tv.dyndns.kishibe.qmaclone.client.ui.WidgetMultiItemSelector.java Source code

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Here is the source code for tv.dyndns.kishibe.qmaclone.client.ui.WidgetMultiItemSelector.java

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//The MIT License
//
//Copyright (c) 2009 nodchip
//
//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so, subject to the following conditions:
//
//The above copyright notice and this permission notice shall be included in
//all copies or substantial portions of the Software.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//THE SOFTWARE.
package tv.dyndns.kishibe.qmaclone.client.ui;

import java.util.List;
import java.util.Set;

import tv.dyndns.kishibe.qmaclone.client.util.HasIndex;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * {@link Set} ?? {@link Widget}. ? {@link Enum}
 * ?toString()???????????????
 * 
 * @author nodchip
 * @param <T>
 *            
 */
public class WidgetMultiItemSelector<T extends Enum<T> & HasIndex> extends VerticalPanel implements ClickHandler {
    @VisibleForTesting
    final ListBox listBox = new ListBox();
    @VisibleForTesting
    final CheckBox checkBoxMultiSelect = new CheckBox("?");
    @VisibleForTesting
    CheckBox[] checkBoxs;
    @VisibleForTesting
    final HorizontalPanel panelMultiSelect = new HorizontalPanel();
    private T[] items;

    public WidgetMultiItemSelector(String title, T[] items, int columns) {
        this.items = items;

        setHorizontalAlignment(ALIGN_CENTER);

        // 
        {
            listBox.setWidth("150px");
            for (T item : items) {
                listBox.addItem(item.toString());
            }

            checkBoxMultiSelect.addClickHandler(this);

            final HorizontalPanel panel = new HorizontalPanel();
            panel.setVerticalAlignment(ALIGN_MIDDLE);
            panel.add(listBox);
            panel.add(checkBoxMultiSelect);
            add(panel);
        }

        // 
        {
            final VerticalPanel[] panels = new VerticalPanel[columns];
            for (int i = 0; i < panels.length; ++i) {
                panels[i] = new VerticalPanel();
                panelMultiSelect.add(panels[i]);
            }

            checkBoxs = new CheckBox[items.length];
            for (int itemIndex = 0; itemIndex < items.length; ++itemIndex) {
                checkBoxs[itemIndex] = new CheckBox(items[itemIndex].toString());
                panels[itemIndex / ((items.length + columns - 1) / columns)].add(checkBoxs[itemIndex]);
            }
            add(panelMultiSelect);
        }

        checkBoxMultiSelect.setValue(false);
        listBox.setSelectedIndex(0);

        set(ImmutableSet.of(items[0]));
    }

    public void set(Set<T> set) {
        if (set.isEmpty()) {
            // ??0??
            checkBoxMultiSelect.setValue(false);
            listBox.setSelectedIndex(0);

        } else if (set.size() == 1) {
            // 1????????
            checkBoxMultiSelect.setValue(false);
            listBox.setSelectedIndex(set.iterator().next().getIndex());

        } else {
            checkBoxMultiSelect.setValue(true);
            for (CheckBox checkBox : checkBoxs) {
                checkBox.setValue(false);
            }
            for (T element : set) {
                checkBoxs[element.getIndex()].setValue(true);
            }
        }

        updateWidget();
    }

    public Set<T> get() {
        final boolean multiSelect = isMultiSelect();

        if (!multiSelect) {
            Set<T> set = Sets.newHashSet();
            set.add(items[listBox.getSelectedIndex()]);
            return set;
        }

        List<T> list = Lists.newArrayList();
        for (int checkBoxIndex = 0; checkBoxIndex < checkBoxs.length; ++checkBoxIndex) {
            if (checkBoxs[checkBoxIndex].getValue()) {
                list.add(items[checkBoxIndex]);
            }
        }
        return Sets.newHashSet(list);
    }

    private void updateWidget() {
        final boolean multiSelect = isMultiSelect();

        listBox.setVisible(!multiSelect);
        panelMultiSelect.setVisible(multiSelect);
    }

    public boolean isMultiSelect() {
        return checkBoxMultiSelect.getValue();
    }

    public void setEnabled(boolean enabled) {
        listBox.setEnabled(enabled);
        checkBoxMultiSelect.setEnabled(enabled);
        for (CheckBox checkBox : checkBoxs) {
            checkBox.setEnabled(enabled);
        }
    }

    @Override
    public void onClick(ClickEvent event) {
        final Widget sender = (Widget) event.getSource();
        if (sender == checkBoxMultiSelect) {
            updateWidget();
        }
    }
}