org.activiti.administrator.ui.ConfirmDialog.java Source code

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

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/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.administrator.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);
    }
}