/**
* We generally draw lines to/from the <I>center</I> of components; this method finds the center
* of the argument's enclosing rectangle
*
* @return Point at the center of <CODE>c</CODE>
* @param c The component whose center point we wish to determine
*/
protected Point getCenterLocation(Component c) {
Point p1 = new Point();
Point p2 = new Point();
// start with the relative location...
c.getLocation(p1);
// get to the middle of the fractionsLabel
Dimension d = c.getSize();
p1.x += d.width / 2;
p1.y += d.height / 2;
Component parent = c.getParent();
// System.err.println("parent=" + parent);
while (parent != null) {
parent.getLocation(p2);
p1.x += p2.x;
p1.y += p2.y;
if (STOP.equals(parent.getName())) break;
parent = parent.getParent();
}
return p1;
}
/**
* Changes the frame's location to a more central screen location
*
* @param frame the frame to be moved
* @param X how far right to move the frame
* @param Y how far down to move the frame
*/
public static void changeFrameLocation(Component frame, int X, int Y) {
Point location = frame.getLocation(); // the window's current location
// move the window over and down a certain amount of pixels
location.translate(X, Y);
// set the location
frame.setLocation(location);
}
public void componentMoved(ComponentEvent evt) {
Component component = evt.getComponent();
Point point = component.getLocation();
if (point.y < 0) {
component.setBounds(point.x, 0, component.getWidth(), component.getHeight());
}
}
public static void center(Component c, Component rel) {
if (rel != null) {
c.setLocation(
rel.getLocation().x + rel.getSize().width / 2 - c.getSize().width / 2,
rel.getLocation().y + rel.getSize().height / 2 - c.getSize().height / 2);
} else {
c.setLocation(
Toolkit.getDefaultToolkit().getScreenSize().width / 2 - c.getSize().width / 2,
+Toolkit.getDefaultToolkit().getScreenSize().height / 2 - c.getSize().height / 2);
}
}
public void paint(Graphics g1) {
Graphics2D g = (Graphics2D) g1;
Component c;
Point p;
paintComponent(g);
for (int i = 0; i < getComponentCount(); i++) {
AffineTransform save = g.getTransform();
c = getComponent(i);
p = c.getLocation();
g.translate((int) p.getX(), (int) p.getY());
c.paint(g);
g.setTransform(save);
}
}