org.pentaho.pac.client.common.ui.AccumulatorPanel.java Source code

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Here is the source code for org.pentaho.pac.client.common.ui.AccumulatorPanel.java

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/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright 2008 - 2009 Pentaho Corporation.  All rights reserved.
*/
package org.pentaho.pac.client.common.ui;

import java.util.Iterator;
import java.util.List;

import org.pentaho.pac.client.i18n.Messages;

import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

public class AccumulatorPanel<T> extends HorizontalPanel implements ClickListener {
    Button addToAccumulationBtn = new Button("&gt;"); //$NON-NLS-1$
    Button removeFromAccumulationBtn = new Button("&lt;"); //$NON-NLS-1$
    GenericObjectListBox<T> availableItemsListBox = new GenericObjectListBox<T>(true);
    GenericObjectListBox<T> accumulatedItemsListBox = new GenericObjectListBox<T>(true);
    Label availableItemsLabel = new Label(Messages.getString("availableItemsTitle")); //$NON-NLS-1$
    Label accumulatedItemsLabel = new Label(Messages.getString("assignedItemsTitle")); //$NON-NLS-1$

    public AccumulatorPanel() {
        this(new GenericObjectListBox<T>(true), new GenericObjectListBox<T>(true));
    }

    public AccumulatorPanel(GenericObjectListBox<T> availableItemsListBox,
            GenericObjectListBox<T> accumulatedItemsListBox) {
        this.accumulatedItemsListBox = accumulatedItemsListBox;
        this.availableItemsListBox = availableItemsListBox;

        VerticalPanel centerVerticalPanel = new VerticalPanel();
        centerVerticalPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);
        centerVerticalPanel.add(addToAccumulationBtn);
        centerVerticalPanel.add(removeFromAccumulationBtn);
        centerVerticalPanel.setCellWidth(addToAccumulationBtn, "100%"); //$NON-NLS-1$
        centerVerticalPanel.setCellWidth(removeFromAccumulationBtn, "100%"); //$NON-NLS-1$
        centerVerticalPanel.setSpacing(5);

        VerticalPanel leftVerticalPanel = new VerticalPanel();
        leftVerticalPanel.add(availableItemsLabel);
        leftVerticalPanel.add(availableItemsListBox);
        leftVerticalPanel.setCellWidth(availableItemsListBox, "100%"); //$NON-NLS-1$
        leftVerticalPanel.setCellHeight(availableItemsListBox, "100%"); //$NON-NLS-1$

        VerticalPanel rightVerticalPanel = new VerticalPanel();
        rightVerticalPanel.add(accumulatedItemsLabel);
        rightVerticalPanel.add(accumulatedItemsListBox);
        rightVerticalPanel.setCellWidth(accumulatedItemsListBox, "100%"); //$NON-NLS-1$
        rightVerticalPanel.setCellHeight(accumulatedItemsListBox, "100%"); //$NON-NLS-1$

        setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
        add(leftVerticalPanel);
        add(centerVerticalPanel);
        add(rightVerticalPanel);

        setCellWidth(leftVerticalPanel, "50%"); //$NON-NLS-1$
        setCellWidth(rightVerticalPanel, "50%"); //$NON-NLS-1$
        setCellHeight(leftVerticalPanel, "100%"); //$NON-NLS-1$
        setCellHeight(rightVerticalPanel, "100%"); //$NON-NLS-1$

        leftVerticalPanel.setWidth("100%"); //$NON-NLS-1$
        leftVerticalPanel.setHeight("100%"); //$NON-NLS-1$
        rightVerticalPanel.setWidth("100%"); //$NON-NLS-1$
        rightVerticalPanel.setHeight("100%"); //$NON-NLS-1$ 
        availableItemsListBox.setWidth("100%");//$NON-NLS-1$
        availableItemsListBox.setHeight("100%"); //$NON-NLS-1$
        accumulatedItemsListBox.setWidth("100%"); //$NON-NLS-1$
        accumulatedItemsListBox.setHeight("100%"); //$NON-NLS-1$

        addToAccumulationBtn.addClickListener(this);
        removeFromAccumulationBtn.addClickListener(this);
    }

    public Button getAddToAccumulationBtn() {
        return addToAccumulationBtn;
    }

    public Button getRemoveFromAccumulationBtn() {
        return removeFromAccumulationBtn;
    }

    public GenericObjectListBox<T> getAvailableItemsListBox() {
        return availableItemsListBox;
    }

    public GenericObjectListBox<T> getAccumulatedItemsListBox() {
        return accumulatedItemsListBox;
    }

    public void onClick(Widget sender) {
        if (sender == addToAccumulationBtn) {
            addSelectedItemsToAccumulation();
        } else if (sender == removeFromAccumulationBtn) {
            removeSelectedItemsFromAccumulation();
        }
    }

    protected void removeSelectedItemsFromAccumulation() {
        List<T> selectedObjects = accumulatedItemsListBox.getSelectedObjects();
        accumulatedItemsListBox.removeSelectedObjects();
        for (Iterator<T> iter = selectedObjects.iterator(); iter.hasNext();) {
            availableItemsListBox.addObject(iter.next());
        }
    }

    protected void addSelectedItemsToAccumulation() {
        List<T> selectedObjects = availableItemsListBox.getSelectedObjects();
        availableItemsListBox.removeSelectedObjects();
        for (Iterator<T> iter = selectedObjects.iterator(); iter.hasNext();) {
            accumulatedItemsListBox.addObject(iter.next());
        }
    }
}