org.pepstock.jem.gwt.client.commons.MessageBox.java Source code

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Here is the source code for org.pepstock.jem.gwt.client.commons.MessageBox.java

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/**
JEM, the BEE - Job Entry Manager, the Batch Execution Environment
Copyright (C) 2012-2015   Andrea "Stock" Stocchero
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
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 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 org.pepstock.jem.gwt.client.commons;

import org.pepstock.jem.gwt.client.Sizes;

import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.DockPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PopupPanel;

/**
 * Abstratc popup panel which represents a message box (like a javascript Window.alert).
 * 
 * @author Andrea "Stock" Stocchero
 * 
 */
public abstract class MessageBox extends PopupPanel {

    static {
        Styles.INSTANCE.messageBox().ensureInjected();
    }

    private HideHandler hideHandler = null;

    /**
     * A generic message box, like a javascript Window.alert
     * 
     * @param image image to show on west
     * @param title title of message to show
     * @param message content of message to show
     * 
     */
    public MessageBox(ImageResource image, String title, String message) {
        super(false, true);
        setAnimationEnabled(true);
        setGlassEnabled(true);

        setStyleName(Styles.INSTANCE.messageBox().main());

        // sets message
        final HTML msg = new HTML(message);
        msg.addStyleName(Styles.INSTANCE.messageBox().message());

        // sets Max Width!
        int maxWidth = Window.getClientWidth() * 75 / 100;
        getElement().getStyle().setPropertyPx("maxWidth", maxWidth);

        // dialog box content
        DockPanel dock = new DockPanel();
        dock.setSpacing(5);
        final HorizontalPanel flow = new HorizontalPanel();
        flow.setSpacing(4);
        // add buttons to box
        if (getPreferredButtons() != null) {
            for (int i = 0; i < getPreferredButtons().length; i++) {
                PreferredButton button = getPreferredButtons()[i];
                button.setMessageBox(this);
                flow.add(button);
            }
        }

        // sets default button
        final int defaultButtonIndex = flow.getWidgetIndex(getDefaultButton());
        ((PreferredButton) flow.getWidget(defaultButtonIndex))
                .addStyleName(Styles.INSTANCE.common().defaultActionButton());

        dock.add(flow, DockPanel.SOUTH);
        dock.setCellHorizontalAlignment(flow, DockPanel.ALIGN_CENTER);

        // adds title
        if (title != null) {
            final Label t = new Label(title);
            t.addStyleName(Styles.INSTANCE.messageBox().title());
            dock.add(t, DockPanel.NORTH);
            dock.setCellHorizontalAlignment(t, DockPanel.ALIGN_CENTER);

        }

        dock.add(msg, DockPanel.CENTER);
        dock.setCellVerticalAlignment(msg, DockPanel.ALIGN_MIDDLE);

        // adds image
        dock.add(new Image((image == null) ? Images.INSTANCE.info() : image), DockPanel.WEST);

        dock.setWidth(Sizes.HUNDRED_PERCENT);
        setWidget(dock);

        // handle default button selection (deferred)
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
            public void execute() {
                ((PreferredButton) flow.getWidget(defaultButtonIndex)).setFocus(true);
            }
        });

    }

    /**
     * Returns a list of buttons to add in the messgae box.
     * @return a {@link PreferredButton}[]
     */
    public abstract PreferredButton[] getPreferredButtons();

    /**
     * Returns the default button.
     * @return the {@link PreferredButton} which will be selected by default
     */
    public abstract PreferredButton getDefaultButton();

    /**
     * Gets hide handler
     * @return the hideHandler
     */
    public HideHandler getHideHandler() {
        return hideHandler;
    }

    /**
     * Sets Hide handler
     * @param hideHandler
     *            the hideHandler to set
     */
    public void setHideHandler(HideHandler hideHandler) {
        this.hideHandler = hideHandler;
    }

    /**
     * Overridden so the Box is always centered
     */
    public void open() {
        center();
    }

}