scout.tree.keystrokes.TreeExpandOrDrillDownKeyStroke.js Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright (c) 2014-2015 BSI Business Systems Integration AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     BSI Business Systems Integration AG - initial API and implementation
 ******************************************************************************/
scout.TreeExpandOrDrillDownKeyStroke = function(tree, modifierBitMask) {
  scout.TreeExpandOrDrillDownKeyStroke.parent.call(this, tree, modifierBitMask);
  this.which = [scout.keys.ADD];
  this.renderingHints.text = '+';
  this.renderingHints.$drawingArea = function($drawingArea, event) {
    var currentNode = event._treeCurrentNode;
    if (this.isNodeExpandable(currentNode)) {
      return currentNode.$node;
    } else if (currentNode.childNodes.length > 0) {
      return currentNode.childNodes[0].$node;
    }
  }.bind(this);
};
scout.inherits(scout.TreeExpandOrDrillDownKeyStroke, scout.AbstractTreeNavigationKeyStroke);

scout.TreeExpandOrDrillDownKeyStroke.prototype._accept = function(event) {
  var accepted = scout.TreeExpandOrDrillDownKeyStroke.parent.prototype._accept.call(this, event);
  var currentNode = event._treeCurrentNode;
  return accepted && currentNode && (this.isNodeExpandable(currentNode) || currentNode.childNodes.length > 0);
};

scout.TreeExpandOrDrillDownKeyStroke.prototype.isNodeExpandable = function(node) {
  return !node.expanded && !node.leaf;
};

scout.TreeExpandOrDrillDownKeyStroke.prototype.handle = function(event) {
  var currentNode = event._treeCurrentNode;
  if (this.isNodeExpandable(currentNode)) {
    this.field.expandNode(currentNode, {
      lazy: false // always show all nodes on node double click
    });
  } else if (currentNode.childNodes.length > 0) {
    this.selectNodesAndReveal(currentNode.childNodes[0], true);
  }
};