java的Intersect用法_Java Rectangle2D.intersect方法代码示例

import java.awt.geom.Rectangle2D; //导入方法依赖的package包/类

/**

* Damages the area surrounding the caret to cause

* it to be repainted in a new location. If paint()

* is reimplemented, this method should also be

* reimplemented. This method should update the

* caret bounds (x, y, width, and height).

*

* @param r the current location of the caret

* @see #paint

*/

@Override

protected synchronized void damage(final Rectangle r) {

if (r == null || fPainting) return;

x = r.x - 4;

y = r.y;

width = 10;

height = r.height;

// Don't damage the border area. We can't paint a partial border, so get the

// intersection of the caret rectangle and the component less the border, if any.

final Rectangle caretRect = new Rectangle(x, y, width, height);

final Border border = getComponent().getBorder();

if (border != null) {

final Rectangle alloc = getComponent().getBounds();

alloc.x = alloc.y = 0;

final Insets borderInsets = border.getBorderInsets(getComponent());

alloc.x += borderInsets.left;

alloc.y += borderInsets.top;

alloc.width -= borderInsets.left + borderInsets.right;

alloc.height -= borderInsets.top + borderInsets.bottom;

Rectangle2D.intersect(caretRect, alloc, caretRect);

}

x = caretRect.x;

y = caretRect.y;

width = Math.max(caretRect.width, 1);

height = Math.max(caretRect.height, 1);

repaint();

}