public void runViewUpdate(final Runnable runnable, final boolean preserveExpansion) {
if (Utils.canUpdateViewer(getViewer()) || isPerformingBackgroundUpdate()) {
internalRunViewUpdate(runnable, preserveExpansion);
} else {
if (Thread.currentThread() != getEventHandlerJob().getThread()) {
// Run view update should only be called from the UI thread or
// the update handler thread.
// We will log the problem for now and make it an assert later
TeamUIPlugin.log(
IStatus.WARNING,
"View update invoked from invalid thread",
new TeamException(
"View update invoked from invalid thread")); //$NON-NLS-1$ //$NON-NLS-2$
}
final Control ctrl = getViewer().getControl();
if (ctrl != null && !ctrl.isDisposed()) {
ctrl.getDisplay()
.syncExec(
new Runnable() {
public void run() {
if (!ctrl.isDisposed()) {
BusyIndicator.showWhile(
ctrl.getDisplay(),
new Runnable() {
public void run() {
internalRunViewUpdate(runnable, preserveExpansion);
}
});
}
}
});
}
}
}
/**
* Forces the viewer to update the labels for queued elemens whose label has changed during this
* round of changes. This method should only be invoked in the UI thread.
*/
protected void firePendingLabelUpdates() {
if (!Utils.canUpdateViewer(getViewer())) return;
try {
Object[] updates = pendingLabelUpdates.toArray(new Object[pendingLabelUpdates.size()]);
updateLabels(updates);
} finally {
pendingLabelUpdates.clear();
}
}
/*
* Method that can be called from the UI thread to update the view model.
*/
private void internalRunViewUpdate(final Runnable runnable, boolean preserveExpansion) {
StructuredViewer viewer = getViewer();
IResource[] expanded = null;
IResource[] selected = null;
try {
if (Utils.canUpdateViewer(viewer)) {
viewer.getControl().setRedraw(false);
if (preserveExpansion) {
expanded = provider.getExpandedResources();
selected = provider.getSelectedResources();
}
if (viewer instanceof AbstractTreeViewer && additionsMap == null)
additionsMap = new HashMap();
}
runnable.run();
} finally {
if (Utils.canUpdateViewer(viewer)) {
try {
if (additionsMap != null && !additionsMap.isEmpty() && Utils.canUpdateViewer(viewer)) {
for (Iterator iter = additionsMap.keySet().iterator(); iter.hasNext(); ) {
ISynchronizeModelElement parent = (ISynchronizeModelElement) iter.next();
if (Policy.DEBUG_SYNC_MODELS) {
System.out.println("Adding child view items of " + parent.getName()); // $NON-NLS-1$
}
Set toAdd = (Set) additionsMap.get(parent);
((AbstractTreeViewer) viewer).add(parent, toAdd.toArray(new Object[toAdd.size()]));
}
additionsMap = null;
}
if (expanded != null) {
provider.expandResources(expanded);
}
if (selected != null) {
provider.selectResources(selected);
}
} finally {
viewer.getControl().setRedraw(true);
}
}
}
ISynchronizeModelElement root = provider.getModelRoot();
if (root instanceof SynchronizeModelElement) ((SynchronizeModelElement) root).fireChanges();
}
/*
* Forces the viewer to update the labels for the given elements
*/
private void updateLabels(Object[] elements) {
StructuredViewer tree = getViewer();
if (Utils.canUpdateViewer(tree)) {
tree.update(elements, null);
}
}