仅一侧的圆形边框为java
我只需要在组件的一侧创建圆形边框 此代码创建圆形边框:仅一侧的圆形边框为java,java,swing,border,Java,Swing,Border,我只需要在组件的一侧创建圆形边框 此代码创建圆形边框: new LineBorder(Color.RED, 3, true) 我已经了解了如何创建只能在组件一侧使用的无光边框,但是无光边框不是圆形的 有可能只在一侧有一个圆形边界吗 编辑: 我尝试过使用复合边框,如下所示: cell.setBorder(BorderFactory.createCompoundBorder( new LineBorder(borderColor, 3, true), B
new LineBorder(Color.RED, 3, true)
我已经了解了如何创建只能在组件一侧使用的无光边框,但是无光边框不是圆形的
有可能只在一侧有一个圆形边界吗
编辑:
我尝试过使用复合边框,如下所示:
cell.setBorder(BorderFactory.createCompoundBorder(
new LineBorder(borderColor, 3, true),
BorderFactory.createMatteBorder(0, 3, 0, 0, Color.black)));
但它不起作用…
LineBorder
只支持圆角或不支持圆角。复合边框(正如JavaDoc所述)使用一个边框表示外部,一个边框表示内部,因此不区分左/右或上/下
恐怕您必须编写自己的
边框
实现,或者寻找其他人已经制作的实现(外部库)。您可以覆盖LineBorder方法并在那里绘制所需的所有内容
来自LineBorder的源
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
Color oldColor = g.getColor();
int i;
/// PENDING(klobad) How/should do we support Roundtangles?
g.setColor(lineColor);
for(i = 0; i < thickness; i++) {
if(!roundedCorners)
g.drawRect(x+i, y+i, width-i-i-1, height-i-i-1);
else
SET CLIP HERE TO DRAW ONLY NECESSARY PART
g.drawRoundRect(x+i, y+i, width-i-i-1, height-i-i-1, thickness, thickness);
}
g.setColor(oldColor);
}
public void paintBorder(组件c、图形g、整数x、整数y、整数宽度、整数高度){
Color oldColor=g.getColor();
int i;
///未决(klobad)我们如何/应该支持Roundtangles?
g、 setColor(lineColor);
对于(i=0;i
下面是一个关于如何使用图形2d#clipRect()
的示例。
这段代码只保留了两个右圆角,在左边有正常的边框。如上所述,您必须在自定义LineBorder
中使用此代码
Graphics2D g2d = (Graphics2D) g;
g2d.clipRect(150, 10, 100, 100);
g2d.draw(new RoundRectangle2D.Double(100, 10, 80, 30, 15, 15));
g2d.setClip(null);
g2d.clipRect(100, 10, 50, 100);
g2d.draw(new Rectangle2D.Double(100, 10, 80, 30));
举个例子,
JPanel content=newjpanel();
content.setboorder(BorderFactory.createEmptyBorder(1,30,1,1))代码>relatingg.drawRoundRect(…)
在我看来并不琐碎。但这是一个开始——你必须分别绘制圆角和边。@Thomas说起来容易做起来难:p我无法用圆弧绘制圆角。我一直在努力,但还没有成功。正如我所说,这不是小事,意思是“没那么容易”:(比如大卫+1@David没有什么对你不利的,但是在你上一篇文章中,我认为你没有看到森林而不是树木:-),java.awt.Border默认有四条边,我在一些线程中看到了关于如何从positions(北/南/西/东)提取/更改/着色特定边框的主题,以及另一个…当我使用它覆盖paintBorder时,代码不会绘制圆形边框(
public static final int TOP_LEFT = 1;
public static final int TOP_RIGHT = 2;
public static final int BOTTOM_LEFT = 4;
public static final int BOTTOM_RIGHT = 8;
public static final int ALL_CORNERS = TOP_LEFT + TOP_RIGHT + BOTTOM_LEFT + BOTTOM_RIGHT;
public static void drawRoundRect(Graphics g, Color fillColor, Color borderColor, int x, int y, int width, int height, int radius, int cornerMask)
{
// // XXX Old code (without selectively disabled round corners):
// if (fillColor != null)
// {
// og.setColor(fillColor);
// og.fillRoundRect(x, y, width - 1, height - 1, radius, radius);
// }
// if (borderColor != null && !borderColor.equals(fillColor))
// {
// og.setColor(borderColor);
// og.drawRoundRect(x, y, width - 1, height - 1, radius, radius);
// }
