org.accelerators.activiti.admin.ui.ConfirmDialog.java Source code

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Here is the source code for org.accelerators.activiti.admin.ui.ConfirmDialog.java

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/*
 * BPM Technology Accelerators Development Team, BPM Technology 
 * Accelerators Community and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution 
 * for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.accelerators.activiti.admin.ui;

import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;

/**
 * Used to confirm events.
 * 
 * @author Patrick Oberg, Joonas Lehtinen, Tommi Laukkanen
 */
public final class ConfirmDialog extends Window implements Button.ClickListener {

    private static final long serialVersionUID = 1L;
    private static final int ONE_HUNDRED_PERCENT = 100;
    private static final int CONFIRMATION_DIALOG_WIDTH = 400;

    private final ConfirmationDialogCallback callback;
    private final Button okButton;
    private final Button cancelButton;

    /**
     * * Constructor for configuring confirmation dialog. * @param caption the
     * dialog caption. * @param question the question. * @param okLabel the Ok
     * button label. * @param cancelLabel the cancel button label. * @param
     * callback the callback.
     */
    public ConfirmDialog(final String caption, final String question, final String okLabel,
            final String cancelLabel, final ConfirmationDialogCallback callback) {

        super(caption);
        setWidth(CONFIRMATION_DIALOG_WIDTH, ConfirmDialog.UNITS_PIXELS);
        okButton = new Button(okLabel, this);
        cancelButton = new Button(cancelLabel, this);
        cancelButton.focus();
        setModal(true);

        this.callback = callback;

        Label label = new Label(question, Label.CONTENT_XHTML);

        if (question != null) {
            addComponent(label);
        }

        final HorizontalLayout buttonLayout = new HorizontalLayout();
        buttonLayout.setSpacing(true);
        buttonLayout.addComponent(okButton);
        buttonLayout.addComponent(cancelButton);
        addComponent(buttonLayout);

        ((VerticalLayout) getContent()).setHeight(ONE_HUNDRED_PERCENT, ConfirmDialog.UNITS_PERCENTAGE);
        ((VerticalLayout) getContent()).setComponentAlignment(buttonLayout, Alignment.BOTTOM_CENTER);
    }

    /** * Event handler for button clicks. * @param event the click event. */
    public void buttonClick(final ClickEvent event) {
        if (getParent() != null) {
            ((Window) getParent()).removeWindow(this);
        }
        callback.response(event.getSource() == okButton);
    }

    /** * Interface for confirmation dialog callbacks. */
    public interface ConfirmationDialogCallback {
        /** * The user response. * @param ok True if user clicked ok. */
        void response(boolean ok);
    }
}