VerticalDecoratedTemplateDataGridWidget.java

/*
 * Copyright 2012 Red Hat, Inc. and/or its affiliates.
 *
 * 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.workbench.screens.guided.template.client.editor;

import com.google.gwt.event.dom.client.ScrollEvent;
import com.google.gwt.event.dom.client.ScrollHandler;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.VerticalPanel;
import org.drools.workbench.screens.guided.template.client.editor.events.SetTemplateDataEvent;
import org.kie.workbench.common.widgets.decoratedgrid.client.widget.ResourcesProvider;

/**
 * Vertical implementation of DecoratedGridWidget for Template data
 */
public class VerticalDecoratedTemplateDataGridWidget extends AbstractDecoratedTemplateDataGridWidget {

    public VerticalDecoratedTemplateDataGridWidget( ResourcesProvider<TemplateDataColumn> resources,
                                                    TemplateDataCellFactory cellFactory,
                                                    TemplateDataCellValueFactory cellValueFactory,
                                                    TemplateDropDownManager dropDownManager,
                                                    boolean isReadOnly,
                                                    EventBus eventBus ) {
        super( resources,
               cellFactory,
               cellValueFactory,
               eventBus,
               new HorizontalPanel(),
               new VerticalPanel(),
               new VerticalMergableTemplateDataGridWidget( resources,
                                                           cellFactory,
                                                           cellValueFactory,
                                                           dropDownManager,
                                                           isReadOnly,
                                                           eventBus ),
               new TemplateDataHeaderWidget( resources,
                                             isReadOnly,
                                             eventBus ),
               new VerticalTemplateDataSidebarWidget( resources,
                                                      isReadOnly,
                                                      eventBus ) );

        //Wire-up event handlers
        eventBus.addHandler( SetTemplateDataEvent.TYPE,
                             this );
    }

    /**
     * Return a ScrollHandler to ensure the Header and Sidebar are repositioned
     * according to the position of the scroll bars surrounding the GridWidget
     */
    @Override
    protected ScrollHandler getScrollHandler() {
        return new ScrollHandler() {

            public void onScroll( ScrollEvent event ) {
                headerWidget.setScrollPosition( scrollPanel.getHorizontalScrollPosition() );
                sidebarWidget.setScrollPosition( scrollPanel.getVerticalScrollPosition() );
            }

        };
    }

}