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// $Id: DockLayout.java,v 1.2 2006/02/24 23:29:43 bobtarling Exp $
/*
* DockLayout.java
*
* Created on 23 February 2003, 17:14
*/
package org.tigris.swidgets;
import java.awt.*;
import java.util.ArrayList;
import javax.swing.SwingConstants;
/**
* Layout Manager to control positions of docked toolbars
* @author Christopher Bach
*/
public class DockLayout extends BorderLayout {
private static final long serialVersionUID = 5488248873659570282L;
private ArrayList north = new ArrayList(1);
private ArrayList south = new ArrayList(1);
private ArrayList east = new ArrayList(1);
private ArrayList west = new ArrayList(1);
private Component center = null;
private static final int VERTICAL = SwingConstants.VERTICAL;
private static final int HORIZONTAL = SwingConstants.HORIZONTAL;
/**
* The constructor.
*/
public DockLayout() {
}
/**
* @see java.awt.LayoutManager2#addLayoutComponent(java.awt.Component,
* java.lang.Object)
*/
public void addLayoutComponent(Component c, Object con) {
synchronized (c.getTreeLock()) {
if (con != null) {
String s = con.toString();
if (s.equals(NORTH)) north.add(c);
else if (s.equals(SOUTH)) south.add(c);
else if (s.equals(EAST)) east.add(c);
else if (s.equals(WEST)) west.add(c);
else if (s.equals(CENTER)) center = c;
}
}
}
/**
* @see java.awt.LayoutManager#removeLayoutComponent(java.awt.Component)
*/
public void removeLayoutComponent(Component c) {
north.remove(c);
south.remove(c);
east.remove(c);
west.remove(c);
if (c == center) {
center = null;
}
}
/**
* @see java.awt.LayoutManager#layoutContainer(java.awt.Container)
*/
public void layoutContainer(Container target) {
synchronized (target.getTreeLock()) {
Insets insets = target.getInsets();
int top = insets.top;
int bottom = target.getHeight() - insets.bottom;
int left = insets.left;
int right = target.getWidth() - insets.right;
int northHeight = getPreferredDimension(north).height;
int southHeight = getPreferredDimension(south).height;
int eastWidth = getPreferredDimension(east).width;
int westWidth = getPreferredDimension(west).width;
placeComponents(north, left, top, right - left,
northHeight, HORIZONTAL);
top += (northHeight + getVgap());
placeComponents(south, left, bottom - southHeight, right - left,
southHeight, HORIZONTAL);
bottom -= (southHeight + getVgap());
placeComponents(east, right - eastWidth, top, eastWidth,
bottom - top, VERTICAL);
right -= (eastWidth + getHgap());
placeComponents(west, left, top, westWidth, bottom - top, VERTICAL);
left += (westWidth + getHgap());
if (center != null) {
center.setBounds(left, top, right - left, bottom - top);
}
}
}
// Returns the ideal width for a vertically oriented toolbar
// and the ideal height for a horizontally oriented tollbar:
private Dimension getPreferredDimension(ArrayList comps) {
int w = 0, h = 0;
for (int i = 0; i < comps.size(); i++) {
Component c = (Component) (comps.get(i));
Dimension d = c.getPreferredSize();
w = Math.max(w, d.width);
h = Math.max(h, d.height);
}
return new Dimension(w, h);
}
private void placeComponents(ArrayList comps,
int x, int y, int w, int h, int orientation)
{
int offset = 0;
Component c = null;
if (orientation == HORIZONTAL) {
offset = x;
for (int i = 0; i < comps.size(); i++) {
c = (Component) (comps.get(i));
int cwidth = c.getPreferredSize().width;
if (i == comps.size() - 1) cwidth = w - offset;
c.setBounds(x + offset, y, cwidth, h);
offset += cwidth;
}
} else {
for (int i = 0; i < comps.size(); i++) {
c = (Component) (comps.get(i));
int cheight = c.getPreferredSize().height;
if (i == comps.size() - 1) cheight = h - offset;
c.setBounds(x, y + offset, w, cheight);
offset += cheight;
}
}
}
}
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