/**
* Sets the currently selected row by key of its {@link UserItem}.
*
* @param key key of {@link UserItem}
* @param forceExpand whether the selected row shall be expanded
*/
public void setSelectedKey(Key key, boolean forceExpand) {
if (key == null) {
RowWidget old = rows.get(selected);
old.collapse();
old.removeStyleDependentName("selected");
selected = null;
SelectionChangeEvent.fire(this);
} else if (key.equals(selected)) {
// was selected and is selected
} else {
boolean expand = true;
// selected changed
if (selected != null) {
RowWidget old = rows.get(selected);
old.removeStyleDependentName("selected");
if (old.isExpanded()) {
old.collapse();
} else {
expand = false;
}
}
RowWidget newly = rows.get(key);
if (expand || forceExpand) {
newly.expand();
}
selected = key;
newly.addStyleDependentName("selected");
SelectionChangeEvent.fire(this);
}
}
/**
* Does the actual value setting.
*
* @param value new value to show
*/
private void doSetValue(UserItem value) {
RowWidget row = rows.get(value.getKey());
if (row != null) {
Item itemObject = row.getValue().getItemObject();
value.setItemObject(itemObject);
row.setValue(value);
}
}
/**
* @param index index of row to be selected
* @param forceExpand whether the selected row shall be expanded
* @return whether the index exists
*/
protected boolean setSelectedIndex(int index, boolean forceExpand) {
try {
RowWidget w = (RowWidget) flowPanel.getWidget(index);
setSelectedKey(w.getKey(), forceExpand);
return true;
} catch (Exception e) {
return false;
}
}
/** Does the actual addition of {@link UserItem}s to the top of the list. */
public void addTail() {
List<UserItem> l = tail;
if (l.size() > 0) {
tail = new ArrayList<UserItem>();
tailKeys = new HashSet<Key>();
for (UserItem e : l) {
RowWidget row = createRow(e);
flowPanel.add(row);
rows.put(row.getKey(), row);
}
rowsAdded();
NewDataEvent.fire(this, NewDataType.NEW_DATA_SHOWN);
}
}
/** Does the actual addition of {@link UserItem}s to the top of the list. */
private void addHead() {
List<UserItem> l = head;
if (l.size() > 0) {
head = new ArrayList<UserItem>();
headKeys = new HashSet<Key>();
int offsetHeight = flowPanel.getOffsetHeight();
for (int i = l.size() - 1; i >= 0; i--) {
UserItem e = l.get(i);
RowWidget row = createRow(e);
flowPanel.insert(row, 0);
rows.put(row.getKey(), row);
}
int deltaHeight = flowPanel.getOffsetHeight() - offsetHeight;
scrollPanel.setVerticalScrollPosition(scrollPanel.getVerticalScrollPosition() + deltaHeight);
rowsAdded();
NewDataEvent.fire(this, NewDataType.NEW_DATA_SHOWN);
}
}
/**
* Creates a new row for a {@link UserItem}.
*
* @param userItem {@link UserItem} which is the row created for
* @return widget representing the {@link UserItem}
*/
private RowWidget createRow(UserItem userItem) {
RowWidget row = UserItemRow.FACTORY.createWidget(userItem);
row.addOpenHandler(new OpenCloseHander());
row.addCloseHandler(new OpenCloseHander());
return row;
}