/**
* Returns the previous component that should receive focus in this container given the current
* focus owner. If the supplied current focus owner is null, the container should return its last
* focusable component. If the container has no focusable components before the current focus, it
* should call {@link #getPreviousFocus()} to search further up the hierarchy.
*/
protected BComponent getPreviousFocus(BComponent current) {
boolean foundCurrent = (current == null);
for (int ii = getComponentCount() - 1; ii >= 0; ii--) {
BComponent child = getComponent(ii);
if (!foundCurrent) {
if (child == current) {
foundCurrent = true;
}
continue;
}
if (child.acceptsFocus()) {
return child;
}
}
return getPreviousFocus();
}
/**
* Returns the next component that should receive focus in this container given the current focus
* owner. If the supplied current focus owner is null, the container should return its first
* focusable component. If the container has no focusable components following the current focus,
* it should call {@link #getNextFocus()} to search further up the hierarchy.
*/
protected BComponent getNextFocus(BComponent current) {
boolean foundCurrent = (current == null);
for (int ii = 0, ll = getComponentCount(); ii < ll; ii++) {
BComponent child = getComponent(ii);
if (!foundCurrent) {
if (child == current) {
foundCurrent = true;
}
continue;
}
if (child.acceptsFocus()) {
return child;
}
}
return getNextFocus();
}
/** Removes the child at a specific position from this container. */
public void remove(int index) {
BComponent child = getComponent(index);
_children.remove(index);
if (_layout != null) {
_layout.removeLayoutComponent(child);
}
child.setParent(null);
// if we're part of the hierarchy we call wasRemoved() on the
// child now (which will be propagated to all of its children)
if (isAdded()) {
child.wasRemoved();
}
// we need to be relayed out
invalidate();
}
/**
* Adds a child to this container at the specified position, with the specified layout
* constraints.
*/
public void add(int index, BComponent child, Object constraints) {
if (_layout != null) {
_layout.addLayoutComponent(child, constraints);
}
_children.add(index, child);
child.setParent(this);
// if we're already part of the hierarchy, call wasAdded() on our
// child; otherwise when our parent is added, everyone will have
// wasAdded() called on them
if (isAdded()) {
child.wasAdded();
}
// we need to be relayed out
invalidate();
}
// documentation inherited
protected void renderComponent(Renderer renderer) {
super.renderComponent(renderer);
// render our children
for (int ii = 0, ll = getComponentCount(); ii < ll; ii++) {
getComponent(ii).render(renderer);
}
}
// documentation inherited
public void setVisible(boolean visible) {
super.setVisible(visible);
// show or hide our children accordingly
for (int ii = getComponentCount() - 1; ii >= 0; ii--) {
getComponent(ii).setVisible(visible);
}
}
// documentation inherited
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
// enable or disable our children accordingly
for (int ii = getComponentCount() - 1; ii >= 0; ii--) {
getComponent(ii).setEnabled(enabled);
}
}
// documentation inherited
public void setAlpha(float alpha) {
super.setAlpha(alpha);
// set our children's alpha values accordingly
for (int ii = getComponentCount() - 1; ii >= 0; ii--) {
getComponent(ii).setAlpha(alpha);
}
}
// documentation inherited
public BComponent getHitComponent(int mx, int my) {
// if we're not within our bounds, we don't need to check our children
if (super.getHitComponent(mx, my) != this) {
return null;
}
// translate the coordinate into our children's coordinates
mx -= _x;
my -= _y;
BComponent hit = null;
for (int ii = getComponentCount() - 1; ii >= 0; ii--) {
BComponent child = getComponent(ii);
if ((hit = child.getHitComponent(mx, my)) != null) {
return hit;
}
}
return this;
}
/** Removes the specified child from this container. */
public void remove(BComponent child) {
if (!_children.remove(child)) {
// if the component was not our child, stop now
return;
}
if (_layout != null) {
_layout.removeLayoutComponent(child);
}
child.setParent(null);
// if we're part of the hierarchy we call wasRemoved() on the
// child now (which will be propagated to all of its children)
if (isAdded()) {
child.wasRemoved();
}
// we need to be relayed out
invalidate();
}
// documentation inherited
protected void wasRemoved() {
super.wasRemoved();
// call wasRemoved() on all of our children
applyOperation(
new ChildOp() {
public void apply(BComponent child) {
child.wasRemoved();
}
});
}
// documentation inherited
protected void wasAdded() {
super.wasAdded();
// call wasAdded() on all of our existing children; if they are
// added later (after we are added), they will automatically have
// wasAdded() called on them at that time
applyOperation(
new ChildOp() {
public void apply(BComponent child) {
child.wasAdded();
}
});
}
@Override // documentation inherited
public BComponent getHitComponent(int mx, int my) {
// if we're not within our bounds, we needn't check our target
Insets insets = getInsets();
if ((mx < _x + insets.left)
|| (my < _y + insets.bottom)
|| (mx >= _x + _width - insets.right)
|| (my >= _y + _height - insets.top)) {
return null;
}
// translate the coordinate into our children's coordinates
mx -= _x;
my -= (_y + _offset);
BComponent hit = null;
for (int ii = 0, ll = getComponentCount(); ii < ll; ii++) {
BComponent child = getComponent(ii);
if ((hit = child.getHitComponent(mx, my)) != null) {
return hit;
}
}
return this;
}
