ilarkesto.gwt.client.MultiSelectionWidget.java Source code

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Here is the source code for ilarkesto.gwt.client.MultiSelectionWidget.java

Source

/*
 * Copyright 2011 Witoslaw Koczewsi <wi@koczewski.de>, Artjom Kochtchi
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero
 * General Public License as published by the Free Software Foundation, either version 3 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 Affero 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/>.
 */
package ilarkesto.gwt.client;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.FocusListener;
import com.google.gwt.user.client.ui.FocusPanel;
import com.google.gwt.user.client.ui.Widget;

public class MultiSelectionWidget<I extends Object> extends AWidget {

    private FlexTable table;
    private Map<I, CheckBox> items = new HashMap<I, CheckBox>();
    private FocusPanel panel;

    @Override
    protected Widget onInitialization() {
        table = new FlexTable();
        table.setCellPadding(0);
        table.setCellSpacing(0);

        panel = new FocusPanel();
        panel.setStyleName("MultiSelectionWidget");
        panel.setWidget(table);
        return panel;
    }

    public void add(I item) {
        initialize();
        CheckBox checkbox = createCheckbox(item);
        items.put(item, checkbox);
        table.setWidget(table.getRowCount(), 0, checkbox);
    }

    protected CheckBox createCheckbox(I item) {
        CheckBox checkbox;
        if (item instanceof HtmlLabelSupport) {
            checkbox = new CheckBox(((HtmlLabelSupport) item).getHtmlLabel(), true);
        } else {
            checkbox = new CheckBox(item.toString());
        }
        return checkbox;
    }

    public void setItems(Collection<I> items) {
        initialize();
        clear();
        for (I item : items) {
            add(item);
        }
    }

    public List<I> getItems() {
        return new ArrayList(items.keySet());
    }

    public void clear() {
        items.clear();
        table.clear();
    }

    public void setSelected(Collection<I> selectedItems) {
        for (Map.Entry<I, CheckBox> entry : items.entrySet()) {
            entry.getValue().setValue((selectedItems.contains(entry.getKey())));
        }
    }

    public void addSelected(I item) {
        CheckBox checkBox = items.get(item);
        if (checkBox != null)
            checkBox.setValue(true);
    }

    public List<I> getSelected() {
        List<I> ret = new LinkedList<I>();
        for (Map.Entry<I, CheckBox> entry : items.entrySet()) {
            if (entry.getValue().getValue())
                ret.add(entry.getKey());
        }
        return ret;
    }

    public void addFocusListener(FocusListener focusListener) {
        initialize();
        panel.addFocusListener(focusListener);
    }

    public void addKeyDownHandler(KeyDownHandler handler) {
        initialize();
        panel.addKeyDownHandler(handler);
    }

    public void setFocus(boolean focus) {
        initialize();
        panel.setFocus(focus);
    }

}