// Get row's index by a specified row object
private int getRowIndexByObject(T object) {
for (int row = 0; row < dataDisplay.getRowCount(); row++) {
if (dataDisplay.getVisibleItems().get(row).equals(object)) {
return row;
}
}
return -1;
}
// Select a range of multiple rows
private void selectRange(T object) {
// Select multiple selection origin row
if (originSelectedRow == -1) {
originSelectedRow = lastSelectedRow;
}
// Get start/end rows
int selectedRow = getRowIndexByObject(object);
int startRow = originSelectedRow < selectedRow ? originSelectedRow : selectedRow;
int endRow = originSelectedRow > selectedRow ? originSelectedRow : selectedRow;
// Clear current selection and select row in range
clearSelection();
for (int row = startRow; row <= endRow; row++) {
selectionChanges.put(dataDisplay.getVisibleItems().get(row), true);
}
}
// Select a row with regarding a specified shift
private void selectRow(int shift) {
if (selectedSet.isEmpty() || dataDisplay == null) {
return;
}
int shiftSelectedRow = lastSelectedRow + shift;
int nextRow =
shiftSelectedRow >= 0
? shiftSelectedRow % dataDisplay.getRowCount()
: shiftSelectedRow + dataDisplay.getRowCount();
if (disabledRows.contains(nextRow)) {
selectRow(shift > 0 ? shift + 1 : shift - 1);
return;
}
setSelected(dataDisplay.getVisibleItems().get(nextRow), true);
}
void resolveChanges() {
Set<Object> selectedKeys = selectedSet.keySet();
List<Object> visibleKeys = new ArrayList<>();
for (T visible : dataDisplay.getVisibleItems()) {
visibleKeys.add(getKey(visible));
}
if (!visibleKeys.containsAll(selectedKeys)) {
for (Map.Entry<Object, T> selectedEntry : selectedSet.entrySet()) {
if (!visibleKeys.contains(selectedEntry.getKey())) {
selectionChanges.put(selectedEntry.getValue(), false);
}
}
}
if (selectionChanges.isEmpty()) {
return;
}
boolean changed = false;
for (Map.Entry<T, Boolean> entry : selectionChanges.entrySet()) {
T object = entry.getKey();
boolean selected = entry.getValue();
Object key = getKey(object);
T oldValue = selectedSet.get(key);
if (selected) {
if (oldValue == null || !oldValue.equals(object)) {
selectedSet.put(getKey(object), object);
changed = true;
}
} else {
if (oldValue != null) {
selectedSet.remove(key);
changed = true;
}
}
}
selectionChanges.clear();
if (changed) {
SelectionChangeEvent.fire(this);
}
}
private T lastItem() {
return dataDisplay.getVisibleItems().get(dataDisplay.getVisibleItems().size() - 1);
}
private T firstItem() {
return dataDisplay.getVisibleItems().get(0);
}