whether the X axis is log scale
     */
    public void setXLogScale ( boolean value )
    {
        this.xLogScale = value;
    }

    /**
     * Gets the state indicating whether the Y axis is log scale.
     * 
     * @return true if the Y axis is log scale
     */
    public boolean isYLogScale ()
    {
        return yLogScale;
    }

    /**
     * Sets the state indicating whether the Y axis is log scale.
     * 
     * @param value
     *            the state indicating whether the Y axis is log scale
     */
    public void setYLogScale ( boolean value )
    {
        this.yLogScale = value;
    }

    /*
     * @see Object#toString()
     */
    @Override
    public String toString ()
    {
        return "pixelWidth = " + widthInPixels + ", " + "pixelHeight = " + heightInPixels + ", " + "xLowerValue = " + xLowerValue + ", " + "xUpperValue = " + xUpperValue + ", " + "yLowerValue = " + yLowerValue + ", " + "yUpperValue = " + yUpperValue + ", " + yLogScale;
    }
}