Package com.google.gdt.eclipse.designer.gwtext.model.widgets

Source Code of com.google.gdt.eclipse.designer.gwtext.model.widgets.BaseItemInfo

/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.google.gdt.eclipse.designer.gwtext.model.widgets;

import org.eclipse.wb.core.model.JavaInfo;
import org.eclipse.wb.core.model.ObjectInfo;
import org.eclipse.wb.core.model.broadcast.JavaEventListener;
import org.eclipse.wb.internal.core.model.creation.CreationSupport;
import org.eclipse.wb.internal.core.model.description.ComponentDescription;
import org.eclipse.wb.internal.core.utils.ast.AstEditor;
import org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils;

import java.util.List;

/**
* Model for <code>menu.TextItem</code>.
*
* @author scheglov_ke
* @coverage GWTExt.model
*/
public class BaseItemInfo extends ComponentInfo {
  ////////////////////////////////////////////////////////////////////////////
  //
  // Constructor
  //
  ////////////////////////////////////////////////////////////////////////////
  public BaseItemInfo(AstEditor editor,
      ComponentDescription description,
      CreationSupport creationSupport) throws Exception {
    super(editor, description, creationSupport);
    fetchElement_duringParse();
  }

  ////////////////////////////////////////////////////////////////////////////
  //
  // Refresh
  //
  ////////////////////////////////////////////////////////////////////////////
  @Override
  protected void refresh_afterCreate() throws Exception {
    super.refresh_afterCreate();
    fetchElement();
  }

  private void fetchElement_duringParse() {
    addBroadcastListener(new JavaEventListener() {
      @Override
      public void bindComponents(List<JavaInfo> components) throws Exception {
        fetchElement();
      }
    });
  }

  /**
   * <code>TextItem</code> and <code>Separator</code> have no element initially, so we need this
   * workaround.
   */
  private void fetchElement() throws Exception {
    ObjectInfo parent = getParent();
    if (parent instanceof MenuInfo
        && ReflectionUtils.getFieldObject(getObject(), "element") == null) {
      MenuInfo parentMenu = (MenuInfo) parent;
      int index = parentMenu.getChildrenJava().indexOf(this);
      Object[] items =
          (Object[]) ReflectionUtils.invokeMethod(parentMenu.getObject(), "getItems()");
      Object element = ReflectionUtils.invokeMethod(items[index], "getElement()");
      ReflectionUtils.invokeMethod(
          getObject(),
          "setElement(com.google.gwt.user.client.Element)",
          element);
    }
  }
}
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