private void handleRowClick(MouseDownEvent event, TableRowElement row) {
int modifiers = KeyboardShortcut.getModifierValue(event.getNativeEvent());
modifiers &= ~KeyboardShortcut.ALT; // ALT has no effect
if (!allowMultiSelect_) modifiers = KeyboardShortcut.NONE;
// We'll treat Ctrl and Meta as equivalent--and normalize to Ctrl.
if (KeyboardShortcut.META == (modifiers & KeyboardShortcut.META))
modifiers |= KeyboardShortcut.CTRL;
modifiers &= ~KeyboardShortcut.META;
if (modifiers == KeyboardShortcut.NONE) {
// Select only the target row
clearSelection();
setSelected(row, true);
} else if (modifiers == KeyboardShortcut.CTRL) {
// Toggle the target row
setSelected(row, !isSelected(row));
} else {
// SHIFT or CTRL+SHIFT
int target = row.getRowIndex();
Integer min = null;
Integer max = null;
for (TableRowElement selectedRow : selectedRows_) {
if (min == null) min = selectedRow.getRowIndex();
max = selectedRow.getRowIndex();
}
int offset; // selection offset
int length; // selection length
if (min == null) {
// Nothing is selected
offset = target;
length = 1;
} else if (target < min) {
// Select target..max
offset = target;
length = max - target + 1;
} else if (target > max) {
offset = min;
length = target - min + 1;
} else {
// target is in between min and max
if (modifiers == (KeyboardShortcut.CTRL | KeyboardShortcut.SHIFT)) {
offset = min;
length = target - min + 1;
} else {
offset = target;
length = 1;
}
}
clearSelection();
if (length > 0) {
setSelectedPhysical(offset, length, true);
}
}
}
