BreadcrumbsView.java

/**
 * Copyright 2011 ArcBees Inc.
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * 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.gwtplatform.samples.hplace.client.view;

import com.google.gwt.core.client.GWT;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.InlineHyperlink;
import com.google.gwt.user.client.ui.InlineLabel;
import com.google.gwt.user.client.ui.Widget;
import com.google.inject.Inject;

import com.gwtplatform.mvp.client.ViewImpl;
import com.gwtplatform.mvp.client.proxy.PlaceManager;
import com.gwtplatform.samples.hplace.client.presenter.BreadcrumbsPresenter;
import com.gwtplatform.samples.hplace.client.presenter.BreadcrumbsPresenter.MyView;

import de.barop.gwt.client.ui.InlineHyperlinkPushState;

/**
 * This is the top-level view of the application. Every time another presenter
 * wants to reveal itself, {@link BreadcrumbPresenterView} will add its content
 * of the target inside the {@code mainContantPanel}.
 *
 * @author Philippe Beaudoin
 * @author Christian Goudreau
 */
public class BreadcrumbsView extends ViewImpl implements MyView {
  interface BreadcrumbsViewUiBinder extends UiBinder<Widget, BreadcrumbsView> {
  }

  private static BreadcrumbsViewUiBinder uiBinder = GWT.create(BreadcrumbsViewUiBinder.class);

  public final Widget widget;

  @UiField
  FlowPanel breadcrumbs;

  @UiField
  FlowPanel mainContentPanel;
  private final PlaceManager placeManager;

  @Inject
  public BreadcrumbsView(PlaceManager placeManager) {
    this.placeManager = placeManager;
    widget = uiBinder.createAndBindUi(this);
  }

  @Override
  public Widget asWidget() {
    return widget;
  }

  @Override
  public void clearBreadcrumbs(int breadcrumbSize) {
    breadcrumbs.clear();
    for (int i = 0; i < breadcrumbSize; ++i) {
      if (i > 0) {
        breadcrumbs.add(new InlineLabel(" > "));
      }
      breadcrumbs.add(new InlineHyperlinkPushState("Loading title...",
          placeManager.buildRelativeHistoryToken(i + 1)));
    }
  }

  @Override
  public void setBreadcrumbs(int index, String title) {
    InlineHyperlink hyperlink = (InlineHyperlink) breadcrumbs.getWidget(index * 2);
    if (title == null) {
      hyperlink.setHTML("Unknown title");
    } else {
      hyperlink.setHTML(title);
    }
  }

  @Override
  public void setInSlot(Object slot, Widget content) {
    if (slot == BreadcrumbsPresenter.TYPE_SetMainContent) {
      setMainContent(content);
    } else {
      super.setInSlot(slot, content);
    }
  }

  private void setMainContent(Widget content) {
    mainContentPanel.clear();

    if (content != null) {
      mainContentPanel.add(content);
    }
  }

}