/**
* Update combo box of this view.
*
* @param model_changed set true if the model was changed.
*/
private void update(final boolean model_changed) {
if (model == null) { // Clear/disable GUI
items.setItems(new String[] {Messages.SampleView_NoPlot});
items.select(0);
items.setEnabled(false);
sample_table.setInput(null);
return;
}
// Show PV names.
// Also build array for following index-based check of selected item
final List<ModelItem> model_items = new ArrayList<>();
final List<String> names_list = new ArrayList<>();
names_list.add(Messages.SampleView_SelectItem);
for (ModelItem item : model.getItems()) {
model_items.add(item);
names_list.add(item.getName());
}
final String[] names = names_list.toArray(new String[names_list.size()]);
if (!model_changed && items.getSelectionIndex() > 0) {
// Is the previously selected item still valid?
if (sample_table.getInput() instanceof ModelItem) {
final ModelItem selected_item = (ModelItem) sample_table.getInput();
if (model_items.indexOf(selected_item) != -1) { // Show same PV name again in combo box
items.setItems(names);
items.select(model_items.indexOf(selected_item) + 1);
items.setEnabled(true);
// Update sample table size. Not locking for size()
sample_table.setItemCount(selected_item.getSamples().size());
sample_table.refresh();
return;
}
}
}
// Previously selected item no longer valid.
// Show new items, clear rest
items.setItems(names);
items.select(0);
items.setEnabled(true);
sample_table.setInput(null);
}
/**
* Initialize
*
* @param item Item from which to get samples /** @param start Start time /** @param end End time
*/
public ModelSampleIterator(final ModelItem item, final Instant start, final Instant end) {
this.samples = item.getSamples();
this.end = end;
samples.getLock().lock();
try {
// Anything?
if (samples.size() <= 0) index = -1;
// All data after start time?
else if (samples.get(0).getPosition().compareTo(start) >= 0) index = 0;
else { // There is data before the start time. Find sample just before start time.
index = findSampleLessOrEqual(start);
}
// Is first sample already after end time?
if (index >= 0) {
final PlotSample sample = samples.get(index);
value = sample.getVType();
if (sample.getPosition().compareTo(end) > 0) index = -1;
}
} finally {
samples.getLock().unlock();
}
}