public void setTabs(TwoLevelTab... tabs) {
super.setTabs(tabs);
for (TwoLevelTab tab : tabs) {
tab.getLayout().addTwoLevelTabSelectedHandler(this);
updateTab(tab, tab.getPane());
}
buildTabList();
addTabSelectedHandler(this);
}
public TwoLevelTab getDefaultTab() {
TwoLevelTab[] tabs = getTabs();
for (TwoLevelTab tab : tabs) {
if (!tab.getDisabled()) {
return tab;
}
}
return null;
}
/**
* This method initializes the head and tail pointers. Then it initializes the {@link
* TwoLevelTab#getActualNext actualNext} and {@link TwoLevelTab#getVisibleNext visibleNext}
* properties of each tab. This list is built so that when hiding and showing tabs, the tab order
* remains consistent. The order of the list is the same as the order of the tabs passed to {@link
* #setTabs(TwoLevelTab...)}
*/
private void buildTabList() {
TwoLevelTab[] tabs = getTabs();
head = tabs[0];
tail = tabs[tabs.length - 1];
TwoLevelTab current = head;
for (int i = 1; i < tabs.length; ++i) {
current.setActualNext(tabs[i]);
current.setVisibleNext(tabs[i]);
current = tabs[i];
}
}
@Override
public void destroy() {
// add the hidden tabs back under the TabSet. This will get them destroyed by smartgwt when the
// tabset
// goes away. There is no explicit Tab.destroy().
for (TwoLevelTab tab : hiddenTabs.values()) {
addTab(tab);
}
for (TwoLevelTab tab : getTabs()) {
tab.getLayout().destroyViews();
}
super.destroy();
}
/**
* Walks the list to find the closest, visible successor.
*
* @param tab A {@link TwoLevelTab tab} that is currently hidden
* @return The closest, visisble successor or null if the insertion point is the tail.
*/
private TwoLevelTab findClosestVisibleSuccessor(TwoLevelTab tab) {
TwoLevelTab current = tab;
while (current != null) {
// Walk the list of tabs until we reach a visible successor or the tail
if (current.getVisibleNext() == null && current != tail) {
current = current.getActualNext();
} else {
return current;
}
}
// if we reach this point then that means we will be inserting at the tail
return null;
}
/**
* Walks the list of tabs to find the closest, visible predecessor.
*
* @param tab A {@link TwoLevelTab tab} that is currently visible
* @return The closest, visible predecessor or null if have the head
*/
private TwoLevelTab findClosestVisiblePredecessor(TwoLevelTab tab) {
if (tab == head) {
return null;
}
TwoLevelTab current = head;
while (current != tab) {
// if we have reached the visible tail or the immediate predecessor
// of the tab, then return it.
if (current.getVisibleNext() == null || current.getVisibleNext() == tab) {
return current;
}
current = current.getVisibleNext();
}
// Not sure what we should do if we get here. return null for now
return null;
}
// This is invoked by smartgwt when the user clicks on a Tab in the TabSet, or TabSet.selectTab()
// is called. It
// sets the current SubTab and fires an event to notify AbstractTwoLevelTabSet that a tab/subtab
// has been selected.
public void onTabSelected(TabSelectedEvent tabSelectedEvent) {
// if requested, ignore select tab notifications. smartgwt can generate unwanted notifications
// while we manipulate the tabset (e.g. when hiding the current tab). We want to manage this at
// a higher level
if (isIgnoreSelectEvents()) {
return;
}
TwoLevelTab tab = (TwoLevelTab) getSelectedTab();
SubTab currentSubTab = tab.getLayout().getCurrentSubTab();
if (null != currentSubTab) {
TwoLevelTabSelectedEvent event =
new TwoLevelTabSelectedEvent(
tab.getName(),
tab.getLayout().getCurrentSubTab().getName(),
tabSelectedEvent.getTabNum(),
tab.getLayout().getCurrentCanvas(),
History.getToken());
m.fireEvent(event);
}
}
public void destroyViews() {
for (TwoLevelTab tab : getTabs()) {
tab.getLayout().destroyViews();
}
}
// Smartgwt does not currently offer the ability to hide a Tab (why!) so we fake it here. This
// allows us to keep
// the Tab structure in place while removing it from the TabSet
public void setTabHidden(TwoLevelTab tab, boolean hidden) {
if (hidden) {
if (hiddenTabs.containsKey(tab.getLocatorId())) {
return;
}
TwoLevelTab visiblePrevious = findClosestVisiblePredecessor(tab);
if (visiblePrevious == null) {
// if visiblePrevious is null then that means we are updating
// then head. Note that as of now (02/21/2012), the visible head,
// the summary tab, is fixed, so we don't really need to worry
// about updating the head; however, doing so will make it easier
// to support things like hiding arbitrary tabs or reordering tabs.
head = tab.getVisibleNext();
} else {
visiblePrevious.setVisibleNext(tab.getVisibleNext());
// check to see if the tail needs to be updated. If the
// following check is true, then that means visiblePrevious is
// now the tail.
if (visiblePrevious.getVisibleNext() == null) {
tail = visiblePrevious;
}
}
tab.setVisibleNext(null);
// Note that removing the tab does *not* destroy its content pane
// since we set the destroyPanes property to false in the
removeTab(tab);
hiddenTabs.put(tab.getLocatorId(), tab);
} else {
if (!hiddenTabs.containsKey(tab.getLocatorId())) {
return;
}
hiddenTabs.remove(tab.getLocatorId());
TwoLevelTab successor = findClosestVisibleSuccessor(tab);
if (successor == null) {
// if successor is null then that means we are updating the tail
tail.setVisibleNext(tab);
tail = tab;
addTab(tab);
} else {
TwoLevelTab visiblePrevious = findClosestVisiblePredecessor(successor);
tab.setVisibleNext(visiblePrevious.getVisibleNext());
visiblePrevious.setVisibleNext(tab);
addTab(tab, (getTabNumber(visiblePrevious.getID()) + 1));
}
}
}
