private VirtualTreeModelViewer initVirtualViewer(
TreeModelViewer clientViewer, VirtualViewerListener listener) {
Object input = clientViewer.getInput();
ModelDelta stateDelta = new ModelDelta(input, IModelDelta.NO_CHANGE);
clientViewer.saveElementState(TreePath.EMPTY, stateDelta, IModelDelta.EXPAND);
listener.fRemainingUpdatesCount = calcUpdatesCount(stateDelta);
VirtualTreeModelViewer fVirtualViewer =
new VirtualTreeModelViewer(
clientViewer.getDisplay(), SWT.NONE, clientViewer.getPresentationContext());
fVirtualViewer.setFilters(clientViewer.getFilters());
fVirtualViewer.addViewerUpdateListener(listener);
fVirtualViewer.addLabelUpdateListener(listener);
String[] columns = clientViewer.getPresentationContext().getColumns();
fVirtualViewer.setInput(input);
if (fVirtualViewer.canToggleColumns()) {
fVirtualViewer.setShowColumns(clientViewer.isShowColumns());
fVirtualViewer.setVisibleColumns(columns);
}
fVirtualViewer.updateViewer(stateDelta);
return fVirtualViewer;
}
