ru.codeinside.gses.webui.supervisor.TaskManager.java Source code

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Here is the source code for ru.codeinside.gses.webui.supervisor.TaskManager.java

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/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 * Copyright (c) 2013, MPL CodeInside http://codeinside.ru
 */

package ru.codeinside.gses.webui.supervisor;

import com.vaadin.ui.Component;
import com.vaadin.ui.MenuBar;
import com.vaadin.ui.VerticalLayout;

import java.io.Serializable;

final public class TaskManager extends VerticalLayout {

    interface BlockProducer extends Serializable {
        Component createBlock();
    }

    static class ExecutionsBlockProducer implements BlockProducer {
        @Override
        public Component createBlock() {
            return new ExecutionsPanel();
        }
    }

    static class ExceptionsBlockProducer implements BlockProducer {
        @Override
        public Component createBlock() {
            return new ExceptionsPanel();
        }
    }

    Component currentBlock;
    final MenuBar menu = new MenuBar();

    public TaskManager() {
        setSizeFull();
        setMargin(false);
        setSpacing(false);
        menu.setWidth(100, UNITS_PERCENTAGE);
        menu.addStyleName("submenu");
        addComponent(menu);
        setExpandRatio(menu, 0.001f);

        addBlock("?? ??", new ExecutionsBlockProducer());
        addBlock(" ??", new ExceptionsBlockProducer());
    }

    void createBlock(final BlockProducer blockProducer) {
        currentBlock = blockProducer.createBlock();
        addComponent(currentBlock);
        setExpandRatio(currentBlock, 0.999f);
    }

    private void addBlock(final String title, final BlockProducer blockProducer) {
        final MenuBar.MenuItem item = menu.addItem(title, new BlockSelector(blockProducer));
        if (currentBlock == null) {
            item.setEnabled(false);
            createBlock(blockProducer);
        }
    }

    class BlockSelector implements MenuBar.Command {
        final BlockProducer blockProducer;

        BlockSelector(BlockProducer blockProducer) {
            this.blockProducer = blockProducer;
        }

        @Override
        public void menuSelected(final MenuBar.MenuItem selectedItem) {
            for (MenuBar.MenuItem i : menu.getItems()) {
                i.setEnabled(i != selectedItem);
            }
            if (currentBlock != null) {
                removeComponent(currentBlock);
            }
            createBlock(blockProducer);
        }
    }

}