public void addPanel(final WPanel panel) {
panel.setCollapsible(true);
panel.collapse();
panel
.expanded()
.addListener(
this,
new Signal.Listener() {
public void trigger() {
onExpand(true, panel);
}
});
panel
.collapsed()
.addListener(
this,
new Signal.Listener() {
public void trigger() {
onExpand(false, panel);
}
});
super.addWidget(panel);
}
private void onExpand(boolean notUndo, WPanel sender) {
WPanel panel = sender;
if (notUndo) {
wasExpanded_ = -1;
for (int i = 0; i < getChildren().size(); ++i) {
WPanel p = (WPanel) getChildren().get(i);
if (p != panel) {
if (!p.isCollapsed()) wasExpanded_ = i;
p.collapse();
}
}
} else {
if (wasExpanded_ != -1) {
WPanel p = (WPanel) getChildren().get(wasExpanded_);
p.expand();
}
}
}