【发布时间】:2017-02-24 22:29:49
【问题描述】:
这是一个非常奇怪的错误,我似乎无法弄清楚。为了简化这一点,我有三个类:一个 Canvas 类(使用Graphics2D.draw() 绘制对象),然后是许多 ob 家具类,它们可以被视为一个类,因为它们所做的只是返回不同的形状。最后我有一个 CustomShape 类,它可以让我根据现有的其他形状创建一个新的形状。但是这些形状是在奇怪的地方绘制的。 x any y 坐标与绘制形状的位置不匹配。
壁橱.java:
public class Closet {
double x, y, width, height, rotation;
Color color;
Closet() {
this.x = X;
this.y = Y;
this.width = 40;
this.height = 40;
this.rotation = 0;
this.color = Color.blue;
}
public Shape getShape() {
GeneralPath closetShape = new GeneralPath();
closetShape.append(new Rectangle2D.Double(0, 0, width, height), false);
closetShape.moveTo(0 , 0);
closetShape.lineTo(width, height);
closetShape.moveTo(0, height);
closetShape.lineTo(width, 0);
// transform:
AffineTransform t = new AffineTransform();
t.translate(x, y);
Rectangle2D umriss = closetShape.getBounds2D();
t.rotate(Math.toRadians(rotation),umriss.getX()+umriss.getWidth()/2,umriss.getY()+umriss.getHeight()/2);
return t.createTransformedShape(closetShape);
}
}
CustomShape.java
public class CustomShape {
double x, y, width, height, rotation;
Color color;
private Closet[] c;
CustomShape(Closet... elements) {
this.m = elements;
GeneralPath path = new GeneralPath();
Closet[] newC = elements.clone();
Arrays.stream(newC).forEach(e -> path.append(e.getShape(), false));
this.x = path.getBounds2D().getX();
this.y = path.getBounds2D().getY();
this.width = path.getBounds2D().getWidth();
this.height = path.getBounds2D().getHeight();
this.rotation = 0;
this.color = Color.blue;
}
public Shape getShape() {
GeneralPath path = new GeneralPath();
Arrays.stream(c).forEach(e -> path.append(e.getShape(), false));
AffineTransform t = new AffineTransform();
t.translate(x, y);
Rectangle2D umriss = path.getBounds2D();
t.rotate(Math.toRadians(rotation),umriss.getX()+umriss.getWidth()/2,umriss.getY()+umriss.getHeight()/2);
return t.createTransformedShape(path);
}
}
【问题讨论】:
-
更改 Graphics2D 平移/旋转而不是在形状内进行平移和旋转不是更好吗?这样,形状可以保持不变,您无需每次都创建新形状。