BootstrapNavigatorView.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.explorer.navigator.view;

import javax.enterprise.context.Dependent;

import com.google.gwt.core.client.GWT;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.Widget;
import org.gwtbootstrap3.client.ui.Column;
import org.gwtbootstrap3.client.ui.Container;
import org.gwtbootstrap3.client.ui.Row;
import org.gwtbootstrap3.client.ui.constants.ColumnSize;
import org.kie.workbench.common.stunner.client.widgets.explorer.navigator.NavigatorItem;
import org.kie.workbench.common.stunner.client.widgets.explorer.navigator.NavigatorItemView;
import org.kie.workbench.common.stunner.client.widgets.explorer.navigator.NavigatorView;

@Dependent
public class BootstrapNavigatorView
        extends Composite
        implements NavigatorView<NavigatorItem<?>> {

    interface ViewBinder extends UiBinder<Widget, BootstrapNavigatorView> {

    }

    private static ViewBinder uiBinder = GWT.create(ViewBinder.class);

    @UiField
    FlowPanel mainPanel;

    @UiField
    FlowPanel loadingPanel;

    @UiField
    Container container;

    private Row currentRow;
    private int itemCounter;

    public BootstrapNavigatorView() {
        initWidget(uiBinder.createAndBindUi(this));
        this.currentRow = null;
        this.itemCounter = 0;
        setLoading(false);
    }

    @Override
    public BootstrapNavigatorView add(final NavigatorItemView<NavigatorItem<?>> view) {
        addItem(view.asWidget());
        return this;
    }

    @Override
    public BootstrapNavigatorView clear() {
        container.clear();
        resetRow();
        return this;
    }

    @Override
    public NavigatorView<NavigatorItem<?>> setLoading(final boolean loading) {
        container.setVisible(!loading);
        loadingPanel.setVisible(loading);
        return this;
    }

    private void addItem(final IsWidget widget) {
        if (null == currentRow || (itemCounter == 4)) {
            resetRow();
        }
        final Column column = new Column(ColumnSize.MD_3);
        column.add(widget);
        currentRow.add(column);
        itemCounter++;
    }

    private void resetRow() {
        currentRow = new Row();
        container.add(currentRow);
        itemCounter = 0;
    }
}