How to use

org.eclipse.jface.viewers.TreeExpansionEvent

constructor

/**
 * Handles a tree collapse event from the SWT widget.
 *
 * @param event
 *            the SWT tree event
 */
protected void handleTreeCollapse(TreeEvent event) {
  if (event.item.getData() != null) {
    fireTreeCollapsed(new TreeExpansionEvent(this, event.item.getData()));
  }
}

/**
 * Handles a tree collapse event from the SWT widget.
 *
 * @param event
 *            the SWT tree event
 */
protected void handleTreeCollapse(TreeEvent event) {
  if (event.item.getData() != null) {
    fireTreeCollapsed(new TreeExpansionEvent(this, event.item.getData()));
  }
}

/**
 * Handles a tree collapse event from the SWT widget.
 *
 * @param event
 *            the SWT tree event
 */
protected void handleTreeCollapse(TreeEvent event) {
  if (event.item.getData() != null) {
    fireTreeCollapsed(new TreeExpansionEvent(this, event.item.getData()));
  }
}

/**
 * Handles a tree expand event from the SWT widget.
 *
 * @param event
 *            the SWT tree event
 */
protected void handleTreeExpand(TreeEvent event) {
  createChildren(event.item);
  if (event.item.getData() != null) {
    fireTreeExpanded(new TreeExpansionEvent(this, event.item.getData()));
  }
}

/**
 * Handles a tree expand event from the SWT widget.
 *
 * @param event
 *            the SWT tree event
 */
protected void handleTreeExpand(TreeEvent event) {
  createChildren(event.item);
  if (event.item.getData() != null) {
    fireTreeExpanded(new TreeExpansionEvent(this, event.item.getData()));
  }
}

/**
 * Handles a tree expand event from the SWT widget.
 *
 * @param event
 *            the SWT tree event
 */
protected void handleTreeExpand(TreeEvent event) {
  createChildren(event.item);
  if (event.item.getData() != null) {
    fireTreeExpanded(new TreeExpansionEvent(this, event.item.getData()));
  }
}

@Override
protected void handleTreeExpand(TreeEvent event) {
  // Fix for Bug 271744 because windows expanding doesn't fire a focus lost
  if( isCellEditorActive() ) {
    applyEditorValue();
  }
  if (contentProviderIsLazy) {
    if (event.item.getData() != null) {
      Item[] children = getChildren(event.item);
      if (children.length == 1 && children[0].getData()==null) {
        // we have a dummy child node, ask for an updated child
        // count
        virtualLazyUpdateChildCount(event.item, children.length);
      }
      fireTreeExpanded(new TreeExpansionEvent(this, event.item
          .getData()));
    }
    return;
  }
  super.handleTreeExpand(event);
}

protected void handleTreeExpand(TreeEvent event) {
  // Fix for Bug 271744 because windows expanding doesn't fire a focus lost
  if( isCellEditorActive() ) {
    applyEditorValue();
  }
  
  if (contentProviderIsLazy) {
    if (event.item.getData() != null) {
      Item[] children = getChildren(event.item);
      if (children.length == 1 && children[0].getData()==null) {
        // we have a dummy child node, ask for an updated child
        // count
        virtualLazyUpdateChildCount(event.item, children.length);
      }
      fireTreeExpanded(new TreeExpansionEvent(this, event.item
          .getData()));
    }
    return;
  }
  super.handleTreeExpand(event);
}

@Override
protected void handleTreeExpand(TreeEvent event) {
  // Fix for Bug 271744 because windows expanding doesn't fire a focus lost
  if( isCellEditorActive() ) {
    applyEditorValue();
  }
  if (contentProviderIsLazy) {
    if (event.item.getData() != null) {
      Item[] children = getChildren(event.item);
      if (children.length == 1 && children[0].getData()==null) {
        // we have a dummy child node, ask for an updated child
        // count
        virtualLazyUpdateChildCount(event.item, children.length);
      }
      fireTreeExpanded(new TreeExpansionEvent(this, event.item
          .getData()));
    }
    return;
  }
  super.handleTreeExpand(event);
}