Esempio n. 1
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  /**
   * 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);
  }
Esempio n. 2
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  /**
   * Remove item from the model.
   *
   * <p>If the model and thus item are 'running', the item will be 'stopped'.
   *
   * @param item
   * @throws RuntimeException if item is already in model
   */
  public void removeItem(final ModelItem item) {
    if (is_running && item instanceof PVItem) {
      final PVItem pv = (PVItem) item;
      pv.stop();
      // Delete its samples:
      // For one, so save memory.
      // Also, in case item is later added back in, its old samples
      // will have gaps because the item was stopped
      pv.getSamples().clear();
    }
    if (!items.remove(item)) throw new RuntimeException("Unknown item " + item.getName());
    // Detach item from model
    item.setModel(null);

    // Notify listeners of removed item
    for (ModelListener listener : listeners) listener.itemRemoved(item);

    // Remove axis if unused
    AxisConfig axis = item.getAxis();
    item.setAxis(null);
    if (countActiveItemsOnAxis(axis) == 0) {
      removeAxis(axis);
      fireAxisChangedEvent(null);
    }
  }
Esempio n. 3
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 @Override
 void setModel(Model model) {
   super.setModel(model);
   this.automaticRefresh = model.isAutomaticHistoryRefresh();
 }