/*
* Copyright (c) 1998-2002 Carnegie Mellon University. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
* NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
import java.awt.*;
public abstract class Win {
public static void center (Window window, Component ref) {
position (window, ref, 0.5, 0.5);
}
public static void position (Window frame, Component ref,
double xfrac, double yfrac) {
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension size = frame.getSize();
Dimension refSize = (ref != null)
? ref.getSize()
: screenSize;
Point origin = (ref != null)
? ref.getLocationOnScreen ()
: new Point (0, 0);
int x = origin.x + relativePoint (xfrac, refSize.width, size.width);
int y = origin.y + relativePoint (yfrac, refSize.height, size.height);
// make sure frame is entirely on screen
x = Math.max (0, Math.min (screenSize.width - size.width, x));
y = Math.max (0, Math.min (screenSize.height - size.height, y));
frame.setLocation (x, y);
}
static int relativePoint (double frac, int parentLength, int childLength) {
if (frac < 0)
return (int) (frac * childLength);
else if (frac > 1)
return (int) (parentLength + (frac - 2) * childLength);
else
return (int) (frac * (parentLength - childLength));
}
public static Frame findFrame (Component comp) {
for (; comp!=null; comp = comp.getParent ())
if (comp instanceof Frame) {
return (Frame)comp;
}
return null;
}
public static Frame findFrameOrMakeFrame (Component parent) {
return (parent != null) ? findFrame (parent) : new Frame ();
}
}
|