radius += radius % 2; // so we don't have to deal with rounding issues for odd numbers
int radiusHalf = radius / 2;
width--;
height--;
if (fillColor != null)
{
g.setColor(fillColor);
// og.fillRoundRect(x, y, width - 1, height - 1, radius, radius);
if ((cornerMask & TOP_LEFT) > 0)
{
g.fillArc(x, y, radius, radius, 90, 90);
}
else
{
g.fillRect(x, y, radiusHalf, radiusHalf);
}
if ((cornerMask & TOP_RIGHT) > 0)
{
g.fillArc(x + width - radius, y, radius, radius, 0, 90);
}
else
{
g.fillRect(x + width - radiusHalf, y, radiusHalf, radiusHalf);
}
if ((cornerMask & BOTTOM_RIGHT) > 0)
{
g.fillArc(x + width - radius, y + height - radius, radius, radius, 270, 90);
}
else
{
g.fillRect(x + width - radiusHalf, y + height - radiusHalf, radiusHalf, radiusHalf);
}
if ((cornerMask & BOTTOM_LEFT) > 0)
{
g.fillArc(x, y + height - radius, radius, radius, 180, 90);
}
else
{
g.fillRect(x, y + height - radiusHalf, radiusHalf, radiusHalf);
}
g.fillRect(x + radiusHalf, y, width - radius, radiusHalf);
g.fillRect(x + radiusHalf, y + height - radiusHalf, width - radius, radiusHalf);
g.fillRect(x, y + radiusHalf, radiusHalf, height - radius);
g.fillRect(x + width - radiusHalf, y + radiusHalf, radiusHalf, height - radius);
g.fillRect(x + radiusHalf, y + radiusHalf, width - radius, height - radius);
}
if (borderColor != null && !borderColor.equals(fillColor))
{
g.setColor(borderColor);
// XXX: there are problems with this when using semi-transparent colors + borderSize > 1
// XXX: this could be changed to to use ONE draw action using drawShape with GeneralPath.curveTo()
// XXX: this then could also be used to FILL the shape (see above)
if ((cornerMask & TOP_LEFT) > 0)
{
g.drawArc(x, y, radius, radius, 90, 90);
}
else
{
g.drawLine(x, y, x + radiusHalf, y);
g.drawLine(x, y, x, y + radiusHalf);
}
if ((cornerMask & TOP_RIGHT) > 0)
{
g.drawArc(x + width - radius, y, radius, radius, 0, 90);
}
else
{
g.drawLine(x + width - radiusHalf, y, x + width, y);
g.drawLine(x + width, y, x + width, y + radiusHalf);
}
if ((cornerMask & BOTTOM_RIGHT) > 0)
{
g.drawArc(x + width - radius, y + height - radius, radius, radius, 270, 90);
}
else
{
g.drawLine(x + width - radiusHalf, y + height, x + width, y + height);
g.drawLine(x + width, y + height - radiusHalf, x + width, y + height);
}
if ((cornerMask & BOTTOM_LEFT) > 0)
{
g.drawArc(x, y + height - radius, radius, radius, 180, 90);
}
else
{
g.drawLine(x, y + height, x + radiusHalf, y + height);
g.drawLine(x, y + height - radiusHalf, x, y + height);
}
g.drawLine(x + radiusHalf, y, x + width - radiusHalf, y); // top
g.drawLine(x + width, y + radiusHalf, x + width, y + height - radiusHalf); // right
g.drawLine(x + radiusHalf, y + height, x + width - radiusHalf, y + height); // bottom
g.drawLine(x, y + radiusHalf, x, y + height - radiusHalf); // left
}
}