package com.cs.ff;
import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Arc2D;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
* 绘制3D效果的饼图
*
* @author Biao
*/
@SuppressWarnings("serial")
public class Z3 extends JPanel {
private double[] data; // 在饼图中显示的数据
private Color[] defaultColors; // 预定义饼图的颜色
private Z2[] pies;
private int shadowDepth = 8;
private int shiftAngle = -30;
private int selectedPieIndex = -1; // 鼠标点击是选中的Arc, -1为没有选中
public Z3() {
data = new double[] { 20.72, 6.56, 3.74, 10.26, 15.38, 5.69, 10.72, 15.38, 6.15, 18.0 };
defaultColors = createColors();
int x = 50;
int y = 50;
int w = 380;
int h = (int) (w * 0.618); // 黄金分割
pies = createPies(x, y, w, h, shadowDepth, shiftAngle, data, defaultColors);
// 取得鼠标选中的饼图的下标
addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
selectedPieIndex = -1;
for (int i = 0; i < pies.length; ++i) {
if (pies[i].getArc().contains(e.getX(), e.getY())) {
selectedPieIndex = i;
break;
}
}
repaint();
}
});
}
private Color[] createColors() {
// 返回16进制的值颜色
List<Color> colors = new ArrayList<Color>();
colors.add(Color.decode("#FF7321"));
colors.add(Color.decode("#169800"));
colors.add(Color.decode("#00E500"));
colors.add(Color.decode("#D0F15A"));
colors.add(Color.decode("#AA6A2D"));
colors.add(Color.decode("#BFDD89"));
colors.add(Color.decode("#E2FF55"));
colors.add(Color.decode("#D718A5"));
colors.add(Color.decode("#00DBFF"));
colors.add(Color.decode("#00FF00"));
return colors.toArray(new Color[0]);
}
public static Z2[] createPies(int x,
int y,
int w,
int h,
int shadowDepth,
double shiftAngle,
double[] data,
Color[] colors) {
double sum = 0;
for (double d : data) {
sum += d;
}
// 初始化Pies
double arcAngle = 0;
double startAngle = shiftAngle;
Z2[] pies = new Z2[data.length];
for (int i = 0; i < data.length; ++i) {
arcAngle = data[i] * 360 / sum; // 使用百分比计算角度
if (i + 1 == data.length) {
arcAngle = 360 + shiftAngle - startAngle; // 保证闭合
arcAngle = arcAngle > 0 ? arcAngle : 0;
}
Arc2D.Double arc = new Arc2D.Double(x, y, w, h, startAngle, arcAngle, Arc2D.PIE);
pies[i] = new Z2(arc, colors[i % colors.length], data[i], shadowDepth, 30);
startAngle += arcAngle;
}
return pies;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
if (pies != null) {
drawPies(g2d, pies, selectedPieIndex);
}
}
private void drawPies(Graphics2D g2d, Z2[] pies, int selectedIndex) {
int startIndex = 0; // 从第几个饼图开始绘制
int endIndex = pies.length; // 要画的饼图的数量.
boolean closed = (endIndex - startIndex == pies.length) ? true : false;
boolean selected = (selectedIndex >= startIndex && selectedIndex < endIndex) ? true : false;
FontMetrics metrics = g2d.getFontMetrics();
// 一次性绘制完3D效果，然后再绘制饼图的效果比绘制饼图的同时绘制好
for (int i = startIndex; i < endIndex; ++i) {
if (i != selectedIndex) {
Z2 p = pies[i];
g2d.setColor(p.getColor().darker());
g2d.fill(p.getFrontSite());
}
}
// 如果没有闭合时，且选中的不是第一块，则第一块画左面
if (!closed && selectedIndex != startIndex) {
g2d.setColor(pies[startIndex].getColor().darker());
g2d.fill(pies[startIndex].getLeftSite());
}
// 如果没有闭合时，且选中的不是最后一块，则最后一块画右面
if (!closed && selectedIndex + 1 != endIndex) {
g2d.setColor(pies[endIndex - 1].getColor().darker());
g2d.fill(pies[endIndex - 1].getRightSite());
}
// 有饼图被选中
if (selected) {
int prevIndex = selectedIndex > startIndex ? (selectedIndex - 1) : endIndex - 1;
int nextIndex = (selectedIndex + 1) >= endIndex ? startIndex : (selectedIndex + 1);
// 前一个画右墙
g2d.setColor(pies[prevIndex].getColor().darker());
g2d.fill(pies[prevIndex].getRightSite());
// 后一个画左墙
g2d.setColor(pies[nextIndex].getColor().darker());
g2d.fill(pies[nextIndex].getLeftSite());
}
// 最后再绘制饼图的上面部分，把不需要的部分隐藏掉
for (int i = startIndex; i < endIndex; ++i) {
if (i != selectedIndex) {
Z2 p = pies[i];
g2d.setColor(p.getColor());
g2d.fill(p.getArc());
int sw = metrics.stringWidth(p.getLabel()) / 2;
int sh = (metrics.getAscent()) / 2;
int x = (int) (p.getLabelPosition().getX() - sw);
int y = (int) (p.getLabelPosition().getY() + sh);
g2d.setColor(Color.BLACK);
g2d.drawString(p.getLabel(), x, y);
}
}
// 绘制被选中的饼图
if (selected) {
Z2 p = pies[selectedIndex].getSelectedPie();
g2d.setColor(p.getColor().darker());
g2d.fill(p.getFrontSite());
g2d.fill(p.getLeftSite());
g2d.fill(p.getRightSite());
g2d.setColor(p.getColor());
g2d.fill(p.getArc());
int sw = metrics.stringWidth(p.getLabel()) / 2;
int sh = (metrics.getAscent()) / 2;
int x = (int) (p.getLabelPosition().getX() - sw);
int y = (int) (p.getLabelPosition().getY() + sh);
g2d.setColor(Color.BLACK);
g2d.drawString(p.getLabel(), x, y);
}
}
private static void createGuiAndShow() {
JFrame frame = new JFrame("Pie with 3D Effect");
frame.getContentPane().add(new Z3());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
int sw = Toolkit.getDefaultToolkit().getScreenSize().width;
int sh = Toolkit.getDefaultToolkit().getScreenSize().height;
int w = 500;
int h = 400;
int x = (sw - w) / 2;
int y = (sh - h) / 2 - 40;
x = x > 0 ? x : 0;
y = y > 0 ? y : 0;
frame.setBounds(x, y, w, h);
frame.setVisible(true);
}
public static void main(String[] args) {
createGuiAndShow();
}
}
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