Examples of com.extjs.gxt.ui.client.data.TreeModel

com.extjs.gxt.ui.client.data.TreeModel
A Model that supports parent and children. Change events bubble to parent elements.
Events:
Update : ChangeEvent(source)

Fires after the the model is updated.
- source : this
Add : ChangeEvent(source, parent, item, index)

Fires after a child model is added.
- source : this (events bubble)
- parent : the parent model
- item : the item that was added
- index : the insert location
Remove : ChangeEvent(source, parent, item)

Fires after a child model is added.
- source : this (events bubble)
- parent : the parent model
- item : the item that was removed

  @SuppressWarnings("rawtypes")
  protected void handleAppendDrop(DNDEvent event, TreeItem item) {
    List sel = event.getData();
    if (sel.size() > 0) {
      if (sel.get(0) instanceof ModelData) {
        TreeModel tm = (TreeModel) sel.get(0);
        ModelData p = item.getModel();
        appendModel(p, tm, item.getItemCount());
      } else {
        for (int i = 0; i < sel.size(); i++) {
          TreeItem ti = (TreeItem) sel.get(i);

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  }


  protected void appendModel(ModelData p, List<ModelData> models, int index) {
    if (models.size() == 0) return;
    if (models.get(0) instanceof TreeModel) {
      TreeModel test = (TreeModel) models.get(0);
      // drop is in form from tree store
      if (test.getPropertyNames().contains("model")) {


        List<ModelData> children = new ArrayList<ModelData>();
        for (ModelData tm : models) {
          ModelData child = tm.get("model");
          children.add(child);

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  }


  protected void appendModel(ModelData p, List<ModelData> models, int index) {
    if (models.size() == 0) return;
    if (models.get(0) instanceof TreeModel) {
      TreeModel test = (TreeModel) models.get(0);
      // drop is in form from tree store
      if (test.getPropertyNames().contains("model")) {


        List<ModelData> children = new ArrayList<ModelData>();
        for (ModelData tm : models) {
          ModelData child = tm.get("model");
          children.add(child);

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  public void clearFilters() {
    if (isFiltered()) {
      filtersEnabled = false;
      snapshot = null;
      for (M m : all) {
        TreeModel wrap = findWrapper(m);
        wrap.remove("filtered");
      }
      fireEvent(Filter, createStoreEvent());
    }
  }

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   */
  public M getChild(M parent, int index) {
    if (parent == null) {
      return getFilteredChildren(rootWrapper).get(index);
    }
    TreeModel p = findWrapper(parent);
    if (p != null) {
      return getFilteredChildren(p).get(index);
    }
    return null;
  }

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   */
  public int getChildCount(M parent) {
    if (parent == null) {
      return getChildCount();
    } else {
      TreeModel p = findWrapper(parent);
      if (p != null) {
        return getFilteredChildren(p).size();
      }
      return -1;
    }

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   * @param parent the parent
   * @param deep true to return all children recursively
   * @return the children or null if parent not found in the store
   */
  public List<M> getChildren(M parent, boolean deep) {
    TreeModel p = findWrapper(parent);
    if (p != null) {
      if (deep) {
        List<M> temp = new ArrayList<M>();
        List<M> children = getFilteredChildren(p);
        for (M child : children) {

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   * 
   * @param item the item
   * @return the item's parent
   */
  public M getParent(M item) {
    TreeModel child = findWrapper(item);
    if (child != null) {
      TreeModel p = child.getParent();
      if (p != null) {
        return unwrap(p);
      }
    }
    return null;

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   */
  public boolean hasChildren(M parent) {
    if (parent == null) {
      return rootWrapper.getChildCount() > 0;
    } else {
      TreeModel p = findWrapper(parent);
      if (p != null) {
        for (ModelData child : p.getChildren()) {
          if (!isFiltered((TreeModel) child)) {
            return true;
          }
        }
      }

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   * @param children the children
   * @param index the insert index
   * @param addChildren true to recursively add all children
   */
  public void insert(M parent, List<M> children, int index, boolean addChildren) {
    TreeModel wrapper = findWrapper(parent);
    if (wrapper != null) {
      List<TreeModel> insert = new ArrayList<TreeModel>();
      for (M model : children) {
        insert.add(wrap(model));
      }

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