/**
* Add item to the model.
*
* <p>If the item has no color, this will define its color based on the model's next available
* color.
*
* <p>If the model is already 'running', the item will be 'start'ed.
*
* @param item {@link ModelItem} to add
* @throws RuntimeException if item is already in model
* @throws Exception on error trying to start a PV Item that's added to a running model
*/
public void addItem(final ModelItem item) throws Exception {
// A new item with the same PV name are allowed to be added in the
// model. This way Data Browser can show the trend of the same PV
// in different axes or with different waveform indexes. For example,
// one may want to show the first element of epics://aaa:bbb in axis 1
// while showing the third element of the same PV in axis 2 to compare
// their trends in one chart.
//
// if (getItem(item.getName()) != null)
// throw new RuntimeException("Item " + item.getName() + " already in Model");
// But, if exactly the same instance of the given ModelItem already exists in this
// model, it will not be added.
if (items.indexOf(item) != -1)
throw new RuntimeException("Item " + item.getName() + " already in Model");
// Assign default color
if (item.getColor() == null) item.setColor(getNextItemColor());
// Force item to be on an axis
if (item.getAxis() == null) {
if (axes.size() == 0) addAxis(item.getDisplayName());
item.setAxis(axes.get(0));
}
// Check item axis
if (!axes.contains(item.getAxis()))
throw new Exception("Item " + item.getName() + " added with invalid axis " + item.getAxis());
// Add to model
items.add(item);
item.setModel(this);
if (is_running && item instanceof PVItem) ((PVItem) item).start(scanner);
// Notify listeners of new item
for (ModelListener listener : listeners) listener.itemAdded(item);
}
/**
* Add value axis with default settings
*
* @return Newly added axis configuration
*/
public AxisConfig addAxis(String name) {
if (name == null) name = NLS.bind(Messages.Plot_ValueAxisNameFMT, getAxisCount() + 1);
final AxisConfig axis = new AxisConfig(name);
axis.setColor(getNextItemColor());
addAxis(axis);
return axis;
}
/**
* Load model
*
* @param doc DOM document
* @throws Exception on error
* @throws RuntimeException if model was already in use
*/
private void loadFromDocument(final Document doc) throws Exception {
if (is_running || items.size() > 0) throw new RuntimeException("Model was already in use");
// Check if it's a <databrowser/>.
doc.getDocumentElement().normalize();
final Element root_node = doc.getDocumentElement();
if (!root_node.getNodeName().equals(TAG_DATABROWSER))
throw new Exception("Wrong document type");
synchronized (this) {
scroll_enabled = DOMHelper.getSubelementBoolean(root_node, TAG_SCROLL, scroll_enabled);
}
update_period = DOMHelper.getSubelementDouble(root_node, TAG_UPDATE_PERIOD, update_period);
final String start = DOMHelper.getSubelementString(root_node, TAG_START);
final String end = DOMHelper.getSubelementString(root_node, TAG_END);
if (start.length() > 0 && end.length() > 0) {
final StartEndTimeParser times = new StartEndTimeParser(start, end);
setTimerange(
TimestampHelper.fromCalendar(times.getStart()),
TimestampHelper.fromCalendar(times.getEnd()));
}
RGB color = loadColorFromDocument(root_node, TAG_BACKGROUND);
if (color != null) background = color;
try {
archive_rescale =
ArchiveRescale.valueOf(DOMHelper.getSubelementString(root_node, TAG_ARCHIVE_RESCALE));
} catch (Throwable ex) {
archive_rescale = ArchiveRescale.STAGGER;
}
// Load Time Axis
final Element timeAxisNode =
DOMHelper.findFirstElementNode(root_node.getFirstChild(), TAG_TIME_AXIS);
if (timeAxisNode != null) {
// Load PV items
Element axisNode = DOMHelper.findFirstElementNode(timeAxisNode.getFirstChild(), TAG_AXIS);
timeAxis = AxisConfig.fromDocument(axisNode);
}
// Load value Axes
Element list = DOMHelper.findFirstElementNode(root_node.getFirstChild(), TAG_AXES);
if (list != null) {
// Load PV items
Element item = DOMHelper.findFirstElementNode(list.getFirstChild(), TAG_AXIS);
while (item != null) {
addAxis(AxisConfig.fromDocument(item));
item = DOMHelper.findNextElementNode(item, TAG_AXIS);
}
}
// Load Annotations
list = DOMHelper.findFirstElementNode(root_node.getFirstChild(), TAG_ANNOTATIONS);
if (list != null) {
// Load PV items
Element item = DOMHelper.findFirstElementNode(list.getFirstChild(), TAG_ANNOTATION);
final List<AnnotationInfo> infos = new ArrayList<AnnotationInfo>();
try {
while (item != null) {
final AnnotationInfo annotation = AnnotationInfo.fromDocument(item);
infos.add(annotation);
item = DOMHelper.findNextElementNode(item, TAG_ANNOTATION);
}
} catch (Throwable ex) {
Activator.getLogger().log(Level.INFO, "XML error in Annotation", ex);
}
// Add to document
annotations = infos.toArray(new AnnotationInfo[infos.size()]);
}
// ADD by Laurent PHILIPPE
// Load Title and graph settings
try {
graphSettings = XYGraphSettingsXMLUtil.fromDocument(root_node.getFirstChild());
} catch (Throwable ex) {
Activator.getLogger().log(Level.INFO, "XML error in Title or graph settings", ex);
}
// Backwards compatibility with previous data browser which
// used global buffer size for all PVs
final int buffer_size =
DOMHelper.getSubelementInt(root_node, Model.TAG_LIVE_SAMPLE_BUFFER_SIZE, -1);
// Load PVs/Formulas
list = DOMHelper.findFirstElementNode(root_node.getFirstChild(), TAG_PVLIST);
if (list != null) {
// Load PV items
Element item = DOMHelper.findFirstElementNode(list.getFirstChild(), TAG_PV);
while (item != null) {
final PVItem model_item = PVItem.fromDocument(this, item);
if (buffer_size > 0) model_item.setLiveCapacity(buffer_size);
// Adding item creates the axis for it if not already there
addItem(model_item);
// Backwards compatibility with previous data browser which
// stored axis configuration with each item: Update axis from that.
final AxisConfig axis = model_item.getAxis();
String s = DOMHelper.getSubelementString(item, TAG_AUTO_SCALE);
if (s.equalsIgnoreCase("true")) axis.setAutoScale(true);
s = DOMHelper.getSubelementString(item, TAG_LOG_SCALE);
if (s.equalsIgnoreCase("true")) axis.setLogScale(true);
final double min = DOMHelper.getSubelementDouble(item, Model.TAG_MIN, axis.getMin());
final double max = DOMHelper.getSubelementDouble(item, Model.TAG_MAX, axis.getMax());
axis.setRange(min, max);
item = DOMHelper.findNextElementNode(item, TAG_PV);
}
// Load Formulas
item = DOMHelper.findFirstElementNode(list.getFirstChild(), TAG_FORMULA);
while (item != null) {
addItem(FormulaItem.fromDocument(this, item));
item = DOMHelper.findNextElementNode(item, TAG_FORMULA);
}
}
}
