DefinitionPaletteGroupWidgetViewImpl.java

/*
 * Copyright 2017 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.kie.workbench.common.stunner.client.widgets.palette.categories.group;

import javax.enterprise.context.Dependent;
import javax.inject.Inject;

import com.google.gwt.event.dom.client.ClickEvent;
import org.jboss.errai.common.client.dom.DOMUtil;
import org.jboss.errai.common.client.dom.ListItem;
import org.jboss.errai.ui.client.local.api.IsElement;
import org.jboss.errai.ui.shared.api.annotations.DataField;
import org.jboss.errai.ui.shared.api.annotations.EventHandler;
import org.jboss.errai.ui.shared.api.annotations.Templated;
import org.kie.workbench.common.stunner.client.widgets.palette.categories.items.DefinitionPaletteItemWidget;
import org.uberfire.commons.validation.PortablePreconditions;

@Templated
@Dependent
public class DefinitionPaletteGroupWidgetViewImpl implements DefinitionPaletteGroupWidgetView,
                                                             IsElement {

    @Inject
    @DataField
    private ListItem moreAnchor;

    @Inject
    @DataField
    private ListItem lessAnchor;

    private Presenter presenter;

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

    @Override
    public void initView() {
        DOMUtil.removeAllChildren(this.getElement());
    }

    @Override
    public void addItem(DefinitionPaletteItemWidget categoryItem) {
        PortablePreconditions.checkNotNull("categoryItem",
                                           categoryItem);
        this.getElement().appendChild(categoryItem.getElement());
    }

    @Override
    public void addAnchors() {
        moreAnchor.getStyle().setProperty("display",
                                          "none");
        lessAnchor.getStyle().setProperty("display",
                                          "none");
        this.getElement().appendChild(moreAnchor);
        this.getElement().appendChild(lessAnchor);
    }

    @Override
    public void showMoreAnchor() {
        moreAnchor.getStyle().setProperty("display",
                                          "block");
        lessAnchor.getStyle().setProperty("display",
                                          "none");
    }

    @Override
    public void showLessAnchor() {
        moreAnchor.getStyle().setProperty("display",
                                          "none");
        lessAnchor.getStyle().setProperty("display",
                                          "block");
    }

    @EventHandler("moreAnchor")
    public void showMore(ClickEvent clickEvent) {
        presenter.showMore();
    }

    @EventHandler("lessAnchor")
    public void showLess(ClickEvent clickEvent) {
        presenter.showLess();
    }
}