BaseListViewImpl.java

/*
 * Copyright 2014-2016 CyberVision, 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 org.kaaproject.kaa.server.admin.client.mvp.view.base;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.HasClickHandlers;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DockLayoutPanel;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.ResizeComposite;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.view.client.MultiSelectionModel;

import org.kaaproject.avro.ui.gwt.client.AvroUiResources.AvroUiStyle;
import org.kaaproject.avro.ui.gwt.client.widget.AlertPanel;
import org.kaaproject.avro.ui.gwt.client.widget.AlertPanel.Type;
import org.kaaproject.avro.ui.gwt.client.widget.grid.AbstractGrid;
import org.kaaproject.avro.ui.gwt.client.widget.grid.event.HasRowActionEventHandlers;
import org.kaaproject.kaa.common.dto.HasId;
import org.kaaproject.kaa.server.admin.client.KaaAdminResources.KaaAdminStyle;
import org.kaaproject.kaa.server.admin.client.mvp.view.BaseListView;
import org.kaaproject.kaa.server.admin.client.mvp.view.widget.ImageTextButton;
import org.kaaproject.kaa.server.admin.client.util.Utils;

public abstract class BaseListViewImpl<T extends HasId>
    extends ResizeComposite
    implements BaseListView<T> {

  private static BaseListViewImplUiBinder uiBinder = GWT.create(BaseListViewImplUiBinder.class);
  @UiField(provided = true)
  public final AlertPanel errorPanel;
  @UiField(provided = true)
  public final KaaAdminStyle kaaAdminStyle;
  @UiField(provided = true)
  public final AvroUiStyle avroUiStyle;
  @UiField
  public DockLayoutPanel dockPanel;
  @UiField
  public HorizontalPanel backButtonPanel;
  @UiField
  public Button backButton;
  @UiField
  public Label titleLabel;
  @UiField
  public HorizontalPanel buttonsPanel;
  @UiField
  public HorizontalPanel supportPanel;
  @UiField(provided = true)
  public ImageTextButton addButton;
  protected AbstractGrid<T, String> grid;
  protected Presenter presenter;
  protected boolean editable;

  /**
   * Instantiates a new BaseListViewImpl.
   */
  public BaseListViewImpl(boolean editable) {
    this.editable = editable;
    initAddButton();
    errorPanel = new AlertPanel(Type.ERROR);
    kaaAdminStyle = Utils.kaaAdminStyle;
    avroUiStyle = Utils.avroUiStyle;

    initWidget(createAndBindUi());

    grid = createGrid();

    dockPanel.add(grid);

    titleLabel.setText(titleString());
    addButton.setVisible(editable);

    clearError();
  }

  protected void initAddButton() {
    addButton = new ImageTextButton(Utils.resources.plus(), addButtonString());
  }

  protected void appendToolbarWidget(Widget widget) {
    buttonsPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);
    buttonsPanel.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
    buttonsPanel.add(widget);
    buttonsPanel.setCellHeight(widget, "100%");
  }

  protected Widget createAndBindUi() {
    return uiBinder.createAndBindUi(this);
  }

  @Override
  public HasClickHandlers getAddButton() {
    return addButton;
  }

  @Override
  public HasClickHandlers getBackButton() {
    return backButton;
  }

  @Override
  public void setBackEnabled(boolean enabled) {
    backButtonPanel.setVisible(enabled);
  }

  @Override
  public void setAddButtonEnabled(boolean enabled) {
    addButton.setEnabled(enabled);
  }

  @Override
  public MultiSelectionModel<T> getSelectionModel() {
    return grid.getSelectionModel();
  }

  @Override
  public AbstractGrid<T, String> getListWidget() {
    return grid;
  }

  @Override
  public HasRowActionEventHandlers<String> getRowActionsSource() {
    return grid;
  }

  @Override
  public void clearError() {
    errorPanel.setMessage("");
    errorPanel.setVisible(false);
  }

  @Override
  public void setErrorMessage(String message) {
    errorPanel.setMessage(message);
    errorPanel.setVisible(true);
  }

  @Override
  public void setPresenter(Presenter presenter) {
    this.presenter = presenter;
  }

  protected abstract AbstractGrid<T, String> createGrid();

  protected abstract String titleString();

  protected abstract String addButtonString();

  interface BaseListViewImplUiBinder extends UiBinder<Widget, BaseListViewImpl<?>> {
  }

}