shadowborder.java

电力系统紧急控制仿真平台 包括DSA控制平台、紧急控制平台、紧急解列控制平台三个模块。

package com.ht.dsa;

import javax.swing.border.Border;
import java.awt.*;
import java.awt.geom.GeneralPath;

/**
 * Created by IntelliJ IDEA.
 *
 * @author Dong Shufeng
 *         Date: 2008-11-5
 */
public class ShadowBorder implements Border {

    int borderWidth = 8;
    Color inter = Color.LIGHT_GRAY;

    public ShadowBorder(int borderWidth) {
        this.borderWidth = borderWidth;
    }

    public ShadowBorder(int borderWidth, Color inter) {
        this.borderWidth = borderWidth;
        this.inter = inter;
    }

    public ShadowBorder(Color inter) {
        this.inter = inter;
    }

    public ShadowBorder() {
    }

    private static Color getMixedColor(Color c1, float pct1, Color c2, float pct2) {
        float[] clr1 = c1.getComponents(null);
        float[] clr2 = c2.getComponents(null);
        for (int i = 0; i < clr1.length; i++) {
            clr1[i] = (clr1[i] * pct1) + (clr2[i] * pct2);
        }
        return new Color(clr1[0], clr1[1], clr1[2], clr1[3]);
    }

    private Shape createClipShape(float x1, float y1, float width, float height) {
        float x2 = x1 + width;
        float y2 = y1 + height;
        float adj = 3.0f; //帮助圆化类锐的拐角
        float arc = 8.0f;
        GeneralPath gp = new GeneralPath();
        gp.moveTo(x1 - adj, y1 + adj);
        gp.quadTo(x1, y1, x1 + adj, y1);
        gp.lineTo(x2 - arc, y1);
        gp.quadTo(x2, y1, x2, y1 + arc);
        gp.lineTo(x2, y2 - arc);
        gp.quadTo(x2, y2, x2 - arc, y2);
        gp.lineTo(x1 + adj, y2);
        gp.quadTo(x1, y2, x1, y2 - adj);
        gp.closePath();
        return gp;
    }

    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
        Graphics2D g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        int x1,y1;
        float w,h;
        Color outer = c.getBackground();
        //Color outer = Color.WHITE;
        for (int i = borderWidth; i >= 2; i -= 2) {
            x1 = x + (borderWidth - i);
            y1 = y + (borderWidth - i);
            w = (float)width - 2.0f * ((float)(borderWidth) - (float)i);
            h = (float)height - 2.0f * ((float)(borderWidth) - (float)i);
            float pct = (float) (borderWidth - i) / (borderWidth - 1);
            g2.setColor(getMixedColor(inter, pct, outer, 1.0f - pct));
            g2.setStroke(new BasicStroke(i));
            g2.draw(createClipShape(x1, y1, w, h));
        }
    }

    public Insets getBorderInsets(Component c) {
        return new Insets(borderWidth, borderWidth, borderWidth, borderWidth);
    }

    public boolean isBorderOpaque() {
        return false;
    }

    public int getBorderWidth() {
        return borderWidth;
    }

    public void setBorderWidth(int borderWidth) {
        this.borderWidth = borderWidth;
    }

    public Color getInter() {
        return inter;
    }

    public void setInter(Color inter) {
        this.inter = inter;
    }
}