RoundRectangle2D剪辑不是很平滑 [英] RoundRectangle2D clip is not very smooth
本文介绍了RoundRectangle2D剪辑不是很平滑的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个JPanel,我想剪一下角,使其边缘变圆.
I have a JPanel that i want to clip the corners so that it has rounded edge.
这就是我在做什么.
((Graphics2D)g).setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
g.setColor(color);
Shape s = new RoundRectangle2D.Double(0, 0, width, height, arc, arc);
g.setClip(s);
因此请注意,我正在将clipping
设置为RoundRectangle2D.我也设置anti-aliasing
,但我的圆角边缘确实是锯齿状的.
So notice that i am setting the clipping
to a RoundRectangle2D. Also i am setting anti-aliasing
still my rounded edges are really jagged.
软剪辑示例,此链接包含一个对图像进行柔软圆角处理的方法.如何将其应用于JPanel?
Soft clipping example this link has a way to do soft rounded edges for a image. How do i apply the same to a JPanel?
推荐答案
因为剪裁没有混叠,所以您会看到锯齿状的边缘.尝试边界:
because clipping is not aliased, you see the jagged edges. try a border instead:
p.setBorder(new RoundedBorder(p.getBackground(), 2, 16));
其中RoundedBorder改编自文本气泡类:
where RoundedBorder is adapted from the text bubble class:
class RoundedBorder extends AbstractBorder {
private Color color;
private int thickness = 4;
private int radii = 8;
private Insets insets = null;
private BasicStroke stroke = null;
private int strokePad;
private int pointerPad = 4;
RenderingHints hints;
RoundedBorder(
Color color, int thickness, int radii) {
this.thickness = thickness;
this.radii = radii;
this.color = color;
stroke = new BasicStroke(thickness);
strokePad = thickness / 2;
hints = new RenderingHints(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
int pad = radii + strokePad;
int bottomPad = pad + strokePad;
insets = new Insets(pad, pad, bottomPad, pad);
}
@Override
public Insets getBorderInsets(Component c) {
return insets;
}
@Override
public Insets getBorderInsets(Component c, Insets insets) {
return getBorderInsets(c);
}
@Override
public void paintBorder(
Component c,
Graphics g,
int x, int y,
int width, int height) {
Graphics2D g2 = (Graphics2D) g;
int bottomLineY = height - thickness;
RoundRectangle2D.Double bubble = new RoundRectangle2D.Double(
0 + strokePad,
0 + strokePad,
width - thickness,
bottomLineY,
radii,
radii);
Area area = new Area(bubble);
g2.setRenderingHints(hints);
Area spareSpace = new Area(new Rectangle(0, 0, width, height));
spareSpace.subtract(area);
g2.setClip(spareSpace);
g2.clearRect(0, 0, width, height);
g2.setClip(null);
g2.setColor(color);
g2.setStroke(stroke);
g2.draw(area);
}
}
}
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