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

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

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

import com.vaadin.ui.Component;
import com.vaadin.ui.ComponentContainer;
import com.vaadin.ui.CssLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;

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")
class MenuGroupPanel extends CssLayout {
    public static final String STYLE = MenuPanel.STYLE + "-group";

    private final MenuItem groupItem;
    private final MenuItemClickListener clickListener;

    private final Label captionLabel;
    private final ComponentContainer content;

    private MenuItemFilter filter = null;

    private boolean hiddenByStyle = false;

    public MenuGroupPanel(final MenuItem groupItem, final MenuItemClickListener clickListener) {
        super();
        setPrimaryStyleName(STYLE);
        this.groupItem = groupItem;
        this.clickListener = clickListener;

        captionLabel = new Label();
        captionLabel.setPrimaryStyleName(STYLE + "-caption");

        content = new VerticalLayout();
        content.setPrimaryStyleName(STYLE + "-content");

        addComponents(captionLabel, content);

        updateFromItem();
    }

    public void setFilter(final MenuItemFilter filter) {
        if (this.filter == filter) {
            return;
        }

        this.filter = filter;
        applyFilter();
    }

    private void applyFilter() {
        int countDisplayed = 0;
        for (final Component comp : content) {
            if (comp instanceof MenuItemComponent) {
                final MenuItemComponent menuItemComp = (MenuItemComponent) comp;

                final MenuItem menuItem = menuItemComp.getMenuItem();
                final boolean displayed = filter == null || filter.accept(menuItem);
                menuItemComp.setHiddenByStyle(!displayed);

                if (displayed) {
                    countDisplayed++;
                }
            }
        }

        //
        setHiddenByStyle(countDisplayed <= 0);
    }

    private void updateFromItem() {
        captionLabel.setValue(groupItem.getCaption());

        content.removeAllComponents();
        for (final MenuItem menuItem : groupItem.getChildren()) {
            final MenuItemComponent menuItemComp = new MenuItemComponent(menuItem, clickListener);
            content.addComponent(menuItemComp);
        }

        applyFilter();
    }

    private final void setHiddenByStyle(final boolean hidden) {
        Theme.setHidden(this, hidden);
        this.hiddenByStyle = hidden;
    }

    public final boolean isHiddenByStyle() {
        return hiddenByStyle;
    }
}