EditSchemaRecordDialog.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.dialog;

import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

import org.kaaproject.avro.ui.gwt.client.widget.AlertPanel;
import org.kaaproject.avro.ui.gwt.client.widget.AvroWidgetsConfig;
import org.kaaproject.avro.ui.gwt.client.widget.FormPopup;
import org.kaaproject.avro.ui.shared.RecordField;
import org.kaaproject.kaa.server.admin.client.mvp.view.widget.RecordPanel;
import org.kaaproject.kaa.server.admin.client.mvp.view.widget.SchemaInfoListBox;
import org.kaaproject.kaa.server.admin.client.util.HasErrorMessage;
import org.kaaproject.kaa.server.admin.client.util.Utils;
import org.kaaproject.kaa.server.admin.shared.schema.SchemaInfoDto;

import java.util.List;

public class EditSchemaRecordDialog
    extends FormPopup
    implements ValueChangeHandler<SchemaInfoDto>, HasErrorMessage {

  private AlertPanel errorPanel;

  private SchemaInfoListBox schemaBox;
  private RecordPanel schemaRecordPanel;
  private Button saveButton;
  private Listener listener;

  /**
   * Instantiates a new EditSchemaRecordDialog.
   */
  public EditSchemaRecordDialog(Listener listener,
                                String title, List<SchemaInfoDto> schemas,
                                int schemaVersion) {
    setWidth("100%");
    setTitle(title);
    this.listener = listener;

    SchemaInfoDto currentValue = null;
    for (SchemaInfoDto schema : schemas) {
      if (schema.getVersion() == schemaVersion) {
        currentValue = schema;
        break;
      }
    }

    VerticalPanel dialogContents = new VerticalPanel();
    dialogContents.setSpacing(4);
    setWidget(dialogContents);

    errorPanel = new AlertPanel(AlertPanel.Type.ERROR);
    errorPanel.setVisible(false);
    dialogContents.add(errorPanel);

    FlexTable table = new FlexTable();
    table.setCellSpacing(6);
    table.addStyleName(Utils.avroUiStyle.fieldWidget());

    Widget schemaVersionLabel = new Label(Utils.constants.schemaVersion());
    schemaVersionLabel.addStyleName(Utils.avroUiStyle.requiredField());
    schemaBox = new SchemaInfoListBox();
    schemaBox.setWidth("50px");
    schemaBox.getElement().getStyle().setMarginLeft(10, Unit.PX);
    schemaBox.setValue(currentValue);
    schemaBox.setAcceptableValues(schemas);
    schemaBox.addValueChangeHandler(this);

    HorizontalPanel versionPanel = new HorizontalPanel();
    versionPanel.add(schemaVersionLabel);
    versionPanel.add(schemaBox);

    table.setWidget(0, 0, versionPanel);

    schemaRecordPanel = new RecordPanel(new AvroWidgetsConfig.Builder()
        .recordPanelWidth(700).createConfig(),
        Utils.constants.schema(), this, false, false);

    //schemaRecordPanel.setWidth("750px");
    schemaRecordPanel.getElement().getStyle().setPropertyPx("minWidth", 750);
    schemaRecordPanel.getRecordWidget().setForceNavigation(true);
    schemaRecordPanel.setPreferredHeightPx(250);
    schemaRecordPanel.addValueChangeHandler(new ValueChangeHandler<RecordField>() {
      @Override
      public void onValueChange(ValueChangeEvent<RecordField> event) {
        validate();
      }
    });

    table.setWidget(1, 0, schemaRecordPanel);
    table.getFlexCellFormatter().setColSpan(1, 0, 2);

    dialogContents.add(table);

    saveButton = new Button(Utils.constants.save(), new ClickHandler() {
      @Override
      public void onClick(ClickEvent event) {
        performSave();
      }
    });

    Button cancelButton = new Button(Utils.constants.cancel(), new ClickHandler() {
      @Override
      public void onClick(ClickEvent event) {
        hide();
        EditSchemaRecordDialog.this.listener.onCancel();
      }
    });
    addButton(saveButton);
    addButton(cancelButton);

    updateValue(currentValue);

    saveButton.setEnabled(false);
  }

  /**
   * Show edit schema record dialog.
   */
  public static void showEditSchemaRecordDialog(Listener listener,
                                                String title, List<SchemaInfoDto> schemas,
                                                int schemaVersion) {
    EditSchemaRecordDialog dialog = new EditSchemaRecordDialog(
        listener, title, schemas, schemaVersion);
    dialog.center();
    dialog.show();
  }

  @Override
  public void onValueChange(ValueChangeEvent<SchemaInfoDto> event) {
    updateValue(event.getValue());
  }

  private void updateValue(SchemaInfoDto schemaInfo) {
    schemaRecordPanel.setValue(schemaInfo.getSchemaForm());
    schemaRecordPanel.setTitle(schemaInfo.getSchemaName());
    validate();
  }

  private void validate() {
    boolean valid = schemaRecordPanel.validate();
    saveButton.setEnabled(valid);
  }

  private void performSave() {
    hide();
    listener.onSave(schemaBox.getValue());
  }

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

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

  public interface Listener {

    public void onSave(SchemaInfoDto newValue);

    public void onCancel();

  }

}