/*
 * Copyright 2011 JBoss 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.drools.guvnor.client.decisiontable.widget;

import org.drools.guvnor.client.messages.Constants;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Panel;

/**
 * Simple container for controls to manipulate a Decision Table
 */
public class DecisionTableControlsWidget extends Composite {

    private Panel                       panel    = new HorizontalPanel();

    private Button                      btnAddRow;
    private Button                      btnOtherwise;
    private AbstractDecisionTableWidget dtable;

    // Resources
    protected static final Constants    messages = GWT.create( Constants.class );

    public DecisionTableControlsWidget() {

        // Add row button
        btnAddRow = new Button( messages.AddRow(),
                                       new ClickHandler() {

                                           public void onClick(ClickEvent event) {
                                               if ( dtable != null ) {
                                                   dtable.appendRow();
                                               }
                                           }
                                       } );
        panel.add( btnAddRow );

        btnOtherwise = new Button( "Otherwise",
                                          new ClickHandler() {

                                              public void onClick(ClickEvent event) {
                                                  if ( dtable != null ) {
                                                      dtable.makeOtherwiseCell();
                                                  }
                                              }
                                          } );
        btnOtherwise.setEnabled( false );

        panel.add( btnOtherwise );

        initWidget( panel );

    }

    /**
     * Retrieve "otherwise" button
     * 
     * @return
     */
    Button getOtherwiseButton() {
        return this.btnOtherwise;
    }

    /**
     * Inject DecisionTable to which these controls relate
     * 
     * @param dtable
     */
    void setDecisionTableWidget(AbstractDecisionTableWidget dtable) {
        this.dtable = dtable;
    }

}
