listcolour.java

FuncPlotter is a combined Java application and applet for displaying two-dimensional plots of explic

/*====================================================================*\

ListColour.java

List colour enumeration.

------------------------------------------------------------------------

This file is part of FuncPlotter, a combined Java application and applet
for plotting explicit functions in one variable.
Copyright 2005-2007 Andy Morgan-Richards.

FuncPlotter is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.

This program 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
General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program.  If not, see <http://www.gnu.org/licenses/>.

\*====================================================================*/


// PACKAGE


package gui;

//----------------------------------------------------------------------


// IMPORTS


import java.awt.Color;

import javax.swing.UIManager;

//----------------------------------------------------------------------


// LIST COLOUR ENUMERATION


public enum ListColour
{

////////////////////////////////////////////////////////////////////////
//  Constants
////////////////////////////////////////////////////////////////////////

    BACKGROUND          ( "background",             new Color( 240, 240, 232 ) ),
    SELECTION_BACKGROUND( "selectionBackground",    new Color( 176, 192, 208 ) ),
    FOREGROUND          ( "foreground",             Color.BLACK ),
    SELECTION_FOREGROUND( "selectionForeground",    Color.BLACK );

    private static final    String  KEY_PREFIX  = "List.";

////////////////////////////////////////////////////////////////////////
//  Constructors
////////////////////////////////////////////////////////////////////////

    private ListColour( String key,
                        Color  defaultColour )
    {
        this.key = key;
        this.defaultColour = defaultColour;
    }

    //------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////
//  Class methods
////////////////////////////////////////////////////////////////////////

    private static void init( )
    {
        int numColours = 0;
        Color[] colours = new Color[values( ).length];
        for ( int i = 0; i < colours.length; ++i )
        {
            colours[i] = UIManager.getColor( KEY_PREFIX + values( )[i].key );
            if ( colours[i] == null )
                break;
            ++numColours;
        }

        for ( int i = 0; i < colours.length; ++i )
        {
            ListColour value = values( )[i];
            value.colour = (numColours == values( ).length) ? colours[i] : value.defaultColour;
        }
    }

    //------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////
//  Instance methods
////////////////////////////////////////////////////////////////////////

    public Color getColour( )
    {
        if ( colour == null )
            init( );
        return colour;
    }

    //------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////
//  Instance variables
////////////////////////////////////////////////////////////////////////

    private String  key;
    private Color   defaultColour;
    private Color   colour;

}

//----------------------------------------------------------------------