PropertiesMetalTheme.java

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/*
 * This source code is provided to illustrate the usage of a given feature
 * or technique and has been deliberately simplified. Additional steps
 * required for a production-quality application, such as security checks,
 * input validation and proper error handling, might not be present in
 * this sample code.
 */



import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.StringTokenizer;

import javax.swing.plaf.ColorUIResource;
import javax.swing.plaf.metal.DefaultMetalTheme;


/**
 * This class allows you to load a theme from a file.
 * It uses the standard Java Properties file format.
 * To create a theme you provide a text file which contains
 * tags corresponding to colors of the theme along with a value
 * for that color.  For example:
 *
 * name=My Ugly Theme
 * primary1=255,0,0
 * primary2=0,255,0
 * primary3=0,0,255
 *
 * This class only loads colors from the properties file,
 * but it could easily be extended to load fonts -  or even icons.
 *
 * @author Steve Wilson
 * @author Alexander Kouznetsov
 */
public class PropertiesMetalTheme extends DefaultMetalTheme {

    private String name = "Custom Theme";
    private ColorUIResource primary1;
    private ColorUIResource primary2;
    private ColorUIResource primary3;
    private ColorUIResource secondary1;
    private ColorUIResource secondary2;
    private ColorUIResource secondary3;
    private ColorUIResource black;
    private ColorUIResource white;

    /**
     * pass an inputstream pointing to a properties file.
     * Colors will be initialized to be the same as the DefaultMetalTheme,
     * and then any colors provided in the properties file will override that.
     */
    public PropertiesMetalTheme(InputStream stream) {
        initColors();
        loadProperties(stream);
    }

    /**
     * Initialize all colors to be the same as the DefaultMetalTheme.
     */
    private void initColors() {
        primary1 = super.getPrimary1();
        primary2 = super.getPrimary2();
        primary3 = super.getPrimary3();

        secondary1 = super.getSecondary1();
        secondary2 = super.getSecondary2();
        secondary3 = super.getSecondary3();

        black = super.getBlack();
        white = super.getWhite();
    }

    /**
     * Load the theme name and colors from the properties file
     * Items not defined in the properties file are ignored
     */
    private void loadProperties(InputStream stream) {
        Properties prop = new Properties();
        try {
            prop.load(stream);
        } catch (IOException e) {
            System.out.println(e);
        }

        Object tempName = prop.get("name");
        if (tempName != null) {
            name = tempName.toString();
        }

        Object colorString = null;

        colorString = prop.get("primary1");
        if (colorString != null) {
            primary1 = parseColor(colorString.toString());
        }

        colorString = prop.get("primary2");
        if (colorString != null) {
            primary2 = parseColor(colorString.toString());
        }

        colorString = prop.get("primary3");
        if (colorString != null) {
            primary3 = parseColor(colorString.toString());
        }

        colorString = prop.get("secondary1");
        if (colorString != null) {
            secondary1 = parseColor(colorString.toString());
        }

        colorString = prop.get("secondary2");
        if (colorString != null) {
            secondary2 = parseColor(colorString.toString());
        }

        colorString = prop.get("secondary3");
        if (colorString != null) {
            secondary3 = parseColor(colorString.toString());
        }

        colorString = prop.get("black");
        if (colorString != null) {
            black = parseColor(colorString.toString());
        }

        colorString = prop.get("white");
        if (colorString != null) {
            white = parseColor(colorString.toString());
        }

    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    protected ColorUIResource getPrimary1() {
        return primary1;
    }

    @Override
    protected ColorUIResource getPrimary2() {
        return primary2;
    }

    @Override
    protected ColorUIResource getPrimary3() {
        return primary3;
    }

    @Override
    protected ColorUIResource getSecondary1() {
        return secondary1;
    }

    @Override
    protected ColorUIResource getSecondary2() {
        return secondary2;
    }

    @Override
    protected ColorUIResource getSecondary3() {
        return secondary3;
    }

    @Override
    protected ColorUIResource getBlack() {
        return black;
    }

    @Override
    protected ColorUIResource getWhite() {
        return white;
    }

    /**
     * parse a comma delimited list of 3 strings into a Color
     */
    private ColorUIResource parseColor(String s) {
        int red = 0;
        int green = 0;
        int blue = 0;
        try {
            StringTokenizer st = new StringTokenizer(s, ",");

            red = Integer.parseInt(st.nextToken());
            green = Integer.parseInt(st.nextToken());
            blue = Integer.parseInt(st.nextToken());

        } catch (Exception e) {
            System.out.println(e);
            System.out.println("Couldn't parse color :" + s);
        }

        return new ColorUIResource(red, green, blue);
    }
}