trinaglesquarewindowscornericon.java

《SWING HACKS》源码 作者: Joshua Marinacci,Chris Adamson 著 徐晔 译 出版: 2007年2月

import javax.swing.*;
import java.awt.*;

/**
 * Created by IntelliJ IDEA.
 * User: Jonathan Simon
 * Date: Oct 5, 2004
 * Time: 6:03:57 PM
 * To change this template use File | Settings | File Templates.
 */
public class TrinagleSquareWindowsCornerIcon implements Icon {

    //RGB values discovered using ZoomIn
    private static final Color THREE_D_EFFECT_COLOR = new Color(255, 255, 255);
    private static final Color SQUARE_COLOR_LEFT = new Color(184, 180, 163);
    private static final Color SQUARE_COLOR_TOP_RIGHT = new Color(184, 180, 161);
    private static final Color SQUARE_COLOR_BOTTOM_RIGHT = new Color(184, 181, 161);

    //Dimensions
    private static final int WIDTH = 12;
    private static final int HEIGHT = 12;



    public int getIconHeight() {
        return WIDTH;
    }

    public int getIconWidth() {
        return HEIGHT;
    }

    public void paintIcon(Component c, Graphics g, int x, int y) {

        //Layout a row and column "grid"
        int firstRow = 0;
        int firstColumn = 0;
        int rowDiff = 4;
        int columnDiff = 4;

        int secondRow = firstRow + rowDiff;
        int secondColumn = firstColumn + columnDiff;
        int thirdRow = secondRow + rowDiff;
        int thirdColumn = secondColumn + columnDiff;


        //Draw the white squares first, so the gray squares will overlap
        draw3dSquare(g, firstColumn+1, thirdRow+1);

        draw3dSquare(g, secondColumn+1, secondRow+1);
        draw3dSquare(g, secondColumn+1, thirdRow+1);

        draw3dSquare(g, thirdColumn+1, firstRow+1);
        draw3dSquare(g, thirdColumn+1, secondRow+1);
        draw3dSquare(g, thirdColumn+1, thirdRow+1);

        //draw the gray squares overlapping the white background squares
        drawSquare(g, firstColumn, thirdRow);

        drawSquare(g, secondColumn, secondRow);
        drawSquare(g, secondColumn, thirdRow);

        drawSquare(g, thirdColumn, firstRow);
        drawSquare(g, thirdColumn, secondRow);
        drawSquare(g, thirdColumn, thirdRow);

    }

    private void draw3dSquare(Graphics g, int x, int y){
        Color oldColor = g.getColor(); //cache the old color
        g.setColor(THREE_D_EFFECT_COLOR); //set the white color
        g.fillRect(x,y,2,2); //draw the square
        g.setColor(oldColor); //reset the old color
    }


    private void drawSquare(Graphics g, int x, int y){
        Color oldColor = g.getColor();
        g.setColor(SQUARE_COLOR_LEFT);
        g.drawLine(x,y, x,y+1);
        g.setColor(SQUARE_COLOR_TOP_RIGHT);
        g.drawLine(x+1,y, x+1,y);
        g.setColor(SQUARE_COLOR_BOTTOM_RIGHT);
        g.drawLine(x+1,y+1, x+1,y+1);
        g.setColor(oldColor);
    }

}