/*
 * Copyright (c) 2013, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License 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.dart.tools.ui.internal.typehierarchy;

import com.google.dart.engine.element.ClassElement;
import com.google.dart.engine.element.Element;
import com.google.dart.tools.ui.actions.DartEditorActionDefinitionIds;
import com.google.dart.tools.ui.internal.text.functions.AbstractInformationControl;
import com.google.dart.tools.ui.internal.viewsupport.ColoringLabelProvider;

import org.eclipse.jface.viewers.AbstractTreeViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;

/**
 * Show hierarchy in light-weight control.
 */
public class HierarchyInformationControl_OLD extends AbstractInformationControl {
  private TypeHierarchyContentProvider_OLD contentProvider;
  private TypeHierarchyLabelProvider_OLD labelProvider;

  public HierarchyInformationControl_OLD(Shell parent, int shellStyle, int treeStyle) {
    super(parent, shellStyle, treeStyle, DartEditorActionDefinitionIds.OPEN_HIERARCHY, true);
  }

  @Override
  public void setInput(Object _input) {
    Element input = (Element) _input;
    ClassElement enclosingClass = input.getAncestor(ClassElement.class);
    Object selection = enclosingClass != null ? enclosingClass : input;
    inputChanged(new Object[] {input}, selection);
  }

  @Override
  protected void configureShell(Shell shell) {
    super.configureShell(shell);
    shell.setText("Type Hierarchy");
  }

  @Override
  protected TreeViewer createTreeViewer(Composite parent, int style) {
    Tree tree = new Tree(parent, SWT.SINGLE | (style & ~SWT.MULTI));
    GridData gd = new GridData(GridData.FILL_BOTH);
    gd.heightHint = tree.getItemHeight() * 12;
    tree.setLayoutData(gd);

    TreeViewer treeViewer = new TreeViewer(tree);
    treeViewer.setAutoExpandLevel(AbstractTreeViewer.ALL_LEVELS);

    contentProvider = new TypeHierarchyContentProvider_OLD();
    treeViewer.setContentProvider(contentProvider);

    labelProvider = new TypeHierarchyLabelProvider_OLD(contentProvider.getLightPredicate());
    ColoringLabelProvider coloringLabelProvider = new ColoringLabelProvider(labelProvider);
    treeViewer.setLabelProvider(coloringLabelProvider);
    coloringLabelProvider.setOwnerDrawEnabled(true);

    return treeViewer;
  }

  @Override
  protected String getId() {
    return "com.google.dart.tools.ui.internal.typehierarchy.HierarchyInformationControl";
  }

  @Override
  protected Object getSelectedElement() {
    Object selectedElement = super.getSelectedElement();
    return contentProvider.convertSelectedElement(selectedElement);
  }
}