我目前正在开发一个Java/Swing项目,而且我在自定义过程中遇到了问题。
我已经扩展了JToolTip并重写了paint()方法来绘制自己的工具提示,但我无法去掉工具提示周围的背景。
这是
我已经扩展了JToolTip并重写了paint()方法来绘制自己的工具提示,但我无法去掉工具提示周围的背景。
这是
paint()
的覆盖内容:/* (non-Javadoc)
* @see javax.swing.JComponent#paint(java.awt.Graphics)
*/
@Override
public void paint(Graphics g) {
String text = getComponent().getToolTipText();
if (text != null && text.trim().length() > 0) {
// set the parent to not be opaque
Component parent = this.getParent();
if (parent != null) {
if (parent instanceof JComponent) {
JComponent jparent = (JComponent) parent;
if (jparent.isOpaque()) {
jparent.setOpaque(false);
}
}
}
// create a round rectangle
Shape round = new RoundRectangle2D.Float(4, 4, this.getWidth() - 1 - 8, this.getHeight() - 1 - 8, 8, 8);
// draw the background
Graphics2D g2 = (Graphics2D) g.create();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.setColor(getBackground());
g2.fill(round);
// draw the left triangle
Point p1 = new Point(4, 10);
Point p2 = new Point(4, 20);
Point p3 = new Point(0, 15);
int[] xs = {p1.x, p2.x, p3.x};
int[] ys = {p1.y, p2.y, p3.y};
Polygon triangle = new Polygon(xs, ys, xs.length);
g2.fillPolygon(triangle);
// draw the text
int cHeight = getComponent().getHeight();
FontMetrics fm = g2.getFontMetrics();
g2.setColor(getForeground());
if (cHeight > getHeight())
g2.drawString(text, 10, (getHeight() + fm.getAscent()) / 2);
else
g2.drawString(text, 10, (cHeight + fm.getAscent()) / 2);
g2.dispose();
}
}
这是我想要移除的(白色)背景:
我在OSX下运行java 1.7.0_05。
super.paint
绘制的吗? - dacwesuper.paint
,但删除它没有任何效果,不幸的是。 - user1478292