我有代码来绘制带有值和随机颜色的饼图。现在我想旋转整个图形，而不是一块馅饼。这是我的代码：
class Slice{
double value;
Color color;
public Slice(double _value){
this.value = _value;
}
public void setColor(Color _color){
this.color = _color;
}
}
class Component extends JComponent implements MouseListener{
int movx = 0;
int movy = 0;
Slice[] slice = {new Slice(5),new Slice(20),new Slice(33),new Slice(55)};
public Component(){
addMouseListener(this);
}
public void paint(Graphics g){
Graphics2D g2 = (Graphics2D)g;
drawPie(g2, getBounds(), slice);
}
public void drawPie(Graphics2D g, Rectangle area, Slice[] s){
double total = 0.0D;
//calculate total value
for(int i=0;i<s.length;i++)
total+=s[i].value;
double curentValue = 0.0D;
int startAngle = 0;
for(int i = 0;i<s.length;i++){
Random numGen = new Random();
s[i].setColor(new Color(numGen.nextInt(256), numGen.nextInt(256), numGen.nextInt(256)));
startAngle = (int)((curentValue*360)/total);
int arcAngle = (int)((s[i].value*360)/total) ;
g.setColor(s[i].color);
g.rotate(30);//row AA
g.fillArc(area.x, area.y, area.width, area.height, startAngle, arcAngle);
curentValue+=s[i].value;
}
}
@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
movx = e.getX();
movy = e.getY();
repaint();
}
// unimplemented Mouse methods removed
}
public class PieChart {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
JFrame frame = new JFrame();
frame.getContentPane().add(new Component());
frame.setSize(300,200);
frame.setVisible(true);
}
}
我在AA行写rotate的时候不能正常工作？你能帮助我吗？如何旋转整个图表？