de.metas.ui.web.vaadin.components.menu.MenuPanelPage.java Source code

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Here is the source code for de.metas.ui.web.vaadin.components.menu.MenuPanelPage.java

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package de.metas.ui.web.vaadin.components.menu;

import java.util.List;

import com.google.common.base.Objects;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableList;
import com.vaadin.ui.Component;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.TextField;

import de.metas.ui.web.vaadin.theme.Theme;
import de.metas.ui.web.window.shared.menu.MenuItem;

/*
 * #%L
 * metasfresh-webui
 * %%
 * Copyright (C) 2016 metas GmbH
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 2 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-2.0.html>.
 * #L%
 */

@SuppressWarnings("serial")
public class MenuPanelPage extends HorizontalLayout {
    // UI
    private TextField searchTextField;
    private final Label nothingFoundLabel;

    private final MenuItemClickListener clickListener;

    private boolean menuItemsStaled = false;
    private Supplier<List<? extends MenuItem>> menuItemsSupplier = null;

    private MenuItemFilter filter = MenuItemFilter.ACCEPT_ALL;

    public MenuPanelPage(final MenuItemClickListener clickListener) {
        super();
        setPrimaryStyleName(MenuPanel.STYLE + "-container");

        this.clickListener = clickListener;

        nothingFoundLabel = new Label("No results found");
        nothingFoundLabel.setStyleName(MenuPanel.STYLE + "-nothingfound-label");
    }

    void setSearchTextField(final TextField searchTextField) {
        this.searchTextField = searchTextField;
    }

    public void setMenuItems(final Supplier<List<? extends MenuItem>> menuItemsSupplier) {
        this.menuItemsStaled = true;
        this.menuItemsSupplier = menuItemsSupplier;
    }

    public void updateIfStaled() {
        if (!menuItemsStaled) {
            return;
        }

        final List<? extends MenuItem> menuItems = menuItemsSupplier == null ? ImmutableList.of()
                : menuItemsSupplier.get();

        //
        if (searchTextField != null) {
            searchTextField.setValue("");
        }
        this.filter = MenuItemFilter.ACCEPT_ALL; // reset filter

        //
        removeAllComponents();
        if (menuItems != null && !menuItems.isEmpty()) {
            for (final MenuItem groupItem : menuItems) {
                final MenuGroupPanel itemComp = new MenuGroupPanel(groupItem, clickListener);
                addComponent(itemComp);
            }
        }

        Theme.setHidden(nothingFoundLabel, true);
        addComponent(nothingFoundLabel);

        //
        menuItemsStaled = false;
        menuItemsSupplier = null;
    }

    public void setFilter(final MenuItemFilter filter) {
        if (Objects.equal(this.filter, filter)) {
            return;
        }

        this.filter = filter;

        int countDisplayed = 0;
        for (final Component menuGroupComp : this) {
            if (menuGroupComp instanceof MenuGroupPanel) {
                final MenuGroupPanel menuGroupPanel = (MenuGroupPanel) menuGroupComp;
                menuGroupPanel.setFilter(filter);

                if (!menuGroupPanel.isHiddenByStyle()) {
                    countDisplayed++;
                }
            }
        }

        Theme.setHidden(nothingFoundLabel, countDisplayed > 0);
    }
}