/**
* Applies the checked and grayed states of the given widget and its descendents.
*
* @param checked a set of elements (element type: <code>Object</code>)
* @param grayed a set of elements (element type: <code>Object</code>)
* @param widget the widget
*/
private void applyState(CustomHashtable checked, CustomHashtable grayed, Widget widget) {
Item[] items = getChildren(widget);
for (int i = 0; i < items.length; i++) {
Item item = items[i];
if (item instanceof TreeItem) {
Object data = item.getData();
if (data != null) {
TreeItem ti = (TreeItem) item;
ti.setChecked(checked.containsKey(data));
ti.setGrayed(grayed.containsKey(data));
}
}
applyState(checked, grayed, item);
}
}
/**
* Sets the grayed state of all items to correspond to the given set of grayed elements.
*
* @param grayedElements the set (element type: <code>Object</code>) of elements which are grayed
* @param widget the widget
*/
private void internalSetGrayed(CustomHashtable grayedElements, Widget widget) {
Item[] items = getChildren(widget);
for (int i = 0; i < items.length; i++) {
TreeItem item = (TreeItem) items[i];
Object data = item.getData();
if (data != null) {
boolean grayed = grayedElements.containsKey(data);
if (grayed != item.getGrayed()) {
item.setGrayed(grayed);
}
}
internalSetGrayed(grayedElements, item);
}
}
@Override
public void remove(Object[] elements) {
assertElementsNotNull(elements);
if (checkBusy()) return;
if (elements.length == 0) {
return;
}
// deselect any items that are being removed, see bug 97786
boolean deselectedItems = false;
Object elementToBeRemoved = null;
CustomHashtable elementsToBeRemoved = null;
if (elements.length == 1) {
elementToBeRemoved = elements[0];
} else {
elementsToBeRemoved = new CustomHashtable(getComparer());
for (Object element : elements) {
elementsToBeRemoved.put(element, element);
}
}
int[] selectionIndices = doGetSelectionIndices();
for (int index : selectionIndices) {
Item item = doGetItem(index);
Object data = item.getData();
if (data != null) {
if ((elementsToBeRemoved != null && elementsToBeRemoved.containsKey(data))
|| equals(elementToBeRemoved, data)) {
table.deselect(index);
deselectedItems = true;
}
}
}
super.remove(elements);
if (deselectedItems) {
ISelection sel = getSelection();
updateSelection(sel);
firePostSelectionChanged(new SelectionChangedEvent(this, sel));
}
}
