/**
* Calculates the preferred size dimensions for the specified panel given the components in the
* specified parent container.
*
* @param target The component to be laid out.
* @return A size deemed suitable for laying out the container.
* @see #minimumLayoutSize
*/
public Dimension preferredLayoutSize(Container target) {
int count;
Component component;
Dimension dimension;
Insets insets;
Dimension ret;
synchronized (target.getTreeLock()) {
// get the the total height and maximum width component
ret = new Dimension(0, 0);
count = target.getComponentCount();
for (int i = 0; i < count; i++) {
component = target.getComponent(i);
if (component.isVisible()) {
dimension = component.getPreferredSize();
ret.width = Math.max(ret.width, dimension.width);
ret.height += dimension.height;
}
}
insets = target.getInsets();
ret.width += insets.left + insets.right;
ret.height += insets.top + insets.bottom;
}
return (ret);
}
/**
* @param aContainer
* @param aComponentClass
* @return
*/
private static Component findComponent(
final Container aContainer, final Class<? extends Component> aComponentClass) {
Component result = null;
final int cnt = aContainer.getComponentCount();
for (int i = 0; (result == null) && (i < cnt); i++) {
final Component comp = aContainer.getComponent(i);
if (aComponentClass.equals(comp.getClass())) {
result = comp;
} else if (comp instanceof Container) {
result = findComponent((Container) comp, aComponentClass);
}
}
return result;
}
/**
* Lays out the container.
*
* @param target The container which needs to be laid out.
*/
public void layoutContainer(Container target) {
int count;
Component component;
Dimension dimension;
synchronized (target.getTreeLock()) {
count = target.getComponentCount();
for (int i = 0; i < count; i++) {
component = target.getComponent(i);
if (component.isVisible()) {
dimension = component.getPreferredSize();
component.setSize(dimension.width, dimension.height);
}
}
}
}
/**
* Calculates the preferred size dimensions for the specified panel given the components in the
* specified parent container.
*
* @see #minimumLayoutSize
* @param target The component to be laid out.
* @return A size deemed suitable for laying out the container.
*/
public Dimension preferredLayoutSize(Container target) {
int count;
Container parent;
Component component;
Point point;
Dimension dimension;
Insets insets;
Dimension ret;
synchronized (target.getTreeLock()) {
count = target.getComponentCount();
if (0 == count) {
// be the same size unless we have a parent
ret = target.getSize();
parent = target.getParent();
if (null != parent) {
insets = parent.getInsets();
ret = parent.getSize();
ret.setSize(
ret.width - insets.left - insets.right, ret.height - insets.top - insets.bottom);
}
} else {
ret = new Dimension(0, 0);
for (int i = 0; i < count; i++) {
component = target.getComponent(i);
if (component.isVisible()) {
point = component.getLocation();
dimension = component.getPreferredSize();
ret.width = Math.max(ret.width, point.x + dimension.width);
ret.height = Math.max(ret.height, point.y + dimension.height);
}
}
insets = target.getInsets();
ret.width += insets.left + insets.right;
ret.height += insets.top + insets.bottom;
}
}
return (ret);
}
/**
* Lays out the container.
*
* @param target The container which needs to be laid out.
*/
public void layoutContainer(Container target) {
Insets insets;
int x;
int y;
int count;
int width;
Component component;
Dimension dimension;
synchronized (target.getTreeLock()) {
insets = target.getInsets();
x = insets.left;
y = insets.top;
count = target.getComponentCount();
width = 0;
for (int i = 0; i < count; i++) {
component = target.getComponent(i);
if (component.isVisible()) {
dimension = component.getPreferredSize();
width = Math.max(width, dimension.width);
component.setSize(dimension.width, dimension.height);
component.setLocation(x, y);
y += dimension.height;
}
}
// now set them all to the same width
for (int i = 0; i < count; i++) {
component = target.getComponent(i);
if (component.isVisible()) {
dimension = component.getSize();
dimension.width = width;
component.setSize(dimension.width, dimension.height);
}
}
}
}
